CN111718156A - Alkali-activated geopolymer grouting material for loess foundation and preparation method thereof - Google Patents
Alkali-activated geopolymer grouting material for loess foundation and preparation method thereof Download PDFInfo
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- CN111718156A CN111718156A CN202010385675.8A CN202010385675A CN111718156A CN 111718156 A CN111718156 A CN 111718156A CN 202010385675 A CN202010385675 A CN 202010385675A CN 111718156 A CN111718156 A CN 111718156A
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- 239000003513 alkali Substances 0.000 title claims abstract description 42
- 239000000463 material Substances 0.000 title claims abstract description 38
- 229920000876 geopolymer Polymers 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000010881 fly ash Substances 0.000 claims abstract description 23
- 238000003756 stirring Methods 0.000 claims abstract description 21
- 239000003607 modifier Substances 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 14
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000012190 activator Substances 0.000 claims abstract description 11
- 239000002131 composite material Substances 0.000 claims abstract description 11
- 239000008399 tap water Substances 0.000 claims abstract description 10
- 235000020679 tap water Nutrition 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 3
- 229910052909 inorganic silicate Inorganic materials 0.000 claims description 9
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 4
- 235000011152 sodium sulphate Nutrition 0.000 claims description 4
- 239000010883 coal ash Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 abstract description 7
- 239000002689 soil Substances 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 238000007596 consolidation process Methods 0.000 abstract description 2
- 230000008439 repair process Effects 0.000 abstract description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 239000003292 glue Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 229910000323 aluminium silicate Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000008239 natural water Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910003471 inorganic composite material Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material 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
- C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
-
- 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
- C04B12/00—Cements not provided for in groups C04B7/00 - C04B11/00
- C04B12/04—Alkali metal or ammonium silicate cements ; Alkyl silicate cements; Silica sol cements; Soluble silicate 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
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/002—Water
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
- C04B22/147—Alkali-metal sulfates; Ammonium sulfate
-
- 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
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
-
- 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)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses an alkali-activated geopolymer grouting material for a loess foundation and a preparation method thereof. The water-soluble fly ash modifier is prepared from 100 parts of fly ash, 3.6-4.0 parts of alkali activator (water glass), 7-10 parts of tap water, 1.3-1.9 parts of modifier and 1.5-3.0 parts of water glass in modulus. And a grouting technique for the loess foundation is adopted for grouting. The invention has the advantages of good viscosity, good water solubility, high middle and later stage strength and good consolidation, compared with the traditional alkali-activated geopolymer material, the material is a composite material formed by mixing various powdery and liquid raw materials, can be used by adding water and stirring on site, has simple preparation process, low cost, convenient operation, loess reinforcement, no collapsibility, no disintegration phenomenon, good water stability and higher foundation soil strength. Can be widely applied to loess reinforcement, road grouting, crack repair and the like in northwest areas.
Description
Technical Field
The invention belongs to the technical field of inorganic composite materials, and relates to an alkali-activated geopolymer grouting material for a loess foundation and a preparation method thereof.
Background
The alkali-activated geopolymer is a novel aluminosilicate inorganic cementing material generated by reacting an active aluminosilicate material, namely metakaolin, clay, slag, fly ash, silica fume and the like, with a strong alkali or a strong alkali silicate solution. In 1978, Davidovits, a famous French scientist, named this material as an alkali-activated geopolymer for the first time and proposed the reaction mechanism of the alkali-activated geopolymer. The alkali-activated geopolymer has the advantages of fast hardening, early strength, corrosion resistance, environmental protection, high temperature resistance, good durability and the like, and is widely applied to the fields of building materials, grouting and joint repairing, loess curing and the like.
The deformation of collapsible loess foundation is mainly collapsible deformation except compression deformation. In the state of natural water content, collapsible loess has low compressibility and high strength. The natural water content is generally within 10-22%, and the saturation is between 40-60%. The compression deformation is caused by the load on the upper part of the building with the foundation under the natural humidity, the compression deformation is gradually reduced along with the prolonging of the time, the stability is fast, and the compression deformation tends to be stable about one year after the completion of the engineering. When the base pressure is not greater than the characteristic bearing capacity of the foundation soil, the compression deformation value is small and usually does not exceed the allowable deformation value of the superstructure, and the building is not adversely affected.
When the collapsible loess with natural humidity is soaked in water, the collapsible deformation occurs under the action of the applied pressure or the load of the building, and the foundation has the characteristics of obviously reduced strength, increased deformation and sudden tendency. Engineering practices have shown that when building foundations are left untreated or mishandled, collapsible deformation of loess foundations occurs frequently and is not uniform when water leaks, water seepage, or the ground water level rises for various reasons. At the initial stage of soaking the foundation by water, 150-250 mm of settlement can be generated day and night, the upper structure of a building or a structure is difficult to adapt to and resist the foundation deformation with high speed, large settlement and unevenness, and the foundation has large destructiveness and serious harmfulness to the building. Therefore, when the collapsible loess area is constructed, various engineering measures are required to be taken for treating the foundation so as to improve the physical and mechanical properties of the soil, increase the water stability, eliminate or reduce the collapsible amount of the loess foundation and ensure the safety and normal use of the building. Most foundations in northwest areas of China are loess, and various building construction activities carried out on the loess foundations are inevitably seriously influenced.
Disclosure of Invention
In view of the above, the invention provides an alkali-activated geopolymer grouting material for a loess foundation and a preparation method thereof.
The invention solves the technical problems by the following technical means:
the invention relates to an alkali-activated geopolymer grouting material for a loess foundation, which consists of 100 parts of fly ash, 3.6-4.0 parts of alkali activator, 7-10 parts of tap water and 1.3-1.9 parts of modifier in parts by weight.
The modifier is AR-grade sodium sulfate, the fly ash is 600-mesh particles, the quality reaches more than two grades, the alkali activator is liquid water glass with a modulus of 1.5-3.0, and the fineness of the modifier is more than 120 meshes.
A preparation method of an alkali-activated geopolymer grouting material for a loess foundation comprises the following steps:
(1) preparing an inorganic silicate composite material, namely putting the fly ash, the alkali activator and the modifier into a stirrer, and uniformly stirring at normal temperature and normal pressure to obtain the inorganic silicate composite material;
(2) and (3) mixing the mass ratio of the sum of water in tap water and water glass to the pulverized coal ash in the inorganic silicate composite material is 0.25: 1, placing the slurry in a stirrer, and stirring and mixing uniformly to obtain the alkali-activated geopolymer grouting material.
The stirring time of the step (1) is 1-2 minutes, and the stirring time of the step (2) is 5-8 minutes.
The invention has the advantages of good viscosity, good water solubility, high middle and later stage strength and good consolidation, compared with the traditional alkali-activated geopolymer material, the material is a composite material formed by mixing various powdery and liquid raw materials, can be used by adding water and stirring on site, has simple preparation process, low cost, convenient operation, loess reinforcement, no collapsibility, no disintegration phenomenon, good water stability and higher foundation soil strength. Can be widely applied to loess reinforcement, road grouting, crack repair and the like in northwest areas.
The invention has the beneficial effects that:
1. the modifier is sodium sulfate, and then the alkali activator, the fly ash, the modifier and tap water are flexibly selected and mixed to prepare the alkali-activated geopolymer grouting material, so that the performance indexes of the gelation time and the fluidity of the alkali-activated geopolymer grouting material can achieve the stable and adjustable effect, and the comprehensive use performance of the alkali-activated geopolymer grouting material is greatly improved.
2 the alkali-activated geopolymer grouting material for the loess foundation can be prepared at normal temperature and normal pressure, has no special requirements, is convenient to obtain materials, can be used for grouting while being prepared on a construction site, and greatly reduces the labor and material cost.
3. The material of the invention is fly ash, which is a misplaced resource, and the invention is reasonable in utilization, changes waste into valuable, saves resources and reduces pollution to environment. Promotes the application and popularization of the fly ash-based alkali-activated geopolymer, increases the resource utilization rate of industrial waste, has higher economic benefit and environmental protection value, meets the requirement of sustainable development, and is beneficial to the construction of ecological civilization.
Detailed Description
The invention is described below with reference to specific examples, and an alkali-activated geopolymer grouting material for a loess foundation and a preparation method thereof are provided, wherein the alkali-activated geopolymer grouting material for the loess foundation comprises, by mass, 100 parts of fly ash, 3.6-4.0 parts of an alkali activator, 7-10 parts of tap water and 1.3-1.9 parts of a modifier.
The modifier is AR-grade sodium sulfate, the fly ash is 600-mesh particles, the quality reaches more than two grades, the alkali activator is liquid water glass with a modulus of 1.5-3.0, and the fineness of the modifier is more than 120 meshes.
A preparation method of an alkali-activated geopolymer grouting material for a loess foundation comprises the following steps:
(1) preparing an inorganic silicate composite material, namely putting the fly ash, the alkali activator and the modifier into a stirrer, and uniformly stirring at normal temperature and normal pressure to obtain the inorganic silicate composite material;
(2) and (3) mixing the mass ratio of the sum of water in tap water and water glass to the pulverized coal ash in the inorganic silicate composite material is 0.25: 1, placing the slurry in a stirrer, and stirring and mixing uniformly to obtain the alkali-activated geopolymer grouting material.
The stirring time of the step (1) is 1-2 minutes, and the stirring time of the step (2) is 5-8 minutes.
Example 1
(1) Taking 100 parts of fly ash by weight after drying;
(2) adding 1.5 parts by mass of a modifier;
(3) putting the two raw materials into a stirring pot, and stirring uniformly for 1.5 minutes to obtain a mixture;
(4) taking 4 parts of prepared water glass with the modulus of 1.5;
(5) taking tap water according to the water-to-glue ratio of 0.25;
(6) uniformly stirring the solutions in the steps (4) and (5) for 2.5 minutes;
(7) putting the materials in the steps (3) and (7) into a stirrer, and uniformly stirring for 7 minutes;
(8) pouring the dispersed material into a shaping mold, and compacting and molding;
(9) demoulding the formed material within 3d, and maintaining for 28d in a natural state to obtain the product.
Further, the fly ash powder in the step (1) reaches 600 meshes.
Furthermore, the modulus of the water glass in the step (4) needs to be adjusted by adding NaOH.
Further, the water in the water-to-glue ratio of 0.25 in the step (5) contains the sum of the water glass and the external water, and the glue of 0.25 in the water-to-glue ratio refers to the mass of the fly ash.
Further, the mold in the step (7) is a 160x40x40mm cubic mold, and a casting process is completed and compacted.
The strength of the alkali-activated geopolymer obtained in example 1 is 48.05MPa, which is improved by 79% compared with that of the geopolymer (26.85MPa) based on fly ash in the conventional process.
Example 2
A certain residential building in Gansu province is selected, the foundation of the residential building is located on a loess foundation, and since the 90 s, the wall body of the residential building has a plurality of inclined cracks, so that the foundation sinks seriously. And (3) reinforcing by using an alkali-activated geopolymer grouting material for the loess foundation.
(1) Taking 1000 parts of fly ash by weight after drying;
(2) adding 10-15 parts by mass of a modifier;
(3) putting the two raw materials into a stirrer, and stirring uniformly for 1-2 minutes to obtain a mixture;
(4) 40 parts of prepared water glass with the modulus of 1.5;
(5) taking 70-100 parts of tap water according to the water-to-glue ratio of 0.25;
(6) uniformly stirring the solutions in the steps (4) and (5) for 2-3 minutes;
(7) putting the materials in the steps (3) and (6) into a stirrer, and stirring and mixing uniformly for 5-8 minutes;
(8) putting the materials in the steps (6) and (7) into a stirrer to be uniformly stirred;
(9) injecting the grouting material obtained in the step (8) into the loess foundation:
(10) selecting 6 points at random after 28d, taking original soil samples at different depths, and carrying out a cube strength test;
further, the fly ash powder in the step (1) reaches 600 meshes.
Furthermore, the modulus of the water glass in the step (4) needs to be adjusted by adding NaOH.
Further, the water in the water-to-gel ratio of 0.25 in the step (5) contains the sum of the water glass and the external water, and the gel of 0.25 in the water-to-gel ratio refers to the mass of the fly ash.
Further, the compressive strength of the soil sample cube in the step (10) is averaged.
The test result of example 2 shows that the foundation bearing capacity fk is 542kPa after the reinforcement, the detection result shows that the foundation reinforcement effect is better, the standard value of the foundation bearing capacity fk meeting the design requirement is more than or equal to 200kPa, and the reinforcement purpose is achieved.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (4)
1. An alkali-activated geopolymer grouting material for a loess foundation, characterized in that: the fly ash modifier consists of 100 parts of fly ash, 3.6-4.0 parts of alkali activator, 7-10 parts of tap water and 1.3-1.9 parts of modifier in parts by mass.
2. The alkali-activated geopolymer grouting material for a loess foundation according to claim 1, wherein: the modifier is AR-grade sodium sulfate, the fly ash is 600-mesh particles, the quality reaches more than two grades, the alkali activator is liquid water glass with a modulus of 1.5-3.0, and the fineness of the modifier is more than 120 meshes.
3. A preparation method of an alkali-activated geopolymer grouting material for a loess foundation is characterized by comprising the following steps of:
(1) preparing an inorganic silicate composite material, namely putting the fly ash, the alkali activator and the modifier into a stirrer, and uniformly stirring at normal temperature and normal pressure to obtain the inorganic silicate composite material;
(2) and (3) mixing the mass ratio of the sum of water in tap water and water glass to the pulverized coal ash in the inorganic silicate composite material is 0.25: 1, placing the slurry in a stirrer, and stirring and mixing uniformly to obtain the alkali-activated geopolymer grouting material.
4. The method for preparing the alkali-activated geopolymer grouting material for the loess foundation according to claim 3, wherein: the stirring time of the step (1) is 1-2 minutes, and the stirring time of the step (2) is 5-8 minutes.
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| CN202010385675.8A CN111718156A (en) | 2020-05-09 | 2020-05-09 | Alkali-activated geopolymer grouting material for loess foundation and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112608188A (en) * | 2021-01-25 | 2021-04-06 | 西北师范大学 | Preparation method of loess-based geopolymer compound slow-release fertilizer |
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