CN113264719A - Ground polymer-based foam concrete for roads and preparation method thereof - Google Patents
Ground polymer-based foam concrete for roads and preparation method thereof Download PDFInfo
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- CN113264719A CN113264719A CN202110655004.3A CN202110655004A CN113264719A CN 113264719 A CN113264719 A CN 113264719A CN 202110655004 A CN202110655004 A CN 202110655004A CN 113264719 A CN113264719 A CN 113264719A
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- geopolymer
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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
- C04B28/006—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
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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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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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
Abstract
The invention discloses a polymer-based foam concrete for roads and a preparation method thereof, wherein the concrete comprises the following components in parts by weight: 100 parts of a gelling raw material, 5-10 parts of an alkali activator, 50-60 parts of water, 0.2-0.4 part of a foaming agent and 0.02-0.05 part of a foam stabilizer, wherein the gelling raw material comprises cement and a silicon-aluminum raw material, and the mass ratio of the cement to the silicon-aluminum raw material is 3: 1-1: 1. The invention combines the advantages of geopolymer and foam concrete, and optimizes the formula, so that the concrete has the advantages of light weight, heat resistance, good stability, good fluidity and high compressive strength which is far greater than the standard strength (0.6MPa), and is particularly suitable for road pavement. The preparation method is simple, short in construction time, simple and easily available in materials, capable of utilizing solid wastes, saving resources and reducing cost.
Description
Technical Field
The invention belongs to the technical field of concrete, and particularly relates to geopolymer-based foam concrete for roads and a preparation method thereof.
Background
The existing roads are mostly made of cement concrete, and the cement concrete has the advantages of high strength, good stability, no aging phenomenon and good durability. However, the demand for cement and water is large, and the pollution in the cement production process is serious. Therefore, concrete prepared by taking geopolymer or composite material thereof as cementing material appears, and the high temperature resistance, the durability and the like of the concrete are superior to those of the traditional cement concrete material. And the geopolymer can take waste materials in industrial production as raw materials, thereby being beneficial to solid waste recovery and avoiding large consumption of resources and energy sources in the cement production process. Foam concrete is a building material which is popular in the field of buildings in recent years due to excellent characteristics of light weight, heat preservation, heat insulation, fire resistance, sound insulation, freezing resistance and the like, but the foam concrete is generally low in strength. Therefore, how to adjust the raw material formula, combining the advantages of geopolymer and foam concrete, and expanding the application range has important significance.
Disclosure of Invention
The invention aims to overcome the defects and provides the polymer-based foam concrete for the road and the preparation method thereof, and the concrete has light weight, good heat resistance, good stability, good fluidity and high compressive strength by optimizing the formula, and is particularly suitable for road pavement.
In order to realize the purpose, the invention is realized by the following technical scheme:
a polymer-based foam concrete for road pavement comprises the following components in parts by weight:
100 parts of a gelling raw material, 5-10 parts of an alkali activator, 50-60 parts of water, 0.2-0.4 part of a foaming agent and 0.02-0.05 part of a foam stabilizer, wherein the gelling raw material comprises cement and a silicon-aluminum raw material, and the mass ratio of the cement to the silicon-aluminum raw material is 3: 1-1: 1.
Preferably, the concrete comprises the following components in parts by weight:
100 parts of a gelling raw material, 6-8 parts of an alkali activator, 50-55 parts of water, 0.3-0.35 part of a foaming agent and 0.03-0.05 part of a foam stabilizer, wherein the gelling raw material comprises cement and a silicon-aluminum raw material, and the mass ratio of the cement to the silicon-aluminum raw material is 3: 1.
Preferably, the silicon-aluminum raw material comprises fly ash and S95 mineral powder, and the mass ratio of the fly ash to the S95 mineral powder is 2-3: 1. The fly ash contains a large amount of metal elements such as silicon, iron, aluminum, calcium and the like and various trace elements, has higher strength and hardness with mineral powder, and improves the compressive strength, the wear resistance and the durability of concrete. Meanwhile, because the specific surface area of the fly ash is huge and the adsorption capacity is strong, the fly ash particles can adsorb alkali in the cement and react with the alkali to consume the alkali. The reduction in the amount of free base may inhibit or reduce the alkali-aggregate reaction.
Preferably, the alkali activator is water glass, and the modulus is 2.0; the activity of the silica-alumina raw material is activated by the water glass, so that the strength of the concrete is improved.
Preferably, the foaming agent is a surfactant foaming agent, preferably AOS (alpha-olefin sodium sulfonate) powder, replaces the existing hydrogen peroxide with tighter control, and is cheap and easy to obtain.
Preferably, the foam stabilizer is calcium stearate. Can adsorb at the gas-liquid interface of bubble, the structural stability of control bubble liquid film, and the steady bubble effect is obvious, and convenient to use is particularly useful for AOS's steady bubble.
The preparation method of the polymer-based foam concrete for the road comprises the following steps:
mixing the active substance and alkali activator, stirring, and making into geopolymer gel;
mixing cement and geopolymer gel, adding water and stirring to obtain a gelled material slurry;
adding a foaming agent into water for dilution and foaming to prepare foam, and adding a foam stabilizer;
and mixing the foam and the gelled material slurry, uniformly stirring to obtain foam concrete slurry, and then pouring and maintaining to obtain the geopolymer-based foam concrete.
Preferably, the foaming agent is diluted by 20-22 times, and the density of the prepared foam is 45-60 Kg/m3。
Preferably, the water-to-glue ratio in the preparation process is 1: 2-2: 3.
Compared with the prior art, the invention has the beneficial effects that:
(1) the geopolymer-based foam concrete for the road combines the advantages of geopolymers and foam concrete, and the concrete has the advantages of light weight, heat resistance, good stability, good fluidity and high compressive strength which is far greater than the standard strength (0.6MPa) by optimizing the formula, and is particularly suitable for road paving.
(2) The preparation method disclosed by the invention is simple, short in construction time, simple and easily available in materials, capable of utilizing solid wastes, saving resources and reducing cost.
Drawings
FIG. 1 is a sectional view of a specimen of the geopolymer-based foamed concrete prepared in example 1 at an electron microscope magnification of 200 times.
Detailed Description
Preferred embodiments of the present invention will be described in more detail with reference to specific examples.
Example 1
A polymer-based foam concrete for road is prepared by the following steps:
mixing and stirring 74.14Kg of fly ash, 31.77Kg of S95 mineral powder and 34.35Kg of water glass (instant sodium silicate, modulus 2.0, mixing amount 7.5%) to prepare geopolymer gel;
317.74Kg of cement is mixed with the geopolymer gel, 229Kg of water is added and stirred, and gelled material slurry is obtained;
adding 1.26Kg of AOS powder (alpha-olefin sodium sulfonate) into water, diluting by 20 times, foaming to prepare foam, simultaneously adding 0.229Kg of calcium stearate to stabilize the foam, wherein the foam density is 45-60 Kg/m3；
And mixing the foam and the gelled material slurry, uniformly stirring to obtain foam concrete slurry, and then pouring and maintaining to obtain the geopolymer-based foam concrete.
The cross-sectional view of the polymer-based foam concrete prepared in this example is shown in FIG. 1, which is observed under an electron microscope at 200 times magnification.
Example 2
A polymer-based foam concrete for road is prepared by the following steps:
148.28Kg of fly ash and 63.55Kg of S95 mineral powder are mixed and stirred with 34.35Kg of water glass (instant sodium silicate, modulus 2.0, content 7.5%) to prepare geopolymer gel;
211.83Kg of cement is mixed with the geopolymer gel, 229Kg of water is added and stirred, and gelled material slurry is obtained;
adding 1.38Kg of AOS powder (alpha-olefin sodium sulfonate) into water, diluting by 20 times, foaming to prepare foam, and simultaneously adding 0.229Kg of calcium stearate to stabilize the foam, wherein the foam density is 45-60 Kg/m3；
And mixing the foam and the gelled material slurry, uniformly stirring to obtain foam concrete slurry, and then pouring and maintaining to obtain the geopolymer-based foam concrete.
Comparative example 1
A common foam concrete is prepared by the following method:
adding 229Kg of water into 458Kg of cement, and stirring to obtain a gelled material slurry;
adding 1.47Kg of AOS powder (alpha-olefin sodium sulfonate) into water, diluting by 20 times, foaming to prepare foam, simultaneously adding 0.229Kg of calcium stearate to stabilize the foam, wherein the foam density is 45-60 Kg/m3；
And mixing the foam and the gelled material slurry, uniformly stirring to obtain foam concrete slurry, and then pouring and maintaining to obtain the foam concrete slurry.
Comparative example 2
A polymer-based foam concrete for road use, which does not adopt cement, has the use amount of 296.65Kg of fly ash and 127.10Kg of S95 mineral powder, and has the same method as that of example 3.
Comparative example 3
A polymer-based foam concrete for road is prepared by the following steps:
222.41Kg of fly ash and 95.32Kg of S95 mineral powder are mixed and stirred with 34.35Kg of water glass (instant sodium silicate, modulus 2.0, mixing amount 7.5%) to prepare geopolymer gel;
105.91Kg of cement is mixed with the geopolymer gel, 229Kg of water is added and stirred, and gelled material slurry is obtained;
adding 1.37Kg of AOS powder (alpha-olefin sodium sulfonate) into water, diluting by 20 times, foaming to prepare foam, simultaneously adding 0.229Kg of calcium stearate to stabilize the foam, wherein the foam density is 45-60 Kg/m3；
And mixing the foam and the gelled material slurry, uniformly stirring to obtain foam concrete slurry, and then pouring and maintaining to obtain the geopolymer-based foam concrete.
The concrete prepared in the above examples and comparative examples was examined and the results are shown in table 1.
TABLE 1 comparison of concrete Properties prepared in examples and comparative examples
As can be seen from the above table, the density of the geopolymer-based foam concrete prepared by the embodiment of the invention is far less than that of common foam concrete, the requirement of light weight is met, resources are saved, the strength of the geopolymer-based foam concrete is greater than the standard strength, the requirement of road pavement is met, the fluidity is good, the geopolymer-based foam concrete is beneficial to pumping, and the production and construction are convenient. According to comparative examples 2 and 3, it can be seen that the higher the amount of geopolymer used, the better the strength of the geopolymer, and the invention optimizes the formulation according to the overall performance of various aspects.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and technical principles of the described embodiments, and such modifications and variations should also be considered as within the scope of the present invention.
Claims (10)
1. The polymer-based foam concrete for the road is characterized by comprising the following components in parts by weight:
100 parts of a gelling raw material, 5-10 parts of an alkali activator, 50-60 parts of water, 0.2-0.4 part of a foaming agent and 0.02-0.05 part of a foam stabilizer, wherein the gelling raw material comprises cement and a silicon-aluminum raw material, and the mass ratio of the cement to the silicon-aluminum raw material is 3: 1-1: 1.
2. The geopolymer-based foam concrete for roads of claim 1, characterized in that the concrete comprises the following components in parts by weight:
100 parts of a gelling raw material, 6-8 parts of an alkali activator, 50-55 parts of water, 0.3-0.35 part of a foaming agent and 0.03-0.05 part of a foam stabilizer, wherein the gelling raw material comprises cement and a silicon-aluminum raw material, and the mass ratio of the cement to the silicon-aluminum raw material is 3: 1.
3. The geopolymer-based foam concrete for the road according to claim 1 or 2, wherein the silica-alumina raw material comprises fly ash and S95 mineral powder, and the mass ratio of the fly ash to the S95 mineral powder is 2-3: 1.
4. The geopolymer-based foamed concrete for roads according to claim 1 or 2, characterized in that the alkali-activator is water glass and has a modulus of 2.0.
5. The geopolymer-based foamed concrete for roads according to claim 1 or 2, characterized in that said foaming agent is a surfactant-based foaming agent.
6. The geopolymer-based foamed concrete for roads of claim 5, wherein said foaming agent is AOS powder.
7. The geopolymer-based foamed concrete for roads of claim 1 or 2, characterized in that said foam stabilizer is calcium stearate.
8. A method for producing a geopolymer-based foamed concrete for roads according to claim 1 or 2, characterized by comprising the steps of:
mixing the active substance and alkali activator, stirring, and making into geopolymer gel;
mixing cement and geopolymer gel, adding water and stirring to obtain a gelled material slurry;
adding a foaming agent into water for dilution and foaming to prepare foam, and adding a foam stabilizer;
and mixing the foam and the gelled material slurry, uniformly stirring to obtain foam concrete slurry, and then pouring and maintaining to obtain the geopolymer-based foam concrete.
9. The method for producing a geopolymer-based foamed concrete for roads according to claim 8,the foaming agent is characterized in that the foaming agent is diluted by 20-22 times, and the density of the prepared foam is 45-60 Kg/m3。
10. The method for preparing geopolymer-based foam concrete for roads according to claim 8, wherein the water-to-gel ratio in the preparation process is 1: 2-2: 3.
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Cited By (3)
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| CN114477891A (en) * | 2021-12-27 | 2022-05-13 | 山东坊能新动能科学研究院有限公司 | Cement-water-glass quick-setting foam concrete and preparation method thereof |
| CN114477945A (en) * | 2021-12-27 | 2022-05-13 | 山东坊能新动能科学研究院有限公司 | Alkali-activated reinforced cement water glass rapid-setting foam concrete and preparation method thereof |
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