CN116874243A - Mixed slurry for treating foundation and preparation method thereof - Google Patents
Mixed slurry for treating foundation and preparation method thereof Download PDFInfo
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- CN116874243A CN116874243A CN202310891497.XA CN202310891497A CN116874243A CN 116874243 A CN116874243 A CN 116874243A CN 202310891497 A CN202310891497 A CN 202310891497A CN 116874243 A CN116874243 A CN 116874243A
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- 239000011268 mixed slurry Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 96
- 239000010881 fly ash Substances 0.000 claims abstract description 67
- 239000004568 cement Substances 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000010456 wollastonite Substances 0.000 claims abstract description 32
- 229910052882 wollastonite Inorganic materials 0.000 claims abstract description 32
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 30
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 30
- 239000004571 lime Substances 0.000 claims abstract description 30
- 239000000440 bentonite Substances 0.000 claims abstract description 29
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 29
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000002893 slag Substances 0.000 claims abstract description 29
- 239000002002 slurry Substances 0.000 claims abstract description 23
- 229920002907 Guar gum Polymers 0.000 claims abstract description 22
- 239000000665 guar gum Substances 0.000 claims abstract description 22
- 229960002154 guar gum Drugs 0.000 claims abstract description 22
- 235000010417 guar gum Nutrition 0.000 claims abstract description 22
- XYRAEZLPSATLHH-UHFFFAOYSA-N trisodium methoxy(trioxido)silane Chemical compound [Na+].[Na+].[Na+].CO[Si]([O-])([O-])[O-] XYRAEZLPSATLHH-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 17
- 239000002131 composite material Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims description 40
- 150000002500 ions Chemical class 0.000 claims description 27
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 23
- 239000013078 crystal Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 20
- 239000003469 silicate cement Substances 0.000 claims description 18
- 235000015099 wheat brans Nutrition 0.000 claims description 17
- 238000007873 sieving Methods 0.000 claims description 16
- 239000000243 solution Substances 0.000 claims description 16
- 238000005303 weighing Methods 0.000 claims description 16
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 14
- 235000012216 bentonite Nutrition 0.000 claims description 13
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 12
- 239000004698 Polyethylene Substances 0.000 claims description 11
- -1 polyethylene Polymers 0.000 claims description 11
- 229920000573 polyethylene Polymers 0.000 claims description 11
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 10
- 229920003043 Cellulose fiber Polymers 0.000 claims description 9
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 150000001450 anions Chemical class 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 239000008030 superplasticizer Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000011398 Portland cement Substances 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000001291 vacuum drying Methods 0.000 claims description 3
- CAQWNKXTMBFBGI-UHFFFAOYSA-N C.[Na] Chemical compound C.[Na] CAQWNKXTMBFBGI-UHFFFAOYSA-N 0.000 claims 1
- 239000004115 Sodium Silicate Substances 0.000 claims 1
- 229910052911 sodium silicate Inorganic materials 0.000 claims 1
- 241000196324 Embryophyta Species 0.000 abstract description 2
- 239000002253 acid Substances 0.000 abstract description 2
- 239000003513 alkali Substances 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 5
- 239000002689 soil Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000010412 perfusion Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002052 molecular layer Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 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
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
-
- 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
- C04B24/38—Polysaccharides or derivatives thereof
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- 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
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- 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)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of building engineering materials, and discloses a mixed slurry for treating a foundation and a preparation method thereof, wherein the mixed slurry for treating the foundation consists of, by mass, 30-35 parts of cement, 15-20 parts of modified fly ash, 15-20 parts of wollastonite powder, 5-8 parts of slag powder, 5-8 parts of lime, 15-20 parts of bentonite, 1-3 parts of guar gum, 3-5 parts of sodium methyl silicate and the balance of clear water. The modified fly ash is modified, so that the strength of the modified fly ash is improved, the modified fly ash is more stable, and the compressive strength and the impermeability of the slurry can be effectively improved. According to the invention, wollastonite powder is added, so that the acid and alkali resistance and strength of the slurry can be improved, and the hygroscopicity of the slurry after application can be improved. The plant gum is added in the invention, so that the stability of the slurry can be ensured, the impermeability is improved, and the prepared composite slurry is favorable for keeping good fluidity.
Description
Technical Field
The invention belongs to the technical field of building engineering materials, and particularly relates to mixed slurry for treating a foundation and a preparation method thereof.
Background
At present, the soil quality of China is various, and the characteristics of foundation soil such as strength, compression and the like have great differences due to different soil qualities. In engineering construction, when the natural foundation cannot meet the requirement of the building foundation on the foundation, various pretreatment methods are needed to improve the compressive strength of foundation soil, improve the compression characteristic of the soil and increase the bearing capacity of the foundation so as to meet the requirement of building construction. Grouting is one of the common methods for improving the performance of the foundation, and is a construction technology for preparing a certain material into slurry, filling the slurry into a bottom layer or a gap by using pressure-feeding equipment, diffusing and solidifying the slurry, and plugging water and reinforcing the stratum. For this reason, engineering technicians have made a lot of research work on mixed slurries of grouting required for various construction works.
However, the existing slurry for foundation treatment has long setting time, weak perfusion, weak compression resistance and insufficient strength.
Through the above analysis, the problems and defects existing in the prior art are as follows: the existing slurry for foundation treatment has long setting time, weak perfusion, weak compression resistance and insufficient strength.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides mixed slurry for treating a foundation and a preparation method thereof.
The invention is realized in such a way that the mixed slurry for treating the foundation consists of, by mass, 30-35 parts of cement, 15-20 parts of modified fly ash, 15-20 parts of wollastonite powder, 5-8 parts of slag powder, 5-8 parts of lime, 15-20 parts of bentonite, 1-3 parts of guar gum, 3-5 parts of sodium methyl silicate and the balance of clear water.
Another object of the present invention is to provide a method for preparing a mixed slurry for treating a foundation, the method comprising:
step one, utilizing an improver to improve silicate cement to obtain improved cement; modifying the modified fly ash coarse material by utilizing sodium carbonate and a silane coupling agent to obtain modified fly ash;
weighing cement, modified fly ash, wollastonite powder, slag powder, lime, bentonite, guar gum and sodium methyl silicate according to a proportion;
respectively crushing the weighed modified fly ash, wollastonite powder, slag powder, lime and bentonite by using a crusher, and sieving;
sequentially adding cement, wollastonite powder and a proper amount of clear water into a stirring barrel, stirring uniformly, sequentially adding modified fly ash, lime, slag powder and bentonite, stirring uniformly, adding guar gum, sodium methyl silicate and a proper amount of clear water while stirring, and uniformly mixing to obtain the mixed slurry for treating the foundation.
Further, in the first step, the Portland cement is modified by using a modifying agent, and the modified cement is obtained by the following steps:
firstly, preparing nano negative ion crystals; weighing silicate cement clinker, polyethylene rubber powder, aluminum sulfate, wheat bran and nano negative ion crystal according to a proportion;
secondly, respectively crushing wheat bran and nano negative ion crystals by using a crusher, and sieving to obtain wheat bran powder and nano negative ion powder; fully dissolving polyethylene rubber powder by using warm water to obtain a viscous solution;
grinding the silicate cement clinker and aluminum sulfate by using a grinder, adding the ground silicate cement clinker and aluminum sulfate into the viscous solution, and uniformly stirring by using a stirrer to obtain a mixture A;
and finally, fully and uniformly stirring the obtained mixture A, the wheat bran powder and the nano negative ion powder to obtain the improved cement.
Further, the preparation of the nano negative ion crystal comprises the following steps:
firstly, weighing anion powder and fully dissolving the anion powder by using 10 times of sodium carbonate aqueous solution to obtain a mixed solution;
and secondly, carrying out ultrasonic dispersion on the mixed solution, and drying the dispersed solution to obtain the nano negative ion crystal.
Further, the method for weighing silicate cement clinker, polyethylene rubber powder, aluminum sulfate, wheat bran and nano negative ion crystal according to the proportion comprises the following steps:
weighing 50-60 parts of silicate cement clinker, 5-8 parts of polyethylene rubber powder, 10-15 parts of aluminum sulfate, 3-6 parts of wheat bran and 10-20 parts of nano negative ion crystal according to the parts by weight.
Further, the modified fly ash coarse material is modified by sodium carbonate and a silane coupling agent to obtain modified fly ash, which comprises the following steps:
firstly, obtaining modified fly ash coarse materials, crushing the modified fly ash coarse materials by using a crushing device, and sieving to obtain modified fly ash fine powder;
secondly, uniformly mixing the obtained modified fly ash fine powder with a sodium carbonate solution, and performing ultrasonic dispersion treatment;
then adding a silane coupling agent into the solution after ultrasonic dispersion, and heating for a period of time to obtain a mixture;
and finally, discharging and vacuum drying the obtained mixture to obtain the modified fly ash.
Further, the heat treatment includes: heating at 100-120deg.C for 30 min.
Further, the step three of sieving includes: sieving with 70-100 mesh sieve.
Further, the stirring in the fourth step includes:
stirring speed is 2000-2500r/min, and stirring is carried out at a constant speed.
Further, in the fourth step, the ratio of solids to water in the composite slurry is 5:1.
in combination with the technical scheme and the technical problems to be solved, the technical scheme to be protected has the following advantages and positive effects:
first, aiming at the technical problems in the prior art and the difficulty of solving the problems, the technical problems solved by the technical proposal of the invention are analyzed in detail and deeply by tightly combining the technical proposal to be protected, the results and data in the research and development process, and the like, and some technical effects brought after the problems are solved have creative technical effects. The specific description is as follows:
the modified fly ash is modified, so that the strength of the modified fly ash is improved, the modified fly ash is more stable, and the compressive strength and the impermeability of the slurry can be effectively improved. According to the invention, wollastonite powder is added, so that the acid and alkali resistance and strength of the slurry can be improved, and the hygroscopicity of the slurry after application can be improved. The plant gum is added in the invention, so that the stability of the slurry can be ensured, the impermeability is improved, and the prepared composite slurry is favorable for keeping good fluidity.
Secondly, the technical scheme is regarded as a whole or from the perspective of products, and the technical scheme to be protected has the following technical effects and advantages:
the composite slurry prepared by the invention has the advantages of strong perfusion, short final setting time, low water separation rate, high flexural strength, high compressive strength, stability and the like.
Drawings
FIG. 1 is a flow chart of a method for preparing a mixed slurry for treating a foundation according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for modifying portland cement using a modifying agent to obtain modified cement in accordance with an embodiment of the present invention;
fig. 3 is a flowchart of a method for preparing a nano negative ion crystal according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In order to fully understand how the invention may be embodied by those skilled in the art, this section is an illustrative embodiment in which the claims are presented for purposes of illustration.
The mixed slurry for treating the foundation provided by the embodiment of the invention comprises, by mass, 30-35 parts of cement, 15-20 parts of modified fly ash, 15-20 parts of wollastonite powder, 5-8 parts of slag powder, 5-8 parts of lime, 15-20 parts of bentonite, 1-3 parts of guar gum, 3-5 parts of sodium methyl silicate and the balance of clear water.
As shown in fig. 1, the preparation method for treating the foundation mixed slurry provided by the embodiment of the invention comprises the following steps:
s101, modifying silicate cement by using a modifying agent to obtain modified cement; modifying the modified fly ash coarse material by utilizing sodium carbonate and a silane coupling agent to obtain modified fly ash;
s102, weighing cement, modified fly ash, wollastonite powder, slag powder, lime, bentonite, guar gum and sodium methyl silicate according to a proportion;
s103, respectively crushing the weighed modified fly ash, wollastonite powder, slag powder, lime and bentonite by using a crusher, and sieving the crushed modified fly ash, wollastonite powder, slag powder, lime and bentonite with a 70-100-mesh sieve;
and S104, sequentially adding cement, wollastonite powder and a proper amount of clear water into a stirring barrel, stirring uniformly, sequentially adding modified fly ash, lime, slag powder and bentonite, stirring uniformly, adding guar gum, sodium methyl silicate and a proper amount of clear water while stirring, and uniformly mixing to obtain the mixed slurry for treating the foundation.
As shown in fig. 2, the embodiment of the present invention provides an improvement treatment for portland cement by using an improver, and the improved cement comprises the following steps:
s201, preparing nano negative ion crystals; weighing 50-60 parts of silicate cement clinker, 5-8 parts of polyethylene rubber powder, 10-15 parts of aluminum sulfate, 3-6 parts of wheat bran and 10-20 parts of nano negative ion crystal according to parts by weight;
s202, respectively crushing wheat bran and nano negative ion crystals by using a crusher, and sieving to obtain wheat bran powder and nano negative ion powder; fully dissolving polyethylene rubber powder by using warm water to obtain a viscous solution;
s203, grinding the silicate cement clinker and aluminum sulfate by using a grinder, adding the ground silicate cement clinker and aluminum sulfate into the viscous solution, and uniformly stirring by using a stirrer to obtain a mixture A;
and S204, fully and uniformly stirring the obtained mixture A, the wheat bran powder and the nano negative ion powder to obtain the improved cement.
As shown in fig. 3, the preparation of the nano negative ion crystal provided by the embodiment of the invention includes:
s301, weighing anion powder and fully dissolving the anion powder by using 10 times of sodium carbonate aqueous solution to obtain a mixed solution;
s302, performing ultrasonic dispersion on the mixed solution, and drying the dispersed solution to obtain the nano negative ion crystal.
The method for weighing silicate cement clinker, polyethylene rubber powder, aluminum sulfate, wheat bran and nano negative ion crystal according to the proportion provided by the embodiment of the invention comprises the following steps:
the modified fly ash obtained by modifying the modified fly ash coarse material by using sodium carbonate and a silane coupling agent provided by the embodiment of the invention comprises the following steps:
firstly, obtaining modified fly ash coarse materials, crushing the modified fly ash coarse materials by using a crushing device, and sieving to obtain modified fly ash fine powder;
secondly, uniformly mixing the obtained modified fly ash fine powder with a sodium carbonate solution, and performing ultrasonic dispersion treatment;
then adding a silane coupling agent into the solution after ultrasonic dispersion, and heating for 30 minutes at 100-120 ℃ to obtain a mixture;
and finally, discharging and vacuum drying the obtained mixture to obtain the modified fly ash.
In step S104 provided by the embodiment of the present invention, stirring includes: stirring speed is 2000-2500r/min, and stirring is carried out at a constant speed.
The ratio of solids to water in the composite slurry in step S104 provided by the embodiment of the invention is 5:1.
example 1: the mixed slurry group for treating the foundation consists of 30-35 parts of cement, 15-20 parts of modified fly ash, 15-20 parts of wollastonite powder, 5-8 parts of slag powder, 5-8 parts of lime, 15-20 parts of bentonite, 1-2 parts of guar gum, 3-5 parts of sodium methyl silicate, 0.5-1 part of superplasticizer, 0.1-0.3 part of cellulose fiber and the balance of clear water.
Advantages of this embodiment: the cellulose fiber has high flexibility and strength, can form a network structure, and increases the toughness and ductility of the mixed slurry, thereby improving the cracking resistance of the mixed slurry. The cellulose fibers may also form composites with other materials in the mixed slurry, enhancing the strength and stability of the mixed slurry. In addition, the surface of the cellulose fiber has higher adsorptivity, and can be subjected to physical adsorption with substances such as cement, modified fly ash and the like in the mixed slurry to form a composite structure, so that the durability of the mixed slurry is improved.
Example 2: the mixed slurry group for treating foundation consists of cement 30-35 parts, modified fly ash 15-20 parts, wollastonite powder 15-20 parts, slag powder 5-8 parts, lime 5-8 parts, bentonite 15-20 parts, guar gum 1-2 parts, sodium methyl silicate 2-3 parts, superplasticizer 0.5-1 part and clear water for the rest.
Advantages of this embodiment: molecules in the superplasticizer interact with the surfaces of cement, modified fly ash, lime and other particles in the mixture to form a physically adsorbed molecular layer, and the charge property and the hydrophilicity of the surfaces of the particles are changed, so that the rheological property of the mixture is changed, and the fluidity and the strength of the mixture are improved. The addition of proper amount of superplasticizer can reduce the viscosity of the mixed slurry, improve the fluidity and pumpability, and improve the strength and durability of the mixed slurry.
Example 3: the mixed slurry group for treating foundation consists of cement 30-35 parts, modified fly ash 15-20 parts, wollastonite powder 15-20 parts, slag powder 5-8 parts, lime 5-8 parts, bentonite 15-20 parts, guar gum 1-2 parts, sodium methyl silicate 3-5 parts, retarder 0.1-0.3 parts and clear water for the rest.
Advantages of this embodiment: the components in the retarder can react with the hardening products on the surfaces of the cement particles to form a layer of stable surface film, so that the interaction force between the cement particles is reduced, the hardening reaction and the hydration reaction of the cement particles are delayed, the hardening speed of the whole mixture is slowed down, the fluidity and the plasticity of the mixture are prolonged, and the mixture is easier to process in the construction process.
Example 4: the mixed slurry group for treating foundation consists of cement 30-35 parts, modified fly ash 15-20 parts, wollastonite powder 15-20 parts, slag powder 5-8 parts, lime 5-8 parts, bentonite 15-20 parts, guar gum 1-2 parts, sodium methyl silicate 3-5 parts, waterproof agent 0.1-0.3 part and clear water for the rest.
Advantages of this embodiment: the waterproof agent has certain permeability, can permeate into the mixture, and reacts with cement, modified fly ash, wollastonite powder and other components in the mixture to form a layer of compact protective film to prevent water from permeating and leaking, so that the aim of waterproof is fulfilled. In addition, the waterproof agent can also fill micro pores in the mixture, so that the compactness and consistency of the mixture are improved, the adhesive force and durability of the mixture are enhanced, the service life of the foundation mixed slurry is prolonged, the adhesive force between the foundation mixed slurry and a foundation building is increased, the adhesive strength between the foundation mixed slurry and the building is improved, and the stability of the foundation building is enhanced.
Example 5: the preparation method for treating the foundation mixed slurry comprises the following steps:
weighing cement, modified fly ash, wollastonite powder, slag powder, lime, bentonite, guar gum, sodium methyl silicate and cellulose fiber according to a proportion;
respectively crushing the weighed modified fly ash, wollastonite powder, slag powder, lime and bentonite by using a crusher, and sieving to 70-100 meshes;
sequentially adding cement, wollastonite powder and a proper amount of clear water into a stirring barrel, stirring uniformly, sequentially adding modified fly ash, lime, slag powder and bentonite, stirring for 20-25 min, mixing uniformly, and adding cellulose fibers while stirring. And adding guar gum, sodium methyl silicate and a proper amount of clear water while stirring, and uniformly mixing to obtain the mixed slurry for treating the foundation.
Example 6: the preparation method for treating the foundation mixed slurry comprises the following steps:
step one, utilizing an improver to improve silicate cement to obtain improved cement; modifying the modified fly ash coarse material by utilizing sodium carbonate and a silane coupling agent to obtain modified fly ash;
weighing cement, modified fly ash, wollastonite powder, slag powder, lime, bentonite, guar gum and sodium methyl silicate according to a proportion;
respectively crushing the weighed modified fly ash, wollastonite powder, slag powder, lime and bentonite by using a crusher, and sieving;
sequentially adding cement, wollastonite powder and a proper amount of clear water into a stirring barrel, stirring uniformly, sequentially adding modified fly ash, lime, slag powder and bentonite, stirring for 20-25 min, mixing uniformly, and adding a water reducer. And adding guar gum, sodium methyl silicate and a proper amount of clear water while stirring, and uniformly mixing to obtain the mixed slurry for treating the foundation.
The foregoing is merely illustrative of specific embodiments of the present invention, and the scope of the invention is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention will be apparent to those skilled in the art within the scope of the present invention.
Claims (10)
1. The mixed slurry for treating the foundation is characterized by comprising, by mass, 30-35 parts of cement, 15-20 parts of modified fly ash, 15-20 parts of wollastonite powder, 5-8 parts of slag powder, 5-8 parts of lime, 15-20 parts of bentonite, 1-3 parts of guar gum, 3-5 parts of methyl sodium silicate and the balance of clear water.
2. The slurry for treating a foundation according to claim 1, wherein the slurry for treating a foundation is composed of 30 to 35 parts of cement, 15 to 20 parts of modified fly ash, 15 to 20 parts of wollastonite powder, 5 to 8 parts of slag powder, 5 to 8 parts of lime, 15 to 20 parts of bentonite, 1 to 2 parts of guar gum, 3 to 5 parts of sodium methyl silicate, 0.5 to 1 part of superplasticizer, 0.1 to 0.3 part of cellulose fiber, and the balance of clear water.
3. The slurry for treating a foundation according to claim 1, wherein the slurry for treating a foundation is composed of 30 to 35 parts of cement, 15 to 20 parts of modified fly ash, 15 to 20 parts of wollastonite powder, 5 to 8 parts of slag powder, 5 to 8 parts of lime, 15 to 20 parts of bentonite, 1 to 2 parts of guar gum, 2 to 3 parts of sodium methyl silicate, 0.5 to 1 part of superplasticizer and the balance of clear water.
4. A method for preparing a mixed slurry for treating a foundation, the method comprising:
step one, utilizing an improver to improve silicate cement to obtain improved cement; modifying the modified fly ash coarse material by utilizing sodium carbonate and a silane coupling agent to obtain modified fly ash;
weighing cement, modified fly ash, wollastonite powder, slag powder, lime, bentonite, guar gum and sodium methyl silicate according to a proportion;
respectively crushing the weighed modified fly ash, wollastonite powder, slag powder, lime and bentonite by using a crusher, and sieving;
sequentially adding cement, wollastonite powder and a proper amount of clear water into a stirring barrel, stirring uniformly, sequentially adding modified fly ash, lime, slag powder and bentonite, stirring uniformly, adding guar gum, sodium methyl silicate and a proper amount of clear water while stirring, and uniformly mixing to obtain the mixed slurry for treating the foundation.
5. The method for preparing a mixed slurry for treating a foundation according to claim 4, wherein the preparing method further comprises:
step 1, weighing cement, modified fly ash, wollastonite powder, slag powder, lime, bentonite, guar gum, sodium methyl silicate and cellulose fiber according to a proportion;
step 2, respectively crushing the weighed modified fly ash, wollastonite powder, slag powder, lime and bentonite by using a crusher, and sieving to 70-100 meshes;
step 3, sequentially adding cement, wollastonite powder and a proper amount of clear water into a stirring barrel, stirring uniformly, sequentially adding modified fly ash, lime, slag powder and bentonite, stirring for 20-25 min, mixing uniformly, and adding cellulose fibers while stirring; and adding guar gum, sodium methyl silicate and a proper amount of clear water while stirring, and uniformly mixing to obtain the mixed slurry for treating the foundation.
6. The method for preparing mixed slurry for treating foundation according to claim 4, wherein the step one of modifying portland cement with modifying agent to obtain modified cement comprises the steps of:
firstly, preparing nano negative ion crystals; weighing silicate cement clinker, polyethylene rubber powder, aluminum sulfate, wheat bran and nano negative ion crystal according to a proportion;
secondly, respectively crushing wheat bran and nano negative ion crystals by using a crusher, and sieving to obtain wheat bran powder and nano negative ion powder; fully dissolving polyethylene rubber powder by using warm water to obtain a viscous solution;
grinding the silicate cement clinker and aluminum sulfate by using a grinder, adding the ground silicate cement clinker and aluminum sulfate into the viscous solution, and uniformly stirring by using a stirrer to obtain a mixture A;
and finally, fully and uniformly stirring the obtained mixture A, the wheat bran powder and the nano negative ion powder to obtain the improved cement.
7. The method for preparing a mixed slurry for treating a foundation according to claim 4, wherein the preparing nano negative ion crystals comprises:
firstly, weighing anion powder and fully dissolving the anion powder by using 10 times of sodium carbonate aqueous solution to obtain a mixed solution;
and secondly, carrying out ultrasonic dispersion on the mixed solution, and drying the dispersed solution to obtain the nano negative ion crystal.
8. The method for preparing mixed slurry for treating foundation according to claim 4, wherein the proportioning silicate cement clinker, polyethylene powder, aluminum sulfate, wheat bran and nano negative ion crystal comprises:
weighing 50-60 parts of silicate cement clinker, 5-8 parts of polyethylene rubber powder, 10-15 parts of aluminum sulfate, 3-6 parts of wheat bran and 10-20 parts of nano negative ion crystal according to the parts by weight.
9. The method for preparing mixed slurry for treating foundation according to claim 4, wherein the modifying the modified fly ash coarse material with sodium carbonate and silane coupling agent to obtain modified fly ash comprises the steps of:
firstly, obtaining modified fly ash coarse materials, crushing the modified fly ash coarse materials by using a crushing device, and sieving to obtain modified fly ash fine powder;
secondly, uniformly mixing the obtained modified fly ash fine powder with a sodium carbonate solution, and performing ultrasonic dispersion treatment;
then adding a silane coupling agent into the solution after ultrasonic dispersion, and heating for a period of time to obtain a mixture;
and finally, discharging and vacuum drying the obtained mixture to obtain the modified fly ash.
10. The method for preparing a mixed slurry for treating a foundation according to claim 4, wherein the sieving in the third step comprises: sieving with 70-100 mesh sieve;
stirring at a constant speed in the fourth step, wherein the stirring speed is 2000-2500 r/min;
in the fourth step, the ratio of the solid to the water in the composite slurry is 5:1.
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