CN114014687B - Aerated concrete block prepared from gasified ash and slag and preparation method thereof - Google Patents
Aerated concrete block prepared from gasified ash and slag and preparation method thereof Download PDFInfo
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- CN114014687B CN114014687B CN202111333133.7A CN202111333133A CN114014687B CN 114014687 B CN114014687 B CN 114014687B CN 202111333133 A CN202111333133 A CN 202111333133A CN 114014687 B CN114014687 B CN 114014687B
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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
-
- 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
-
- 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
-
- 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 belongs to an aerated concrete block prepared by using gasified ash and a preparation method thereof; the feed is prepared from the following raw materials in parts by weight: 40 to 50 portions of gasified ash, 20 to 25 portions of silicon dioxide, 17 to 23 portions of calcium oxide, 8 to 12 portions of cement, 2.5 to 4.5 portions of gypsum, 0.75 to 1.75 portions of aluminum powder and 55 to 65 portions of water; the gasification ash is ash obtained after a gasification furnace of a chemical enterprise prepares a feed gas; the method has the characteristics of being capable of preparing the aerated concrete building blocks by using the gasified ash residues and solid wastes, realizing the purpose of changing waste into valuable, improving the enterprise competitiveness, being low in cost, simple and controllable in operation, high in building block strength and meeting the requirements of national standard B05-level qualified products and utilizing the gasified ash residues for preparation.
Description
Technical Field
The invention belongs to the technical field of buildings, and particularly relates to an aerated concrete block prepared from gasified ash and a preparation method thereof.
Background
The existing aerated concrete block is mainly produced by adopting boiler coal ash, such as gasified slag generated by boiler combustion in the power generation process of a power plant, the gasified slag is residue generated after the boiler fully combusts coal, and has the characteristics of uniform particle size, low ignition loss and low sulfur content; however, according to statistics, the quantity of chemical waste slag-gasified ash slag is gradually increased in recent years, and the gasified slag of chemical enterprises accounts for 81 percent of the total slag quantity. Along with the increase of the amount of the gasified slag, the application of the gasified slag in various fields is researched and explored, such as re-sintering and consolidation, which brings secondary high energy consumption and low feasibility of high pollution; the main reason is that raw material coal in a gasification furnace in the chemical industry mainly adopts chemical reaction to generate raw material gas, the combustion is insufficient, so the ignition loss and the sulfur content exceed the standard, the problems of unstable pouring, serious shrinkage, air hole penetration, poor product strength and poor freezing resistance are easily caused by taking the ignition loss as an example, the problem of poor viscosity and difficult forming exists when building blocks are produced by taking the sulfur content as an example, and the problem of easy cracking exists when the building blocks are used. The problem causes that the gasified ash slag generated by the gasification furnace in the chemical industry is different from the slag generated by the combustion of the boiler, and the gasified ash slag can not be effectively applied in the field of building blocks all the time, so that the problem of pollution is caused, and the cost for piling the solid waste in the land purchased by an enterprise is also increased.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the aerated concrete block prepared by utilizing the gasified ash slag and the preparation method thereof, wherein the aerated concrete block can be prepared by utilizing the gasified ash slag solid waste, the waste is changed into valuable, the enterprise competitiveness is improved, the cost is low, the operation is simple and controllable, the block strength is high, and the aerated concrete block meets the requirements of national standard B05-level qualified products.
The purpose of the invention is realized as follows:
an aerated concrete block prepared from gasified ash comprises the following raw materials in parts by weight: 40 to 50 portions of gasified ash, 20 to 25 portions of silicon dioxide, 17 to 23 portions of calcium oxide, 8 to 12 portions of cement, 2.5 to 4.5 portions of gypsum, 0.75 to 1.75 portions of aluminum powder and 55 to 65 portions of water; the gasification ash is the ash obtained after raw material gas is prepared by a gasification furnace of a chemical enterprise.
Preferably, the aerated concrete block is prepared from the following raw materials in parts by weight: 44 to 50 portions of gasified clinker, 20 to 24 portions of silicon dioxide, 18 to 23 portions of calcium oxide, 9 to 12 portions of cement, 3 to 4.5 portions of gypsum, 0.75 to 1 portion of aluminum powder and 58 to 65 portions of water.
Preferably, the aerated concrete block is prepared from the following raw materials in parts by weight: 46 to 50 portions of gasified clinker, 20 to 22 portions of silicon dioxide, 18 to 21 portions of calcium oxide, 10 to 12 portions of cement, 3 to 4 portions of gypsum, 0.8 to 0.9 portion of aluminum powder and 58.7 to 66 portions of water.
Preferably, the aerated concrete block is prepared from the following raw materials in parts by weight: 47 parts of gasified ash, 20 parts of silicon dioxide, 19 parts of calcium oxide, 11 parts of cement, 3 parts of gypsum, 0.85 part of aluminum powder and 60.5 parts of water.
Preferably, the aerated concrete block is prepared from the following raw materials in parts by weight: 49 parts of gasified ash, 21 parts of silicon dioxide, 20 parts of calcium oxide, 10 parts of cement, 3.5 parts of gypsum, 0.9 part of aluminum powder and 62.6 parts of water.
The invention also provides a preparation method of the aerated concrete block prepared by utilizing the gasified ash, which comprises the following steps:
step 1: crushing and grinding the gasified ash until the gasified ash is 60-70 microns;
step 2: crushing and grinding the silicon dioxide until the silicon dioxide is 60-70 micrometers;
and 3, step 3: uniformly mixing the gasified ash and the silicon dioxide which are ground in the step 1 and the step 2;
and 4, step 4: adding calcium oxide into the gasified ash and silicon dioxide which are uniformly mixed in the step 3, and uniformly stirring to prepare a semi-finished product mixture;
and 5: adding cement into the semi-finished product mixture in the step 4, and uniformly stirring;
and 6: adding gypsum into the semi-finished product mixture added with the cement in the step 5, and uniformly stirring;
and 7: adding water into the semi-finished product mixture added with the gypsum in the step 6, and stirring for 3-4 min;
and 8: adding aluminum powder into the mixture after the stirring is finished, wherein the aluminum powder is quickly added in the stirring process, and then the mixture added with the aluminum powder is poured into a mould for standing foaming and curing silicon-calcium reaction initial setting; the time for adding the aluminum powder while stirring is as follows: 30-40 s;
and step 9: and (3) enabling the mixture in the step (8) to form a silicon-calcium reaction, wherein the temperature of the silicon-calcium reaction is 40-50 ℃, and the reaction time is as follows: 3.5-5 h, and then preparing a blank building block;
step 10: cutting and forming the blank building block, and placing the blank building block into an autoclave for autoclave reaction forming to obtain a finished product for sale; the temperature in the autoclave is 185-200 ℃ during the autoclave reaction, the temperature is kept for 6-8 h under the constant temperature state, and the pressure is 1.2Mpa.
According to the aerated concrete block prepared by utilizing the gasified ash and the preparation method thereof, as the gasified ash has the defects of non-uniform granularity and over-standard ignition loss and sulfur content, the traditional solution is to reburn, desulfurize and screen the gasified ash, and grind the gasified ash with overlarge granularity; the technical process is relatively complicated and high in cost, the gasified ash and the silicon dioxide are uniformly ground into similar particle sizes and mixed on the basis, the technical process not only solves the problem of uneven particle sizes of the gasified ash, but also can integrally reduce the content of sulfur in a finished product by adding and uniformly mixing the silicon dioxide, and strengthen the silico-calcium reaction in the later silico-calcium reaction, so that the defect that the strength of the finished product is not high due to high ignition loss of the gasified ash is overcome; the invention takes the mixture of gasified ash and silicon dioxide as the main material, the addition amount of the silicon dioxide is about half of the total weight of the gasified ash, the sulfur content is effectively reduced, and the problems of poor strength and the like caused by serious contraction and air hole penetration of the gasified ash in the preparation process are solved; the invention adds the dry material of calcium oxide on the basis of the main material, and after the main material is uniformly mixed, the purposes of generating a calcium silicon reaction and adjusting the calcium silicon reaction speed are realized by adding cement and water; the method has the characteristics of capability of preparing the aerated concrete building block from the gasified ash solid wastes, realization of changing waste into valuable, improvement of enterprise competitiveness, low cost, simple and controllable operation, high building block strength and capability of meeting the requirements of national standard B05-level qualified products by utilizing the gasified ash.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, specific embodiments of the present invention will now be described.
The invention relates to an aerated concrete block prepared from gasified ash and a preparation method thereof, wherein the aerated concrete block is prepared from the following raw materials in parts by weight: 40 to 50 portions of gasified ash, 20 to 25 portions of silicon dioxide, 17 to 23 portions of calcium oxide, 8 to 12 portions of cement, 2.5 to 4.5 portions of gypsum, 0.75 to 1.75 portions of aluminum powder and 55 to 65 portions of water; the gasification ash is the ash obtained after raw material gas is prepared by a gasification furnace of a chemical enterprise.
An aerated concrete block prepared from gasified ash residues comprises the following raw materials in parts by weight: 44 to 50 portions of gasified clinker, 20 to 24 portions of silicon dioxide, 18 to 23 portions of calcium oxide, 9 to 12 portions of cement, 3 to 4.5 portions of gypsum, 0.75 to 1 portion of aluminum powder and 58 to 65 portions of water.
An aerated concrete block prepared from gasified ash comprises the following raw materials in parts by weight: 46 to 50 portions of gasified clinker, 20 to 22 portions of silicon dioxide, 18 to 21 portions of calcium oxide, 10 to 12 portions of cement, 3 to 4 portions of gypsum, 0.8 to 0.9 portion of aluminum powder and 58.7 to 66 portions of water.
An aerated concrete block prepared from gasified ash residues comprises the following raw materials in parts by weight: 47 parts of gasified ash, 20 parts of silicon dioxide, 19 parts of calcium oxide, 11 parts of cement, 3 parts of gypsum, 0.85 part of aluminum powder and 60.5 parts of water.
An aerated concrete block prepared from gasified ash comprises the following raw materials in parts by weight: 49 parts of gasified ash, 21 parts of silicon dioxide, 20 parts of calcium oxide, 10 parts of cement, 3.5 parts of gypsum, 0.9 part of aluminum powder and 62.6 parts of water.
The invention also provides a preparation method of the aerated concrete block prepared by utilizing the gasified ash, which comprises the following steps:
step 1: crushing and grinding the gasified ash until the gasified ash is 60-70 microns;
step 2: crushing and grinding the silicon dioxide until the silicon dioxide is 60-70 micrometers;
and step 3: uniformly mixing the gasified ash and silicon dioxide ground in the steps 1 and 2;
and 4, step 4: adding calcium oxide into the gasified ash and the silicon dioxide which are uniformly mixed in the step 3, and uniformly stirring to prepare a semi-finished product mixture;
and 5: adding cement into the semi-finished product mixture in the step 4, and uniformly stirring;
step 6: adding gypsum into the semi-finished product mixture added with the cement in the step 5, and uniformly stirring;
and 7: adding water into the semi-finished product mixture added with the gypsum in the step 6, and stirring for 3-4 min;
and 8: adding aluminum powder into the mixture after the stirring is finished, wherein the aluminum powder is quickly added in the stirring process, and then the mixture added with the aluminum powder is poured into a mould for standing foaming and curing silicon-calcium reaction initial setting; the time for adding the aluminum powder while stirring is as follows: 30-40 s;
and step 9: and (3) enabling the mixture in the step (8) to form a silicon-calcium reaction, wherein the temperature of the silicon-calcium reaction is 40-50 ℃, and the reaction time is as follows: 3.5-5 h, and then preparing a blank building block;
step 10: cutting and forming the blank building block, and putting the blank building block into a still kettle for carrying out the still reaction forming, thus obtaining a finished product for sale; the temperature in the autoclave during the autoclave reaction is 185-200 ℃, the temperature is kept for 6-8 h under the constant temperature state, and the pressure is 1.2Mpa.
The present invention will now be further illustrated with reference to examples in order to explain the present invention in more detail. The specific embodiment is as follows:
example 1
An aerated concrete block prepared from gasified ash comprises the following raw materials in parts by weight: 50 parts of gasified ash, 25 parts of silicon dioxide, 23 parts of calcium oxide, 12 parts of cement, 4.5 parts of gypsum, 1.75 parts of aluminum powder and 65 parts of water; the gasification ash is the ash obtained after raw material gas is prepared by a gasification furnace of a chemical enterprise.
A preparation method of an aerated concrete block prepared by utilizing gasified ash comprises the following steps:
step 1: crushing and grinding the gasified ash until the gasified ash is 60 microns;
step 2: crushing and grinding the silicon dioxide until the silicon dioxide is 60 micrometers;
and step 3: uniformly mixing the gasified ash and silicon dioxide ground in the steps 1 and 2;
and 4, step 4: adding calcium oxide into the gasified ash and the silicon dioxide which are uniformly mixed in the step 3, and uniformly stirring to prepare a semi-finished product mixture;
and 5: adding cement into the semi-finished product mixture in the step 4, and uniformly stirring;
step 6: adding gypsum into the semi-finished product mixture added with the cement in the step 5, and uniformly stirring;
and 7: adding water into the semi-finished product mixture added with the gypsum in the step 6, and stirring for 3min;
and 8: adding aluminum powder into the mixture after the stirring is finished, wherein the aluminum powder is quickly added in the stirring process, and then pouring the mixture added with the aluminum powder into a mold for standing, foaming and curing, and carrying out a silico-calcium reaction for initial setting; the time for adding the aluminum powder while stirring is as follows: 30s;
and step 9: and (3) enabling the mixture in the step (8) to form a calcium silicon reaction, wherein the temperature of the calcium silicon reaction is 50 ℃, and the reaction time is as follows: 5h, preparing a blank building block;
step 10: cutting and forming the blank building block, and placing the blank building block into an autoclave for autoclave reaction forming to obtain a finished product for sale; the temperature in the autoclave is 200 ℃ during the autoclave reaction, the temperature is kept for 8 hours under the constant temperature state, and the pressure is 1.2Mpa.
Example 2
An aerated concrete block prepared from gasified ash residues comprises the following raw materials in parts by weight: 40 parts of gasified ash, 20 parts of silicon dioxide, 17 parts of calcium oxide, 8 parts of cement, 2.5 parts of gypsum, 0.75 part of aluminum powder and 55 parts of water; the gasified ash is ash obtained after a gasification furnace of a chemical industry enterprise prepares feed gas.
A preparation method of an aerated concrete block prepared from gasified ash comprises the following steps:
step 1: crushing and grinding the gasified ash until the gasified ash is 70 microns;
step 2: crushing and grinding the silicon dioxide until the silicon dioxide is 70 micrometers;
and step 3: uniformly mixing the gasified ash and silicon dioxide ground in the steps 1 and 2;
and 4, step 4: adding calcium oxide into the gasified ash and silicon dioxide which are uniformly mixed in the step 3, and uniformly stirring to prepare a semi-finished product mixture;
and 5: adding cement into the semi-finished product mixture in the step 4, and uniformly stirring;
step 6: adding gypsum into the semi-finished product mixture added with the cement in the step 5, and uniformly stirring;
and 7: adding water into the semi-finished product mixture added with the gypsum in the step 6, and stirring for 4min;
and step 8: adding aluminum powder into the mixture after the stirring is finished, wherein the aluminum powder is quickly added in the stirring process, and then pouring the mixture added with the aluminum powder into a mold for standing, foaming and curing, and carrying out a silico-calcium reaction for initial setting; the time for adding the aluminum powder while stirring is as follows: 40s;
and step 9: and (3) enabling the mixture in the step (8) to form a calcium silicon reaction, wherein the temperature of the calcium silicon reaction is 40 ℃, and the reaction time is as follows: 3.5h, then preparing a blank building block;
step 10: cutting and forming the blank building block, and placing the blank building block into an autoclave for autoclave reaction forming to obtain a finished product for sale; the temperature in the autoclave during the autoclave reaction is 185 ℃, the temperature is kept for 6 hours under the constant temperature state, and the pressure is 1.2Mpa.
Example 3
An aerated concrete block prepared from gasified ash comprises the following raw materials in parts by weight: 45 parts of gasified ash, 22.5 parts of silicon dioxide, 20 parts of calcium oxide, 10 parts of cement, 3.5 parts of gypsum, 1.25 parts of aluminum powder and 60 parts of water; the gasified ash is ash obtained after a gasification furnace of a chemical industry enterprise prepares feed gas.
A preparation method of an aerated concrete block prepared from gasified ash comprises the following steps:
step 1: crushing and grinding the gasified ash until the gasified ash is 65 microns;
and 2, step: crushing and grinding the silicon dioxide until the silicon dioxide is 65 micrometers;
and step 3: uniformly mixing the gasified ash and silicon dioxide ground in the steps 1 and 2;
and 4, step 4: adding calcium oxide into the gasified ash and the silicon dioxide which are uniformly mixed in the step 3, and uniformly stirring to prepare a semi-finished product mixture;
and 5: adding cement into the semi-finished product mixture in the step 4, and uniformly stirring;
and 6: adding gypsum into the semi-finished product mixture added with the cement in the step 5, and uniformly stirring;
and 7: adding water into the semi-finished product mixture added with the gypsum in the step 6, and stirring for 3.5min;
and 8: adding aluminum powder into the mixture after the stirring is finished, wherein the aluminum powder is quickly added in the stirring process, and then pouring the mixture added with the aluminum powder into a mold for standing, foaming and curing, and carrying out a silico-calcium reaction for initial setting; the time for adding the aluminum powder while stirring is as follows: 35s;
and step 9: and (3) enabling the mixture in the step (8) to form a calcium silicon reaction, wherein the temperature of the calcium silicon reaction is 45 ℃, and the reaction time is as follows: 4.5h, then making a blank building block;
step 10: cutting and forming the blank building block, and placing the blank building block into an autoclave for autoclave reaction forming to obtain a finished product for sale; the temperature in the autoclave during the autoclave reaction is 192 ℃, the temperature is kept for 7 hours under the constant temperature state, and the pressure is 1.2Mpa.
Example 4
An aerated concrete block prepared from gasified ash residues comprises the following raw materials in parts by weight: 44 parts of gasified ash, 24 parts of silicon dioxide, 18 parts of calcium oxide, 9 parts of cement, 3 parts of gypsum, 0.75 part of aluminum powder and 58 parts of water.
A preparation method of an aerated concrete block prepared by utilizing gasified ash comprises the following steps:
step 1: crushing and grinding the gasified ash until the gasified ash is 68 microns;
step 2: crushing and grinding the silicon dioxide until the silicon dioxide is 68 microns;
and 3, step 3: uniformly mixing the gasified ash and the silicon dioxide which are ground in the step 1 and the step 2;
and 4, step 4: adding calcium oxide into the gasified ash and silicon dioxide which are uniformly mixed in the step 3, and uniformly stirring to prepare a semi-finished product mixture;
and 5: adding cement into the semi-finished product mixture in the step 4, and uniformly stirring;
step 6: adding gypsum into the semi-finished product mixture added with the cement in the step 5, and uniformly stirring;
and 7: adding water into the semi-finished product mixture added with the gypsum in the step 6, and stirring for 3.2min;
and 8: adding aluminum powder into the mixture after the stirring is finished, wherein the aluminum powder is quickly added in the stirring process, and then the mixture added with the aluminum powder is poured into a mould for standing foaming and curing silicon-calcium reaction initial setting; the time for adding the aluminum powder while stirring is as follows: 32s;
and step 9: and (3) enabling the mixture in the step (8) to form a silicon-calcium reaction, wherein the temperature of the silicon-calcium reaction is 46 ℃, and the reaction time is as follows: 3.8h, then preparing a blank building block;
step 10: cutting and forming the blank building block, and placing the blank building block into an autoclave for autoclave reaction forming to obtain a finished product for sale; the temperature in the autoclave during the autoclave reaction is 193 ℃, the temperature is kept for 6.5 hours under the constant temperature state, and the pressure is 1.2Mpa.
Example 5
An aerated concrete block prepared from gasified ash residues comprises the following raw materials in parts by weight: 50 parts of gasified ash, 20 parts of silicon dioxide, 23 parts of calcium oxide, 12 parts of cement, 4.5 parts of gypsum, 1 part of aluminum powder and 65 parts of water.
A preparation method of an aerated concrete block prepared by utilizing gasified ash comprises the following steps:
step 1: crushing and grinding the gasified ash until the gasified ash is 66 microns;
step 2: crushing and grinding the silicon dioxide until the silicon dioxide is 66 microns;
and step 3: uniformly mixing the gasified ash and the silicon dioxide which are ground in the step 1 and the step 2;
and 4, step 4: adding calcium oxide into the gasified ash and the silicon dioxide which are uniformly mixed in the step 3, and uniformly stirring to prepare a semi-finished product mixture;
and 5: adding cement into the semi-finished product mixture in the step 4, and uniformly stirring;
and 6: adding gypsum into the semi-finished product mixture added with the cement in the step 5, and uniformly stirring;
and 7: adding water into the semi-finished product mixture added with the gypsum in the step 6, and stirring for 3.8min;
and 8: adding aluminum powder into the mixture after the stirring is finished, wherein the aluminum powder is quickly added in the stirring process, and then pouring the mixture added with the aluminum powder into a mold for standing, foaming and curing, and carrying out a silico-calcium reaction for initial setting; the time for adding the aluminum powder while stirring is as follows: 38s;
and step 9: and (3) enabling the mixture in the step (8) to form a calcium-silicon reaction, wherein the temperature of the calcium-silicon reaction is 43 ℃, and the reaction time is as follows: 4.7h, then preparing a blank building block;
step 10: cutting and forming the blank building block, and placing the blank building block into an autoclave for autoclave reaction forming to obtain a finished product for sale; the temperature in the autoclave during the autoclave reaction is 185 ℃, the temperature is kept for 6.7 hours under the constant temperature state, and the pressure is 1.2Mpa.
Example 6
An aerated concrete block prepared from gasified ash comprises the following raw materials in parts by weight: 47 parts of gasified ash, 22 parts of silicon dioxide, 20.5 parts of calcium oxide, 10.5 parts of cement, 3.8 parts of gypsum, 0.88 part of aluminum powder and 61 parts of water.
A preparation method of an aerated concrete block prepared by utilizing gasified ash comprises the following steps:
step 1: crushing and grinding the gasified ash until the gasified ash is 64 microns;
and 2, step: crushing and grinding the silicon dioxide until the silicon dioxide is 64 microns;
and step 3: uniformly mixing the gasified ash and the silicon dioxide which are ground in the step 1 and the step 2;
and 4, step 4: adding calcium oxide into the gasified ash and silicon dioxide which are uniformly mixed in the step 3, and uniformly stirring to prepare a semi-finished product mixture;
and 5: adding cement into the semi-finished product mixture in the step 4, and uniformly stirring;
step 6: adding gypsum into the semi-finished product mixture added with the cement in the step 5, and uniformly stirring;
and 7: adding water into the semi-finished product mixture added with the gypsum in the step 6, and stirring for 3.6min;
and 8: adding aluminum powder into the mixture after the stirring is finished, wherein the aluminum powder is quickly added in the stirring process, and then pouring the mixture added with the aluminum powder into a mold for standing, foaming and curing, and carrying out a silico-calcium reaction for initial setting; the time for adding the aluminum powder while stirring is as follows: 36s;
and step 9: and (3) enabling the mixture in the step (8) to form a silicon-calcium reaction, wherein the temperature of the silicon-calcium reaction is 45 ℃, and the reaction time is as follows: 4.5h, then preparing a blank building block;
step 10: cutting and forming the blank building block, and placing the blank building block into an autoclave for autoclave reaction forming to obtain a finished product for sale; the temperature in the autoclave during the autoclave reaction is 190 ℃, the temperature is kept for 7.5 hours under the constant temperature state, and the pressure is 1.2Mpa.
Example 7
An aerated concrete block prepared from gasified ash comprises the following raw materials in parts by weight: 46 parts of gasified ash, 20 parts of silicon dioxide, 18 parts of calcium oxide, 10 parts of cement, 3 parts of gypsum, 0.8 part of aluminum powder and 58.7 parts of water.
A preparation method of an aerated concrete block prepared by utilizing gasified ash comprises the following steps:
step 1: crushing and grinding the gasified ash until the gasified ash is 60 microns;
step 2: crushing and grinding the silicon dioxide until the silicon dioxide is 60 microns;
and 3, step 3: uniformly mixing the gasified ash and silicon dioxide ground in the steps 1 and 2;
and 4, step 4: adding calcium oxide into the gasified ash and silicon dioxide which are uniformly mixed in the step 3, and uniformly stirring to prepare a semi-finished product mixture;
and 5: adding cement into the semi-finished product mixture in the step 4, and uniformly stirring;
step 6: adding gypsum into the semi-finished product mixture added with the cement in the step 5, and uniformly stirring;
and 7: adding water into the semi-finished product mixture added with the gypsum in the step 6, and stirring for 3.3min;
and 8: adding aluminum powder into the mixture after the stirring is finished, wherein the aluminum powder is quickly added in the stirring process, and then the mixture added with the aluminum powder is poured into a mould for standing foaming and curing silicon-calcium reaction initial setting; the time for adding the aluminum powder while stirring is as follows: 40s;
and step 9: and (3) enabling the mixture in the step (8) to form a calcium silicon reaction, wherein the temperature of the calcium silicon reaction is 50 ℃, and the reaction time is as follows: 5h, preparing a blank building block;
step 10: cutting and forming the blank building block, and putting the blank building block into a still kettle for carrying out the still reaction forming, thus obtaining a finished product for sale; the temperature in the autoclave during the autoclave reaction is 200 ℃, the temperature is kept for 6 hours under the constant temperature state, and the pressure is 1.2Mpa.
Example 8
An aerated concrete block prepared from gasified ash comprises the following raw materials in parts by weight: 50 parts of gasified ash, 22 parts of silicon dioxide, 21 parts of calcium oxide, 12 parts of cement, 4 parts of gypsum, 0.9 part of aluminum powder and 66 parts of water.
A preparation method of an aerated concrete block prepared by utilizing gasified ash comprises the following steps:
step 1: crushing and grinding the gasified ash until the gasified ash is 70 microns;
and 2, step: crushing and grinding the silicon dioxide until the silicon dioxide is 70 microns;
and step 3: uniformly mixing the gasified ash and silicon dioxide ground in the steps 1 and 2;
and 4, step 4: adding calcium oxide into the gasified ash and the silicon dioxide which are uniformly mixed in the step 3, and uniformly stirring to prepare a semi-finished product mixture;
and 5: adding cement into the semi-finished product mixture in the step 4, and uniformly stirring;
step 6: adding gypsum into the semi-finished product mixture added with the cement in the step 5, and uniformly stirring;
and 7: adding water into the semi-finished product mixture added with the gypsum in the step 6, and stirring for 4min;
and 8: adding aluminum powder into the mixture after the stirring is finished, wherein the aluminum powder is quickly added in the stirring process, and then the mixture added with the aluminum powder is poured into a mould for standing foaming and curing silicon-calcium reaction initial setting; the time for adding the aluminum powder while stirring is as follows: 30s;
and step 9: and (3) enabling the mixture in the step (8) to form a silicon-calcium reaction, wherein the temperature of the silicon-calcium reaction is 40 ℃, and the reaction time is as follows: 3.5h, then preparing a blank building block;
step 10: cutting and forming the blank building block, and placing the blank building block into an autoclave for autoclave reaction forming to obtain a finished product for sale; the temperature in the autoclave is 185 ℃ during the autoclave reaction, the temperature is kept for 8 hours under the constant temperature state, and the pressure is 1.2Mpa.
Example 9
An aerated concrete block prepared from gasified ash comprises the following raw materials in parts by weight: 48 parts of gasified ash, 21 parts of silicon dioxide, 19.5 parts of calcium oxide, 11 parts of cement, 3.5 parts of gypsum, 0.85 part of aluminum powder and 62.35 parts of water.
A preparation method of an aerated concrete block prepared by utilizing gasified ash comprises the following steps:
step 1: crushing and grinding the gasified ash until the gasified ash is 64 microns;
and 2, step: crushing and grinding the silicon dioxide until the silicon dioxide is 64 microns;
and step 3: uniformly mixing the gasified ash and silicon dioxide ground in the steps 1 and 2;
and 4, step 4: adding calcium oxide into the gasified ash and silicon dioxide which are uniformly mixed in the step 3, and uniformly stirring to prepare a semi-finished product mixture;
and 5: adding cement into the semi-finished product mixture in the step 4, and uniformly stirring;
step 6: adding gypsum into the semi-finished product mixture added with the cement in the step 5, and uniformly stirring;
and 7: adding water into the semi-finished product mixture added with the gypsum in the step 6, and stirring for 3min;
and 8: adding aluminum powder into the mixture after the stirring is finished, wherein the aluminum powder is quickly added in the stirring process, and then the mixture added with the aluminum powder is poured into a mould for standing foaming and curing silicon-calcium reaction initial setting; the time for adding the aluminum powder while stirring is as follows: 34s;
and step 9: and (3) enabling the mixture in the step (8) to form a silicon-calcium reaction, wherein the temperature of the silicon-calcium reaction is 46 ℃, and the reaction time is as follows: 4.1h, then preparing a blank building block;
step 10: cutting and forming the blank building block, and placing the blank building block into an autoclave for autoclave reaction forming to obtain a finished product for sale; the temperature in the autoclave is 193 ℃ during the autoclave reaction, the temperature is kept for 7 hours under the constant temperature state, and the pressure is 1.2Mpa.
Example 10
An aerated concrete block prepared from gasified ash comprises the following raw materials in parts by weight: 47 parts of gasified ash, 20 parts of silicon dioxide, 19 parts of calcium oxide, 11 parts of cement, 3 parts of gypsum, 0.85 part of aluminum powder and 60.5 parts of water.
A preparation method of an aerated concrete block prepared from gasified ash comprises the following steps:
step 1: crushing and grinding the gasified ash until the gasified ash is 70 microns;
step 2: crushing and grinding the silicon dioxide until the silicon dioxide is 70 micrometers;
and 3, step 3: uniformly mixing the gasified ash and the silicon dioxide which are ground in the step 1 and the step 2;
and 4, step 4: adding calcium oxide into the gasified ash and the silicon dioxide which are uniformly mixed in the step 3, and uniformly stirring to prepare a semi-finished product mixture;
and 5: adding cement into the semi-finished product mixture in the step 4, and uniformly stirring;
step 6: adding gypsum into the semi-finished product mixture added with the cement in the step 5, and uniformly stirring;
and 7: adding water into the semi-finished product mixture added with the gypsum in the step 6, and stirring for 3.6min;
and step 8: adding aluminum powder into the mixture after the stirring is finished, wherein the aluminum powder is quickly added in the stirring process, and then pouring the mixture added with the aluminum powder into a mold for standing, foaming and curing, and carrying out a silico-calcium reaction for initial setting; the time for adding the aluminum powder while stirring is as follows: 35s;
and step 9: and (3) enabling the mixture in the step (8) to form a calcium-silicon reaction, wherein the temperature of the calcium-silicon reaction is 43 ℃, and the reaction time is as follows: 4h, preparing a blank building block;
step 10: cutting and forming the blank building block, and placing the blank building block into an autoclave for autoclave reaction forming to obtain a finished product for sale; the temperature in the autoclave during the autoclave reaction is 193 ℃, the temperature is kept for 7 hours under the constant temperature state, and the pressure is 1.2Mpa.
Example 11
An aerated concrete block prepared from gasified ash comprises the following raw materials in parts by weight: 49 parts of gasified ash, 21 parts of silicon dioxide, 20 parts of calcium oxide, 10 parts of cement, 3.5 parts of gypsum, 0.9 part of aluminum powder and 62.6 parts of water.
A preparation method of an aerated concrete block prepared from gasified ash comprises the following steps:
step 1: crushing and grinding the gasified ash until the gasified ash is 60-70 microns;
step 2: crushing and grinding the silicon dioxide until the silicon dioxide is 60-70 micrometers;
and step 3: uniformly mixing the gasified ash and silicon dioxide ground in the steps 1 and 2;
and 4, step 4: adding calcium oxide into the gasified ash and silicon dioxide which are uniformly mixed in the step 3, and uniformly stirring to prepare a semi-finished product mixture;
and 5: adding cement into the semi-finished product mixture in the step 4, and uniformly stirring;
step 6: adding gypsum into the semi-finished product mixture added with the cement in the step 5, and uniformly stirring;
and 7: adding water into the semi-finished product mixture added with the gypsum in the step 6, and stirring for 3.5min;
and 8: adding aluminum powder into the mixture after the stirring is finished, wherein the aluminum powder is quickly added in the stirring process, and then the mixture added with the aluminum powder is poured into a mould for standing foaming and curing silicon-calcium reaction initial setting; the time for adding the aluminum powder while stirring is as follows: 37s;
and step 9: and (3) enabling the mixture in the step (8) to form a calcium silicon reaction, wherein the temperature of the calcium silicon reaction is 47 ℃, and the reaction time is as follows: 4.5h, then preparing a blank building block;
step 10: cutting and forming the blank building block, and placing the blank building block into an autoclave for autoclave reaction forming to obtain a finished product for sale; the temperature in the autoclave during the autoclave reaction is 195 ℃, the temperature is kept for 7.5 hours under the constant temperature state, and the pressure is 1.2Mpa.
Comparative example
The components of example 10 above, the preparation method and the product produced were randomly selected as examples:
sample brick 1: the silicon dioxide and the corresponding weight fraction in the embodiment 10 are saved, the steps 1, 2 and 3 are saved, and the gasified ash slag is directly mixed with the calcium oxide in the step 4 to prepare the sample brick 1;
and (3) sample brick 2: reducing the weight fraction of the silicon dioxide in the example 10 to 10 parts, and preparing the sample brick 2 by the same preparation method as the example 7;
and (3) sample brick 3: same as the composition of example 10, but grinding the gasified ash in step 1 and the silica in step 2 to 80 microns separately, same as the preparation method, produced a briquette 3.
And (4) sample brick: the coupons prepared in example 10 of the present invention.
The name of the experiment: quantitative intensity test
And (3) accurately measuring the oven dry compressive strength value of the autoclaved aerated concrete block by using a pressure testing machine, and testing the strength by randomly extracting a sample in order to ensure that the test result is more accurate.
The main equipment used is: an electrothermal blowing drying box (the maximum using temperature is 200 ℃); 150mm steel die; a compression tester (TYE-300), with a maximum load of 300KN; a still kettle; an electronic balance (5000 g, precision 1 g); a steel ruler.
The test method comprises the following steps:
(1) 1 sample of each sample brick is dried to constant weight by adopting an electric heating air blast drying oven;
(2) Accurately measuring the bad quality of the dried brick by adopting an electronic balance (5000 g, the precision is 1 g);
(3) Accurately measuring the appearance size of the autoclaved aerated concrete block by adopting a steel ruler;
(4) And measuring the compressive strength value of the autoclaved aerated concrete block by using a pressure tester (TYE-300).
And (3) testing results:
| sample(s) | Dry density (kg/m) 3 ) | Absolute dry compression strength (Mpa) |
| Sample brick | 493 | 1.6 |
| Sample brick | 490 | 1.9 |
| Sample brick | 500 | 2.1 |
| Sample brick | 477 | 3.0 |
Attached: the compressive strength value here is the oven dry compressive strength; the compressive strength, as measured by the method in the standard (GB/T11969-2008), is approximately equal to 75% of the oven dry compressive strength.
According to the test results, the oven dry compressive strength of the sample brick 4 manufactured in the embodiment 10 of the invention meets the requirements of national standard B05-grade qualified products; further, according to the comparative example, the raw materials, the weight fractions of the raw materials and the preparation method in the invention have a crucial effect on the compressive strength, and the ash and the silica after the raw material gas is prepared by using a gasification furnace of a chemical enterprise as a base material, and the aerated concrete block meeting the national standard requirements can be prepared by adding calcium oxide, cement, gypsum, aluminum powder and the like on the basis.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "connected", and the like are to be construed broadly, and may be, for example, fixedly connected, integrally connected, or detachably connected; or communication between the interior of the two elements; the terms may be directly connected or indirectly connected through an intermediate, and a person of ordinary skill in the art can understand the specific meaning of the terms in the present invention according to specific situations. The above examples are merely illustrative of the feasible embodiments of the present invention and they are not intended to limit the scope of the present invention, and equivalent embodiments, modifications and alterations without departing from the technical spirit of the present invention are included in the scope of the present invention.
Claims (6)
1. The aerated concrete block prepared by utilizing gasified ash is characterized in that: the aerated concrete block is prepared from the following raw materials in parts by weight: 40 to 50 portions of gasified ash, 20 to 25 portions of silicon dioxide, 17 to 23 portions of calcium oxide, 8 to 12 portions of cement, 2.5 to 4.5 portions of gypsum, 0.75 to 1.75 portions of aluminum powder and 55 to 65 portions of water; the gasified ash is ash obtained after a gasification furnace of a chemical industry enterprise prepares feed gas; the preparation method of the aerated concrete block comprises the following steps:
step 1: crushing and grinding the gasified ash until the gasified ash is 60-70 microns;
and 2, step: crushing and grinding the silicon dioxide until the silicon dioxide is 60-70 microns;
and 3, step 3: and (3) uniformly mixing the gasified ash and the silicon dioxide ground in the step (1) and the step (2).
2. The aerated concrete block prepared by using gasified ash according to claim 1, wherein: the aerated concrete block is prepared from the following raw materials in parts by weight: 44-50 parts of gasified ash, 20-24 parts of silicon dioxide, 18-23 parts of calcium oxide, 9-12 parts of cement, 3-4.5 parts of gypsum, 0.75-1 part of aluminum powder and 58-65 parts of water.
3. The aerated concrete block prepared by using gasified ash according to claim 1, wherein: the aerated concrete block is prepared from the following raw materials in parts by weight: 46 to 50 portions of gasified clinker, 20 to 22 portions of silicon dioxide, 18 to 21 portions of calcium oxide, 10 to 12 portions of cement, 3 to 4 portions of gypsum, 0.8 to 0.9 portion of aluminum powder and 58.7 to 66 portions of water.
4. The aerated concrete block prepared by using gasified ash according to claim 1, wherein: the aerated concrete block is prepared from the following raw materials in parts by weight: 47 parts of gasified ash, 20 parts of silicon dioxide, 19 parts of calcium oxide, 11 parts of cement, 3 parts of gypsum, 0.85 part of aluminum powder and 60.5 parts of water.
5. The aerated concrete block prepared by using gasified ash according to claim 1, wherein: the aerated concrete block is prepared from the following raw materials in parts by weight: 49 parts of gasified ash, 21 parts of silicon dioxide, 20 parts of calcium oxide, 10 parts of cement, 3.5 parts of gypsum, 0.9 part of aluminum powder and 62.6 parts of water.
6. A method of making an aerated concrete block from gasified ash as claimed in any one of claims 1 to 5, wherein: the preparation method comprises the following steps:
step 1: crushing and grinding the gasified ash until the gasified ash is 60-70 microns;
step 2: crushing and grinding the silicon dioxide until the silicon dioxide is 60-70 microns;
and step 3: uniformly mixing the gasified ash and silicon dioxide ground in the steps 1 and 2;
and 4, step 4: adding calcium oxide into the gasified ash and silicon dioxide which are uniformly mixed in the step 3, and uniformly stirring to prepare a semi-finished product mixture;
and 5: adding cement into the semi-finished product mixture in the step 4, and uniformly stirring;
step 6: adding gypsum into the semi-finished product mixture added with the cement in the step 5, and uniformly stirring;
and 7: adding water into the semi-finished product mixture added with the gypsum in the step 6, and stirring for 3-4 min;
and 8: adding aluminum powder into the mixture after the stirring is finished, wherein the aluminum powder is quickly added in the stirring process, and then pouring the mixture added with the aluminum powder into a mold for standing foaming and curing silicon-calcium reaction for initial setting; the time for adding the aluminum powder while stirring is as follows: 30-40 s;
and step 9: and (3) enabling the mixture in the step (8) to form a silicon-calcium reaction, wherein the temperature of the silicon-calcium reaction is 40-50 ℃, and the reaction time is as follows: 3.5-5 h, and then preparing a blank building block;
step 10: cutting and forming the blank building block, and placing the blank building block into an autoclave for autoclave reaction forming to obtain a finished product for sale; the temperature in the autoclave during the autoclave reaction is 185-200 ℃, the temperature is kept for 6-8 h under the constant temperature state, and the pressure is 1.2MPa.
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