CN110981319A - Fly ash-based novel geopolymer mortar with cooperation of recycled red brick micro powder and mineral powder and preparation method thereof - Google Patents
Fly ash-based novel geopolymer mortar with cooperation of recycled red brick micro powder and mineral powder and preparation method thereof Download PDFInfo
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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
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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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/26—Cements from oil shales, residues or waste other than slag from raw materials containing flue dust, i.e. fly ash
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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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
- 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
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- 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
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- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a novel fly ash-based geopolymer mortar with cooperation of recycled red brick micro powder and mineral powder and a preparation method thereof. The fly ash-based geopolymer of the recycled red brick micro powder and the mineral powder comprises the following components: the brick comprises recycled red brick micro powder, fly ash, mineral powder, fine aggregate, sodium hydroxide, water glass and sodium carbonate. The fly ash-based novel geopolymer mortar with the cooperation of the recycled red brick micro powder and the mineral powder is prepared from the recycled red brick micro powder, the fly ash, the mineral powder, fine aggregate, sodium hydroxide, water glass and sodium carbonate according to the proportion of 0.09-0.44: 0.27-0.52: 1: 3.11-4.78: 0.05-0.11: 0.39-0.62: 0.04-0.08: 0.25-0.51; the water-cement ratio is 0.35-0.52, wherein all water comprises water contained in the water glass and a certain amount of added water. Compared with cement-based mortar, the novel geopolymer mortar based on the fly ash of the regenerated red brick micro powder and the mineral powder has the advantages that the strength is obviously improved, the working performances such as the bonding performance, the workability and the like are improved, the efficiency is high, the environment is protected, and the resources are saved.
Description
Technical Field
The invention relates to the technical field of building engineering materials, in particular to a novel fly ash-based geopolymer mortar with cooperation of recycled red brick micro powder and mineral powder and a preparation method thereof.
Background
In the prior art, in order to improve the performance of various types of mortar in building structures, the performance of cement-based mortar or geopolymer mortar is generally improved by adding various additional materials. However, these solutions have some drawbacks: 1) the cement-based mortar uses a large amount of cement, which causes high carbon emission and adverse effects on the environment. 2) Various cementing materials are added into the geopolymer mortar, so that the production cost is high; wherein the production of some of the raw materials (e.g., metakaolin, etc.) causes environmental stress. 3) The production process of improving the mortar performance by adding various additive materials is too complicated.
In addition, with the continuous promotion of the urbanization process, the acceleration of the industrialization process and the continuous improvement of the living standard of people, the construction waste generated by each city in China is increased day by day, which accounts for 30% -40% of the total quantity of the urban waste, and the quantity of the construction waste generated by the cities in China is estimated to be about 6 hundred million tons each year. The regeneration and resource utilization of construction wastes is an important aspect for realizing sustainable development, building circular economy and constructing conservation-oriented society in the construction industry. The waste bricks account for more than 30% of construction waste due to the massive building of masonry structure houses in China in one hundred years, and the recycling of the waste bricks is an important aspect for realizing sustainable development of the construction industry, building circular economy and constructing a conservation-oriented society.
At present, the following problems mainly exist in the structural application of the resource utilization of the construction waste at home and abroad: firstly, most construction wastes are crushed and processed into recycled aggregates to be applied to engineering, but the recycled aggregates have cracks in the process, and the structural surfaces of the recycled aggregates are likely to be carbonized in nature and corroded by rainwater and the like, so that the recycled aggregates become loose, the recycled concrete test piece has the defects of low strength and ductility, large creep shrinkage and the like, and the quality discreteness is large; secondly, a lot of powder waste materials are generated in the production process of the recycled aggregate, which not only pollutes the environment, but also is inconvenient to treat and utilize.
Therefore, the invention provides a novel solid waste base geopolymer mortar with the cooperation of recycled red brick micro powder and fly ash and a preparation method thereof. The fly ash and the mineral powder in the raw materials are industrial solid wastes, the regenerated red brick micro powder is a construction waste, the fly ash and the mineral powder have volcanic ash activity, and the fly ash, the mineral powder and the regenerated red brick micro powder are mixed to be used as an excited cementing material, so that the emission of carbon dioxide is reduced, resources are saved, the cost is reduced, and the geopolymer mortar with good strength, bonding property and workability can be obtained and applied to engineering construction.
Disclosure of Invention
The invention aims to provide a novel fly ash-based geopolymer mortar with the cooperation of recycled red brick micro powder and mineral powder and a preparation method thereof, and aims to solve at least part of problems in the background technology.
In order to achieve the purpose, according to one aspect of the invention, the fly ash-based novel geopolymer mortar with the synergistic effect of the recycled red brick micro powder and the mineral powder is prepared from the recycled red brick micro powder, fly ash, mineral powder, fine aggregate, sodium hydroxide, water glass, sodium carbonate and a certain amount of externally added water according to corresponding proportions, wherein the mass ratio of the recycled red brick micro powder, the fly ash, the mineral powder, the fine aggregate, the sodium hydroxide, the water glass, the sodium carbonate and the externally added water is 0.09-0.44: 0.27-0.52: 1: 3.11-4.78: 0.05-0.11: 0.39-0.62: 0.04-0.08: 0.25-0.51, and the mass ratio of the sum of the mass of the recycled red brick micro powder, the fly ash and the mineral powder to the mass of the water is 0.35-0.52.
According to an embodiment of the present invention, wherein the modulus of the water glass is 1.5 to 3.4.
According to one embodiment of the invention, the ore powder is slag powder of grade not lower than grade S95.
According to one embodiment of the invention, wherein the fly ash comprises class C fly ash and class F fly ash, grade one fly ash.
According to one embodiment of the invention, the recycled red brick micro powder is powder produced by sorting sintered brick construction waste in a storage yard, crushing by a crusher, sieving by a sieving machine and grinding by a ball mill, and the fineness reaches RFP-II level and above standard.
According to one embodiment of the invention, the recycled red brick micro powder has the particle size of less than 0.075mm, the volume density of 2.79g/mm3 and the specific surface area of 440m 2/kg.
According to one embodiment of the present invention, wherein the fineness modulus of the fine aggregate is 1.7 to 3.2. The natural fine aggregate comprises natural river sand, the particle size d3 of the natural fine aggregate is 0.35mm-0.5mm, the natural fine aggregate is continuously graded, and the bulk density is 1423-1482kg/m3The water absorption rate is 4.32-5.11%, and the water content is 2.98-3.28%.
According to another aspect of the present invention, there is provided a method for preparing said mortar, characterized by comprising:
a. preparing an alkali-activated solution from the water glass, sodium hydroxide and the total of the external water of claim 1, and standing for 20 to 48 hours;
b. putting the mineral powder, the fly ash, the recycled red brick powder and the fine aggregate into a stirrer, and performing dry stirring to uniformly mix the mineral powder, the fly ash, the recycled red brick powder and the fine aggregate, wherein the mixing time can be 8-40 seconds, 10-20 seconds and the like;
c. adding the alkali-activated solution after standing and the sodium carbonate into the stirrer respectively, and then stirring to uniformly mix the alkali-activated solution and the sodium carbonate, wherein the mixing time can be 40-90 seconds, 50-60 seconds and the like, thereby obtaining the mortar.
According to one embodiment of the invention, wherein the modulus of the alkali-activated solution is 1.4 to 2.2.
According to one embodiment of the invention, wherein the mixer is a cement mortar mixer.
According to one embodiment of the invention, wherein the alkali-activated solution after standing is slowly added first in step c, followed by the addition of the sodium carbonate.
Compared with the prior art, the novel geopolymer mortar based on the fly ash and with the cooperation of the recycled red brick micro powder and the mineral powder has the advantages that compared with the existing recycled concrete, the strength is obviously improved, the working performances such as the flowing property, the workability and the like are improved, the efficiency is higher, the environment is protected, and the resources are saved.
Drawings
Fig. 1 is a process flow diagram of a fly ash-based novel geopolymer mortar with the cooperation of recycled red brick micropowder and mineral powder according to one embodiment of the invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings and specific embodiments, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please provide specific examples in accordance with the application (application No. 201810619747.3) filed in the previous section of the noble Community
Example 1: a fly ash based novel geopolymer mortar with the cooperation of recycled red brick micro powder and mineral powder is composed of the following raw materials by weight: 44.98kg of regenerated red brick micro powder, 122.67kg of fly ash, 342.79kg of mineral powder, 1271.64kg of fine aggregate, 20.89kg of sodium hydroxide, 150.97kg of water glass, 16.85kg of sodium carbonate and 120.78kg of added water, wherein the water-to-glue ratio is 0.42.
The particle size of the regenerated red brick micro powder is less than 0.075mm, the volume density is 2.79g/mm3, and the specific surface area is 440m 2/kg.
The fly ash is F-class and first-class fly ash.
The mineral powder is S95 grade mineral powder.
The fine aggregate comprises natural river sand, the particle size d2 of the fine aggregate is 0.35mm-0.5mm, the fine aggregate is in continuous gradation, the volume density is 1432kg/m3, the water absorption is 4.53%, and the water content is 2.99%.
The fly ash-based novel geopolymer mortar with the cooperation of the recycled red brick micro powder and the mineral powder comprises the following steps:
in the first step, water glass, sodium hydroxide and external water are prepared according to the raw material mass ratio of claim 1.
And step two, putting the water glass, the sodium hydroxide and the externally added water into a container capable of being sealed, uniformly stirring, and standing for 24 hours to prepare the alkali-activated solution.
Thirdly, preparing the regenerated red brick micro powder, the fly ash, the mineral powder, the fine aggregate and the sodium carbonate according to the mass ratio of the raw materials in the claim 1.
Fourthly, putting the regenerated red brick micro powder, the fly ash, the mineral powder and the fine aggregate into a cement mortar stirrer, and performing dry mixing for 40-60 s to uniformly stir the regenerated red brick micro powder, the fly ash, the mineral powder and the fine aggregate;
and fifthly, sequentially and slowly and uniformly adding the alkali activator and the sodium carbonate into the cement mortar stirrer, and stirring for 30-60 s until the mixture is uniformly mixed.
Sixthly, keeping the prepared regenerated red brick micro powder and the novel coal ash-based geopolymer mortar of the mineral powder in cooperation with the compression strength cube test block, standing for 24 hours in an environment with the temperature of 20 +/-5 ℃, and finally moving to a standard concrete curing chamber for curing, wherein the standard curing period is 3 days and 28 days.
After the curing age is reached, according to the method specified by JGJ/T70-2009 building mortar basic performance test method standard, a test block is taken out for a compression test, and the 28d compression strength and the 3d compression strength of the obtained novel geopolymer mortar based on the fly ash of the regenerated red brick micro powder and the mineral powder are 65.20MPa and 46.35MPa respectively.
Example 2: the fly ash-based novel geopolymer mortar with the synergy of the recycled red brick micro powder and the mineral powder is prepared from the following raw materials in parts by weight: 81.33kg of regenerated red brick micro powder, 121.99kg of fly ash, 306.78kg of mineral powder, 1272.18kg of fine aggregate, 21.66kg of sodium hydroxide, 151.17kg of water glass, 17.05kg of sodium carbonate and 120.52kg of additional water, wherein the water-to-glue ratio is 0.42.
The particle size of the regenerated red brick micro powder is less than 0.075mm, the volume density is 2.79g/mm3, and the specific surface area is 440m 2/kg.
The fly ash is F-class and first-class fly ash.
The mineral powder is S95 grade mineral powder.
The fine aggregate comprises natural river sand, the particle size d2 of the fine aggregate is 0.35mm-0.5mm, the fine aggregate is in continuous gradation, the volume density is 1448kg/m3, the water absorption rate is 4.77%, and the water content is 3.11%.
The fly ash-based novel geopolymer mortar with the cooperation of the recycled red brick micro powder and the mineral powder comprises the following steps:
in the first step, water glass, sodium hydroxide and external water are prepared according to the raw material mass ratio of claim 1.
And step two, putting the water glass, the sodium hydroxide and the externally added water into a container capable of being sealed, uniformly stirring, and standing for 24 hours to prepare the alkali-activated solution.
Thirdly, preparing the regenerated red brick micro powder, the fly ash, the mineral powder, the fine aggregate and the sodium carbonate according to the mass ratio of the raw materials in the claim 1.
Fourthly, putting the regenerated red brick micro powder, the fly ash, the mineral powder and the fine aggregate into a cement mortar stirrer, and performing dry mixing for 40-60 s to uniformly stir the regenerated red brick micro powder, the fly ash, the mineral powder and the fine aggregate;
and fifthly, sequentially and slowly and uniformly adding the alkali activator and the sodium carbonate into the cement mortar stirrer, and stirring for 30-60 s until the mixture is uniformly mixed.
Sixthly, keeping the prepared regenerated red brick micro powder and the novel coal ash-based geopolymer mortar of the mineral powder in cooperation with the compression strength cube test block, standing for 24 hours in an environment with the temperature of 20 +/-5 ℃, and finally moving to a standard concrete curing chamber for curing, wherein the standard curing period is 3 days and 28 days.
After the curing age is reached, according to the method specified by JGJ/T70-2009 building mortar basic performance test method standard, a test block is taken out for a compression test, and the 28d compression strength and the 3d compression strength of the novel coal ash-based geopolymer mortar of the regenerated red brick micro powder and the mineral powder are 70.14Mpa and 48.54Mpa respectively.
Example 3: the fly ash-based novel geopolymer mortar with the synergy of the recycled red brick micro powder and the mineral powder is prepared from the following raw materials in parts by weight: 112.46kg of regenerated red brick micro powder, 121.89kg of fly ash, 275.88kg of mineral powder, 1269.98kg of fine aggregate, 21.34kg of sodium hydroxide, 151.06kg of water glass, 16.97 of sodium carbonate and 120.64 of additional water, wherein the water-to-gel ratio is 0.42.
The particle size of the regenerated red brick micro powder is less than 0.075mm, the volume density is 2.79g/mm3, and the specific surface area is 440m 2/kg.
The fly ash is F-class and first-class fly ash.
The mineral powder is S95 grade mineral powder.
The fine aggregate comprises natural river sand, the particle size d2 of the fine aggregate is 0.35mm-0.5mm, the fine aggregate is in continuous gradation, the volume density is 1467kg/m3, the water absorption is 4.54%, and the water content is 3.26%.
The fly ash-based novel geopolymer mortar with the cooperation of the recycled red brick micro powder and the mineral powder comprises the following steps:
in the first step, water glass, sodium hydroxide and external water are prepared according to the raw material mass ratio of claim 1.
And step two, putting the water glass, the sodium hydroxide and the externally added water into a container capable of being sealed, uniformly stirring, and standing for 24 hours to prepare the alkali-activated solution.
Thirdly, preparing the regenerated red brick micro powder, the fly ash, the mineral powder, the fine aggregate and the sodium carbonate according to the mass ratio of the raw materials in the claim 1.
Fourthly, putting the regenerated red brick micro powder, the fly ash, the mineral powder and the fine aggregate into a cement mortar stirrer, and performing dry mixing for 40-60 s to uniformly stir the regenerated red brick micro powder, the fly ash, the mineral powder and the fine aggregate;
and fifthly, sequentially and slowly and uniformly adding the alkali activator and the sodium carbonate into the cement mortar stirrer, and stirring for 30-60 s until the mixture is uniformly mixed.
Sixthly, keeping the prepared regenerated red brick micro powder and the novel coal ash-based geopolymer mortar of the mineral powder in cooperation with the compression strength cube test block, standing for 24 hours in an environment with the temperature of 20 +/-5 ℃, and finally moving to a standard concrete curing chamber for curing, wherein the standard curing age is 28 days.
After the curing age is reached, according to the method specified by JGJ/T70-2009 building mortar basic performance test method standard, a test block is taken out for a compression test, and the 28d compression strength and the 3d compression strength of the obtained novel geopolymer mortar based on the fly ash of the regenerated red brick micro powder and the mineral powder are 67.32Mpa and 46.24Mpa respectively.
Example 4: the fly ash-based novel geopolymer mortar with the synergy of the recycled red brick micro powder and the mineral powder is prepared from the following raw materials in parts by weight: 43.13kg of regenerated red brick micro powder, 119.78kg of fly ash, 382.66kg of mineral powder, 1272.14kg of fine aggregate, 23.39kg of sodium hydroxide, 153.11kg of water glass, 18.13kg of sodium carbonate and 101.48kg of additional water, wherein the water-to-glue ratio is 0.36.
The particle size of the regenerated red brick micro powder is less than 0.075mm, the volume density is 2.79g/mm3, and the specific surface area is 440m 2/kg.
The fly ash is C-class and first-class fly ash.
The mineral powder is S105 grade mineral powder.
The fine aggregate comprises natural river sand, the particle size d2 of the fine aggregate is 0.35mm-0.5mm, the fine aggregate is in continuous gradation, the volume density is 1480kg/m3, the water absorption is 4.98%, and the water content is 3.22%.
The fly ash-based novel geopolymer mortar with the cooperation of the recycled red brick micro powder and the mineral powder comprises the following steps:
in the first step, water glass, sodium hydroxide and external water are prepared according to the raw material mass ratio of claim 1.
And step two, putting the water glass, the sodium hydroxide and the externally added water into a container capable of being sealed, uniformly stirring, and standing for 24 hours to prepare the alkali-activated solution.
Thirdly, preparing the regenerated red brick micro powder, the fly ash, the mineral powder, the fine aggregate and the sodium carbonate according to the mass ratio of the raw materials in the claim 1.
Fourthly, putting the regenerated red brick micro powder, the fly ash, the mineral powder and the fine aggregate into a cement mortar stirrer, and performing dry mixing for 40-60 s to uniformly stir the regenerated red brick micro powder, the fly ash, the mineral powder and the fine aggregate;
and fifthly, sequentially and slowly and uniformly adding the alkali activator and the sodium carbonate into the cement mortar stirrer, and stirring for 30-60 s until the mixture is uniformly mixed.
Sixthly, keeping the prepared regenerated red brick micro powder and the novel coal ash-based geopolymer mortar of the mineral powder in cooperation with the compression strength cube test block, standing for 24 hours in an environment with the temperature of 20 +/-5 ℃, and finally moving to a standard concrete curing chamber for curing, wherein the standard curing age is 28 days.
After the curing age is reached, according to the method specified by JGJ/T70-2009 building mortar basic performance test method standard, a test block is taken out for a compression test, and the 28d compression strength and the 3d compression strength of the obtained novel geopolymer mortar based on the fly ash of the regenerated red brick micro powder and the mineral powder are 70.04MPa and 48.02MPa respectively.
Example 5: the fly ash-based novel geopolymer mortar with the synergy of the recycled red brick micro powder and the mineral powder is prepared from the following raw materials in parts by weight: 44.34kg of regenerated red brick micro powder, 121.67kg of fly ash, 352.79kg of mineral powder, 1271.66kg of fine aggregate, 22.15kg of sodium hydroxide, 152.47kg of water glass, 17.66kg of sodium carbonate and 170.06kg of added water, wherein the water-to-glue ratio is 0.51.
The particle size of the regenerated red brick micro powder is less than 0.075mm, the volume density is 2.79g/mm3, and the specific surface area is 440m 2/kg.
The fly ash is C-class and first-class fly ash.
The mineral powder is grade 105 mineral powder.
The fine aggregate comprises natural river sand, the particle size d2 of the fine aggregate is 0.35mm-0.5mm, the fine aggregate is in continuous gradation, the volume density is 1477kg/m3, the water absorption is 5.01%, and the water content is 2.98%.
The fly ash-based novel geopolymer mortar with the cooperation of the recycled red brick micro powder and the mineral powder comprises the following steps:
in the first step, water glass, sodium hydroxide and external water are prepared according to the raw material mass ratio of claim 1.
And step two, putting the water glass, the sodium hydroxide and the externally added water into a container capable of being sealed, uniformly stirring, and standing for 24 hours to prepare the alkali-activated solution.
Thirdly, preparing the regenerated red brick micro powder, the fly ash, the mineral powder, the fine aggregate and the sodium carbonate according to the mass ratio of the raw materials in the claim 1.
Fourthly, putting the regenerated red brick micro powder, the fly ash, the mineral powder and the fine aggregate into a cement mortar stirrer, and performing dry mixing for 40-60 s to uniformly stir the regenerated red brick micro powder, the fly ash, the mineral powder and the fine aggregate;
and fifthly, sequentially and slowly and uniformly adding the alkali activator and the sodium carbonate into the cement mortar stirrer, and stirring for 30-60 s until the mixture is uniformly mixed.
Sixthly, keeping the prepared regenerated red brick micro powder and the novel coal ash-based geopolymer mortar of the mineral powder in cooperation with the compression strength cube test block, standing for 24 hours in an environment with the temperature of 20 +/-5 ℃, and finally moving to a standard concrete curing chamber for curing, wherein the standard curing age is 28 days.
After the curing age is reached, according to the method specified by JGJ/T70-2009 building mortar basic performance test method standard, a test block is taken out for a compression test, and the 28d compression strength and the 3d compression strength of the obtained novel geopolymer mortar based on the fly ash of the regenerated red brick micro powder and the mineral powder are 69.76Mpa and 47.44Mpa respectively.
Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, and that the simple modifications or equivalent substitutions of the technical solutions of the present invention by those of ordinary skill in the art can be made without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A fly ash based novel geopolymer mortar with the cooperation of recycled red brick micro powder and mineral powder is characterized in that: the composite material comprises regenerated red brick micro powder, fly ash, mineral powder, fine aggregate, sodium hydroxide, sodium silicate, sodium carbonate and a certain amount of substances added with water, wherein the mass ratio of the regenerated red brick micro powder, the fly ash, the mineral powder, the fine aggregate, the sodium hydroxide, the sodium silicate, the sodium carbonate and the water is 0.09-0.44: 0.27-0.52: 1: 3.11-4.78: 0.05-0.11: 0.39-0.62: 0.04-0.08: 0.25-0.51, the mass ratio of the sum of the mass of the regenerated red brick micro powder, the fly ash and the mineral powder to the mass of all the water is 0.35-0.52, and the all the water comprises water contained in the water glass and a certain amount of added water.
2. The fly ash-based novel geopolymer mortar of the recycled red brick micro powder and mineral powder according to claim 1, which is characterized in that: the modulus of the water glass is 1.5-3.4.
3. The fly ash-based novel geopolymer mortar of the recycled red brick micro powder and mineral powder according to claim 1, which is characterized in that: the mineral powder is slag powder with the grade not lower than S95 grade.
4. The fly ash-based novel geopolymer mortar of the recycled red brick micro powder and mineral powder according to claim 1, which is characterized in that: the fly ash comprises class C fly ash and class F fly ash, and the grade of the fly ash is first-grade fly ash.
5. The fly ash-based novel geopolymer mortar of the recycled red brick micro powder and mineral powder according to claim 1, which is characterized in that: the fineness of the recycled red brick micro powder reaches RFP-II level and above standards.
6. The fly ash-based novel geopolymer mortar of the recycled red brick micro powder and mineral powder according to claim 1, which is characterized in that: the fineness modulus of the fine aggregate is 1.7-3.2.
7. A method of preparing a screed according to any one of claims 1 to 9 which comprises:
a. preparing an alkali-activated solution from said water glass, sodium hydroxide and all of the external water of claim 1, and allowing to stand for 20-48 hours;
b. putting the mineral powder, the fly ash, the regenerated red brick powder and the fine aggregate into a mortar stirrer, and performing dry stirring to uniformly mix the mineral powder, the fly ash, the regenerated red brick powder and the fine aggregate;
c. and adding the alkali-activated solution and the sodium carbonate after standing into the stirrer respectively, and stirring to uniformly mix the alkali-activated solution and the sodium carbonate, thereby obtaining the mortar.
8. The method of claim 7, wherein the modulus of the alkali-activated solution is 1.4 to 2.2.
9. The method of claim 7, wherein the mixer is a cement mortar mixer.
10. The method according to claim 7, wherein the alkali-activated solution after standing is slowly added first, and then the sodium carbonate is added in step c.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111548068A (en) * | 2020-05-18 | 2020-08-18 | 福州大学 | Single component recycled polymer cement concrete |
| CN112408875A (en) * | 2020-11-06 | 2021-02-26 | 广东工业大学 | Regenerated geopolymer mortar and preparation method and application thereof |
| CN112479674A (en) * | 2020-11-23 | 2021-03-12 | 湖南大学 | Alkali-activated recycled red brick micro powder and slag-based recycled concrete and preparation method thereof |
| CN112592148A (en) * | 2021-01-24 | 2021-04-02 | 湖南科技大学 | Method for preparing structural material by utilizing brick-concrete building solid waste reclaimed sand powder with high doping amount |
| CN113548841A (en) * | 2021-07-28 | 2021-10-26 | 扬州大学 | Composite geopolymer mortar grouting material for reinforcing pavement base and preparation method thereof |
| CN114920506A (en) * | 2022-06-13 | 2022-08-19 | 洛阳绿筑建筑材料有限公司 | Silicon-aluminum based regenerated cementing material and preparation method thereof |
| CN115572103A (en) * | 2022-11-10 | 2023-01-06 | 深圳市华越新材料有限公司 | Light construction waste reclaimed sand and production method thereof |
| CN116283078A (en) * | 2023-01-19 | 2023-06-23 | 长安大学 | Clay brick powder-steel slag-fly ash base polymer material and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111548068A (en) * | 2020-05-18 | 2020-08-18 | 福州大学 | Single component recycled polymer cement concrete |
| CN112408875A (en) * | 2020-11-06 | 2021-02-26 | 广东工业大学 | Regenerated geopolymer mortar and preparation method and application thereof |
| CN112479674A (en) * | 2020-11-23 | 2021-03-12 | 湖南大学 | Alkali-activated recycled red brick micro powder and slag-based recycled concrete and preparation method thereof |
| CN112592148A (en) * | 2021-01-24 | 2021-04-02 | 湖南科技大学 | Method for preparing structural material by utilizing brick-concrete building solid waste reclaimed sand powder with high doping amount |
| CN112592148B (en) * | 2021-01-24 | 2022-06-28 | 湖南科技大学 | Method for preparing structural material by utilizing brick-concrete building solid waste reclaimed sand powder with high doping amount |
| CN113548841A (en) * | 2021-07-28 | 2021-10-26 | 扬州大学 | Composite geopolymer mortar grouting material for reinforcing pavement base and preparation method thereof |
| CN114920506A (en) * | 2022-06-13 | 2022-08-19 | 洛阳绿筑建筑材料有限公司 | Silicon-aluminum based regenerated cementing material and preparation method thereof |
| CN115572103A (en) * | 2022-11-10 | 2023-01-06 | 深圳市华越新材料有限公司 | Light construction waste reclaimed sand and production method thereof |
| CN116283078A (en) * | 2023-01-19 | 2023-06-23 | 长安大学 | Clay brick powder-steel slag-fly ash base polymer material and preparation method thereof |
| CN116283078B (en) * | 2023-01-19 | 2024-01-09 | 长安大学 | Clay brick powder-steel slag-fly ash base polymer material and preparation method thereof |
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