CN118637855B - Super high early strength shotcrete admixture and preparation method and application thereof - Google Patents
Super high early strength shotcrete admixture and preparation method and application thereof Download PDFInfo
- Publication number
- CN118637855B CN118637855B CN202411106207.7A CN202411106207A CN118637855B CN 118637855 B CN118637855 B CN 118637855B CN 202411106207 A CN202411106207 A CN 202411106207A CN 118637855 B CN118637855 B CN 118637855B
- Authority
- CN
- China
- Prior art keywords
- parts
- early strength
- admixture
- agent
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000011378 shotcrete Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 36
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 32
- 239000000375 suspending agent Substances 0.000 claims abstract description 29
- 239000013078 crystal Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 21
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical class COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 19
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Chemical class OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 18
- 239000000835 fiber Substances 0.000 claims abstract description 17
- 150000002148 esters Chemical class 0.000 claims abstract description 14
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 11
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 9
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 8
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 8
- 239000007864 aqueous solution Substances 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 58
- 239000004567 concrete Substances 0.000 claims description 29
- 238000006243 chemical reaction Methods 0.000 claims description 22
- -1 hydroxyethyl ester Chemical class 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 13
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 10
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 10
- 229920002401 polyacrylamide Polymers 0.000 claims description 9
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 5
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical group [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- DZSVIVLGBJKQAP-UHFFFAOYSA-N 1-(2-methyl-5-propan-2-ylcyclohex-2-en-1-yl)propan-1-one Chemical compound CCC(=O)C1CC(C(C)C)CC=C1C DZSVIVLGBJKQAP-UHFFFAOYSA-N 0.000 claims description 3
- IRLPACMLTUPBCL-KQYNXXCUSA-N 5'-adenylyl sulfate Chemical compound C1=NC=2C(N)=NC=NC=2N1[C@@H]1O[C@H](COP(O)(=O)OS(O)(=O)=O)[C@@H](O)[C@H]1O IRLPACMLTUPBCL-KQYNXXCUSA-N 0.000 claims description 3
- 239000000378 calcium silicate Substances 0.000 claims description 3
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 3
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical group [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 3
- 239000000178 monomer Substances 0.000 claims description 3
- 238000006845 Michael addition reaction Methods 0.000 claims description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 2
- 239000002202 Polyethylene glycol Substances 0.000 claims description 2
- 125000003545 alkoxy group Chemical group 0.000 claims description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 2
- 229920000768 polyamine Polymers 0.000 claims description 2
- 150000004291 polyenes Chemical class 0.000 claims description 2
- 229920001223 polyethylene glycol Polymers 0.000 claims description 2
- 125000003277 amino group Chemical group 0.000 claims 1
- 239000003125 aqueous solvent Substances 0.000 claims 1
- WCASXYBKJHWFMY-UHFFFAOYSA-N crotyl alcohol Chemical compound CC=CCO WCASXYBKJHWFMY-UHFFFAOYSA-N 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 13
- 239000011435 rock Substances 0.000 abstract description 8
- 238000005507 spraying Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 239000004566 building material Substances 0.000 abstract description 2
- 239000000428 dust Substances 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 36
- 239000000654 additive Substances 0.000 description 26
- 238000002156 mixing Methods 0.000 description 26
- 230000000996 additive effect Effects 0.000 description 25
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 22
- 239000007788 liquid Substances 0.000 description 12
- 239000000843 powder Substances 0.000 description 11
- 239000000377 silicon dioxide Substances 0.000 description 10
- BYDRTKVGBRTTIT-UHFFFAOYSA-N 2-methylprop-2-en-1-ol Chemical compound CC(=C)CO BYDRTKVGBRTTIT-UHFFFAOYSA-N 0.000 description 9
- 239000004698 Polyethylene Substances 0.000 description 9
- 238000001514 detection method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 239000003995 emulsifying agent Substances 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 9
- 229920000573 polyethylene Polymers 0.000 description 9
- 235000012239 silicon dioxide Nutrition 0.000 description 9
- 239000000725 suspension Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- 239000002667 nucleating agent Substances 0.000 description 5
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920001222 biopolymer Polymers 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/043—Alkaline-earth metal silicates, e.g. wollastonite
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2641—Polyacrylates; Polymethacrylates
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
本发明涉及建筑材料技术领域，具体是一种超高早强喷射混凝土外加剂及其制备方法和应用，该外加剂包括以下组分：硅灰、减水剂、晶核早强剂、改性酯、丙烯酸、悬浮剂、碳酸钠、聚乙烯醇纤维以及水。本发明的超高早强喷射混凝土外加剂为水剂使用方便，减少扬尘，可泵性好，可适应多种施工环境，此外该外加剂的掺量低，可显著提高喷射混凝的早期强度，且提高最终强度，适用于矿山、水利、隧道、地铁的岩爆的防治与渗水洞段的喷射可解决常规喷砼在渗水洞段无法完成的喷射工艺。The present invention relates to the technical field of building materials, specifically to an ultra-high early strength shotcrete admixture and a preparation method and application thereof, wherein the admixture comprises the following components: silica fume, a water reducing agent, a crystal nucleus early strength agent, a modified ester, acrylic acid, a suspending agent, sodium carbonate, polyvinyl alcohol fiber and water. The ultra-high early strength shotcrete admixture of the present invention is an aqueous solution, which is convenient to use, reduces dust, has good pumpability, and can adapt to a variety of construction environments. In addition, the admixture has a low dosage, can significantly improve the early strength of shotcrete, and improves the final strength. It is suitable for the prevention and control of rock bursts in mines, water conservancy, tunnels, and subways, and the spraying of seepage tunnel sections, which can solve the spraying process that conventional shotcrete cannot complete in seepage tunnel sections.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to an ultra-high early strength sprayed concrete additive, a preparation method and application thereof.
Background
The sprayed concrete is a supporting structure material, and is sprayed to a rock surface by doping an accelerator through a mechanical arm, so that the sprayed concrete can be quickly solidified and formed into a layer of supporting structure, thereby playing a role in supporting the rock stratum and playing a role in protecting subsequent work, the most common silicate sprayed concrete has slow early strength growth speed, and the effects of timeliness, sealing and cohesiveness can not be truly exerted. Because for weak, loose and broken stratum tunnels, one working procedure circulation is kept within 24 hours, namely, the next blasting operation is needed within 0.5-4 hours after the sprayed concrete is sprayed, if the sprayed concrete is insufficient in strength, the surrounding rock cannot be timely sealed and reinforced, the self weight of the structure is increased, the primary supporting structure is settled and deformed under the actions of blasting vibration, construction disturbance additional load and the self weight of the structure, and is separated from the surrounding rock at the back to form cracks or hollows, so that the traction relaxation of the surrounding rock is induced, and difficulty is brought to the supporting of the surrounding rock. The 4h strength of the ordinary silicate sprayed concrete is only 0.86MPa, and the 24h strength is only 11.8MPa. The development of early strength of the sprayed concrete has a decisive effect on the support. Early strength development of shotcrete has a direct impact on excavation progress, with early strength of shotcrete being more important than final strength.
The crystal nucleus early strength agent is a novel early strength agent which can provide crystal nuclei required by early hydration of cement and promote precipitation of hydration products. With the wide application of the nano material, the agglomeration and precipitation of nano particles are easy to cause, the nano particles cannot exist stably for a long time, a certain difficulty is brought to the application of the crystal nucleus early strength agent, and the effect of improving the early strength is not obvious due to the fact that the nano material only has the effect of improving the early strength.
In view of the above, there is a need for a concrete admixture which is high in early stage strength, low in admixture amount, convenient to use, and high in post-strength, and is suitable for sprayed concrete.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an ultra-high early strength sprayed concrete additive, and a preparation method and application thereof, so as to at least achieve the effects of effectively improving the early strength of concrete and having low mixing amount.
The aim of the invention is realized by the following technical scheme:
an ultra-high early strength sprayed concrete additive comprises the following components: silica fume, a water reducing agent, a crystal nucleus early strength agent, modified ester, acrylic acid, a suspending agent, sodium carbonate, polyvinyl alcohol fibers and water.
Further, the components comprise, by weight: 190 parts of silica fume, 90-120 parts of water reducer, 350-500 parts of crystal nucleus early strength agent, 53 parts of modified ester, 10 parts of acrylic acid, 0.15-0.6 part of suspending agent, 5.5 parts of sodium carbonate, 4 parts of polyvinyl alcohol fiber and 152-438 parts of water.
Further, the granularity of the silica fume is 0.01-0.5 mu m.
Further, the preparation method of the modified ester comprises the following steps: grafting and modifying a carboxylic acid polymer with the molecular weight of 1000-2000 and polyethylene oxide with one end being alkoxy and the other end being hydroxyl or amino in a nonaqueous solvent; or modifying the polyene polyamine polymer, selecting acrylic acid 2-acrylamide-2-methylpropanesulfonic acid containing polar groups-COO-, -SO 3- and polyethylene glycol monoacrylate containing nonpolar groups-OH, -CH2CH 20-as reaction monomers, and grafting the reaction monomers on molecules containing NH 2 through Michael addition in aqueous solution.
Further, the modified ester comprises at least one of hydroxyethyl ester, hydroxypropyl ester, polyacrylamide, AMPS (2-acrylamide-2-methylpropanesulfonic acid) and a phosphate coupling agent.
Further, the suspending agent is sodium polyacrylate suspending agent;
Notably, sodium polyacrylate is commonly used in food suspending agents, and sodium polyacrylate can alter the electrical properties of particle surfaces, thereby reducing the interaction force between particles, avoiding agglomeration and precipitation between particles, and facilitating slurry stabilization.
Further, the crystal nucleus early strength agent is hydrated calcium silicate crystal nucleus early strength agent;
Preferably, the calcium silicate crystal nucleus early strength agent is S7000 liquid crystal seed early strength agent.
Further, the water reducing agent comprises at least one of methacrylic alcohol and polyoxyethylene ether.
Further, the preparation method of the additive comprises the following steps:
s1: mixing and stirring the water reducer and the crystal nucleus early strength agent uniformly at 54-56 ℃, then adding the silica fume, heating to 72-78 ℃, and stirring;
S2: adding the material obtained in the step S1 into the modified ester, the acrylic acid and water, and stirring;
S3: adding the material obtained in the step S2 into the suspending agent, and stirring;
s4: and (3) adding the sodium carbonate, the polyvinyl alcohol fibers and water into the material obtained in the step (S3), and keeping the temperature above 95 ℃ to obtain the concrete admixture.
It is noted that the components of the admixture of the present invention need to be added with temperature control, otherwise, some components may be lost, and the effect may be deteriorated.
Further, the using method of the additive comprises the following steps: the additive is added into the cementing material in an amount of 3% -6%.
Further, the using method further comprises the following steps: the admixture is directly mixed with the cementitious material.
Further, the admixture is used for shotcrete support.
Notably, are: the crystal nucleus early strength agent can promote the hydration process of early cement, improve the early strength of concrete, but does not influence the final strength; the suspending agent is pre-dispersed before the high-activity mineral powder is wrapped, so that the high-activity mineral after slow release can obtain sufficient reaction area, and the strength development rate of the concrete is accelerated; the polyvinyl alcohol fiber can improve the performances of tensile strength, bending resistance, freezing resistance, fatigue resistance and the like of the concrete; the sodium carbonate serves to adjust the pH; the sodium carbonate serves to adjust the pH; the water reducer can reduce the mixing water consumption under the condition of maintaining the slump constant of the concrete, improve the workability, increase the strength of the concrete and improve the durability; the modified ester and the acrylic acid are used as slump retaining agents for retaining the slump and activity of concrete; the water reducing agent can avoid the working performance of the sprayed concrete from being reduced and improve the pumpability.
The beneficial effects of the invention are as follows:
1. The mixing amount of the ultra-high early strength sprayed concrete additive is 3-6% of the mass of the cementing material, the early strength of sprayed concrete can be obviously improved, and the ultra-high early strength sprayed concrete additive is suitable for preventing and controlling rock burst of mines, water conservancy, tunnels and subways and spraying the water seepage hole sections, and can solve the problem that the conventional sprayed concrete cannot be sprayed in the water seepage hole sections.
2. The admixture of the invention is water aqua, has convenient use, reduces dust emission, has good pumpability and can be suitable for various construction environments.
3. The invention combines the early-strength agent of the crystal nucleus with the suspending agent, so that the early-strength agent not only has higher early-strength, but also obviously improves the later-strength, and the strength is increased by about one time.
Detailed Description
The technical scheme of the present invention is described in further detail below, but the scope of the present invention is not limited to the following.
The model and source of some of the reagents used in the examples below were as follows:
crystal nucleus early strength agent, model: liquid seed early strength agent S7000, brand: new sense synthesis, specification: 200 kg/barrel;
suspending agents, sodium polyacrylate, brand: new material of Shandong Ji Cheng, specification: 25 kg/bag;
ultrafine silica powder, brand: the grain size distribution of the De-blue chemical industry is mainly 0.01-0.5 mu m;
the preparation method of the ultra-high early strength concrete additive comprises the following specific steps:
1) Adding 50 parts of methallyl alcohol, 50 parts of polyoxyethylene ether, 350 parts of early-strength nucleating agent and 150 parts of water into a stirring kettle, mixing, stirring at a temperature of 55 ℃, adding 190 parts of silicon dioxide ultrafine powder and 5 parts of emulsifying agent after 30min, heating to 55 ℃, and continuing stirring for 90min;
2) 53 parts of polyacrylamide, 10 parts of acrylic acid and 10 parts of water are mixed to prepare a solution, the solution is added into a reaction kettle and stirred for 90min, and then 0.5 part of suspending agent is added and stirring is continued for 90min;
3) Mixing 5.5 parts of sodium carbonate, 4 parts of polyethylene pure fiber and 10 parts of water to prepare a solution, adding the solution into a reaction kettle, stirring for 90min, and controlling the temperature to be not lower than 95 ℃ in the stirring process to obtain suspension liquid which is the additive.
The preparation method of the ultra-high early strength concrete additive comprises the following specific steps:
1) Adding 60 parts of methallyl alcohol, 60 parts of polyoxyethylene ether, 400 parts of early-strength nucleating agent and 200 parts of water into a stirring kettle, mixing, stirring at a temperature of 55 ℃, adding 190 parts of silicon dioxide ultrafine powder and 5 parts of emulsifying agent after 30min, heating to 55 ℃, and continuously stirring for 90min;
2) 53 parts of polyacrylamide, 10 parts of acrylic acid and 10 parts of water are mixed to prepare a solution, the solution is added into a reaction kettle and stirred for 90min, and then 0.2 part of suspending agent is added and stirring is continued for 90min;
3) Mixing 5.5 parts of sodium carbonate, 4 parts of polyethylene pure fiber and 10 parts of water to prepare a solution, adding the solution into a reaction kettle, stirring for 90min, and controlling the temperature to be not lower than 95 ℃ in the stirring process to obtain suspension liquid which is the additive.
The preparation method of the ultra-high early strength concrete additive comprises the following specific steps:
1) Adding 80 parts of methallyl alcohol, 40 parts of polyoxyethylene ether, 500 parts of early-strength nucleating agent and 200 parts of water into a stirring kettle, mixing, stirring at a temperature of 55 ℃, adding 190 parts of silicon dioxide ultrafine powder and 5 parts of emulsifying agent after 30min, heating to 55 ℃, and continuing stirring for 90min;
2) 53 parts of polyacrylamide, 10 parts of acrylic acid and 10 parts of water are mixed to prepare a solution, the solution is added into a reaction kettle and stirred for 90min, and then 0.6 part of suspending agent is added and stirring is continued for 90min;
3) Mixing 5.5 parts of sodium carbonate, 4 parts of polyethylene pure fiber and 10 parts of water to prepare a solution, adding the solution into a reaction kettle, stirring for 90min, and controlling the temperature to be not lower than 95 ℃ in the stirring process to obtain suspension liquid which is the additive.
The preparation method of the ultra-high early strength concrete additive comprises the following specific steps:
1) Adding 100 parts of methallyl alcohol, 350 parts of early-strength nucleating agent and 150 parts of water into a stirring kettle, mixing, maintaining the temperature at 55 ℃, mixing and stirring for 30min, adding 190 parts of silicon dioxide ultrafine powder and 5 parts of emulsifying agent, heating to 55 ℃, and continuing stirring for 90min;
2) Mixing 53 parts of AMPS, 10 parts of acrylic acid and 10 parts of water to prepare a solution, adding the solution into a reaction kettle, stirring for 90min, then adding 0.5 part of suspending agent, and continuously stirring for 90min;
3) Mixing 5.5 parts of sodium carbonate, 4 parts of polyethylene pure fiber and 10 parts of water to prepare a solution, adding the solution into a reaction kettle, stirring for 90min, and controlling the temperature to be not lower than 95 ℃ in the stirring process to obtain suspension liquid which is the additive.
Comparative example 1
The preparation of the ultra-high early strength concrete admixture is different from the preparation of the embodiment 1 in that no crystal nucleus early strength agent is added, and the concrete method comprises the following steps:
1) Adding 50 parts of methallyl alcohol, 50 parts of polyoxyethylene ether and 150 parts of water into a stirring kettle, mixing, maintaining the temperature at 55 ℃, mixing and stirring for 30min, adding 190 parts of silicon dioxide ultrafine powder and 5 parts of emulsifying agent, heating to 55 ℃, and continuously stirring for 90min;
2) 53 parts of modified ester, 10 parts of acrylic acid and 10 parts of water are mixed to prepare a solution, the solution is added into a reaction kettle and stirred for 90min, and then 0.5 part of suspending agent is added and stirring is continued for 90min;
3) Mixing 5.5 parts of sodium carbonate, 4 parts of polyethylene pure fiber and 10 parts of water to prepare a solution, adding the solution into a reaction kettle, stirring for 90min, and controlling the temperature to be not lower than 95 ℃ in the stirring process to obtain suspension liquid which is the additive.
Comparative example 2
An ultra-high early strength concrete admixture was prepared, differing from example 1 in that no suspending agent was added, and the specific method was as follows:
1) Adding 50 parts of methallyl alcohol, 50 parts of polyoxyethylene ether, 350 parts of early-strength nucleating agent and 150 parts of water into a stirring kettle, mixing, stirring at a temperature of 55 ℃, adding 190 parts of silicon dioxide ultrafine powder and 5 parts of emulsifying agent after 30min, heating to 55 ℃, and continuing stirring for 90min;
2) 53 parts of polyacrylamide, 10 parts of acrylic acid and 10 parts of water are mixed to prepare a solution, and the solution is added into a reaction kettle and stirred for 90 minutes;
3) Mixing 5.5 parts of sodium carbonate, 4 parts of polyethylene pure fiber and 10 parts of water to prepare a solution, adding the solution into a reaction kettle, stirring for 90min, and controlling the temperature to be not lower than 95 ℃ in the stirring process to obtain suspension liquid which is the additive.
Comparative example 3
An ultra-high early strength concrete admixture was prepared, which was different from example 1 in that no nucleating early strength agent and no suspending agent were added, and the specific method was as follows:
1) Adding 50 parts of methallyl alcohol, 50 parts of polyoxyethylene ether and 300 parts of water into a stirring kettle, mixing, maintaining the temperature at 55 ℃, mixing and stirring for 30min, adding 190 parts of silicon dioxide ultrafine powder and 5 parts of emulsifying agent, heating to 55 ℃, and continuously stirring for 90min;
2) 53 parts of polyacrylamide, 10 parts of acrylic acid and 10 parts of water are mixed to prepare a solution, and the solution is added into a reaction kettle and stirred for 90 minutes;
3) Mixing 5.5 parts of sodium carbonate, 4 parts of polyethylene pure fiber and 10 parts of water to prepare a solution, adding the solution into a reaction kettle, stirring for 90min, and controlling the temperature to be not lower than 95 ℃ in the stirring process to obtain suspension liquid which is the additive.
Comparative example 4
The preparation of the ultra-high early strength concrete admixture is different from the preparation of the ultra-high early strength concrete admixture in the embodiment 1, and the concrete method comprises the following steps:
1) 50 parts of methallyl alcohol, 50 parts of polyoxyethylene ether, 350 parts of an early strength agent (triethanolamine early strength agent, brand: to Jinglong technology) and 150 parts of water are added into a stirring kettle to be mixed, the temperature is kept at 55 ℃, the mixture is stirred for 30 minutes, 190 parts of silicon dioxide ultrafine powder and 5 parts of emulsifying agent are added, and then the temperature is raised to 55 ℃ and the stirring is continued for 90 minutes;
2) 53 parts of polyacrylamide, 10 parts of acrylic acid and 10 parts of water are mixed to prepare a solution, the solution is added into a reaction kettle and stirred for 90min, and then 0.5 part of suspending agent is added and stirring is continued for 90min;
3) Mixing 5.5 parts of sodium carbonate, 4 parts of polyethylene pure fiber and 10 parts of water to prepare a solution, adding the solution into a reaction kettle, stirring for 90min, and controlling the temperature to be not lower than 95 ℃ in the stirring process to obtain suspension liquid which is the additive.
Comparative example 5
The preparation of an ultra-high early strength concrete admixture differs from example 1 in the type of suspending agent used, and is carried out as follows:
1) Adding 50 parts of methallyl alcohol, 50 parts of polyoxyethylene ether, 350 parts of early strength agent and 150 parts of water into a stirring kettle, mixing, stirring at a temperature of 55 ℃, adding 190 parts of silicon dioxide ultrafine powder and 5 parts of emulsifier after 30min, heating to 55 ℃, and continuing stirring for 90min;
2) 53 parts of polyacrylamide, 10 parts of acrylic acid and 10 parts of water are mixed to prepare a solution, the solution is added into a reaction kettle and stirred for 90min, and then 0.5 part of an XY600 suspending agent (suspending agent XY-600, brand: new sense synthesis, specification: 20 kg/bag. The suspending agent is water-soluble biopolymer, has pseudoplasticity and shear thinning rheological property, and can improve slurry stability. ) Stirring is continued for 90min;
3) Mixing 5.5 parts of sodium carbonate, 4 parts of polyethylene pure fiber and 10 parts of water to prepare a solution, adding the solution into a reaction kettle, stirring for 90min, and controlling the temperature to be not lower than 95 ℃ in the stirring process to obtain suspension liquid which is the additive.
Experimental example 1
3 Kinds of cement, sand, broken stone and water with the additive of the embodiment 1 are mixed uniformly according to the proportion and then are combined with an accelerator for use in the implementation process of sprayed concrete. The content of the additive accounts for 5% of the total weight of the cementing material (cement) for the concrete, and the specific formulation ratio is shown in table 1:
TABLE 1
Taking concrete (according to a mixing ratio 1) added with the existing early strength agent (brand: morning through environmental protection) as a control group, performing performance detection on the sprayed concrete added with the ultra-high early strength sprayed concrete admixture, wherein the detection content and the detection method are as follows, and the detection results are shown in tables 2-3:
and (3) detecting the quick setting property, referring to Q/CR807 2020 'liquid alkali-free quick setting agent for tunnel sprayed concrete', wherein the strength of mortar for 6h is more than or equal to 1MPa, and meanwhile, chloride ions in the liquid alkali-free quick setting agent are less than or equal to 0.05 percent, and the alkali content is less than or equal to 1 percent.
Ultra-high early strength sprayed concrete admixture detection, and tackifier detection in "concrete admixture" GB8076 2008, "concrete admixture homogeneity test method" GB8077 2012 and TB10424-2018 "railway concrete engineering construction quality acceptance Standard".
TABLE 2
TABLE 3 Table 3
As can be seen, the adhesive force of the sprayed concrete can reach more than 3.2MPa, the one-time spraying thickness can reach 0.5m, the rebound rate is reduced, and the rebound rate of the sprayed concrete arch part can be controlled to be about 5%.
Experimental example 2
The additives of examples 1-4 and comparative examples 1-3 were mixed with cement, sand, crushed stone and water (according to the ratio 1) in an amount of 5% and then used in combination with accelerator for the concrete spraying process. The performance of the sprayed concrete added with the ultra-high early strength sprayed concrete additive is detected, the detection content and the detection method are the same as those of the experimental example 1, and the detection results are shown in tables 4-5
TABLE 4 Table 4
TABLE 5
From the experimental data, the early strength of the concrete is obviously improved and the later strength is also obviously improved under the condition that the crystal nucleus early strength agent and the suspending agent are added at the same time, so that the addition of the crystal nucleus early strength agent and the suspending agent not only quickens the speed of increasing the early strength but also increases the later strength.
The foregoing is merely a preferred embodiment of the invention, and it is to be understood that the invention is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411106207.7A CN118637855B (en) | 2024-08-13 | 2024-08-13 | Super high early strength shotcrete admixture and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411106207.7A CN118637855B (en) | 2024-08-13 | 2024-08-13 | Super high early strength shotcrete admixture and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118637855A CN118637855A (en) | 2024-09-13 |
| CN118637855B true CN118637855B (en) | 2024-11-19 |
Family
ID=92661104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411106207.7A Active CN118637855B (en) | 2024-08-13 | 2024-08-13 | Super high early strength shotcrete admixture and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118637855B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101508553A (en) * | 2009-03-27 | 2009-08-19 | 徐东亮 | Light energy conservation insulating concrete |
| CN114014991A (en) * | 2021-10-29 | 2022-02-08 | 四川华西绿舍建材有限公司 | A kind of calcium silicate hydrate crystal nucleus early strength type polycarboxylate water reducing agent and preparation method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5192366A (en) * | 1989-12-05 | 1993-03-09 | Denki Kagaku Koygo Kabushiki Kaisha | Cement admixture and cement composition |
| CN104108899A (en) * | 2014-06-25 | 2014-10-22 | 芜湖市三兴混凝土外加剂有限公司 | Early-strength water reducer |
| CN112661434A (en) * | 2021-01-19 | 2021-04-16 | 武汉新绿博恩科技有限公司 | Water reducing agent composition for steam-curing-free concrete and preparation method thereof |
| CN114436589B (en) * | 2022-01-24 | 2023-05-05 | 东方雨虹砂粉科技集团有限公司 | Mortar composition and preparation method thereof |
-
2024
- 2024-08-13 CN CN202411106207.7A patent/CN118637855B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101508553A (en) * | 2009-03-27 | 2009-08-19 | 徐东亮 | Light energy conservation insulating concrete |
| CN114014991A (en) * | 2021-10-29 | 2022-02-08 | 四川华西绿舍建材有限公司 | A kind of calcium silicate hydrate crystal nucleus early strength type polycarboxylate water reducing agent and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118637855A (en) | 2024-09-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6457523B1 (en) | Delayed thixotropic cement compositions and methods | |
| CN112897966B (en) | Calcium carbonate-based inorganic coating and preparation and use methods thereof | |
| CN110255955B (en) | Alkali-free liquid accelerator and preparation method and application thereof | |
| CN115180913B (en) | An expandable full tailings filling material for top filling in mine goaf | |
| CN115893895A (en) | Coagulation accelerating early strength agent, preparation method thereof and concrete composition | |
| CN112047666A (en) | Alkali-activated blast furnace ferronickel slag sprayed concrete | |
| CN117263564A (en) | Early-strength liquid admixture for sprayed concrete and preparation method thereof | |
| CN111925149A (en) | Composite additive for sprayed concrete | |
| CN115490485B (en) | A kind of low-carbon downhole filling material and preparation method thereof | |
| CN115583827B (en) | Plastic early-strength type synchronous grouting material for shield tunnel and preparation method thereof | |
| CN118637855B (en) | Super high early strength shotcrete admixture and preparation method and application thereof | |
| CN113998915A (en) | A kind of liquid alkali-free accelerator and preparation method thereof | |
| CN114920890B (en) | Viscosity-reducing additive and preparation method and application thereof | |
| CN116903290A (en) | High-water-retention type polycarboxylic acid high-performance water reducer and preparation method thereof | |
| CN116768524A (en) | A kind of nano-rebound inhibitor, its preparation method and its application in shotcrete | |
| CN115259709A (en) | Modified glass bead and preparation method thereof, coagulation-accelerating early strength agent and preparation method thereof | |
| CN112661436B (en) | Machine-made sand concrete bleeding inhibitor and application method thereof | |
| CN120004540B (en) | Rebound inhibitor for high-early-strength low-rebound sprayed concrete and preparation method and application thereof | |
| CN113173727A (en) | Novel environment-friendly liquid alkali-free cement accelerator | |
| CN114716175B (en) | Accelerating agent and preparation method and application thereof | |
| CN115557723B (en) | Calcium silicate salt seed crystal colloid and preparation method thereof | |
| CN110713190A (en) | Sulfur-free, fluorine-free and alkali-free liquid accelerator and preparation method thereof | |
| CN115448637B (en) | Composite water reducer and preparation method and application thereof | |
| CN112876160B (en) | Anchor rod grouting material for deep foundation pit construction and preparation method thereof | |
| CN114920484B (en) | Slurry-rich sand-reducing rate type polycarboxylate superplasticizer and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |