阅读说明：本技术 含有工业固体废弃物的蒸压加气混凝土砌块及其制备方法 (Autoclaved aerated concrete block containing industrial solid waste and preparation method thereof ) 是由 孙坚强 崔爱华 徐林菲 张永牧 于 2021-09-15 设计创作，主要内容包括：本发明涉及含有工业固体废弃物的蒸压加气混凝土砌块及其制备方法,属于建筑材料技术领域,包括如下重量份原料：15-35份多元复合纤维,60-75份工业固体废弃物,1.5-3份脱硫石膏,5-15份水泥,3-5份石蜡；通过工业固体废弃物等作为原料,能够实现废弃资源的再利用,符合环保要求,而且制备出一种多元复合纤维,先纺丝出初生纤维,之后加热拉伸进行热酰亚胺化,制备出多元复合纤维,通过多元复合,赋予该纤维优异的韧性和强度,之后与石蜡形成涂覆料,涂覆至模箱的内表面,随着石蜡的融化部分渗入砌块当中,该高韧高强度的复合纤维进一步地加强了砌块体之间的接合强度,从而增强了砌块建筑成的建筑的整体强度。(The invention relates to an autoclaved aerated concrete block containing industrial solid waste and a preparation method thereof, belonging to the technical field of building materials and comprising the following raw materials in parts by weight: 15-35 parts of multi-element composite fiber, 60-75 parts of industrial solid waste, 1.5-3 parts of desulfurized gypsum, 5-15 parts of cement and 3-5 parts of paraffin; the industrial solid waste and the like are used as raw materials, so that the waste resources can be recycled, the environmental protection requirement is met, the polynary composite fiber is prepared, the nascent fiber is spun firstly, then the heating and stretching are carried out for thermal imidization, the polynary composite fiber is prepared, the fiber is endowed with excellent toughness and strength through polynary compounding, then the coating material is formed with paraffin and coated on the inner surface of a mold box, the bonding strength between block bodies is further enhanced by the high-toughness high-strength composite fiber along with the penetration of the melting part of the paraffin into the block bodies, and the overall strength of a building constructed by the block bodies is enhanced.)

1. The autoclaved aerated concrete block containing industrial solid waste is characterized in that: the feed comprises the following raw materials in parts by weight: 15-35 parts of multi-element composite fiber, 60-75 parts of industrial solid waste, 1.5-3 parts of desulfurized gypsum, 5-15 parts of cement and 3-5 parts of paraffin;

the multi-element composite fiber is prepared by the following steps:

step S1, adding graphite oxide into N, N-dimethylacetamide, ultrasonically dispersing for 1h, placing in an ice-water bath, introducing nitrogen, discharging air, adding 4, 4' -diaminodiphenyl ether, uniformly stirring until dissolving, adding pyromellitic dianhydride in equal amount for two times, uniformly stirring until dissolving, and continuously stirring for 4h to obtain a mixed solution a;

and step S2, adding the glass fiber into a sodium hydroxide solution, carrying out ultrasonic treatment for 30min to obtain the treated glass fiber, taking out, washing and grinding to obtain glass fiber powder, adding the glass fiber powder into the mixed solution a, stirring at a constant speed for 15min to obtain a spinning solution, carrying out vacuum defoaming, pouring the spinning solution into a spinning kettle for spinning, introducing nitrogen, spinning the fiber into a coagulating bath to obtain nascent fiber, and treating the nascent fiber at 100 ℃ and 200 ℃ for 1h respectively to obtain the polynary composite fiber.

2. The autoclaved aerated concrete block containing industrial solid waste according to claim 1, characterized in that: the graphite oxide is prepared by the following steps: adding graphite into a reaction kettle, adding sodium nitrate and 98 mass percent concentrated sulfuric acid, stirring in an ice bath for 15min, adding potassium permanganate in three times with equal amount, continuously stirring for 30min at an interval of 5min each time, heating in a water bath at 40 ℃, reacting for 3h, adding deionized water, heating to 75 ℃, reacting for 30min, adding 10 mass percent aqueous hydrogen peroxide solution, continuously reacting for 10min, filtering and washing to obtain the graphite oxide.

3. The autoclaved aerated concrete block containing industrial solid waste according to claim 2, characterized in that: the dosage ratio of the graphite, the sodium nitrate, the concentrated sulfuric acid, the potassium permanganate and the aqueous hydrogen peroxide solution is controlled to be 5g to 2.5g to 150mL to 15g to 15-20 mL.

4. The autoclaved aerated concrete block containing industrial solid waste according to claim 1, characterized in that: in step S1, the dosage ratio of the graphite oxide, the N, N-dimethylacetamide, the 4, 4' -diaminodiphenyl ether and the pyromellitic dianhydride is controlled to be 1 g: 100 mL: 10g, in step S2, the dosage ratio of the glass fiber and the sodium hydroxide solution is controlled to be 1 g: 10mL, and the weight ratio of the treated glass fiber to the mixed solution a is 1.5-2.5: 10.

5. The autoclaved aerated concrete block containing industrial solid waste according to claim 1, characterized in that: in the step S2, the coagulating bath is formed by mixing water and absolute ethyl alcohol according to the volume ratio of 9: 1, and the temperature of the coagulating bath is 25-40 ℃.

6. The autoclaved aerated concrete block containing industrial solid waste according to claim 1, characterized in that: in the step S2, the spinning temperature is 15-30 ℃, the spinning pressure is 0.5-0.6MPa, and the drawing speed is 30-40 m/min.

7. The preparation method of the autoclaved aerated concrete block containing the industrial solid waste according to claim 1, which is characterized in that: the method comprises the following steps:

firstly, adding water into industrial solid waste, desulfurized gypsum and cement, mixing uniformly, adding an aluminum powder paste foaming agent to prepare a slurry, heating and melting paraffin, adding a multi-element composite fiber, and uniformly stirring to prepare a coating material, wherein the dosage of the aluminum powder paste foaming agent is 0.03-0.05% of the slurry, and the dosage of the water is the sum of the weights of the industrial solid waste, the desulfurized gypsum and the cement;

secondly, coating the coating material on the inner surface of the mold box until the coating material is solidified, removing supernatant from the prepared slurry, pouring the slurry into the mold box, controlling the pouring temperature to be 40-50 ℃, then, allowing the slurry to outgas for 30min, standing and pre-curing for 3h to obtain a blank;

and thirdly, placing the blank body in an autoclave for autoclave curing to obtain the concrete block.

8. The method for preparing the autoclaved aerated concrete block containing the industrial solid waste according to claim 7, which is characterized in that: the third step of steam pressure curing conditions is as follows: the temperature is increased to 190 ℃, the vacuum is pumped to-0.06 MPa, the pressure is increased to 1.0-1.5MPa, the pressure is maintained for 8h, and the pressure is reduced to normal pressure.

Technical Field

The invention belongs to the technical field of building materials, and particularly relates to an autoclaved aerated concrete block containing industrial solid wastes and a preparation method thereof.

Background

At present, a plurality of construction slurry curing treatment centers in the market adopt a dehydration and consolidation integrated treatment technology, so that the reduction of construction slurry is effectively realized, but mud cakes generated after dehydration and consolidation are generally used as solid wastes and directly entrusted to a slag team for external transportation and landfill treatment. The treatment mode not only causes the waste of resources, but also destroys the ecological environment.

The autoclaved aerated concrete block is a novel building wall material which is light and has closed micropores and is prepared by taking fly ash, cement, lime, gypsum and the like as main raw materials, adding a proper amount of gas former, pouring, standing still, cutting, forming and high-temperature steam curing. The autoclaved aerated concrete block has the advantages of light volume weight, heat preservation, heat insulation, water resistance, sound absorption, good earthquake resistance, convenient field construction and the like, is mainly suitable for a filling wall, a non-bearing partition wall, a composite heat preservation layer of a peripheral retaining wall of an energy-saving building, a self-heat preservation outer wall, a roof heat preservation layer and the like of a frame and a high-rise building, but the structure of a bonding part between the blocks is not compact enough, so that the strength of the formed building body is poor, and the service life and the safety of the building are influenced.

Disclosure of Invention

The invention aims to provide an autoclaved aerated concrete block containing industrial solid waste and a preparation method thereof.

The purpose of the invention can be realized by the following technical scheme:

the autoclaved aerated concrete block containing the industrial solid waste comprises the following raw materials in parts by weight: 15-35 parts of multi-element composite fiber, 60-75 parts of industrial solid waste, 1.5-3 parts of desulfurized gypsum, 5-15 parts of cement and 3-5 parts of paraffin;

the multi-element composite fiber is prepared by the following steps:

step S1, adding graphite into a reaction kettle, adding sodium nitrate and concentrated sulfuric acid with mass fraction of 98%, stirring for 15min in an ice bath, adding potassium permanganate in three times with equal amount, continuously stirring for 30min at intervals of 5min each time, heating in a water bath at 40 ℃, reacting for 3h, adding deionized water, heating to 75 ℃, reacting for 30min, adding aqueous hydrogen peroxide with mass fraction of 10%, continuously reacting for 10min, filtering and washing to obtain graphite oxide, wherein the dosage ratio of the graphite, the sodium nitrate, the concentrated sulfuric acid, the potassium permanganate and the aqueous hydrogen peroxide is controlled to be 5 g: 2.5 g: 150 mL: 15 g: 15-20 mL;

in the step S1, modifying graphite by a Hummers method to prepare graphite oxide, and grafting rich oxygen-containing functional groups on the surface of the graphite to prevent the graphite oxide from agglomerating;

step S2, adding graphite oxide into N, N-dimethylacetamide, ultrasonically dispersing for 1h, placing in an ice-water bath, introducing nitrogen, discharging air, adding 4,4 '-diaminodiphenyl ether, uniformly stirring until dissolving, adding pyromellitic dianhydride in equal amount for two times, uniformly stirring until dissolving, continuously stirring for 4h to prepare a mixed solution a, and controlling the dosage ratio of the graphite oxide, the N, N-dimethylacetamide, the 4, 4' -diaminodiphenyl ether and the pyromellitic dianhydride to be 1 g: 100 mL: 10 g;

in the step S2, graphite oxide is dispersed in N, N-dimethylacetamide, 4, 4' -diaminodiphenyl ether and pyromellitic dianhydride are subjected to polymerization reaction at low temperature to form polyamide, and mixed liquid a is prepared and is mixed liquid of graphite oxide and polyamide;

step S3, adding glass fiber into sodium hydroxide solution with the concentration of 5-10mol/L, carrying out ultrasonic treatment for 30min to obtain treated glass fiber, taking out, washing and grinding to obtain glass fiber powder, adding the glass fiber powder into the mixed solution a, stirring at a constant speed for 15min to obtain spinning solution, carrying out vacuum defoamation, pouring into a spinning kettle for spinning, introducing nitrogen, spinning the fiber into a coagulating bath to obtain nascent fiber, treating the nascent fiber at 100 ℃ and 200 ℃ for 1h respectively to obtain polynary composite fiber, controlling the dosage ratio of the glass fiber to the sodium hydroxide solution to be 1 g: 10mL, and controlling the weight ratio of the treated glass fiber to the mixed solution a to be 1.5-2.5: 10.

And step S3, performing alkali treatment on the glass fiber to prepare the treated glass fiber, wherein the glass fiber has a rough surface and can improve the specific surface area and the adsorption performance of the glass fiber, then grinding the glass fiber, adding the ground glass fiber into the mixed solution a to prepare spinning solution, spinning to obtain nascent fiber, and the nascent fiber is a glass/graphite oxide/polyamide multi-element composite fiber, then heating and stretching the nascent fiber for thermal imidization to prepare multi-element composite fiber, and endowing the fiber with excellent toughness and strength through multi-element compounding.

Further: in the step S3, the coagulating bath is formed by mixing water and absolute ethyl alcohol according to the volume ratio of 9: 1, and the temperature of the coagulating bath is 25-40 ℃.

Further: in the step S3, the spinning temperature is 15-30 ℃, the spinning pressure is 0.5-0.6MPa, and the drawing speed is 30-40 m/min.

The preparation method of the autoclaved aerated concrete block containing the industrial solid waste comprises the following steps:

firstly, adding water into industrial solid waste, desulfurized gypsum and cement, mixing uniformly, adding an aluminum powder paste foaming agent to prepare a slurry, heating and melting paraffin, adding a multi-element composite fiber, and uniformly stirring to prepare a coating material, wherein the dosage of the aluminum powder paste foaming agent is 0.03-0.05% of the slurry, and the dosage of the water is the sum of the weights of the industrial solid waste, the desulfurized gypsum and the cement;

secondly, coating the coating material on the inner surface of the mold box until the coating material is solidified, removing supernatant from the prepared slurry, pouring the slurry into the mold box, controlling the pouring temperature to be 40-50 ℃, then, allowing the slurry to outgas for 30min, standing and pre-curing for 3h to obtain a blank;

and thirdly, placing the blank body in an autoclave for autoclave curing to obtain the concrete block.

Further: the third step of steam pressure curing conditions is as follows: the temperature is increased to 190 ℃, the vacuum is pumped to-0.06 MPa, the pressure is increased to 1.0-1.5MPa, the pressure is maintained for 8h, and the pressure is reduced to normal pressure.

The invention has the beneficial effects that:

the concrete block of the invention can realize the reutilization of waste resources by taking industrial solid wastes and the like as raw materials, meets the requirement of environmental protection, and prepares a multi-element composite fiber, the glass fiber is subjected to alkali treatment to prepare the treated glass fiber, the surface of the glass fiber is rough, the specific surface area of the glass fiber can be improved, the adsorption property is improved, then the glass fiber is ground and added into the mixed solution a to prepare spinning solution, spinning to obtain nascent fiber, the nascent fiber is a glass/graphite oxide/polyamide multi-element composite fiber, then the glass/graphite oxide/polyamide multi-element composite fiber is heated, stretched and thermally imidized to prepare the multi-element composite fiber, the fiber is endowed with excellent toughness and strength by multi-element compounding, then forms a coating material with paraffin, the coating material is coated on the inner surface of a mold box, and part of the coating material penetrates into the block body along with the melting part of the paraffin, when the building block is used for construction, the other part of the glass fiber immersed in the building block is immersed in the adhesive between the building blocks, and the high-toughness high-strength composite fiber further enhances the joint strength between the building blocks, so that the overall strength of the building constructed by the building block is enhanced.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The multi-element composite fiber is prepared by the following steps:

step S1, adding graphite into a reaction kettle, adding sodium nitrate and concentrated sulfuric acid with the mass fraction of 98%, stirring for 15min in an ice bath, adding potassium permanganate in three times with equal amount, continuously stirring for 30min at intervals of 5min each time, heating in a water bath at 40 ℃, reacting for 3h, adding deionized water, heating to 75 ℃, reacting for 30min, adding aqueous hydrogen peroxide with the mass fraction of 10%, continuously reacting for 10min, filtering and washing to obtain graphite oxide, and controlling the dosage ratio of the graphite, the sodium nitrate, the concentrated sulfuric acid, the potassium permanganate and the aqueous hydrogen peroxide to be 5 g: 2.5 g: 150 mL: 15 g: 15 mL;

step S2, adding graphite oxide into N, N-dimethylacetamide, ultrasonically dispersing for 1h, placing in an ice-water bath, introducing nitrogen, discharging air, adding 4,4 '-diaminodiphenyl ether, uniformly stirring until dissolving, adding pyromellitic dianhydride in equal amount for two times, uniformly stirring until dissolving, continuously stirring for 4h to prepare a mixed solution a, and controlling the dosage ratio of the graphite oxide, the N, N-dimethylacetamide, the 4, 4' -diaminodiphenyl ether and the pyromellitic dianhydride to be 1 g: 100 mL: 10 g;

step S3, adding glass fiber into 5mol/L sodium hydroxide solution, carrying out ultrasonic treatment for 30min to obtain treated glass fiber, taking out, washing and grinding to obtain glass fiber powder, adding the glass fiber powder into the mixed solution a, stirring at a constant speed for 15min to obtain spinning solution, pouring the spinning solution into a spinning kettle for spinning after vacuum defoamation, introducing nitrogen, spinning the fiber into a coagulating bath to obtain nascent fiber, treating the nascent fiber at 100 ℃ and 200 ℃ for 1h respectively to obtain polynary composite fiber, controlling the dosage ratio of the glass fiber to the sodium hydroxide solution to be 1 g: 10mL, and controlling the weight ratio of the treated glass fiber to the mixed solution a to be 1.5: 10.

The coagulating bath is formed by mixing water and absolute ethyl alcohol according to the volume ratio of 9: 1, and the temperature of the coagulating bath is 25 ℃.

The spinning temperature is 15 ℃, the spinning pressure is 0.5MPa, and the traction speed is 30 m/min.

Example 2

The multi-element composite fiber is prepared by the following steps:

step S1, adding graphite into a reaction kettle, adding sodium nitrate and concentrated sulfuric acid with the mass fraction of 98%, stirring for 15min in an ice bath, adding potassium permanganate in three times with equal amount, continuously stirring for 30min at intervals of 5min each time, heating in a water bath at 40 ℃, reacting for 3h, adding deionized water, heating to 75 ℃, reacting for 30min, adding aqueous hydrogen peroxide with the mass fraction of 10%, continuously reacting for 10min, filtering and washing to obtain graphite oxide, and controlling the dosage ratio of the graphite, the sodium nitrate, the concentrated sulfuric acid, the potassium permanganate and the aqueous hydrogen peroxide to be 5 g: 2.5 g: 150 mL: 15 g: 18 mL;

step S2, adding graphite oxide into N, N-dimethylacetamide, ultrasonically dispersing for 1h, placing in an ice-water bath, introducing nitrogen, discharging air, adding 4,4 '-diaminodiphenyl ether, uniformly stirring until dissolving, adding pyromellitic dianhydride in equal amount for two times, uniformly stirring until dissolving, continuously stirring for 4h to prepare a mixed solution a, and controlling the dosage ratio of the graphite oxide, the N, N-dimethylacetamide, the 4, 4' -diaminodiphenyl ether and the pyromellitic dianhydride to be 1 g: 100 mL: 10 g;

step S3, adding glass fiber into 8mol/L sodium hydroxide solution, carrying out ultrasonic treatment for 30min to obtain treated glass fiber, taking out, washing and grinding to obtain glass fiber powder, adding the glass fiber powder into the mixed solution a, stirring at a constant speed for 15min to obtain spinning solution, pouring the spinning solution into a spinning kettle for spinning after vacuum defoamation, introducing nitrogen, spinning the fiber into a coagulating bath to obtain nascent fiber, treating the nascent fiber at 100 ℃ and 200 ℃ for 1h respectively to obtain polynary composite fiber, controlling the dosage ratio of the glass fiber to the sodium hydroxide solution to be 1 g: 10mL, and controlling the weight ratio of the treated glass fiber to the mixed solution a to be 2: 10.

The coagulating bath is formed by mixing water and absolute ethyl alcohol according to the volume ratio of 9: 1, and the temperature of the coagulating bath is 40 ℃.

The spinning temperature is 30 ℃, the spinning pressure is 0.6MPa, and the traction speed is 40 m/min.

Example 3

The multi-element composite fiber is prepared by the following steps:

step S1, adding graphite into a reaction kettle, adding sodium nitrate and concentrated sulfuric acid with the mass fraction of 98%, stirring for 15min in an ice bath, adding potassium permanganate in three times with equal amount, continuously stirring for 30min at intervals of 5min each time, heating in a water bath at 40 ℃, reacting for 3h, adding deionized water, heating to 75 ℃, reacting for 30min, adding aqueous hydrogen peroxide with the mass fraction of 10%, continuously reacting for 10min, filtering and washing to obtain graphite oxide, and controlling the dosage ratio of the graphite, the sodium nitrate, the concentrated sulfuric acid, the potassium permanganate and the aqueous hydrogen peroxide to be 5 g: 2.5 g: 150 mL: 15 g: 20 mL;

step S2, adding graphite oxide into N, N-dimethylacetamide, ultrasonically dispersing for 1h, placing in an ice-water bath, introducing nitrogen, discharging air, adding 4,4 '-diaminodiphenyl ether, uniformly stirring until dissolving, adding pyromellitic dianhydride in equal amount for two times, uniformly stirring until dissolving, continuously stirring for 4h to prepare a mixed solution a, and controlling the dosage ratio of the graphite oxide, the N, N-dimethylacetamide, the 4, 4' -diaminodiphenyl ether and the pyromellitic dianhydride to be 1 g: 100 mL: 10 g;

step S3, adding glass fiber into 10mol/L sodium hydroxide solution, carrying out ultrasonic treatment for 30min to obtain treated glass fiber, taking out, washing and grinding to obtain glass fiber powder, adding the glass fiber powder into the mixed solution a, stirring at a constant speed for 15min to obtain spinning solution, pouring the spinning solution into a spinning kettle for spinning after vacuum defoamation, introducing nitrogen, spinning the fiber into a coagulating bath to obtain nascent fiber, treating the nascent fiber at 100 ℃ and 200 ℃ for 1h respectively to obtain polynary composite fiber, controlling the dosage ratio of the glass fiber to the sodium hydroxide solution to be 1 g: 10mL, and controlling the weight ratio of the treated glass fiber to the mixed solution a to be 2.5: 10.

The coagulating bath is formed by mixing water and absolute ethyl alcohol according to the volume ratio of 9: 1, and the temperature of the coagulating bath is 40 ℃.

The spinning temperature is 30 ℃, the spinning pressure is 0.6MPa, and the traction speed is 40 m/min.

Example 4

The autoclaved aerated concrete block containing the industrial solid waste comprises the following raw materials in parts by weight: 15 parts of multi-element composite fiber, 60 parts of fly ash, 1.5 parts of desulfurized gypsum, 5 parts of cement and 3 parts of paraffin;

firstly, adding water into industrial solid waste, desulfurized gypsum and cement, mixing uniformly, adding an aluminum powder paste foaming agent to prepare a slurry, heating and melting paraffin, adding multi-element composite fiber, and uniformly stirring to prepare a coating material, wherein the dosage of the aluminum powder paste foaming agent is 0.03 percent of that of the slurry, and the dosage of water is the sum of the weights of the industrial solid waste, the desulfurized gypsum and the cement;

secondly, coating the coating material on the inner surface of the mold box until the coating material is solidified, removing supernatant from the prepared slurry, pouring the slurry into the mold box, controlling the pouring temperature to be 40 ℃, then, allowing the slurry to generate gas for 30min, and standing for precuring for 3h to obtain a blank;

and thirdly, placing the blank body in an autoclave for autoclave curing, wherein the temperature of the autoclave curing is 180 ℃, vacuumizing to-0.06 MPa, boosting the pressure to 1.0MPa, maintaining the pressure for 8 hours, and reducing the pressure to normal pressure to obtain the concrete block.

Example 5

The autoclaved aerated concrete block containing the industrial solid waste comprises the following raw materials in parts by weight: 20 parts of multi-element composite fiber, 65 parts of fly ash, 2 parts of desulfurized gypsum, 10 parts of cement and 4 parts of paraffin;

firstly, adding water into industrial solid waste, desulfurized gypsum and cement, mixing uniformly, adding an aluminum powder paste foaming agent to prepare a slurry, heating and melting paraffin, adding multi-element composite fiber, and uniformly stirring to prepare a coating material, wherein the dosage of the aluminum powder paste foaming agent is 0.03 percent of that of the slurry, and the dosage of water is the sum of the weights of the industrial solid waste, the desulfurized gypsum and the cement;

secondly, coating the coating material on the inner surface of the mold box until the coating material is solidified, removing supernatant from the prepared slurry, pouring the slurry into the mold box, controlling the pouring temperature to be 40 ℃, then, allowing the slurry to generate gas for 30min, and standing for precuring for 3h to obtain a blank;

and thirdly, placing the blank body in an autoclave for autoclave curing, wherein the temperature of the autoclave curing is 180 ℃, vacuumizing to-0.06 MPa, boosting the pressure to 1.0MPa, maintaining the pressure for 8 hours, and reducing the pressure to normal pressure to obtain the concrete block.

Example 6

The autoclaved aerated concrete block containing the industrial solid waste comprises the following raw materials in parts by weight: 35 parts of multi-element composite fiber, 75 parts of fly ash, 3 parts of desulfurized gypsum, 15 parts of cement and 5 parts of paraffin;

firstly, adding water into industrial solid waste, desulfurized gypsum and cement, mixing uniformly, adding an aluminum powder paste foaming agent to prepare a slurry, heating and melting paraffin, adding multi-element composite fiber, and uniformly stirring to prepare a coating material, wherein the dosage of the aluminum powder paste foaming agent is 0.05 percent of the slurry, and the dosage of water is the sum of the weights of the industrial solid waste, the desulfurized gypsum and the cement;

secondly, coating the coating material on the inner surface of the mold box until the coating material is solidified, removing supernatant from the prepared slurry, pouring the slurry into the mold box, controlling the pouring temperature to be 50 ℃, then, allowing gas to form for 30min, standing and pre-curing for 3h, and preparing a blank;

and thirdly, placing the blank body in an autoclave for autoclave curing, wherein the temperature of the autoclave curing is 190 ℃, vacuumizing to-0.06 MPa, boosting the pressure to 1.5MPa, maintaining the pressure for 8 hours, and reducing the pressure to normal pressure to obtain the concrete block.

Comparative example 1

This comparative example compares to example 1 with glass fibers instead of the multicomponent composite fibers.

Comparative example 2

This comparative example is a commercially available concrete block from a company.

The properties of examples 4 to 6 and comparative examples 1 to 2 were measured, and the results are shown in the following table:

from the table above, it can be seen that the performances of the examples 4-6 are superior to those of the comparative examples 1-2, and the performance indexes meet the requirements of the A.35B06 grade in GB11968-2006 autoclaved aerated concrete block.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.