CN107915459B - Soil stabilizer - Google Patents
Soil stabilizer Download PDFInfo
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- CN107915459B CN107915459B CN201711246685.8A CN201711246685A CN107915459B CN 107915459 B CN107915459 B CN 107915459B CN 201711246685 A CN201711246685 A CN 201711246685A CN 107915459 B CN107915459 B CN 107915459B
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- 239000003583 soil stabilizing agent Substances 0.000 title claims abstract description 24
- 239000004567 concrete Substances 0.000 claims abstract description 63
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000002699 waste material Substances 0.000 claims abstract description 54
- 239000000843 powder Substances 0.000 claims abstract description 47
- 238000002156 mixing Methods 0.000 claims abstract description 41
- 238000003756 stirring Methods 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 21
- 235000010410 calcium alginate Nutrition 0.000 claims abstract description 21
- 239000000648 calcium alginate Substances 0.000 claims abstract description 21
- 229960002681 calcium alginate Drugs 0.000 claims abstract description 21
- OKHHGHGGPDJQHR-YMOPUZKJSA-L calcium;(2s,3s,4s,5s,6r)-6-[(2r,3s,4r,5s,6r)-2-carboxy-6-[(2r,3s,4r,5s,6r)-2-carboxylato-4,5,6-trihydroxyoxan-3-yl]oxy-4,5-dihydroxyoxan-3-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylate Chemical compound [Ca+2].O[C@@H]1[C@H](O)[C@H](O)O[C@@H](C([O-])=O)[C@H]1O[C@H]1[C@@H](O)[C@@H](O)[C@H](O[C@H]2[C@H]([C@@H](O)[C@H](O)[C@H](O2)C([O-])=O)O)[C@H](C(O)=O)O1 OKHHGHGGPDJQHR-YMOPUZKJSA-L 0.000 claims abstract description 21
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 21
- 239000005011 phenolic resin Substances 0.000 claims abstract description 20
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 16
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 16
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 16
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 13
- 239000011259 mixed solution Substances 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 239000012047 saturated solution Substances 0.000 claims abstract description 10
- 238000001354 calcination Methods 0.000 claims abstract description 8
- 235000010489 acacia gum Nutrition 0.000 claims abstract description 7
- 239000001785 acacia senegal l. willd gum Substances 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 239000010881 fly ash Substances 0.000 claims abstract description 7
- 239000010440 gypsum Substances 0.000 claims abstract description 7
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 7
- 239000000243 solution Substances 0.000 claims abstract description 7
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 5
- 239000012188 paraffin wax Substances 0.000 claims abstract description 4
- 238000000498 ball milling Methods 0.000 claims abstract description 3
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 16
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 230000008961 swelling Effects 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 229920005552 sodium lignosulfonate Polymers 0.000 claims description 4
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims description 2
- QOHMWDJIBGVPIF-UHFFFAOYSA-N n',n'-diethylpropane-1,3-diamine Chemical compound CCN(CC)CCCN QOHMWDJIBGVPIF-UHFFFAOYSA-N 0.000 claims description 2
- 229960001124 trientine Drugs 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 27
- 239000004566 building material Substances 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 description 46
- 239000004568 cement Substances 0.000 description 37
- 239000010410 layer Substances 0.000 description 11
- 239000002245 particle Substances 0.000 description 10
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 8
- 239000007822 coupling agent Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000000378 calcium silicate Substances 0.000 description 5
- 229910052918 calcium silicate Inorganic materials 0.000 description 5
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000009991 scouring Methods 0.000 description 4
- 239000002344 surface layer Substances 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 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
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 3
- 150000001721 carbon Chemical class 0.000 description 3
- 229960004424 carbon dioxide Drugs 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000011268 mixed slurry Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229910052604 silicate mineral Inorganic materials 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N dodecane Chemical group CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- ISXSFOPKZQZDAO-UHFFFAOYSA-N formaldehyde;sodium Chemical group [Na].O=C ISXSFOPKZQZDAO-UHFFFAOYSA-N 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
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- 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
- C04B28/14—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 calcium sulfate 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/12—Multiple coating or impregnating
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
-
- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Carbon And Carbon Compounds (AREA)
- Water Treatment By Sorption (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a soil stabilizer, belonging to the technical field of building materials. The method comprises the steps of crushing waste concrete to obtain waste concrete powder; stirring and mixing the waste concrete powder and the calcium alginate solution, and filtering to obtain pretreated waste concrete powder; stirring and mixing activated carbon and a calcium hydroxide saturated solution to obtain a mixed solution, introducing carbon dioxide into the mixed solution, filtering to obtain filter residue, stirring and mixing the obtained filter residue and tetraethoxysilane, filtering, reacting at a high temperature to obtain pretreated coated activated carbon, and ball-milling and mixing the pretreated coated activated carbon and paraffin to obtain modified coated activated carbon; calcining the pretreated waste concrete powder, and cooling to obtain modified waste concrete; stirring and mixing gypsum powder, fly ash, calcined waste concrete, phenolic resin, Arabic gum, water, modified coated activated carbon, a curing agent and a water reducing agent to obtain the soil stabilizer. The soil stabilizer prepared by the technical scheme of the invention has the characteristic of improving the soil strength.
Description
Technical Field
The invention relates to a soil stabilizer, belonging to the technical field of building materials.
Background
The semi-rigid base material has wide material source, low cost, high strength, high rigidity, high stability and high anti-scouring capacity, and is used as the main bearing function of the pavement structure. However, semi-rigid materials have the disadvantages of low deformation resistance, high brittleness, and easy cracking under the change of humidity or temperature, and if excessive water loss or too low temperature occurs during construction, micro cracks or macro cracks are generated in the base layer, and after the surface layer is paved, the cracks in the base layer are developed upwards to form reflection cracks under the repeated action of temperature and vehicle load. The semi-rigid base layer material can fully exert the advantages of the semi-rigid base layer material only on the premise of ensuring the structural integrity of the semi-rigid base layer material, once cracks (drying shrinkage, temperature shrinkage and load fatigue cracking) are generated in the base layer, the semi-rigid base layer loses the structural integrity and the continuity of the semi-rigid base layer, and further, under the combined action of factors such as vehicle load, road surface rainwater infiltration, environment temperature alternate change and the like, the cracks are further expanded, transverse cracks, longitudinal cracks and even local net cracks are gradually developed, and structural damage is finally generated. Scouring forms plate bottom void, crushing and even degrading into granule base layer.
① the dry shrinkage coefficient, dry shrinkage strain and temperature shrinkage coefficient of cement stabilized soil are obviously greater than those of cement stabilized gravel and cement stabilized macadam, serious shrinkage crack is easy to generate and affect asphalt surface layer, ② before the strength is not fully formed, if water permeates from the surface, the cement stabilized soil mixture is easy to soften, even a softening layer of a few millimeters can cause cracking damage of the asphalt surface layer, ③ the anti-scouring capability of the cement stabilized soil is obviously smaller than that of the cement stabilized cement, once surface water permeates into the base layer from the surface layer, scouring phenomenon is easy to generate.
Therefore, how to improve the defect that the traditional soil stabilizer has poor effect of improving the strength of the stabilized soil so as to obtain the soil stabilizer with higher comprehensive performance is a problem to be urgently solved by popularization and application of the soil stabilizer and meeting the industrial production requirement.
Disclosure of Invention
The invention mainly solves the technical problems that: aiming at the defect that the traditional soil stabilizer has poor effect of improving the strength of stabilized soil, the soil stabilizer is provided.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a soil stabilizer is composed of the following raw materials in parts by weight: 20-30 parts of gypsum powder, 10-20 parts of fly ash, 40-50 parts of modified waste concrete, 20-30 parts of phenolic resin, 20-30 parts of Arabic gum, 60-80 parts of water, 20-30 parts of modified coated activated carbon, 5-6 parts of a curing agent, 5-6 parts of a water reducing agent and 10-20 parts of a silane coupling agent;
the preparation process of the soil stabilizer comprises the following steps: weighing the raw materials according to the composition of the raw materials, and stirring and mixing gypsum powder, fly ash, modified waste concrete, phenolic resin, Arabic gum, water, modified coated activated carbon, a curing agent, a water reducing agent and a silane coupling agent to obtain the soil stabilizer.
The preparation process of the modified waste concrete comprises the following steps: crushing the waste concrete to obtain waste concrete powder; mixing waste concrete powder and calcium alginate solution according to a mass ratio of 1: 30-1: 50, stirring, mixing and filtering to obtain pretreated waste concrete powder; calcining the pretreated waste concrete powder, and cooling to obtain modified waste concrete; the preparation process of the calcium alginate liquid comprises the following steps: mixing calcium alginate with water according to a mass ratio of 1: 50-1: 100, mixing, standing, swelling, heating, stirring and mixing to obtain the calcium alginate solution.
The phenolic resin is any one of phenolic resin 2123, phenolic resin 2130 or phenolic resin 2127.
The modification process of the modified coated active carbon comprises the following steps: mixing activated carbon and a calcium hydroxide saturated solution according to a mass ratio of 1: 50-1: 100 to obtain a mixed solution, introducing carbon dioxide into the mixed solution, filtering to obtain filter residue, and mixing the obtained filter residue with ethyl orthosilicate according to a mass ratio of 1: 10-1: 20, stirring and mixing, filtering, reacting at high temperature to obtain pretreated coated activated carbon, and mixing the pretreated coated activated carbon with paraffin according to a mass ratio of 1: 5-1: 10, ball milling and mixing to obtain modified coated active carbon; the calcium hydroxide saturated solution is a calcium hydroxide saturated solution with the temperature of 20-22 ℃.
The curing agent is any one of dihexyltriamine, diethylaminopropylamine or triethylene tetramine.
The water reducing agent is any one of sodium lignosulphonate, a TH-928 polycarboxylic acid water reducing agent or a YZ-1 naphthalene high-efficiency water reducing agent.
The silane coupling agent is any one of a silane coupling agent KH-550, a silane coupling agent KH-560 or a silane coupling agent KH-570.
The invention has the beneficial effects that:
(1) according to the invention, by adding the modified waste concrete, calcium carbonate in the waste concrete reacts to generate calcium oxide in the calcining process, the calcium oxide can react with water to generate calcium hydroxide, then the calcium hydroxide reacts with minerals in soil to generate calcium silicate and calcium aluminate, part of water molecules in soil and water molecules generated by the reaction are absorbed into calcium silicate and calcium aluminate crystal frameworks of the water molecules and the minerals, calcium silicate is generated by the surface chemical reaction of soil particles, and unreacted soil particles can be wrapped by the calcium silicate and are synthesized with adjacent soil particles into a whole, so that the soil strength is obviously improved;
(2) the invention adds modified coated active carbon, firstly, depositing calcium carbonate in the active carbon, then soaking by tetraethoxysilane, reacting water on the surface of the active carbon with tetraethoxysilane to generate silicon dioxide, on one hand, the hydration reaction in the system is promoted to be more sufficient, the compression strength of the system is improved, on the other hand, the silicon dioxide is used as a support body to avoid the modified coated active carbon from being cracked in advance, in the using process, calcium oxide in the modified coated active carbon reacts with water to generate a large amount of calcium hydroxide gelled particles, the specific surface area of the calcium hydroxide gelled particles is larger than that of soil particles, the specific surface area is large, the adsorption activity is very strong, the aggregation effect of the soil particles is promoted, and the pores among the soil particle aggregates are sealed, thereby forming a firm aggregate structure, the strength of the soil is improved, and secondly, the calcium hydroxide is in close contact with silicate minerals in the soil, the silicate mineral is dissociated under the excitation of alkaline conditions and chemically reacts with calcium hydroxide under the participation of water to generate calcium silicate and calcium aluminate, and the two cementing materials with good water stability wrap unreacted soil particles and are integrated with adjacent soil particles, so that the strength of the soil is further enhanced.
Detailed Description
Adding calcium alginate and water into a single-neck flask according to a mass ratio of 1: 50-1: 100, stirring and mixing for 20-30 min by using a glass rod, standing and swelling for 3-4 h, moving the single-neck flask into a digital readout speed measurement constant-temperature magnetic stirrer, heating, stirring and dissolving for 40-50 min under the conditions that the temperature is 95-100 ℃ and the rotating speed is 400-500 r/min to obtain calcium alginate liquid, placing waste concrete into a ball mill, crushing to obtain waste concrete powder, placing the waste concrete powder and the calcium alginate liquid into a No. 1 beaker according to a mass ratio of 1: 30-1: 50, stirring and mixing for 30-50 min under the condition that the rotating speed is 100-200 r/min to obtain concrete powder mixed liquid, filtering the concrete powder mixed liquid to obtain pretreated waste concrete powder, placing the pretreated waste concrete powder into a muffle furnace, calcining for 1-2 h under the condition that the rotating speed is 100-200 r/min, cooling to room temperature to obtain modified concrete, mixing the modified cement, placing the modified cement powder and the modified cement into a carbolic acid formaldehyde resin into a carbolic acid coupling cement slurry, placing the modified cement slurry into a carbolic acid coupling agent into a carbolic resin, stirring furnace, placing the modified cement slurry, stirring slurry, placing the modified cement slurry into a carbolic acid slurry, stirring slurry, placing the slurry, stirring slurry, placing the slurry, stirring slurry, the slurry.
Example 1
Adding calcium alginate and water into a single-neck flask according to the mass ratio of 1: 100, stirring and mixing for 30min by using a glass rod, standing and swelling for 4h, moving the single-neck flask into a digital display speed measurement constant-temperature magnetic stirrer, heating, stirring and dissolving for 50min under the conditions of the temperature of 100 ℃ and the rotation speed of 500r/min to obtain calcium alginate liquid, crushing waste concrete in a ball mill to obtain waste concrete powder, placing the waste concrete powder and the calcium alginate liquid in a No. 1 beaker according to the mass ratio of 1: 50, stirring and mixing for 50min under the condition of the rotation speed of 200r/min to obtain concrete powder mixed liquid, filtering the concrete powder mixed liquid to obtain pretreated waste concrete powder, placing the pretreated waste concrete powder in a muffle furnace, calcining for 2h under the condition of the temperature of 900 ℃, cooling to the room temperature to obtain waste concrete, filtering the waste concrete powder mixed liquid, placing the activated carbon and calcium hydroxide saturated solution in a No. 2 beaker, placing the pretreated waste concrete powder in a No. 2 beaker at the rotation speed of 300 ℃ for 2h, stirring for 2h, placing the furnace to obtain modified cement slurry, adding the modified cement slurry into a modified carbon dioxide slurry, adding the modified carbon into a modified cement slurry, stirring and stirring for reaction, adding the modified cement slurry into a modified cement slurry, adding the slurry obtained by adding the modified cement slurry into a modified cement slurry obtained by adding the modified cement slurry into a modified cement slurry obtained by adding the modified cement slurry obtained by adding the slurry into a modified cement slurry obtained by adding the modified cement slurry into a modified cement slurry obtained by adding the modified cement slurry.
Example 2
Placing activated carbon and a calcium hydroxide saturated solution in a No. 2 beaker according to a mass ratio of 1: 100, stirring and mixing for 50min under the condition that the rotating speed is 300r/min to obtain a mixed solution, continuously introducing carbon dioxide into the mixed solution until no precipitate appears in the mixed solution, filtering the mixed solution into which the carbon dioxide is introduced to obtain filter residue, placing the obtained filter residue and tetraethoxysilane in a No. 3 beaker according to a mass ratio of 1: 20, stirring and mixing for 20min under the condition that the rotating speed is 400r/min to obtain mixed slurry, filtering the mixed slurry to obtain coated activated carbon, placing the coated activated carbon in a tubular furnace, filling nitrogen into the furnace at a speed of 90m L/min, reacting for 3h at a high temperature of 900 ℃ to obtain pretreated coated activated carbon, placing the pretreated coated activated carbon and paraffin in a ball mill according to a mass ratio of 1: 10 to obtain the coated activated carbon, mixing the ball mill with the pretreated coated activated carbon to obtain the coated activated carbon, placing 30 parts by weight of gypsum powder, 20 parts of fly ash, 30 parts of phenolic resin, 30 parts of Arabic gum, 80 parts of water, 30 parts of modified activated carbon, 6 parts of a stabilizer, 6 min of a silane coupling agent, and a phenol formaldehyde resin coupling agent under the condition that the rotating speed is 550-50 ℃ and the phenolic resin coupling agent is sodium hydroxide coupling agent, and the phenolic resin coupling agent is sodium formaldehyde curing agent is sodium lignosulphonate coupling agent, and the phenolic resin coupling agent is 50-50.
Example 3
Adding calcium alginate and water into a single-neck flask according to the mass ratio of 1: 100, stirring and mixing for 30min by using a glass rod, standing and swelling for 4h, moving the single-neck flask into a digital display speed measurement constant-temperature magnetic stirrer, heating, stirring and dissolving for 50min under the conditions of the temperature of 100 ℃ and the rotation speed of 500r/min to obtain calcium alginate liquid, crushing waste concrete in a ball mill to obtain waste concrete powder, placing the waste concrete powder and the calcium alginate liquid in a No. 1 beaker according to the mass ratio of 1: 50, stirring and mixing for 50min under the condition of the rotation speed of 200r/min to obtain concrete powder mixed liquid, filtering the concrete powder mixed liquid to obtain pretreated waste concrete powder, placing the pretreated waste concrete powder in a muffle furnace, calcining for 2h under the temperature of 900 ℃, cooling to room temperature to obtain waste concrete, placing the activated carbon and calcium hydroxide saturated solution in a No. 2 beaker, placing the pretreated waste concrete powder in a muffle furnace at the rotation speed of 300 ℃ for 2h, stirring for 2h, placing the furnace to obtain modified cement slurry, placing the modified cement slurry which is coated with modified carbon dioxide in a modified carbon, placing the slurry which is coated with the modified carbon in a modified carbon dioxide slurry, and adding the slurry which is coated with the modified carbon dioxide slurry, stirring and is coated with the slurry of modified cement, stirring for 20min, and reacting, and the slurry of modified cement, and the slurry of 20 parts of modified cement, and the slurry coated with the slurry of the modified cement, adding the modified cement, the slurry of the modified cement, the slurry of modified cement, the slurry of 20, the slurry of 20, the slurry of 20, the slurry.
Example 4
Mixing calcium alginate with water according to a mass ratio of 1: 100, adding the mixture into a single-neck flask, stirring and mixing the mixture by using a glass rod for 30min, standing and swelling the mixture for 4h, moving the single-neck flask into a digital display speed measurement constant-temperature magnetic stirrer, and heating, stirring and dissolving the mixture for 50min at the temperature of 100 ℃ and the rotating speed of 500r/min to obtain calcium alginate solution; putting the waste concrete into a ball mill for crushing to obtain waste concrete powder; mixing waste concrete powder and calcium alginate solution according to a mass ratio of 1: 50, placing the mixture into a No. 1 beaker, stirring and mixing the mixture for 50min at the rotating speed of 200r/min to obtain a concrete powder mixed solution, and then filtering the concrete powder mixed solution to obtain pretreated waste concrete powder; placing the pretreated waste concrete powder in a muffle furnace, calcining for 2 hours at the temperature of 900 ℃, and cooling to room temperature along with the furnace to obtain modified waste concrete; according to the weight portion, 30 portions of gypsum powder, 20 portions of fly ash, 50 portions of modified waste concrete, 30 portions of phenolic resin, 30 portions of Arabic gum, 80 portions of water, 6 portions of curing agent, 6 portions of water reducing agent and 20 portions of silane coupling agent are placed in a mixer, and are stirred and mixed for 50min under the condition that the rotating speed is 200r/min, so that the soil stabilizer is obtained. The phenolic resin is phenolic resin 2123. The curing agent is dihexyl triamine. The water reducing agent is sodium lignosulphonate. The silane coupling agent is a silane coupling agent KH-550.
Comparative example: a soil stabilizer produced by Shaoyang chemical industry Co.
The soil stabilizers and comparative products obtained in examples 1 to 4 were tested for their performance by the following methods:
soil body strength: detecting the unconfined compressive strength of the soil body after the test piece is used according to GB/T50123; the soil for the test is common Sichuan soil in Nanjing area, and has the following engineering properties: liquid limit WL=34.2%, plasticity index Ip=17.3, optimum water content Wop=15.4%, maximum dry density dd=1.71g/cm3。
Specific detection results are shown in table 1:
TABLE 1
As can be seen from the detection results in Table 1, the soil stabilizer prepared by the technical scheme of the invention has the characteristic of improving the soil strength and has wide prospects in the development of the soil improvement industry.
Claims (5)
1. A soil stabilizer characterized by: the composite material is prepared from the following raw materials in parts by weight: 20-30 parts of gypsum powder, 10-20 parts of fly ash, 40-50 parts of modified waste concrete, 20-30 parts of phenolic resin, 20-30 parts of Arabic gum, 60-80 parts of water, 20-30 parts of modified coated activated carbon, 5-6 parts of a curing agent, 5-6 parts of a water reducing agent and 10-20 parts of a silane coupling agent;
the preparation process of the modified waste concrete comprises the following steps: crushing the waste concrete to obtain waste concrete powder; mixing waste concrete powder and calcium alginate solution according to a mass ratio of 1: 30-1: 50, stirring, mixing and filtering to obtain pretreated waste concrete powder; calcining the pretreated waste concrete powder, and cooling to obtain modified waste concrete; the preparation process of the calcium alginate liquid comprises the following steps: mixing calcium alginate with water according to a mass ratio of 1: 50-1: 100, mixing, standing, swelling, heating, stirring and mixing to obtain calcium alginate solution;
the modification process of the modified coated active carbon comprises the following steps: mixing activated carbon and a calcium hydroxide saturated solution according to a mass ratio of 1: 50-1: 100 to obtain a mixed solution, introducing carbon dioxide into the mixed solution, filtering to obtain filter residue, and mixing the obtained filter residue with ethyl orthosilicate according to a mass ratio of 1: 10-1: 20, stirring and mixing, filtering, reacting at high temperature to obtain pretreated coated activated carbon, and mixing the pretreated coated activated carbon with paraffin according to a mass ratio of 1: 5-1: 10, ball milling and mixing to obtain modified coated active carbon; the calcium hydroxide saturated solution is a calcium hydroxide saturated solution with the temperature of 20-22 ℃;
the preparation process of the soil stabilizer comprises the following steps: weighing the raw materials according to the composition of the raw materials, and stirring and mixing gypsum powder, fly ash, modified waste concrete, phenolic resin, Arabic gum, water, modified coated activated carbon, a curing agent, a water reducing agent and a silane coupling agent to obtain the soil stabilizer.
2. The soil stabilizer of claim 1, wherein: the phenolic resin is any one of phenolic resin 2123, phenolic resin 2130 or phenolic resin 2127.
3. The soil stabilizer of claim 1, wherein: the curing agent is any one of dihexyltriamine, diethylaminopropylamine or triethylene tetramine.
4. The soil stabilizer of claim 1, wherein: the water reducing agent is any one of sodium lignosulphonate, a TH-928 polycarboxylic acid water reducing agent or a YZ-1 naphthalene high-efficiency water reducing agent.
5. The soil stabilizer of claim 1, wherein: the silane coupling agent is any one of a silane coupling agent KH-550, a silane coupling agent KH-560 or a silane coupling agent KH-570.
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| CN101219881A (en) * | 2007-01-08 | 2008-07-16 | 任兆磊 | Phosphogypsum composite material |
| CN103864391A (en) * | 2014-01-16 | 2014-06-18 | 刘洪军 | Efficient soil stabilizer |
| CN104927875A (en) * | 2015-06-30 | 2015-09-23 | 青岛麦科三维高新技术有限公司 | Soil stabilizer |
| CN105524620A (en) * | 2015-12-29 | 2016-04-27 | 吕贵松 | A novel soil stabilizer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219881A (en) * | 2007-01-08 | 2008-07-16 | 任兆磊 | Phosphogypsum composite material |
| CN103864391A (en) * | 2014-01-16 | 2014-06-18 | 刘洪军 | Efficient soil stabilizer |
| CN104927875A (en) * | 2015-06-30 | 2015-09-23 | 青岛麦科三维高新技术有限公司 | Soil stabilizer |
| CN105524620A (en) * | 2015-12-29 | 2016-04-27 | 吕贵松 | A novel soil stabilizer |
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