CN110105034B - Natural curing aerated concrete block production process - Google Patents
Natural curing aerated concrete block production process Download PDFInfo
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- CN110105034B CN110105034B CN201910294703.2A CN201910294703A CN110105034B CN 110105034 B CN110105034 B CN 110105034B CN 201910294703 A CN201910294703 A CN 201910294703A CN 110105034 B CN110105034 B CN 110105034B
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- aerated concrete
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- artificial quartz
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/50—Producing shaped prefabricated articles from the material specially adapted for producing articles of expanded material, e.g. cellular concrete
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
- B28B17/02—Conditioning the material prior to shaping
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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
- C04B28/10—Lime cements or magnesium oxide 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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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
- C04B2111/40—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
Abstract
The invention provides a production process of a natural maintenance aerated concrete block, which comprises the following steps: (a) preparing mixed slurry, wherein the raw materials of the mixed slurry comprise artificial quartz stone waste, lime, cement and water; the mass ratio of the artificial quartz stone waste to the cement is 1: (0.8 to 1); (b) introducing steam into the mixed slurry to raise the temperature of the mixed slurry to 40-45 ℃, stirring for 3-4 min, adding a gas former, and stirring for less than or equal to 40s to prepare casting slurry; (c) pouring the casting slurry into a mold, and then performing gas generation and initial setting to prepare a blank; (d) and (4) naturally curing the blank, demoulding and cutting to obtain the aerated concrete block finished product. The production process has the characteristics of effective recycling of the waste resources of the artificial quartz stone, environmental friendliness, high finished product quality, energy conservation and cost reduction.
Description
Technical Field
The invention relates to a production process of a natural maintenance aerated concrete block, belonging to the field of building material processing.
Background
Most of wall materials used in the current buildings are brick bodies, clay bricks account for more than 80% of the total amount of the wall materials, a large amount of cultivated land needs to be occupied for producing building bricks every year, soil sources for brick making are exhausted day by day for a long time, ecological balance is destroyed, the cultivated land area is sharply reduced, and the chain reaction hazard generated by the method is extremely large. The aerated concrete block belongs to a novel energy-saving wall material in the first category, has excellent heat preservation, heat insulation and earthquake resistance, gradually replaces clay bricks with excellent performance, and continuously expands the application field. However, the existing aerated concrete block takes quartz sand as a main raw material, so that the resource consumption is high, and the resource is still easily exhausted.
The quartz stone production enterprises are taken as representatives, the amount of the artificial quartz stone waste discharged every year is extremely remarkable, and a reasonable and effective recycling method is still lacked at present, so that recyclable substances in the artificial quartz stone waste are treated in a traditional mode mainly by landfill, renewable resources are wasted, and adverse effects are brought to the environment.
Moreover, the curing mode commonly used in the production process of the aerated concrete block at present is steam pressure curing, and the curing mode has high energy consumption and high cost and brings pressure to the environment.
The technical problem to be solved by the technical field is how to obtain an aerated concrete block production process which effectively recycles waste resources of the artificial quartz stone, is beneficial to the environment, has high finished product quality, saves energy and reduces cost.
Disclosure of Invention
Aiming at the defects, the invention aims to provide a production process of a natural curing aerated concrete block, which has the characteristics of effective recycling of artificial quartz stone waste resources, contribution to environment, high finished product quality, energy conservation and cost reduction.
In order to achieve the purpose, the invention adopts the following technical scheme:
a production process of a natural maintenance aerated concrete block comprises the following steps:
(a) preparing mixed slurry, wherein the raw materials of the mixed slurry comprise artificial quartz stone waste, lime, cement and water; the mass ratio of the artificial quartz stone waste to the cement is 1: (0.8 to 1);
(b) introducing steam into the mixed slurry to raise the temperature of the mixed slurry to 40-45 ℃, stirring for 3-4 min, adding a gas former, and stirring for less than or equal to 40s to prepare casting slurry;
(c) pouring the casting slurry into a mold, and then performing gas generation and initial setting to prepare a blank;
(d) and (4) naturally curing the blank, demoulding and cutting to obtain the aerated concrete block finished product.
Preferably, the artificial quartz stone waste, the lime, the cement and the water in the step (a) comprise, by mass, 48-52 parts of the artificial quartz stone waste, 3-4 parts of the lime, 43-47 parts of the cement and 60-65 parts of water.
Preferably, the addition amount of the gas former in the step (b) is 0.1-5% of the total mass of the raw materials.
Preferably, in the step (b), one or two of a reinforcing agent and a water reducing agent are added while the gas former is added, wherein the adding amount of the reinforcing agent is 0.01-2% of the total mass of the raw materials, and the adding amount of the water reducing agent is 0.01-2% of the total mass of the raw materials.
Preferably, the content of silicon dioxide in the artificial quartz stone waste is more than or equal to 45 percent, the screen allowance of a 0.045mm square-hole screen is less than or equal to 30 percent, the loss on ignition is less than or equal to 5 percent, and the content of sulfur trioxide is less than or equal to 1 percent;
the content of the effective calcium oxide and the magnesium oxide of the lime is more than or equal to 65 percent, the content of the magnesium oxide is less than or equal to 8 percent, and the screen allowance of a 0.088mm square-hole screen is less than or equal to 20 percent;
the content of active ingredients of the gas former is more than or equal to 85 percent, and the screen allowance of a square-hole screen with 0.075mm is less than or equal to 3 percent.
Preferably, the step (a) is: pretreating the artificial quartz stone waste: mixing the artificial quartz stone waste with water, and then ball-milling to prepare artificial quartz stone waste slurry; lime pretreatment: grinding lime powder to prepare lime powder; mixing the artificial quartz stone waste slurry, the lime powder and the cement according to the formula amount, and stirring to prepare the mixed slurry.
Preferably, the gas-forming initial setting conditions in step (c) are as follows: standing for 90-150 min at the temperature of 45-55 ℃.
Preferably, the step (d) of natural curing: the green bodies are stacked for 14 to 28 days under the conditions of normal temperature and normal pressure.
Preferably, the raw material of the mixed slurry further comprises 0.3-1 part by mass of gypsum.
Preferably, the length, width and height of the aerated concrete block finished product are respectively 200 mm-400 mm, 100 mm-300 mm and 200 mm-300 mm.
The invention has the beneficial effects that: (1) according to the invention, silicon dioxide contained in the artificial quartz stone waste is reacted with lime and cement to form concrete, and the gas former is added to generate air holes in the concrete to form a porous structure, so that the heat insulation and anti-seismic performance is realized, the quality of the finished product of the prepared aerated concrete block reaches the standard, the aerated concrete block can be widely used in the building industry, the resource recycling of the artificial quartz stone waste is realized, and the environment protection is facilitated; (2) after the treatment of the process, the finished product of the aerated concrete block is prepared in a natural curing mode, and the quality of the finished product reaches the standard, so that the energy consumption for producing the aerated concrete block is effectively reduced, the energy is saved, the production cost is effectively reduced, and the process flow is simplified; (3) the reinforcing agent is used for adjusting the hardening speed of the casting slurry and adjusting the strength of the aerated concrete block finished product; the water reducing agent is an additive which can reduce the mixing water consumption under the condition of keeping the slump of concrete basically unchanged, has a dispersing effect on particles in a mixture after being added, improves the workability, reduces the water consumption, improves the fluidity and adjusts the strength of a finished product of the prepared aerated concrete block; (4) the invention takes the sludge generated in the cutting and polishing process of the artificial quartz stone as the main raw material after flocculation precipitation and filtration separation, reduces the pressure of sludge landfill to the environment, effectively utilizes the waste residue as a widely used building material, and provides a new regeneration way for the reutilization of the sludge generated in the cutting and polishing process of the artificial quartz stone.
Detailed Description
The technical solutions of the present invention will be described in detail below in order to clearly understand the technical features, objects, and advantages of the present invention, but the present invention is not limited to the practical scope of the present invention.
The invention provides a production process of a natural maintenance aerated concrete block, which comprises the following steps:
(a) preparing mixed slurry, wherein the raw materials of the mixed slurry comprise artificial quartz stone waste, lime, cement and water; the mass ratio of the artificial quartz stone waste to the cement is 1: (0.8 to 1);
(b) introducing steam into the mixed slurry to raise the temperature of the mixed slurry to 40-45 ℃, stirring for 3-4 min, adding a gas former, and stirring for less than or equal to 40s to prepare casting slurry;
(c) pouring the casting slurry into a mold, and then performing gas generation and initial setting to prepare a blank;
(d) and (4) naturally curing the blank, demoulding and cutting to obtain the aerated concrete block finished product.
According to the invention, silicon dioxide contained in the artificial quartz stone waste is reacted with lime and cement to form concrete, and the gas former is added to generate air holes in the concrete to form a porous structure, so that the heat insulation and anti-seismic performance is realized, the quality of the finished product of the prepared aerated concrete block reaches the standard, the aerated concrete block can be widely used in the building industry, the resource recycling of the artificial quartz stone waste is realized, and the environment protection is facilitated. The problems that the existing aerated concrete building blocks take quartz sand as a main raw material, the resource consumption is high, and meanwhile, a large amount of artificial quartz stone waste materials generated in the industrial production process of building materials lack reasonable and effective recycling and are accumulated and wasted, and adverse effects are brought to the environment are solved.
The invention sets the mass ratio of the artificial quartz stone waste to the cement as 1: (0.8-1), the cement in the mixed slurry can be effectively ensured to be completely reacted with silicon dioxide contained in the artificial quartz stone waste, the hydration rate of the hydrated calcium silicate gel is improved, and the compactness of the crystal structure is effectively improved. The mixed slurry is fully preheated to 40-45 ℃, and then the gas former is added to provide the temperature required by the gas former for gas generation and promote the gas generation, and then the mixed slurry is properly stirred and uniformly mixed to pour, so that the phenomenon that bubbles are expelled due to excessive stirring after the gas former is added is prevented. Then the casting slurry in the mold is fully aerated and solidified to form a blank with certain strength and porous structure. Through the process treatment, the aerated concrete block finished product is prepared in a natural curing mode, and the quality of the finished product reaches the standard, so that the energy consumption for producing the aerated concrete block is effectively reduced, the energy is saved, the production cost is effectively reduced, and the process flow is simplified. The problems of high energy consumption, high cost and environmental friendliness caused by the fact that an autoclaved curing mode is used for curing the aerated concrete block in the existing production process are solved.
Further, the artificial quartz stone waste, the lime, the cement and the water in the step (a) comprise, by mass, 48-52 parts of the artificial quartz stone waste, 3-4 parts of the lime, 43-47 parts of the cement and 60-65 parts of water.
The above components are reasonable in proportion, the artificial quartz stone waste is used as a main raw material, lime and cement are added, the accelerated conversion of gel substances contained in a subsequent blank in the natural curing process is facilitated, the natural curing is further realized, the prepared aerated concrete block reaches the industrial standard, the aerated concrete block can be widely used in the building industry, the resource recycling of the artificial quartz stone waste is realized, and the environmental protection is facilitated.
Further, the addition amount of the gas former in the step (b) is 0.1-5% of the total mass of the raw materials.
The foaming agent enables the casting slurry to generate air holes to form a porous structure, so that the weight of the finished product is lightened, and the damping effect is realized. Preferably, the gas former is an aluminum powder foaming agent, aluminum powder reacts with water in an alkaline environment, and initially generated hydrogen is immediately dissolved in a liquid phase. The solution quickly reached supersaturation due to the poor solubility of hydrogen. When a certain supersaturation degree is reached, one or a plurality of bubble nuclei are formed on the surface of the aluminum powder particles, the pressure in the bubbles is gradually increased due to the gradual accumulation of hydrogen, and the bubbles grow to push the slurry to expand upwards after the internal pressure overcomes the gravity of the upper slurry and the limit shear stress of the slurry. After the bubbles grow up, the internal pressure is reduced, and the expansion is nearly stopped; however, because hydrogen is continuously supplemented, the internal pressure is increased again, bubbles grow further, and finally the concrete expands further.
Further, in the step (b), one or two of a reinforcing agent and a water reducing agent are added while the gas former is added, wherein the adding amount of the reinforcing agent is 0.01-2% of the total mass of the raw materials, and the adding amount of the water reducing agent is 0.01-2% of the total mass of the raw materials.
The reinforcing agent is used for adjusting the hardening speed of the casting slurry and adjusting the strength of the aerated concrete block finished product; the water reducing agent is an additive which can reduce the mixing water consumption under the condition of keeping the slump of concrete basically unchanged, has a dispersing effect on particles in a mixture after being added, improves the workability, reduces the water consumption, improves the fluidity and adjusts the strength of a finished product of the prepared aerated concrete block. Preferably, the water reducing agent is a lignosulfonate or a naphthalene sulfonate formaldehyde polymer. During the production process of the aerated concrete block, the addition amount of the reinforcing agent and the water reducing agent can be properly adjusted according to the strength requirement of the prepared finished product.
Furthermore, the content of silicon dioxide in the artificial quartz stone waste is more than or equal to 45 percent, the screen allowance of a 0.045mm square-hole screen is less than or equal to 30 percent, the loss on ignition is less than or equal to 5 percent, and the content of sulfur trioxide is less than or equal to 1 percent;
the content of the effective calcium oxide and the magnesium oxide of the lime is more than or equal to 65 percent, the content of the magnesium oxide is less than or equal to 8 percent, and the screen allowance of a 0.088mm square-hole screen is less than or equal to 20 percent;
the content of active ingredients of the gas former is more than or equal to 85 percent, and the screen allowance of a square-hole screen with 0.075mm is less than or equal to 3 percent.
During the production process of the artificial quartz stone, a large amount of waste materials are generated. The waste materials are mainly treated in a landfill mode, and resources are not utilized fully. The main raw material component of the invention is the artificial quartz stone waste, so that the silicon dioxide rich in the artificial quartz stone waste is subjected to hydration reaction with lime and cement to form concrete, and the aerated concrete block finally prepared is used as a widely-used building material.
Further, the waste is sludge produced in the cutting and polishing process of the artificial quartz stone and obtained by flocculation, precipitation, filtration and separation. The slurry generated in the cutting and polishing process of the artificial quartz stone is generally treated with the wastewater together, and the sludge obtained by the subsequent separation is not reasonably utilized and is still mainly treated by landfill, so that the resources are not fully utilized. The invention discloses a method for preparing aerated concrete block, which is characterized in that the waste material of the artificial quartz stone is the sludge, so that the pressure of sludge landfill to the environment is reduced, meanwhile, the silica rich in the sludge is fully utilized to react with lime and cement to form concrete, and the finally prepared aerated concrete block is used as a widely-used building material, so that the sludge is effectively utilized, and a new regeneration way is provided for the reutilization of slurry generated in the cutting and polishing processes of the artificial quartz stone.
The foaming agent enables the casting slurry to generate air holes to form a porous structure, so that the weight of the prepared finished product is lightened, and the heat-insulating and shock-absorbing effects are realized. Controlling the content of active ingredients of the gas former, ensuring the gas forming effect and the gas forming amount of the gas former, and enabling the interior of the aerated concrete block to have an enough porous structure; the fineness of the gas generating agent is controlled, so that the gas generating agent is easily and uniformly distributed in the casting slurry, and gas bubbles after gas generation are uniformly distributed in the aerated concrete block, so that the prepared aerated concrete block finished product has uniform heat preservation and shock absorption performance.
Further, the step (a) is: pretreating the artificial quartz stone waste: mixing the artificial quartz stone waste with water, and then ball-milling to prepare artificial quartz stone waste slurry; lime pretreatment: grinding lime powder to prepare lime powder; mixing the artificial quartz stone waste slurry, the lime powder and the cement according to the formula amount, and stirring to prepare the mixed slurry.
The artificial quartz stone waste and lime are pretreated to enable raw material particles to reach the target fineness, the texture of the mixed slurry is adjusted, and the strength of the prepared aerated concrete block is improved. The artificial quartz stone waste material raw material particles are too large, water needs to be added for ball milling, the fineness of the artificial quartz stone waste material raw material particles meets the use requirement, and the artificial quartz stone waste slurry is formed.
Lime powder and cement are dry powder, and the synthetic quartz stone waste slurry is aqueous slurry, and through adjusting the water content of the synthetic quartz stone waste slurry, and then adjust the solid content of the mixed slurry that the three mixes and obtain, make the mobility of mixed slurry comparatively moderate, be favorable to mixing after the gassing of the cooperation of the gassing agent of granule in the slurry and follow-up addition, form suitable gas pocket density, make the aerated concrete block finished product that makes compromise heat preservation shock attenuation and intensity.
Further, the condition of initial setting of the gas generated in the step (c): standing for 90-150 min at the temperature of 45-55 ℃. Standing the cast slurry at the temperature of 45-55 ℃ after entering the mold, and enabling the gas forming agent to smoothly form gas in the concrete; the time is 90-150 min, the sufficient gas generation of the gas former is ensured, so that the aerated concrete block can obtain enough gas holes, and the heat insulation and seismic resistance of the aerated concrete block are realized.
Further, step (d) natural curing: the green bodies are stacked for 14 to 28 days under the conditions of normal temperature and normal pressure. By using the production process, the blank can be solidified into an aerated concrete block finished product with standard strength in a natural curing mode that the blank is only stacked for 14-28 days under normal temperature and pressure, and the problems of high cost, large energy consumption and adverse environmental protection caused by an autoclaved curing process are solved.
Furthermore, the raw material of the mixed slurry also comprises 0.3-1 part by mass of gypsum. A small amount of gypsum is added into the mixed slurry, which is helpful for accelerating the coagulation speed of the green body, ensuring the early strength, effectively shortening the natural curing period of the green body and shortening the production time of the aerated concrete block finished product.
Further, the length, width and height of the aerated concrete block finished product are respectively 200 mm-400 mm, 100 mm-300 mm and 200 mm-300 mm. The aerated concrete block finished product is more convenient to lay and stick, can meet the use requirement, is beneficial to maintaining the integrity of the brick body easily in the porous structure, and the strength of the wall body which is combined can meet the standard and is more durable.
Group of embodiments
The production process of the natural curing aerated concrete block is used for preparing a finished product of the aerated concrete block, and comprises the following steps:
(a) pretreating the artificial quartz stone waste, lime and water, mixing the pretreated artificial quartz stone waste, the lime and the water with cement according to a formula ratio, and stirring to prepare mixed slurry; the adding amount of the artificial quartz stone waste, the lime and the cement and the solid content of the mixed slurry are set according to the following table I;
(b) introducing steam into the mixed slurry to raise the temperature of the mixed slurry to 45 ℃, stirring for 4min, adding a gas former, and stirring for 40s to prepare casting slurry; the addition amount of the gas former is set according to the following table I;
(c) pouring the casting slurry into a mold, and then performing gas generation and initial setting to prepare a blank; setting the specific setting temperature and standing time of the initial setting of the gas generation according to the following table II;
(d) stacking the green bodies under the conditions of normal temperature and normal pressure, and then demoulding and cutting to prepare the finished aerated concrete block; the stacking time was set as follows.
Table one example composition content and solid content setting table
Table two examples set condition setting table
Examples 1-5 were prepared according to the above procedure and were tested for their performance as shown in table three below:
table three example set of performance tests
As can be seen from table three, the aerated concrete block finished products obtained in the above examples 1 to 5 were subjected to performance tests, and the results of the tests are as shown in the table above, which proves that the aerated concrete block finished products prepared by using the natural curing aerated concrete block production process reach the standard, and the reuse of the artificial quartz stone waste is realized.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (8)
1. A production process of a natural maintenance aerated concrete block is characterized by comprising the following steps: the method comprises the following steps:
(a) preparing mixed slurry, wherein the raw materials of the mixed slurry comprise artificial quartz stone waste, lime, cement and water; the mass ratio of the artificial quartz stone waste to the cement is 1: (0.8 to 1);
(b) introducing steam into the mixed slurry to raise the temperature of the mixed slurry to 40-45 ℃, stirring for 3-4 min, adding a gas former, and stirring for less than or equal to 40s to prepare casting slurry;
(c) pouring the casting slurry into a mold, and then performing gas generation and initial setting to prepare a blank;
(d) and (4) naturally curing the blank, demoulding and cutting to obtain the aerated concrete block finished product.
The condition of initial setting of the gas generation in the step (c) is as follows: standing for 90-150 min at the temperature of 45-55 ℃;
the step (d) of natural curing: the green bodies are stacked for 14 to 28 days under the conditions of normal temperature and normal pressure.
2. The natural curing aerated concrete block production process according to claim 1, characterized in that: the artificial quartz stone waste, the lime, the cement and the water in the step (a) are prepared from 48-52 parts by mass of the artificial quartz stone waste, 3-4 parts by mass of the lime, 43-47 parts by mass of the cement and 60-65 parts by mass of the water.
3. The natural curing aerated concrete block production process according to claim 1, characterized in that: the addition amount of the gas former in the step (b) is 0.1-5% of the total mass of the raw materials.
4. The natural curing aerated concrete block production process according to claim 3, characterized in that: and (b) adding one or two of a reinforcing agent and a water reducing agent while adding the gas former, wherein the adding amount of the reinforcing agent is 0.01-2% of the total mass of the raw materials, and the adding amount of the water reducing agent is 0.01-2% of the total mass of the raw materials.
5. The natural curing aerated concrete block production process according to claim 3, characterized in that: the content of silicon dioxide in the artificial quartz stone waste is more than or equal to 45 percent, the balance of a 0.045mm square-hole sieve is less than or equal to 30 percent, the loss on ignition is less than or equal to 5 percent, and the content of sulfur trioxide is less than or equal to 1 percent;
the content of the effective calcium oxide and the magnesium oxide of the lime is more than or equal to 65 percent, the content of the magnesium oxide is less than or equal to 8 percent, and the screen allowance of a 0.088mm square-hole screen is less than or equal to 20 percent;
the content of active ingredients of the gas former is more than or equal to 85 percent, and the screen allowance of a square-hole screen with 0.075mm is less than or equal to 3 percent.
6. The natural curing aerated concrete block production process according to claim 3, characterized in that: the step (a) is as follows: pretreating the artificial quartz stone waste: mixing the artificial quartz stone waste with water, and then ball-milling to prepare artificial quartz stone waste slurry; lime pretreatment: grinding lime powder to prepare lime powder; mixing the artificial quartz stone waste slurry, the lime powder and the cement according to the formula amount, and stirring to prepare the mixed slurry.
7. The natural curing aerated concrete block production process according to claim 1, characterized in that: the raw materials of the mixed slurry also comprise gypsum, and the mass part of the gypsum is 0.3-1 part.
8. The natural curing aerated concrete block production process according to claim 1, characterized in that: the length, width and height of the aerated concrete block finished product are respectively 200 mm-400 mm, 100 mm-300 mm and 200 mm-300 mm.
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