CN114538870A - Modified autoclaved aerated concrete double-hole self-insulation building block and preparation method thereof - Google Patents

Modified autoclaved aerated concrete double-hole self-insulation building block and preparation method thereof Download PDF

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Publication number
CN114538870A
CN114538870A CN202210267160.7A CN202210267160A CN114538870A CN 114538870 A CN114538870 A CN 114538870A CN 202210267160 A CN202210267160 A CN 202210267160A CN 114538870 A CN114538870 A CN 114538870A
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building block
parts
modified
mixture
aerated concrete
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张福华
张耀文
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Shandong Yingdi New Material Technology Co ltd
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Shandong Yingdi New Material Technology Co ltd
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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
    • C04B28/12—Hydraulic lime
    • 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
    • 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
    • C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
    • 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
    • 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 relates to the field of insulating bricks, in particular to a modified autoclaved aerated concrete double-hole self-insulating building block and a preparation method thereof. The building block comprises the following raw materials in parts by weight: 67-72 parts of a siliceous material; 24-29 parts of calcareous material; 0.08 part of aluminum powder; 3-5 parts of gypsum; 0.92 part of additive. The preparation method of the building block comprises the following steps: uniformly mixing the siliceous material, the gypsum and the additive according to the weight proportion to prepare a mixture; adding water into the mixture to ensure that the diffusivity of the mixture reaches 25-30 cm; pouring the mixture into a stirrer, keeping the temperature at 38-40 ℃, adding a calcareous material, stirring for one minute, adding aluminum powder, and continuing stirring for 15 minutes; injecting the finally stirred mixture into a mold for gas generation to harden the mixture into a green body; and demolding and cutting the blank. The modified autoclaved aerated concrete double-hole self-insulation building block disclosed by the invention is high in strength, low in heat conductivity coefficient and good in heat insulation effect.

Description

Modified autoclaved aerated concrete double-hole self-insulation building block and preparation method thereof
Technical Field
The invention relates to the field of insulating bricks, in particular to a modified autoclaved aerated concrete double-hole self-insulating building block and a preparation method thereof.
Background
At present, the outer wall of a building mostly needs to be subjected to heat preservation treatment, and the heat preservation effect is achieved mainly by building heat preservation building blocks on the outer wall. The composite building blocks combined by polystyrene boards and concrete are mostly used in the market at present, the building mortar joints of the composite building blocks are large, heat bridges generated by the mortar joints cannot be solved, water is easy to permeate indoors in rainy days, the building block breakage rate is high, the construction process is complex, and the heat preservation effect is poor.
Disclosure of Invention
The invention aims to provide a modified autoclaved aerated concrete double-hole self-insulation building block with high strength and good heat insulation effect.
In order to achieve the purpose, the invention discloses a modified autoclaved aerated concrete double-hole self-insulation building block which is prepared from the following raw materials:
67-72 parts of siliceous material, wherein the siliceous material consists of any one of quartz sand, ceramic mud, slag, fly ash and marble mud and nano silicon powder, the nano silicon powder accounts for 15-25 parts, and the nano carbon powder can improve the strength of the building block;
24-29 parts of a calcareous material, wherein the calcareous material consists of 6-14 parts of cement and 10-23 parts of lime;
0.08 part of aluminum powder;
3-5 parts of gypsum.
Preferably, the raw materials also comprise 0.92 part of additive, and the additive consists of 0.06-0.09 part of wood fiber, 0.01-0.013 part of defoaming agent, 0.35-0.42 part of water glass and 0.4-0.5 part of hydroxy acid. The wood fiber can improve the strength of the building block; the defoaming agent can make bubbles more uniform; the water glass can increase the initial strength of the building block and stabilize the pouring process; the hydroxy acid can increase the strength of the building block and make the air holes uniform.
Preferably, the particle size of the siliceous material is more than or equal to 800 meshes. The siliceous material is ball-milled to the fineness of more than or equal to 800 meshes, so that the air holes after gas generation have thin walls and more air holes.
Preferably, the aluminum powder includes three particles having different particle sizes.
Preferably, the fineness of three particles with different particle sizes of the aluminum powder is 260 meshes, 320 meshes and 370 meshes respectively.
The preparation method of the modified autoclaved aerated concrete double-hole self-insulation building block comprises the following steps:
(1) mixing 67-72 parts of siliceous material, 3-5 parts of gypsum and 0.92 part of additive uniformly according to the weight ratio to prepare a mixture;
(2) adding water into the mixture to ensure that the diffusivity of the mixture reaches 25-30 cm;
(3) pouring the mixture into a stirrer, keeping the temperature between 38 and 40 ℃, adding 24 to 29 parts of calcareous material, stirring for one minute, adding 0.08 part of aluminum powder, and continuing stirring for 15 minutes;
(4) injecting the finally stirred mixture into a die for gassing to harden the mixture into a green body;
(5) and demolding and cutting the blank.
The modified autoclaved aerated concrete double-hole self-insulation building block prepared according to the preparation method has the dry density of less than or equal to 500kg/m measured according to the GB11969-2006 test method3(ii) a The strength is more than or equal to 3.5 Mpa; the thermal conductivity coefficient is less than or equal to 0.1W/(m.k).
The modified autoclaved aerated concrete double-hole self-insulation building block prepared by the preparation method comprises a plurality of first bubbles, second bubbles and third bubbles which are connected with one another, wherein the second bubbles comprise at least one third bubble, the first bubbles comprise at least one second bubble, or the first bubbles comprise at least one second bubble and at least one third bubble outside the second bubble. The three layers of bubbles are sleeved together, third bubbles are filled between the second bubbles, and the second bubbles and the third bubbles are filled between the first bubbles, so that the strength of the building block is high, the heat conductivity coefficient of the building block is greatly reduced, and the heat insulation effect of the building block is enhanced.
Preferably, the building block is of a cuboid structure, and two square blind holes which are parallel to each other in the front and back are formed in one end face of the building block. After the wall body is built by the building block, two layers of air layers which do not flow are formed in the wall body by the two blind holes, so that the wall body is more heat-insulating.
Preferably, the building block is 600mm long, 330mm wide and 300mm high, two blind holes formed in one end face are 60mm wide, 200mm high and 550mm long, the shortest distance between the two blind holes is 70mm, the distances from the upper top face and the lower bottom face of each blind hole to the upper top face and the lower bottom face of the building block are 50mm, and the distance from the front side face of the blind hole located on the front side to the front side face of the building block is 70 mm.
In conclusion, the beneficial effects of the invention are as follows: the modified autoclaved aerated concrete double-hole self-insulation building block disclosed by the invention is high in strength, low in heat conductivity coefficient, large in wall thermal resistance and good in heat insulation effect. The three layers of bubbles are sleeved together, the third bubbles are filled between the second bubbles, and the second bubbles and the third bubbles are filled between the first bubbles, so that the building block is high in strength and low in heat conductivity coefficient, and the heat preservation effect of the building block is improved. After the wall body is built by the building block, two layers of air layers which do not flow are formed in the wall body by the two blind holes, so that the thermal resistance of the wall body is increased, and the wall body is more heat-insulating.
Drawings
FIG. 1 is a first form of first air bubbles of a modified autoclaved aerated concrete double-hole self-insulation building block related to the invention;
FIG. 2 is a second form of first bubbles of the modified autoclaved aerated concrete double-hole self-insulation building block, which is disclosed by the invention;
FIG. 3 is a third form of first bubbles of the modified autoclaved aerated concrete double-hole self-insulation building block, which is disclosed by the invention;
FIG. 4 shows a fourth form of the first bubbles of the modified autoclaved aerated concrete dual-hole self-insulation block according to the present invention;
FIG. 5 is an internal structural form of the modified autoclaved aerated concrete double-hole self-insulation building block related to the invention;
FIG. 6 is a schematic view of the appearance structure of a modified autoclaved aerated concrete double-hole self-insulation building block related to the invention;
FIG. 7 is a left side view of FIG. 6;
FIG. 8 is a schematic structural diagram of a wall built by using the modified autoclaved aerated concrete double-hole self-insulation building block related to the invention;
in the figure: 1. a first bubble, 2, a second bubble, 3, a third bubble.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, "a plurality" means two or more unless otherwise specified.
The detailed description refers to the examples, but is not limited to the examples:
the first embodiment:
the modified autoclaved aerated concrete double-hole self-insulation building block provided by the embodiment comprises the following raw materials in parts by weight: 67 parts of siliceous material, wherein the siliceous material consists of nano silicon powder and any one of quartz sand, ceramic mud, slag, fly ash and marble mud, the nano silicon powder accounts for 15-25 parts, and the particle size of the siliceous material is ball-milled to be more than or equal to 800 meshes;
27 parts of calcareous material, wherein the calcareous material consists of 10 parts of cement and 17 parts of lime;
0.08 part of aluminum powder, wherein the aluminum powder comprises three particles with different particle sizes, and the fineness of the three particles is 260 meshes, 320 meshes and 370 meshes respectively;
5 parts of gypsum;
0.92 part of additive: the additive consists of 0.06-0.09 part of wood fiber, 0.01-0.013 part of defoamer, 0.35-0.42 part of water glass and 0.4-0.5 part of hydroxy acid.
The preparation method comprises the following steps:
(1) 67 parts of siliceous material, 5 parts of gypsum and 0.92 part of additive are uniformly mixed to prepare a mixture;
(2) adding water into the mixture to ensure that the diffusivity of the mixture reaches 27 cm;
(3) pouring the mixture into a stirrer, keeping the temperature at 38-40 ℃, adding 27 parts of calcareous material, stirring for one minute, adding 0.08 part of aluminum powder, and continuing stirring for 15 minutes;
(4) injecting the finally stirred mixture into a mold for gas generation to harden the mixture into a green body;
(5) and demolding and cutting the blank.
The modified autoclaved aerated concrete double-hole self-insulation building block has the following measured results according to the detection method of GB 11969-2006:
the dry density was 490kg/m3；
The strength is 3.9 Mpa;
the thermal conductivity was 0.098W/(m.k).
Second embodiment:
the modified autoclaved aerated concrete double-hole self-insulation building block provided by the embodiment comprises the following raw materials in parts by weight: 69 parts of siliceous material, wherein the siliceous material consists of nano silicon powder and any one of quartz sand, ceramic mud, slag, fly ash and marble mud, the nano silicon powder accounts for 15-25 parts, and the particle size of the siliceous material is ball-milled to be more than or equal to 800 meshes;
27 parts of calcareous material, wherein the calcareous material consists of cement and lime, and 9 parts of cement and 18 parts of lime;
0.08 part of aluminum powder, wherein the aluminum powder comprises three particles with different particle sizes, and the fineness of the three particles is 260 meshes, 320 meshes and 370 meshes respectively;
3 parts of gypsum;
0.92 part of additive: the additive consists of 0.06-0.09 part of wood fiber, 0.01-0.013 part of defoamer, 0.35-0.42 part of water glass and 0.4-0.5 part of hydroxy acid.
The preparation method comprises the following steps:
(1) uniformly mixing 69 parts of siliceous material, 3 parts of gypsum and 0.92 part of additive to prepare a mixture;
(2) adding water into the mixture to ensure that the diffusivity of the mixture reaches 28 cm;
(3) pouring the mixture into a stirrer, keeping the temperature at 38-40 ℃, adding 27 parts of calcareous material, stirring for one minute, adding 0.08 part of aluminum powder, and continuing stirring for 15 minutes;
(4) injecting the finally stirred mixture into a mold for gas generation to harden the mixture into a green body;
(5) and demolding and cutting the blank.
The modified autoclaved aerated concrete double-hole self-insulation building block has the following measured results according to the detection method of GB 11969-2006:
the dry density is 492kg/m3；
The strength is 4.2 Mpa;
the thermal conductivity was 0.096W/(m.k).
The third embodiment:
the modified autoclaved aerated concrete double-hole self-insulation building block provided by the embodiment comprises the following raw materials in parts by weight: 70 parts of siliceous material, wherein the siliceous material consists of nano silicon powder and any one of quartz sand, ceramic mud, slag, fly ash and marble mud, the nano silicon powder accounts for 15-25 parts, and the particle size of the siliceous material is ball-milled to be more than or equal to 800 meshes;
25 parts of calcareous material, wherein the calcareous material consists of 13 parts of cement and 12 parts of lime;
0.08 part of aluminum powder, wherein the aluminum powder comprises three particles with different particle sizes, and the fineness of the three particles is 260 meshes, 320 meshes and 370 meshes respectively;
4 parts of gypsum;
0.92 part of additive: the additive consists of 0.06-0.09 part of wood fiber, 0.01-0.013 part of defoamer, 0.35-0.42 part of water glass and 0.4-0.5 part of hydroxy acid.
The preparation method comprises the following steps:
(1) uniformly mixing 70 parts of siliceous material, 4 parts of gypsum and 0.92 part of additive to prepare a mixture;
(2) adding water into the mixture to ensure that the diffusivity of the mixture reaches 29 cm;
(3) pouring the mixture into a stirrer, keeping the temperature at 38-40 ℃, adding 25 parts of calcareous material, stirring for one minute, adding 0.08 part of aluminum powder, and continuing stirring for 15 minutes;
(4) injecting the finally stirred mixture into a mold for gas generation to harden the mixture into a green body;
(5) and demolding and cutting the blank.
The modified autoclaved aerated concrete double-hole self-insulation building block has the following measured results according to the detection method of GB 11969-2006:
the dry density was 498kg/m3；
The strength is 4.8 Mpa;
the thermal conductivity was 0.097W/(m.k).
The fourth embodiment:
the modified autoclaved aerated concrete double-hole self-insulation building block provided by the embodiment comprises the following raw materials in parts by weight: 71 parts of siliceous material, wherein the siliceous material consists of nano silicon powder and any one of quartz sand, ceramic mud, slag, fly ash and marble mud, the nano silicon powder accounts for 15-25 parts, and the particle size of the siliceous material is ball-milled to be more than or equal to 800 meshes;
24 parts of calcareous material, wherein the calcareous material consists of cement and lime, and the cement accounts for 14 parts and the lime accounts for 10 parts;
0.08 part of aluminum powder, wherein the aluminum powder comprises three particles with different particle sizes, and the fineness of the three particles is 260 meshes, 320 meshes and 370 meshes respectively;
5 parts of gypsum;
0.92 part of additive: the additive consists of 0.06-0.09 part of wood fiber, 0.01-0.013 part of defoamer, 0.35-0.42 part of water glass and 0.4-0.5 part of hydroxy acid.
The preparation method comprises the following steps:
(1) uniformly mixing 71 parts of siliceous material, 5 parts of gypsum and 0.92 part of additive to prepare a mixture;
(2) adding water into the mixture to ensure that the diffusivity of the mixture reaches 28 cm;
(3) pouring the mixture into a stirrer, keeping the temperature at 38-40 ℃, adding 24 parts of calcareous material, stirring for one minute, adding 0.08 part of aluminum powder, and continuing stirring for 15 minutes;
(4) injecting the finally stirred mixture into a mold for gas generation to harden the mixture into a green body;
(5) and demolding and cutting the blank.
The modified autoclaved aerated concrete double-hole self-insulation building block is measured according to the detection method of GB11969-2006, and the result is as follows:
the dry density is 495kg/m3；
The strength is 4.2 Mpa;
the thermal conductivity was 0.095W/(m.k).
Fifth embodiment:
the modified autoclaved aerated concrete double-hole self-insulation building block provided by the embodiment comprises the following raw materials in parts by weight: 72 parts of siliceous material, wherein the siliceous material consists of nano silicon powder and any one of quartz sand, ceramic mud, slag, fly ash and marble mud, the nano silicon powder accounts for 15-25 parts, and the particle size of the siliceous material is ball-milled to be more than or equal to 800 meshes;
24 parts of calcareous material, wherein the calcareous material consists of 8 parts of cement and 16 parts of lime;
0.08 part of aluminum powder, wherein the aluminum powder comprises three particles with different particle sizes, and the fineness of the three particles is 260 meshes, 320 meshes and 370 meshes respectively;
3 parts of gypsum;
0.92 part of additive: the additive consists of 0.06-0.09 part of wood fiber, 0.01-0.013 part of defoamer, 0.35-0.42 part of water glass and 0.4-0.5 part of hydroxy acid.
The preparation method comprises the following steps:
(1) uniformly mixing 72 parts of siliceous material, 3 parts of gypsum and 0.92 part of additive to prepare a mixture;
(2) adding water into the mixture to ensure that the diffusivity of the mixture reaches 27 cm;
(3) pouring the mixture into a stirrer, keeping the temperature at 38-40 ℃, adding 24 parts of calcareous material, stirring for one minute, adding 0.08 part of aluminum powder, and continuing stirring for 15 minutes;
(4) injecting the finally stirred mixture into a mold for gas generation to harden the mixture into a green body;
(5) and demolding and cutting the blank.
The modified autoclaved aerated concrete double-hole self-insulation building block has the following measured results according to the detection method of GB 11969-2006:
the dry density is 491kg/m3；
The strength is 3.8 Mpa;
the thermal conductivity was 0.097W/(m.k).
In conclusion, the dry density of the modified autoclaved aerated concrete double-hole self-insulation building block disclosed by the invention is less than or equal to 500kg/m when measured according to the GB11969-2006 test method3(ii) a The strength is more than or equal to 3.5 Mpa; the thermal conductivity coefficient is less than or equal to 0.1W/(m.k).
The internal structure of the modified autoclaved aerated concrete double-hole self-insulation building block in the five embodiments is shown in fig. 5 and consists of a plurality of first air bubbles 1, second air bubbles 2 and third air bubbles 3 which are connected with one another. As shown in fig. 1-4, the second bubble 2 includes at least one third bubble 3 therein, the first bubble 1 includes at least one second bubble 2 therein, or the first bubble 1 includes at least one second bubble 2 therein and at least one third bubble 3 outside the second bubble 2 therein. Specifically, the first bubble 1 shown in fig. 1 may include a second bubble 2 therein, and the second bubble 2 includes a third bubble 3 therein; or as shown in fig. 2, the first bubble 1 includes one second bubble 2, and the second bubble 2 includes a plurality of third bubbles 3; it is also possible that the first air bubble 1 shown in fig. 3 includes a plurality of second air bubbles 2, the second air bubble 2 includes one third air bubble 3, and a plurality of third air bubbles 3 are filled between the second air bubbles 2; as shown in fig. 4, the first air bubbles 1 include a plurality of second air bubbles 2, the second air bubbles 2 include a plurality of third air bubbles 3, and the plurality of third air bubbles 3 are filled between the plurality of second air bubbles 2; of course, other combinations are possible in the first bubble 1. The three layers of bubbles are sleeved together, third bubbles are filled between the second bubbles, and the second bubbles and the third bubbles are filled between the first bubbles, so that the strength of the building block is high, the heat conductivity coefficient of the building block is greatly reduced, and the heat insulation effect of the building block is enhanced.
As shown in fig. 6 and 7, the modified autoclaved aerated concrete double-hole self-insulation building block according to the invention has a cuboid structure, and two square blind holes which are parallel to each other in the front and back are formed in one end surface. Specifically, the length of the block is 600mm, the width is 330mm, and the height is 300mm, the sizes of two square blind holes formed on one end face (the face formed by the width and the height) are 60mm, 200mm and 550mm respectively, the shortest distance between the two blind holes is 70mm, the distances from the upper top face and the lower bottom face of each blind hole to the upper top face and the lower bottom face of the block are 50mm respectively, and the distance from the front side face of the blind hole positioned on the front side to the front side face of the block is 70mm ("upper" corresponds to the upper side of fig. 6 and 7, and "front" corresponds to the left side of fig. 6). After the wall body shown in the figure 8 is built by using the building block, two layers of air layers which do not flow are formed in the wall body by the two blind holes, so that the wall body is more heat-insulating.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims (9)

1. The modified autoclaved aerated concrete double-hole self-insulation building block is characterized by comprising the following raw materials in parts by weight:
67-72 parts of siliceous material, wherein the siliceous material consists of any one of quartz sand, ceramic mud, slag, fly ash and marble mud and nano silicon powder, and the nano silicon powder accounts for 15-25 parts;
24-29 parts of a calcareous material, wherein the calcareous material consists of 6-14 parts of cement and 10-23 parts of lime;
0.08 part of aluminum powder;
3-5 parts of gypsum.
2. The modified autoclaved aerated concrete double-hole self-insulation building block as claimed in claim 1, wherein the raw materials further comprise 0.92 parts of additives, and the additives comprise 0.06-0.09 parts of wood fibers, 0.01-0.013 parts of antifoaming agents, 0.35-0.42 parts of water glass, and 0.4-0.5 parts of hydroxy acids.
3. The modified autoclaved aerated concrete double-hole self-insulation building block as claimed in claim 1, wherein the particle size of the siliceous material is not less than 800 meshes.
4. The modified autoclaved aerated concrete double-hole self-insulation building block as claimed in claim 1, wherein the aluminum powder comprises three particles with different particle sizes.
5. The modified autoclaved aerated concrete double-hole self-insulation building block as claimed in claim 4, wherein the fineness of the three different particle sizes of the aluminum powder is 260 meshes, 320 meshes and 370 meshes respectively.
6. The preparation method of the modified autoclaved aerated concrete double-hole self-insulation building block as claimed in claim 2, is characterized by comprising the following steps:
(1) mixing 67-72 parts of siliceous material, 3-5 parts of gypsum and 0.92 part of additive uniformly according to the weight ratio to prepare a mixture;
(2) adding water into the mixture to ensure that the diffusivity of the mixture reaches 25-30 cm;
(3) pouring the mixture into a stirrer, keeping the temperature at 38-40 ℃, adding 24-29 parts of calcareous material, stirring for one minute, adding 0.08 part of aluminum powder, and continuing stirring for 15 minutes;
(4) injecting the finally stirred mixture into a mold for gas generation to harden the mixture into a green body;
(5) and demolding and cutting the blank.
7. The modified autoclaved aerated concrete double-hole self-insulation building block prepared by the preparation method according to claim 6 is characterized in that the building block is composed of a plurality of first air bubbles (1), second air bubbles (2) and third air bubbles (3) which are connected with each other, at least one third air bubble (3) is contained in each second air bubble (2), at least one second air bubble (2) is contained in each first air bubble (1), or at least one second air bubble (2) and at least one third air bubble (3) which is positioned outside each second air bubble (2) are contained in each first air bubble (1).
8. The modified autoclaved aerated concrete double-hole self-insulation building block as claimed in claim 1, wherein the building block has a cuboid structure, and two square blind holes which are parallel to each other are formed in the front and the back of one end face of the building block.
9. The modified autoclaved aerated concrete double-hole self-insulation building block as claimed in claim 8, wherein the length of the building block is 600mm, the width is 330mm, and the height is 300mm, the two blind holes formed in one end face are 60mm, 200mm and 550mm in width, the shortest distance between the two blind holes is 70mm, the distances from the upper top surface and the lower bottom surface of each blind hole to the upper top surface and the lower bottom surface of the building block are 50mm, and the distance from the front side face of the blind hole positioned on the front side to the front side face of the building block is 70 m.
CN202210267160.7A 2022-03-18 2022-03-18 Modified autoclaved aerated concrete double-hole self-insulation building block and preparation method thereof Pending CN114538870A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101182173A (en) * 2007-11-30 2008-05-21 东南大学 Key technology scheme according to improvement for insulation and material mechanics performance of aerated concrete
CN201883596U (en) * 2010-11-11 2011-06-29 广西工学院 Highly efficient energy-saving multi-row-hole autoclaved aerated concrete block
CN104088393A (en) * 2013-04-23 2014-10-08 山东省建筑科学研究院 Autoclaved aerated concrete building block

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101182173A (en) * 2007-11-30 2008-05-21 东南大学 Key technology scheme according to improvement for insulation and material mechanics performance of aerated concrete
CN201883596U (en) * 2010-11-11 2011-06-29 广西工学院 Highly efficient energy-saving multi-row-hole autoclaved aerated concrete block
CN104088393A (en) * 2013-04-23 2014-10-08 山东省建筑科学研究院 Autoclaved aerated concrete building block

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