CN117342851B - Green anti-cracking carbon-reducing bare concrete and preparation method thereof - Google Patents
Green anti-cracking carbon-reducing bare concrete and preparation method thereof Download PDFInfo
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- CN117342851B CN117342851B CN202311272596.6A CN202311272596A CN117342851B CN 117342851 B CN117342851 B CN 117342851B CN 202311272596 A CN202311272596 A CN 202311272596A CN 117342851 B CN117342851 B CN 117342851B
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- 239000004567 concrete Substances 0.000 title claims abstract description 73
- 238000005336 cracking Methods 0.000 title claims abstract description 60
- 238000002360 preparation method Methods 0.000 title claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 239000004568 cement Substances 0.000 claims abstract description 48
- 239000002893 slag Substances 0.000 claims abstract description 48
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 34
- 239000003223 protective agent Substances 0.000 claims abstract description 24
- 239000010881 fly ash Substances 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- RVTLUDOREOUENW-UHFFFAOYSA-N [O--].[O--].[SiH4].[Ti+4] Chemical compound [O--].[O--].[SiH4].[Ti+4] RVTLUDOREOUENW-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000004576 sand Substances 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 19
- 239000011324 bead Substances 0.000 claims abstract description 19
- 238000007667 floating Methods 0.000 claims abstract description 19
- 239000010451 perlite Substances 0.000 claims abstract description 18
- 235000019362 perlite Nutrition 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 18
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 18
- 239000010440 gypsum Substances 0.000 claims abstract description 13
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 238000000498 ball milling Methods 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims description 56
- 238000012360 testing method Methods 0.000 claims description 21
- 239000011248 coating agent Substances 0.000 claims description 20
- 238000000576 coating method Methods 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 18
- 239000011259 mixed solution Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 16
- 239000002904 solvent Substances 0.000 claims description 14
- 239000000839 emulsion Substances 0.000 claims description 13
- 229910000077 silane Inorganic materials 0.000 claims description 13
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 11
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 11
- -1 polyoxypropylene glycerol Polymers 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000010936 titanium Substances 0.000 claims description 9
- 229910052719 titanium Inorganic materials 0.000 claims description 9
- 239000003822 epoxy resin Substances 0.000 claims description 8
- 229920000647 polyepoxide Polymers 0.000 claims description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 7
- RRDQTXGFURAKDI-UHFFFAOYSA-N formaldehyde;naphthalene-2-sulfonic acid Chemical compound O=C.C1=CC=CC2=CC(S(=O)(=O)O)=CC=C21 RRDQTXGFURAKDI-UHFFFAOYSA-N 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 7
- 229910017604 nitric acid Inorganic materials 0.000 claims description 7
- 229950008882 polysorbate Drugs 0.000 claims description 7
- 229920000136 polysorbate Polymers 0.000 claims description 7
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 6
- 239000002202 Polyethylene glycol Substances 0.000 claims description 6
- 239000004917 carbon fiber Substances 0.000 claims description 6
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 claims description 6
- POULHZVOKOAJMA-UHFFFAOYSA-M dodecanoate Chemical compound CCCCCCCCCCCC([O-])=O POULHZVOKOAJMA-UHFFFAOYSA-M 0.000 claims description 6
- RBNPOMFGQQGHHO-UHFFFAOYSA-N glyceric acid Chemical compound OCC(O)C(O)=O RBNPOMFGQQGHHO-UHFFFAOYSA-N 0.000 claims description 6
- 239000003999 initiator Substances 0.000 claims description 6
- 229940070765 laurate Drugs 0.000 claims description 6
- 229920005610 lignin Polymers 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 229910052627 muscovite Inorganic materials 0.000 claims description 6
- 229920001223 polyethylene glycol Polymers 0.000 claims description 6
- WBIQQQGBSDOWNP-UHFFFAOYSA-N 2-dodecylbenzenesulfonic acid Chemical compound CCCCCCCCCCCCC1=CC=CC=C1S(O)(=O)=O WBIQQQGBSDOWNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 5
- 229940060296 dodecylbenzenesulfonic acid Drugs 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- 229920000570 polyether Polymers 0.000 claims description 5
- 229920002545 silicone oil Polymers 0.000 claims description 5
- 239000010455 vermiculite Substances 0.000 claims description 5
- 229910052902 vermiculite Inorganic materials 0.000 claims description 5
- 235000019354 vermiculite Nutrition 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000010754 BS 2869 Class F Substances 0.000 claims description 2
- 238000003980 solgel method Methods 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 4
- 239000003517 fume Substances 0.000 claims 1
- 239000004570 mortar (masonry) Substances 0.000 claims 1
- 239000001397 quillaja saponaria molina bark Substances 0.000 claims 1
- 229930182490 saponin Natural products 0.000 claims 1
- 150000007949 saponins Chemical class 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- 238000001179 sorption measurement Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 17
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 238000012423 maintenance Methods 0.000 description 9
- 238000007710 freezing Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 230000008014 freezing Effects 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000000227 grinding Methods 0.000 description 6
- 238000011282 treatment Methods 0.000 description 6
- 239000000395 magnesium oxide Substances 0.000 description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 5
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 5
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 229910052918 calcium silicate Inorganic materials 0.000 description 4
- 235000012241 calcium silicate Nutrition 0.000 description 4
- 229930189092 Notoginsenoside Natural products 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 3
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 229910021653 sulphate ion Inorganic materials 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- HXOGQBSDPSMHJK-UHFFFAOYSA-N triethoxy(6-methylheptyl)silane Chemical compound CCO[Si](OCC)(OCC)CCCCCC(C)C HXOGQBSDPSMHJK-UHFFFAOYSA-N 0.000 description 2
- ZAJAQTYSTDTMCU-UHFFFAOYSA-N 3-aminobenzenesulfonic acid Chemical compound NC1=CC=CC(S(O)(=O)=O)=C1 ZAJAQTYSTDTMCU-UHFFFAOYSA-N 0.000 description 1
- 235000008585 Pinus thunbergii Nutrition 0.000 description 1
- 241000218686 Pinus thunbergii Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- NAYZMSNLBRPCBX-SSPAHAAFSA-N dodecanoic acid;(2r,3s,4r,5r)-2,3,4,5,6-pentahydroxyhexanal Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O.CCCCCCCCCCCC(O)=O NAYZMSNLBRPCBX-SSPAHAAFSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 150000008130 triterpenoid saponins Chemical class 0.000 description 1
- 210000004127 vitreous body Anatomy 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5041—Titanium oxide or titanates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00224—Green materials, e.g. porous green ceramic preforms
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
本发明公开了一种抗裂绿色降碳清水混凝土，各组分及其所占重量份数包括：超硫酸盐水泥400～500份，粉煤灰100～150份，微硅粉20～30份，漂珠50～100，膨胀珍珠岩50～90份，钢渣砂500～650，卵石900～1100份，降粘型抗裂减水剂5～15份，水150～180份，同时其表面涂抹纳米二氧化钛‑硅烷表面保护剂；其中，所述超硫酸盐水泥以电石渣水泥熟料、矿渣和脱硫石膏为主要原料进行球磨得到。本发明可有效提高清水混凝土强度、抗裂性能、表观碳吸附性能，并兼顾良好的抗裂抗冻抗渗性能、后期抗压强度高和降碳等优异特性，具有良好的环境和经济效益，适合推广应用。The invention discloses a kind of crack-resistant green carbon-reducing clear water concrete, each component and its weight proportion include: 400-500 parts of super sulfate cement, 100-150 parts of fly ash, 20-30 parts of microsilica powder, 50-100 parts of floating beads, 50-90 parts of expanded perlite, 500-650 parts of steel slag sand, 900-1100 parts of pebbles, 5-15 parts of viscosity-reducing anti-cracking water reducer, 150-180 parts of water, and nano titanium dioxide-silane surface protective agent is applied to its surface at the same time; wherein, the super sulfate cement is obtained by ball milling with carbide slag cement clinker, slag and desulfurized gypsum as main raw materials. The present invention can effectively improve the strength, crack resistance and apparent carbon adsorption performance of clear water concrete, and take into account the excellent characteristics such as good crack resistance, frost resistance and impermeability resistance, high late compressive strength and carbon reduction, with good environmental and economic benefits, suitable for promotion and application.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to green anti-cracking carbon-reduction bare concrete and a preparation method thereof.
Background
In recent years, the clear water concrete is increasingly applied to industrial and civil building engineering, and takes the natural state formed by combining the natural texture of the concrete with bolt holes, open seams, buddha seams and the like as decoration, and has the main advantages that 1) the total manufacturing cost of a factory is saved, the clear water concrete is not externally decorated, the clear water concrete is cast and molded once, the cost of plastering layers and surface layers can be saved, the engineering cost is reduced, 2) the maintenance cost in the building process is reduced, the clear water concrete is not plastered, the quality defects of hollowing, cracking, falling off and the like of a general concrete structure engineering are avoided, and the maintenance workload, the difficulty and the cost are reduced, and 3) the generation of building rubbish can be greatly reduced.
However, bare concrete is extremely easy to be damaged by various erosion in the natural environment for a long time, and can cause microcracks on the surface, and further cause problems of concrete cracking, falling, steel bar corrosion and the like, thereby affecting the aesthetic property of the building surface and even the stability of the whole building. The existing research technology mainly improves the fluidity and air tightness of the bare concrete, harmful substances remain on the surface, the problems of bleeding, segregation, poor mold removal and the like are easy to occur, and in addition, the problems of freezing resistance, cracking resistance and the like are not generally solved.
Therefore, the clear water concrete which can give consideration to the good mechanical property, working property, crack resistance, frost resistance and the like is further explored, and has important research and application significance.
Disclosure of Invention
The invention aims to provide the anti-cracking green carbon-reduction bare concrete, which can effectively improve the strength, the anti-cracking performance and the apparent carbon adsorption performance of the bare concrete, has the excellent characteristics of good anti-cracking, anti-freezing and anti-permeability performance, high later-stage compressive strength, carbon reduction and the like, has good environmental and economic benefits, and is suitable for popularization and application.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The environment-friendly anti-cracking and carbon-reducing bare concrete comprises, by weight, 400-500 parts of super sulfate cement, 100-150 parts of fly ash, 20-30 parts of silica fume, 50-100 parts of floating beads, 50-90 parts of expanded perlite, 500-650 parts of steel slag sand, 900-1100 parts of pebbles, 5-15 parts of viscosity-reducing anti-cracking water reducer and 150-180 parts of water, and meanwhile, a nano titanium dioxide-silane surface protective agent is coated on the surface of the super sulfate cement, wherein the super sulfate cement is obtained by ball milling carbide slag cement clinker, slag and desulfurized gypsum serving as main raw materials.
In the scheme, the specific surface area of the super-sulfate cement is 380-420 m 2/kg, and the 28d strength is 45.6-49.5 MPa.
In the scheme, the super-sulfate cement comprises, by weight, 5-10 parts of carbide slag cement clinker, 75-85 parts of slag and 3-8 parts of desulfurized gypsum.
In the scheme, the calcium silicate mineral content in the carbide slag cement clinker is 67-69 wt%, the free calcium oxide content is 1.0-1.2 wt%, the magnesium oxide content is 0.5-0.65 wt%, the magnesium oxide content in the slag is 3.5-4.2 wt%, and the sum of the glass body and dicalcium silicate content is 93-95 wt%.
Further, in the ball milling process, grinding aids (preferably triethanolamine and the like) accounting for 0.01-0.05% of the total mass of the carbide slag cement clinker, slag and desulfurized gypsum are also introduced.
In the scheme, the concrete preparation method of the super sulfate cement comprises the steps of ball milling carbide slag cement clinker for 15-20 min under the condition of dropwise adding grinding aid, adding slag and desulfurized gypsum, mixing and ball milling for 20-30 min.
In the scheme, the preparation method of the viscosity-reducing anti-cracking water reducer comprises the following steps of:
1) Adding beta-naphthalene sulfonate formaldehyde condensate and polyethylene glycol laurate into water, mixing uniformly (20-30 min) to obtain a mixed solution A, diluting sodium methoxide, a compound alcohol solvent and polysorbate with water, mixing with the mixed solution A, heating and stirring, cooling (25-35 ℃), adding muscovite powder and vermiculite powder, stirring for the second time, adding triterpenoid saponin, stirring for the third time to obtain a mixed solution B, and taking out;
2) Under the heating condition, adding dodecylbenzene sulfonic acid and polyoxypropylene glycerol ether polyether modified silicone oil into water, stirring for four times, adding an initiator (such as ammonium persulfate and the like), stirring, adding lignin and carbon fiber yarns, stirring for five times, standing to reduce the internal temperature to 45-55 ℃, adding a mixed solution B, stirring for six times, and standing to reduce the temperature to normal temperature (20+/-3 ℃), thus obtaining the viscosity-reducing anti-cracking water reducer.
In the preparation process of the viscosity-reducing anti-cracking water reducer, the viscosity-reducing anti-cracking water reducer comprises, by weight, 35-55 parts of beta-naphthalene sulfonate formaldehyde condensate, 25-35 parts of polyethylene glycol laurate, 2-5 parts of sodium methoxide, 6-10 parts of a compound alcohol solvent (3-5 parts of ethylene glycol, 3-5 parts of methanol), 11-15 parts of polysorbate, 20-35 parts of muscovite powder, 10-25 parts of vermiculite powder, 15-35 parts of notoginsenoside, 25-55 parts of dodecylbenzenesulfonic acid, 15-25 parts of polyoxypropylene glycerol ether polyether modified silicone oil, 10-20 parts of lignin, 5-10 parts of carbon fiber filaments and 15-25 parts of an initiator.
In the scheme, the heating and stirring treatment step in the step 1) comprises the steps of stirring at 25-35 ℃ for 25-30 min, heating to 55-65 ℃ and stirring for 25-30 min.
In the scheme, the secondary stirring treatment temperature is 25-35, the time is 10-15 min, the tertiary stirring treatment temperature is 25-35 ℃ and the time is 25-30 min.
In the scheme, the four stirring treatments are performed at 55-65 ℃ for 10-15 min, the stirring reaction time is 10-15 min, the five stirring treatments are performed at 55-65 ℃ for 20-30 min, and the six stirring treatments are performed for 65-75 min.
In the scheme, the effective solid content of the viscosity-reducing anti-cracking water reducer is 20-28%.
The nano titanium dioxide-silane surface protecting agent is prepared by using a silane emulsion, nano titanium dioxide and epoxy resin as main components, using the silane emulsion as a matrix, using tetrabutyl titanate as a titanium source, using an alcohol solvent, nitric acid and epoxy resin as a composite solvent and adopting a sol-gel method, and concretely comprises the steps of adding the titanium source into the alcohol solvent with the dosage of 5-15%, uniformly mixing to obtain solution A, adding the epoxy resin and the nitric acid into the residual alcohol solvent, uniformly mixing to obtain solution B, adding the solution B into the solution A, carrying out primary stirring until the sol is milky, stopping stirring, and then adding the obtained titanium dioxide sol into the silane emulsion dispersed by ultrasonic waves, and carrying out secondary stirring.
In the scheme, the nano titanium dioxide-silane surface protective agent comprises, by weight, 5-15 parts of a titanium source, 20-45 parts of an alcohol solvent, 5-15 parts of nitric acid, 15-30 parts of epoxy resin and 150-180 parts of silane emulsion.
In the above scheme, the titanium source may be tetrabutyl titanate or the like.
In the scheme, the concentration of the nitric acid is 45-55wt%.
In the scheme, the silane emulsion is isooctyltriethoxysilane emulsion, the density is 0.88-0.90 g/cm 3, and the purity is 88-92%.
In the scheme, the drop acceleration is 1-2 drops/s.
In the scheme, the primary stirring time is 25-45 min, and the secondary stirring time is 40-80 min.
The preparation method of the anti-cracking green carbon-reducing bare concrete comprises the following steps:
1) Weighing the raw materials according to the proportion, wherein the raw materials comprise, by weight, 400-500 parts of super sulfate cement, 100-150 parts of fly ash, 20-30 parts of silica fume, 50-100 parts of floating beads, 50-90 parts of expanded perlite, 500-650 parts of steel slag sand, 900-1100 parts of pebbles, 5-15 parts of viscosity-reducing anti-cracking water reducer and 150-180 parts of water;
2) Adopting a forced stirrer, firstly mixing floating beads, expanded perlite, steel slag sand, pebbles and water with the dosage of 30-40% for the first time, then adding super sulfate cement, fly ash and silica fume for the second time, and finally adding the rest water and the viscosity-reducing anti-cracking water reducer for the third time to obtain a mixture;
3) Pouring the obtained mixture, molding, coating a nano titanium dioxide-silane surface protective agent on the surface of the obtained molded test block, and finally performing surface coating maintenance to obtain the green anti-cracking carbon-reduction bare concrete.
In the scheme, the primary mixing time is 30-45 s, the secondary mixing time is 30-45 s, and the tertiary mixing time is 60-120 s.
In the scheme, the temperature adopted in the mixing step is normal temperature, the temperature is 15-25 ℃, and the relative humidity is more than 50%.
Further, the titanium dioxide-silane surface protective agent is arranged by directly coating or brushing the surface of the molding test block on the surface of the pouring mold.
In the scheme, the setting amount of the titanium dioxide-silane surface protective agent on the surface of the anti-cracking green carbon-reduction bare concrete is 300-500 g/m 2.
The anti-cracking green carbon-reducing bare concrete prepared according to the scheme has the compression strength of 38-55 MPa for 28d, the slump of 210-225 mm, the expansion degree of 580-616 mm, the freezing resistance grade of F200-F250, the impermeability grade of P20-P26, the shrinkage rate of 110X 10 -6~250×10-6 for 3d and the total cracking area of 90-300 mm 2/m2 per unit area.
The principle of the invention is as follows:
Aiming at the problems of impermeability, crack resistance, frost resistance and the like of the whole period of the bare concrete, firstly, carbide slag clinker and slag are used
The super sulfate cement is prepared by taking the main raw materials, the lower hydration heat can ensure that the strength of the concrete is stably developed, and the stability is more stable
The secondary slag hydration of the super sulfate cement ensures that the concrete is more compact, and the overall strength and durability of the concrete are improved;
Secondly, in the early stage of the concrete, adopting beta-naphthalene sulfonate formaldehyde condensate as the main material, polyethylene glycol laurate and polysorbate
The anti-cracking water reducer with the auxiliary components of ester, muscovite powder, carbon fiber yarn and the like effectively prevents early shrinkage of concrete and enhances the output of the concrete
The machine stability is improved, the compactness of the concrete is increased, the early stability and the later durability of the concrete are ensured, and finally the concrete is arranged on the surface of the concrete
And (3) coating a titanium dioxide-silane surface protective agent, so that the long-term weather resistance of the obtained bare concrete is further improved.
Compared with the prior art, the invention has the beneficial effects that:
1) The viscosity-reducing anti-cracking water reducer can effectively reduce the adsorption of cement soil to the water reducer, so that all materials of the bare concrete are dispersed more uniformly, and the related preparation method is simpler, does not need high-temperature synthesis, and is good in adaptability to various environments;
2) The carbide slag clinker adopted by the super-sulfate cement is beneficial to reducing carbon and emission of cement factories, has lower free calcium oxide and magnesium oxide than common clinker, and has better stability;
3) The nano-scale surface protective agent prepared by adopting the nano-scale titanium source has excellent compatibility with silane emulsion, fully plays the role of nano titanium dioxide, is more beneficial to the surface adsorption of concrete and protects the appearance of bare concrete, has the adsorption effect on harmful ions and carbon dioxide in the environment, and is beneficial to improving the carbon reduction level in the concrete industry.
Detailed Description
For a further understanding of the present invention, preferred embodiments of the invention are described below in conjunction with the examples, which are provided to further illustrate the features and advantages of the invention, and not to limit the claims of the invention.
The preparation method comprises the steps of adding 50 parts of beta-naphthalene sulfonate formaldehyde condensate and 30 parts of polyethylene glycol laurate into 120 parts of water, mixing for 25 minutes to obtain a mixed solution A, mixing 3 parts of sodium methoxide, 3 parts of ethylene glycol, 3 parts of methanol and 13 parts of polysorbate (with molecular weight of 604) with the mixed solution A, heating to 60 ℃, stirring for 30 minutes, cooling to 30 ℃, then adding 30 parts of muscovite powder and 15 parts of vermiculite powder, stirring for 15 minutes, adding 21 parts of notoginsenoside, stirring for 28 minutes to obtain a mixed solution B, taking out, adding 115 parts of water, heating to 60 ℃, adding 35 parts of dodecylbenzenesulfonic acid and 22 parts of polyoxypropylene glycerol ether polyether modified silicone oil into water, stirring for 15 minutes, adding 19.8 parts of initiator ammonium persulfate, stirring for 10 minutes, adding 15 parts of lignin and 7 parts of carbon fiber waste silk, stirring for 25 minutes, standing, reducing the internal temperature to 50 ℃, then adding the mixed solution B, stirring for 60 minutes, and standing to 22 ℃ at normal temperature, thus obtaining the viscosity reduction type water reducer, wherein the viscosity reduction type water reducer is prepared by using the modified polyoxypropylene glycerol ether with the density of 5705 mL.
The preparation method of the surface protective agent comprises the steps of adding 15 parts of tetrabutyl titanate into 25 parts of isopropanol solvent, uniformly mixing to obtain solution A, adding 25 parts of epoxy resin and 12 parts of nitric acid (with the concentration of 48 wt%) into 16 parts of isopropanol solvent, uniformly mixing to obtain solution B, dripping the solution B into the solution A at the speed of 1-2 drops/s, stirring for 35min, stopping stirring until the sol is milky white, adding the obtained AB mixed solution into 165 parts of silane emulsion dispersed by ultrasonic waves, and stirring for 65min to obtain the titanium dioxide-silane surface protective agent for the embodiment. The silane emulsion used was isooctyltriethoxysilane emulsion provided by Jack, and had a density of 0.9g/cm 3 and a purity of 89%.
The activity of the adopted fly ash class F II fly ash and 28d rubber sand is 70%, the activity of the micro silicon powder is 90 grades, the specific surface area is 24500m 2/kg, the floating bead density is 700kg/m 3, the expanded perlite density is 2600kg/m 3, the steel slag sand density is 3650kg/m 3, and the gradation of pebbles is 5-26.5 mm.
Example 1
The anti-cracking green carbon-reducing bare concrete comprises, by mass, 500 parts of super sulfate cement, 100 parts of fly ash, 20 parts of silica fume, 50 parts of floating beads, 50 parts of expanded perlite, 550 parts of steel slag sand, 980 parts of pebble, 11.2 parts of viscosity-reducing anti-cracking water reducer and 160 parts of water; the preparation method comprises the following specific steps:
The method comprises the steps of adopting a forced stirrer, firstly stirring weighed floating beads, expanded perlite, steel slag sand, pebbles and 40% of water for 45s, then adding super-sulfate cement, fly ash and silica fume, stirring for 45s, finally adding the rest water and a viscosity-reducing anti-cracking water reducer, stirring for 95s continuously to obtain a mixture, wherein the indoor temperature is 23 ℃ and the relative humidity is 60%, pouring the obtained mixture, molding, coating titanium dioxide-silane surface protective agent on the surface of the obtained molded test block, coating the surface of the molded test block with 480g/m 2, and finally carrying out surface coating film maintenance to obtain the anti-cracking green carbon-reducing bare concrete.
The super-sulphate cement has a specific surface area of 395m 2/kg and 28d strength of 48.5MPa, wherein the super-sulphate cement comprises 10 parts of carbide slag cement clinker, 85 parts of slag, 5 parts of desulfurized gypsum and 3 parts of triethanolamine as an external grinding aid, and the preparation method of the super-sulphate cement comprises the steps of drying gypsum, dropwise adding the grinding aid into the carbide slag cement clinker, ball-milling for 20min, adding slag and desulfurized gypsum, mixing and ball-milling for 25min.
Through tests, the 28d compressive strength of the obtained clear water concrete can reach 48.6MPa, the slump is 215mm, the expansion degree is 595mm, the freezing resistance grade is F250, the impermeability grade is P24, the 3d shrinkage rate is 149 multiplied by 10 -6, and the total cracking area per unit area can reach 152mm 2/m2.
Example 2
The anti-cracking green carbon-reducing bare concrete comprises, by mass, 400 parts of super sulfate cement (same as in example 1), 150 parts of fly ash, 25 parts of silica fume, 70 parts of floating beads, 60 parts of expanded perlite, 600 parts of steel slag sand, 930 parts of pebble, 11 parts of a viscosity-reducing anti-cracking water reducer and 175 parts of water, and specifically comprises the following preparation steps:
The method comprises the steps of adopting a forced stirrer, firstly stirring weighed floating beads, expanded perlite, steel slag sand, pebbles and 35% of water for 40s, then adding super-sulfate cement, fly ash and modified silica fume, stirring for 30s, finally adding the rest water and a viscosity-reducing type anti-cracking water reducer, stirring for 100s continuously to obtain a mixture, wherein the indoor temperature is 23 ℃ and the relative humidity is 60%, pouring the obtained mixture, molding, coating titanium dioxide-silane surface protective agent on the surface of the obtained molded test block, coating the surface of the molded test block with the coating amount of 310g/m 2, and finally carrying out surface coating film maintenance to obtain the anti-cracking green carbon-reducing bare concrete.
Through tests, the 28d compressive strength of the obtained clear water concrete can reach 44.9MPa, the slump is 220mm, the expansion degree is 610mm, the freezing resistance grade is F200, the impermeability grade is P22, the 3d shrinkage rate is 247 multiplied by 10 -6, and the total cracking area per unit area can reach 254mm 2/m2.
Example 3
The anti-cracking green carbon-reducing bare concrete comprises, by mass, 400 parts of super sulfate cement, 150 parts of fly ash, 25 parts of silica fume, 70 parts of floating beads, 60 parts of expanded perlite, 600 parts of steel slag sand, 930 parts of pebble, 11 parts of viscosity-reducing anti-cracking water reducer and 175 parts of water, wherein a forced stirrer is adopted to stir the floating beads, the expanded perlite, the steel slag sand, the pebble and 35% of water together for 40s, then the super sulfate cement, the fly ash and the silica fume are added to stir together for 30s, finally the rest water and the water reducer are added to stir continuously for 100s to obtain a mixture, the indoor temperature is 203 ℃ during stirring, the relative humidity is 60%, the obtained mixture is poured, the surface of the obtained molded test block is coated with a titanium dioxide-silane surface protective agent, the setting amount is 400g/m 2, and finally the surface coating film is used for curing, so that the anti-cracking green carbon-reducing bare concrete is obtained.
The adopted super sulfate cement is approximately the same as the preparation method of the embodiment 1, and the difference is that the raw materials comprise 5 parts of carbide slag cement clinker, 88 parts of slag, 7 parts of desulfurized gypsum and 4 parts of triethanolamine as an additive.
Through tests, the 28d compressive strength of the obtained clear water concrete can reach 40.9MPa, the slump is 215mm, the expansion degree is 590mm, the freezing resistance grade is F200, the impermeability grade is P20, the 3d shrinkage rate is 125 multiplied by 10 -6, and the total cracking area per unit area can reach 198mm 2/m2.
Comparative example 1
The preparation method of the bare concrete is almost the same as that of example 1, except that asphalt protectant (provided by well-known and well-known Utility) is smeared on the surface of the obtained molded test block, the setting amount is 480g/m 2, and finally, surface coating film maintenance is carried out.
Through tests, the 28d compressive strength of the obtained clear water concrete can reach 48.2MPa, the slump is 215mm, the expansion degree is 595mm, the 3d shrinkage rate is 195×10 -6, the total cracking area per unit area can reach 365mm 2/m2, and the surface is browned.
Comparative example 2
The bare concrete comprises, by mass, 400 parts of ordinary Portland cement (green pine P.O 42.5R), 150 parts of fly ash, 25 parts of silica fume, 70 parts of floating beads, 60 parts of expanded perlite, 600 parts of steel slag sand, 930 parts of pebble, 11 parts of viscosity-reducing anti-cracking water reducer and 175 parts of water, stirring the floating beads, the expanded perlite, the steel slag sand, the pebble and 35% of water for 40s by a forced stirrer, adding ordinary Portland cement, the fly ash and the modified silica fume, stirring for 30s, adding the rest water and the water reducer, stirring for 100s, obtaining a mixture, wherein the indoor temperature is 23 ℃ and the relative humidity is 60%, pouring the obtained mixture, molding, coating titanium dioxide-silane surface protecting agent on the surface of the obtained molded test block, setting the amount to be 310g/m 2, and performing surface coating film maintenance.
Through tests, the 28d compressive strength of the obtained clear water concrete can reach 45.8MPa, the slump is 185mm, the expansion degree is 530mm, the 3d shrinkage rate is 462 multiplied by 10 -6, the total cracking area per unit area can reach 552mm 2/m2, and a plurality of tiny cracks which cannot be counted exist on the surface.
Comparative example 3
The preparation method of the bare concrete is approximately the same as that of the example 1, and is characterized in that the water reducer is a common polycarboxylate water reducer (the water reducing rate is 25%) and is mixed with an anti-cracking additive (Hebei Tongbang XY-1), titanium dioxide-silane surface protecting agent is smeared on the surface of the obtained molded test block, the setting amount is 480g/m 2, and finally, surface coating film maintenance is carried out.
Through tests, the 28d compressive strength of the obtained clear water concrete can reach 35.2MPa, the slump is 190mm, the expansion degree is 55mm, the 3d shrinkage rate is 524 multiplied by 10 -6, and the total cracking area per unit area can reach 415mm 2/m2.
Comparative example 4
The bare concrete is prepared from (by weight) Portland cement clinker 10 parts, slag powder 85 parts, anhydrous gypsum 5 parts, and additive grinding aid triethanolamine 3 parts, wherein the content of calcium silicate mineral in the cement clinker is 64wt%, the content of free calcium oxide is 2.9wt%, the content of magnesium oxide is 1.5wt%, the content of magnesium oxide in the slag powder is 6.8wt%, the content of vitreous body and dicalcium silicate is 9.2wt%, and the preparation method of the super sulfate cement comprises the steps of drying gypsum, mixing the cement clinker, the slag powder and the gypsum, and dropwise adding the grinding aid and ball milling for 45min. The specific surface area of the prepared cement is 355m 2/kg, and the 28d strength is 41.5MPa.
Through tests, the obtained clear water concrete has the compression strength of 32.5MPa for 28d, the slump of 205mm, the expansion degree of 555mm, the freezing resistance grade of F100, the impermeability grade of P8, the shrinkage rate of 296×10 -6 for 3d and the total cracking area of 392mm 2/m2 per unit area.
Comparative example 5
The anti-cracking green carbon-reducing bare concrete comprises the following components, by mass, 500 parts of super sulfate cement, 100 parts of fly ash, 20 parts of silica fume, 50 parts of floating beads, 50 parts of expanded perlite, 550 parts of steel slag sand, 980 parts of pebble, 11.2 parts of viscosity-reducing anti-cracking water reducer and 160 parts of water, wherein the concrete preparation steps are as follows:
The method comprises the steps of adopting a forced stirrer, firstly stirring weighed floating beads, expanded perlite, steel slag sand, pebbles and 40% of water for 45s, then adding super-sulfate cement, fly ash and silica fume, stirring for 45s, finally adding the rest water and a viscosity-reducing anti-cracking water reducer, stirring for 95s continuously to obtain a mixture, wherein the indoor temperature is 23 ℃ and the relative humidity is 60%, pouring the obtained mixture, molding, coating titanium dioxide-silane surface protective agent on the surface of the obtained molded test block, coating the surface of the molded test block with 480g/m 2, and finally carrying out surface coating film maintenance to obtain the anti-cracking green carbon-reducing bare concrete.
The preparation method of the water reducer comprises the steps of adding 50 parts of beta-naphthalene sulfonate formaldehyde condensate, 30 parts of glucose laurate, 3 parts of sodium methoxide, 6 parts of methanol and 13 parts of polysorbate into 120 parts of water, heating to 60 ℃, stirring for 50min to obtain a mixed solution A, then adding 115 parts of water, heating to 60 ℃, adding 21 parts of notoginsenoside, 35 parts of aminobenzenesulfonic acid, 22 parts of methyl silicone oil, 15 parts of lignin, 15 parts of initiator ammonium persulfate, stirring for 60min to obtain a mixed solution B, then adding the mixed solution A, stirring for 60min, standing and reducing to normal temperature of 22 ℃ to obtain the water reducer used in the comparative example.
Through tests, the 28d compressive strength of the obtained clear water concrete can reach 33.2MPa, the slump is 185mm, the expansion degree is 550mm, the freezing resistance grade is F100, the impermeability grade is P6, the 3d shrinkage rate is 452 multiplied by 10 -6, and the total cracking area per unit area can reach 524mm 2/m2.
The invention is not limited to the embodiments described above, but a number of modifications and adaptations can be made by a person skilled in the art without departing from the principle of the invention, which modifications and adaptations are also considered to be within the scope of the invention. What is not described in detail in this specification is prior art known to those skilled in the art.
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| CN107827379A (en) * | 2017-11-28 | 2018-03-23 | 唐山北极熊建材有限公司 | High anti-folding ultra-sulphate cement and preparation method thereof |
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| CN109456008A (en) * | 2018-12-27 | 2019-03-12 | 浙江大经住工科技有限公司 | A kind of freeze proof anti-crack concrete and preparation method thereof |
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| CN107827379A (en) * | 2017-11-28 | 2018-03-23 | 唐山北极熊建材有限公司 | High anti-folding ultra-sulphate cement and preparation method thereof |
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