CN113716920A - Foam concrete wall material with industrial waste replacing cement in large proportion - Google Patents
Foam concrete wall material with industrial waste replacing cement in large proportion 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland 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
- 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
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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
- 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
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
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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
- 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
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
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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
- 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
- C04B22/12—Acids or salts thereof containing halogen in the anion
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
- C04B24/14—Peptides; Proteins; Derivatives thereof
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/40—Compounds containing silicon, titanium or zirconium or other organo-metallic compounds; Organo-clays; Organo-inorganic complexes
- C04B24/42—Organo-silicon compounds
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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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
- 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
Abstract
The invention discloses a high-performance foam concrete wall material prepared by mixing multiple industrial wastes and replacing cement in a large proportion and a preparation method thereofThe preparation method comprises the following steps of preparing the foamed concrete wall material per cubic meter: cement 200-400kg/m3460-flyash 660kg/m360-140kg/m of slag340-50kg/m stone powder3300 kg/m of water36-14kg/m of foaming agent3Foam stabilizer 0.96-2.24kg/m32-4kg/m of water reducing agent326-34kg/m of activator3696g/m waterproofing agent2. The invention adopts the pollution-free animal protein foaming agent and the HPMC foam stabilizer, so that the foam concrete is green and environment-friendly and has good foam stability, simultaneously, various industrial wastes are used for replacing cement with the content of up to 70 percent, and CQJ-JSS type polycarboxylate superplasticizer and 3 percent ferric chloride activator are utilized to prepare the high-performance foam concrete, the flexural strength and the compressive strength of the high-performance foam concrete reach 0.7MPa and 3.77MPa, the high-performance foam concrete is respectively improved by 48.9 percent and 35.6 percent compared with the corresponding cement-based foam concrete, the mass water absorption is less than 10 percent, the heat conductivity coefficient is less than 0.1W/(m.K), and various indexes of the light partition board of the foam concrete are met.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a high-performance foam concrete wall material prepared by mixing multiple industrial wastes in a large proportion to replace cement and a preparation method thereof.
Background
The foam concrete is a light concrete material which contains closed air holes and has certain strength and is formed through maintenance after gas is introduced into a matrix material by a physical or chemical foaming method, and the foam concrete is mixed with water and an additive and poured, has excellent performances of light weight, heat insulation, earthquake resistance, low elastic modulus and the like, and can be used as a wall material in buildings.
Carbon emissions from the construction industry account for 29% of the total carbon emissions from human activities, most of which are generated during cement manufacturing. Meanwhile, a large amount of industrial waste materials are produced in industrial production and accumulated everywhere, so that great pressure is brought to environmental protection. Therefore, it is a trend to replace cement with industrial waste materials in building materials to save energy and protect environment. However, in the past, fly ash is mostly used to partially replace cement, but in recent years, the cost of fly ash is increased due to the rising price of fly ash, and other types of industrial waste materials, such as stone powder common in southern China, cannot be fully consumed and utilized. On the other hand, the replacement rate of the foam concrete cement in the industry is generally less than 55 percent at present, the using amount of the building wall material is extremely large, the replacement rate of the cement is improved to a small extent, so that the huge using amount of the cement can be saved, the huge carbon emission and waste gas pollution generated by cement production can be avoided, and the problem of environmental pollution in the preparation of the foam concrete is solved to a great extent. In addition, previous researches show that after the proportion of the fly ash reaches a certain limit value, the strength of the foam concrete is obviously reduced along with the increase of the mixing amount of the fly ash, and if the cement substitution rate of the foam concrete is required to be continuously improved under the condition of not obviously reducing the material performance, a large amount of creative labor and strict repeated tests are required to obtain a scientific and reasonable material formula. Therefore, the development of high-performance foamed concrete in which a large proportion of various industrial wastes collectively replace cement is expected to produce significant ecological and economic benefits.
The key technical problem that how to ensure that the foam concrete wall material has higher strength and better performance is urgently needed to be solved is to simultaneously mix a plurality of industrial wastes, particularly to ensure that the foam concrete wall material has higher strength and better performance under the condition of replacing cement in a large proportion. In addition, the traditional foam concrete adopts a chemical foaming agent which can cause irreversible pollution to the environment, animal protein is a bio-based component, and the animal protein foaming agent is used for replacing the traditional inorganic foaming agent, so that a great amount of environmental pollution can be avoided. Therefore, under the condition of keeping the high performance of the foam concrete, a plurality of industrial wastes are combined with the animal protein foaming agent instead of cement in a large proportion, so that a remarkable ecological superposition effect is generated, and the environment-friendly high-performance foam concrete is prepared.
Disclosure of Invention
The invention aims to provide a high-performance foam concrete wall material prepared by mixing multiple industrial wastes in a large proportion to replace cement and a preparation method thereof. A large amount of various industrial wastes are used as main cementing materials instead of cement, so that the foam concrete has higher strength, lower heat conductivity coefficient and water absorption rate while the industrial wastes are fully utilized.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-performance foam concrete wall material prepared by mixing multiple industrial wastes in a large proportion to replace cement comprises the following components per cubic meter:
cement 200-400kg/m3；
Fly ash 460-660kg/m3；
Slag 60-140kg/m3；
40-50kg/m stone powder3；
Water 300-500kg/m3；
6-14kg/m of foaming agent3；
Foam stabilizer 0.96-2.24kg/m3；
2-4kg/m of water reducing agent3；
26-34kg/m of activating agent3；
Water repellent agent 696g/m2。
The cement is ordinary portland cement. By adopting the technical scheme, the ordinary portland cement has good workability, quick hardening, high early strength, frost resistance, wear resistance and strong impermeability. And the common Portland cement has compact structure and good frost resistance. Is suitable for the engineering of repeated freeze thawing in severe cold areas and the engineering with higher freezing resistance requirement.
The fly ash is second-grade fly ash, and the balance of a 45-micrometer square-hole sieve is not more than 25%. By adopting the technical scheme, the addition of the fly ash can improve the fine aggregate effect and the chemical activity effect, prevent the mutual cohesion of cement particles, ensure that the cement particles are in a dispersed state and are beneficial to the proceeding of hydration reaction, further reduce the using amount of water, improve the workability of concrete, improve the later strength of the concrete, enhance the impact resistance, the impermeability and the frost resistance of the concrete, and save a large amount of cement.
The slag is S95 grade slag, the specific surface area reaches more than 400, and the activity index reaches more than 95. By adopting the technical scheme, the addition of the slag can improve the fine aggregate effect and the chemical activity effect, so that the impermeability and the corrosion resistance of the concrete are improved, the cement is saved, the cost is reduced, and the pollution is reduced.
The stone powder is waste stone powder of stone processing plants in the south of Fujian Min. By adopting the technical scheme, the hydration process is accelerated by the incorporation of the stone powder, and the early strength of the concrete is facilitated. The waste stone powder is utilized, the problem of serious pollution of stone processing waste in southern areas can be solved, and the cost of raw materials can be further saved.
The foaming agent is an animal protein foaming agent, the main components are powdery cow hoof horn powder and calcium hydroxide, and the pH value is as follows: 7-9 (1% aqueous solution), foaming power: not less than 180mm (Roche foam instrument), foam stability: 170mm (after 5 minutes), half life of liquid level: not less than 4 minutes (magnetic stirring measuring cylinder method). By adopting the technical scheme, when the dilution factor of the animal protein foaming agent is 1: at 20, the binding capacity of the active molecules is reduced, the cohesive force in the solution is increased, the force can balance the stress of the formed foam to reach a balance point, and the foam is kept stable for a long time, so that the foam-bath stability of the foam-bath concrete is the best.
The foam stabilizer is HPMC foam stabilizer, the methoxy group content is 19.0-30.0%, the hydroxypropoxyl group content is 4.0-12.0%, the pH value is 4.8-8.0, and the fineness is more than 95%. By adopting the technical scheme, when the mixing amount of the HPMC is 0.16%, the HPMC can thicken and retain water, reduce the surface tension of a foaming agent solution, reduce the pressure on a liquid film formed by foam, prolong the time for keeping the foam stable, and most effectively reduce the settling distance and the bleeding amount of the foam.
The water reducing agent is a CQJ-JSS type polycarboxylic acid water reducing agent. By adopting the technical scheme, the workability and the fluidity of the concrete can be effectively improved after the water reducing agent is added, the concrete structure is improved, the strength is improved, and a large amount of cement can be saved while the strength of the concrete is kept unchanged.
The activator is 3wt.% ferric chloride activator. By adopting the technical scheme, the Cl provided by the ferric chloride activator with the concentration of 3 percent-And Fe3 +The coal ash-cement composite material can promote the hydration reaction of the coal ash-cement to generate a stable hydration product, is beneficial to improving the compressive strength, and is equivalent to the effect of double activation for the coal ash.
The waterproof agent is silicone oil. By adopting the technical scheme, as the oily silicone oil has strong hydrophobicity, when the silicone oil permeates into the surfaces of the pores of the foam concrete, a hydrophobic protective film can be formed to prevent water from entering the pores of the foam concrete. Thereby effectively improving the waterproofness of the foam concrete.
The preparation method comprises the following steps:
1) uniformly and dryly stirring cement, fly ash, slag and stone powder for 1 min;
2) the foam stabilizer HPMC is poured into the foaming agent, and the doping amount of the HPMC is 0.16 percent. Dissolving a CQJ-JSS type polycarboxylate superplasticizer and 3% ferric chloride activator in water according to a ratio, stirring for 1min by using a glass rod, pouring into dry materials, slowly stirring for 60s, and then quickly stirring for 30s to obtain gelled slurry;
3) pouring the animal protein foaming agent diluted with water in a ratio of 1:20 into a foaming machine, preparing a certain amount of foam through mechanical foaming, adding the foam into the gelled slurry according to the density requirement, stirring to form foam concrete slurry, slowly stirring for 3min, and then quickly stirring for 1 min;
4) pouring the foam concrete slurry into a mold coated with oil, slightly vibrating by using a spoon and scraping the surface by using a scraper in order to prevent foam from breaking without mechanical vibration after pouring into the mold;
5) the foam concrete has low strength and slow hardening speed, and needs to be protected within 24 hours after pouring is finished, and articles and the like are not strictly pressed on the foam concrete. After 48 hours, removing the mold, then putting the foam concrete test block into a numerical control cement concrete curing box for curing to a specified period, and taking out;
6) and after taking out the foam concrete test block, coating silicone oil on the surface of the test block, and uniformly and back-and-forth coating the surface of the test block along different directions in the coating process so that the silicone oil can permeate into the test block.
The invention has the beneficial effects that:
(1) the common Portland cement is used, so that the frost resistance and the impermeability of the concrete are effectively improved.
(2) A large amount of fly ash is doped to replace most of cement, so that the use amount of the cement is effectively reduced, the carbon emission of mass production of the cement is avoided while the high performance of the material is ensured, the cost is saved, and the economic and ecological environmental protection benefits are remarkable. The cement is replaced by the high-proportion cement, the water consumption is reduced, the workability of the concrete is improved, and the impact resistance, the impermeability and the frost resistance of the concrete are effectively improved.
(3) The slag is added, so that the cement consumption is reduced, industrial waste is reasonably utilized, the cost is saved, and the impermeability and corrosion resistance of the concrete are effectively improved.
(4) The waste stone powder is added, so that the use amount of a part of cement is reduced, the industrial waste is reasonably utilized, the cost is saved, and the hydration process is accelerated.
(5) The animal protein foaming agent is combined with a method of replacing cement by various industrial wastes in a large proportion, so that the foam stability of the foam concrete is improved, and the environmental pollution problem of material preparation is obviously optimized.
(6) The 3% ferric chloride activator is adopted to promote the hydration reaction of the fly ash and the cement and improve the compressive strength of the concrete.
(7) The silicon oil is used as a waterproof agent, and the water absorption of the foam concrete is effectively improved due to the hydrophobicity of the silicon oil.
Drawings
FIG. 1 is a flow chart of the preparation of high-performance foam concrete wall material by mixing multiple industrial wastes in a large proportion to replace cement.
FIG. 2 is a graph showing the effect of varying the amount of slag on the strength of the foamed concrete at a 56% fly ash loading: (a) the breaking strength; (b) and (3) compressive strength.
FIG. 3 is a graph showing the effect of varying the amount of stone powder on the strength of the foam concrete at 56% fly ash: (a) the breaking strength; (b) and (3) compressive strength.
FIG. 4 is an electron micrograph of three foamed concrete: (a) cement-based foam concrete; (b) 70% of fly ash and 30% of cement are used as the foam concrete of the gelled material; (c) 56% of fly ash, 10% of slag, 4% of stone powder and 30% of cement are used as cementing materials.
FIG. 5 is a graph showing the influence of silicone oil on the mass water absorption of CM-type foam concrete.
Detailed Description
In order to make the present invention more comprehensible, the technical solutions of the present invention are further described below with reference to specific embodiments, but the present invention is not limited thereto.
All materials referred to in the examples of the present invention are commercially available.
Example 1 (hereinafter, abbreviated as S1):
a high-performance foam concrete wall material prepared by mixing multiple industrial wastes in a large proportion to replace cement comprises the following components:
cement 200-400kg/m3；
Fly ash 460-660kg/m3；
Slag 60-140kg/m3；
40-50kg/m stone powder3；
Water 300-500kg/m3；
6-14kg/m of foaming agent3；
2-4kg/m of water reducing agent3；
26-34kg/m of activating agent3。
Examples 2 to 6 (hereinafter referred to as S2-S6) differ from S1 in the weight of each raw material, as shown in Table 1 below.
In the embodiments of the invention, the high-performance foam concrete prepared by mixing the multi-industrial wastes in a large proportion replaces cement, and the common Portland cement is adopted to ensure that the concrete has good frost resistance, wear resistance and permeability resistance. The A06-grade foam concrete prepared by taking 56% of doped fly ash as a main cementing material and doping 10% of slag and 4% of stone powder to replace 70% of cement optimizes various performances, and the high-doped fly ash foam concrete provided by the invention has the advantages that the compressive strength is over 3MPa, the mass water absorption is less than 10%, the heat conductivity coefficient is less than 0.1W/(m.K), and the index requirements of building wall materials are met. The highest flexural strength and the highest compressive strength of the foam concrete provided by the invention are respectively 0.7MPa and 3.77MPa, and are respectively increased by 48.9 percent and 35.6 percent compared with the corresponding foam concrete which totally adopts cement as a raw material.
The preparation method of the high-performance foam concrete wall material with a plurality of industrial wastes mixed to replace cement in a large proportion is shown in the following figure 1.
At the mixing amount of 56% of fly ash, the effect of changing the mixing amount of slag on the strength of the foam concrete is shown in the following figure 2, and it can be seen that when the mixing amount of slag exceeds 10%, the flexural strength of 7d and 28d is rapidly reduced, namely the mixing amount of slag is not more than 10%. Meanwhile, when the slag mixing amount is 10%, the compressive strength of 7d and 28d is the maximum value, namely 2.85MPa and 3.67MPa respectively, and the growth rate is 54.1% and 11.9% respectively, which shows that the slag has a remarkable effect of improving the early strength of the foam concrete.
At the blending amount of 56% of fly ash, the effect of changing the blending amount of the mountain flour on the strength of the foam concrete is shown in the following figure 3, and it can be seen that when the blending amount of the mountain flour is 4%, the flexural strength of 7d and 28d reaches the maximum value, which is 0.77MPa and 0.93MPa respectively. At the same time, the compressive strengths of 7d and 28d reached maximum values of 2.18MPa and 3.34MPa, respectively.
The results of electron microscope scanning of three kinds of foam concrete (100% cement, 70% fly ash +30% cement, 56% fly ash +10% slag +4% stone powder +30% cement) are shown in fig. 4. Therefore, compared with two types of foam concrete comprising 100% of cement, 70% of fly ash and 30% of cement, the foam concrete taking 56% of fly ash, 10% of slag, 4% of stone powder and 30% of cement as cementing materials is doped with the slag and the stone powder, so that the porosity of the foam concrete is obviously reduced, the fine pores are more, and stable needle-shaped objects are formed in generated hydration products, thereby effectively improving the performance indexes such as the strength and the like of the foam concrete.
As shown in FIG. 5, the effect of silicone oil on the mass water absorption of CM-type foam concrete is shown when the coating amount is 174g/m2，348g/m2，522g/m2，696g/m2When the concrete is used, the water absorption rate of the 56 percent-doped fly ash foam concrete in 1 hour is only 6.50 percent, 9.26 percent and 9.79 percent of the final saturated water absorption rate, wherein when the coating amount is 696g/m2When the water absorption rate reaches the minimum value, the mass water absorption rate is 7.66%.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (10)
1. A high-performance foam concrete wall material with multiple industrial wastes mixed to replace cement in a large proportion is characterized in that: the foamed concrete wall material comprises the following components per cubic meter:
cement 200-400kg/m3；
Fly ash 460-660kg/m3；
Slag 60-140kg/m3；
40-50kg/m stone powder3；
Water 300-500kg/m3；
6-14kg/m of foaming agent3；
Foam stabilizer 0.96-2.24kg/m3；
2-4kg/m of water reducing agent3；
26-34kg/m of activating agent3；
Water repellent agent 696g/m2。
2. The foamed concrete wall material according to claim 1, wherein: the cement is ordinary portland cement.
3. The foamed concrete wall material according to claim 1, wherein: the fly ash is second-grade fly ash, and the balance of a 45-micrometer square-hole sieve is not more than 25%.
4. The foamed concrete wall material according to claim 1, wherein: the slag is S95 grade slag, the specific surface area reaches more than 400, and the activity index reaches more than 95.
5. The foamed concrete wall material according to claim 1, wherein: the foaming agent is an animal protein foaming agent, and mainly comprises powdery cow hoof powder and calcium hydroxide.
6. The foamed concrete wall material according to claim 1, wherein: the foam stabilizer is HPMC foam stabilizer, the methoxy group content is 19.0-30.0%, the hydroxypropoxyl group content is 4.0-12.0%, the pH value is 4.8-8.0, and the fineness is more than 95%.
7. The foamed concrete wall material according to claim 1, wherein: the water reducing agent is a CQJ-JSS type polycarboxylic acid water reducing agent.
8. The foamed concrete wall material according to claim 1, wherein: the activator is 3wt.% ferric chloride activator.
9. The foamed concrete wall material according to claim 1, wherein: the waterproof agent is silicone oil.
10. A method of preparing the high performance cellular concrete wall material of claim 1 with a combination of multi-industrial waste and a large percentage of replacement cement, characterized by: the method comprises the following steps:
1) uniformly and dryly stirring cement, fly ash, slag and stone powder for 1 min;
2) mixing a water reducing agent, an activating agent and water, stirring for 1min, pouring into a dry material, slowly stirring for 60s, and then quickly stirring for 30s to obtain gelled slurry;
3) pouring a foam stabilizer into a foaming agent, adding water to dilute the foam stabilizer by 20 times, mechanically foaming, adding the obtained foam into the gelled slurry, slowly stirring for 3min, and then quickly stirring for 1min to obtain foam concrete slurry;
4) pouring, maintaining for more than 48h, and coating a waterproof agent on the surface.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115838263A (en) * | 2022-11-11 | 2023-03-24 | 安徽省公路桥梁工程有限公司 | High-strength light foam soil and preparation method thereof |
| CN117185729A (en) * | 2023-09-27 | 2023-12-08 | 烟台三力轻质混凝土科技有限公司 | Manufacturing method of lightweight concrete partition plate |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6488762B1 (en) * | 2000-10-30 | 2002-12-03 | Advanced Materials Technologies, Llc | Composition of materials for use in cellular lightweight concrete and methods thereof |
| CN103304193A (en) * | 2013-06-19 | 2013-09-18 | 河南华泰建材开发有限公司 | Lightweight aggregate foam concrete and production method thereof |
| CN104446603A (en) * | 2014-11-07 | 2015-03-25 | 中冶武汉冶金建筑研究院有限公司 | High-volume coal ash ceramsite foam concrete and preparation method thereof |
| CN105272137A (en) * | 2015-10-09 | 2016-01-27 | 中建商品混凝土成都有限公司 | Alkali activated phosphorus slag micropowder light foam concrete thermal insulation board and preparation method thereof |
| KR101646519B1 (en) * | 2015-12-24 | 2016-08-09 | (주)삼표산업 | A Manufacturing Method of Foamed Concrete for Radiant Heating Floor Panel |
| CN106116431A (en) * | 2015-12-17 | 2016-11-16 | 长安大学 | A kind of preparation method of magnesia oxychloride cement foam concrete wall insulation material |
| CN107162638A (en) * | 2017-06-05 | 2017-09-15 | 合肥聪亨新型建材科技有限公司 | A kind of new water repellent and preparation method thereof |
| CN107673696A (en) * | 2017-10-26 | 2018-02-09 | 陈宗熙 | A kind of foam concrete self-insulating wall material and preparation method thereof |
| CN109133695A (en) * | 2018-10-12 | 2019-01-04 | 四川绵筑新材料有限公司 | A kind of phosphorus building gypsum plastering mortar waterproof admixture and its application method |
| CN110218032A (en) * | 2019-05-31 | 2019-09-10 | 南京航空航天大学 | A kind of high-strength heat preservation waterproof foam concrete and preparation method thereof |
| CN112851255A (en) * | 2021-02-06 | 2021-05-28 | 呼伦贝尔学院 | Self-heat-insulation building material for high and cold areas and preparation method |
| CN113264717A (en) * | 2021-06-11 | 2021-08-17 | 东北大学 | Large-mixing-amount solid waste base-activated foam concrete and preparation method thereof |
-
2021
- 2021-10-20 CN CN202111222692.0A patent/CN113716920A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6488762B1 (en) * | 2000-10-30 | 2002-12-03 | Advanced Materials Technologies, Llc | Composition of materials for use in cellular lightweight concrete and methods thereof |
| CN103304193A (en) * | 2013-06-19 | 2013-09-18 | 河南华泰建材开发有限公司 | Lightweight aggregate foam concrete and production method thereof |
| CN104446603A (en) * | 2014-11-07 | 2015-03-25 | 中冶武汉冶金建筑研究院有限公司 | High-volume coal ash ceramsite foam concrete and preparation method thereof |
| CN105272137A (en) * | 2015-10-09 | 2016-01-27 | 中建商品混凝土成都有限公司 | Alkali activated phosphorus slag micropowder light foam concrete thermal insulation board and preparation method thereof |
| CN106116431A (en) * | 2015-12-17 | 2016-11-16 | 长安大学 | A kind of preparation method of magnesia oxychloride cement foam concrete wall insulation material |
| KR101646519B1 (en) * | 2015-12-24 | 2016-08-09 | (주)삼표산업 | A Manufacturing Method of Foamed Concrete for Radiant Heating Floor Panel |
| CN107162638A (en) * | 2017-06-05 | 2017-09-15 | 合肥聪亨新型建材科技有限公司 | A kind of new water repellent and preparation method thereof |
| CN107673696A (en) * | 2017-10-26 | 2018-02-09 | 陈宗熙 | A kind of foam concrete self-insulating wall material and preparation method thereof |
| CN109133695A (en) * | 2018-10-12 | 2019-01-04 | 四川绵筑新材料有限公司 | A kind of phosphorus building gypsum plastering mortar waterproof admixture and its application method |
| CN110218032A (en) * | 2019-05-31 | 2019-09-10 | 南京航空航天大学 | A kind of high-strength heat preservation waterproof foam concrete and preparation method thereof |
| CN112851255A (en) * | 2021-02-06 | 2021-05-28 | 呼伦贝尔学院 | Self-heat-insulation building material for high and cold areas and preparation method |
| CN113264717A (en) * | 2021-06-11 | 2021-08-17 | 东北大学 | Large-mixing-amount solid waste base-activated foam concrete and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115838263A (en) * | 2022-11-11 | 2023-03-24 | 安徽省公路桥梁工程有限公司 | High-strength light foam soil and preparation method thereof |
| CN117185729A (en) * | 2023-09-27 | 2023-12-08 | 烟台三力轻质混凝土科技有限公司 | Manufacturing method of lightweight concrete partition plate |
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