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CN117819885A - Aerated concrete board and preparation process thereof - Google Patents

Aerated concrete board and preparation process thereof Download PDF

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Publication number
CN117819885A
CN117819885A CN202311831552.2A CN202311831552A CN117819885A CN 117819885 A CN117819885 A CN 117819885A CN 202311831552 A CN202311831552 A CN 202311831552A CN 117819885 A CN117819885 A CN 117819885A
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CN
China
Prior art keywords
parts
toughening
aerated concrete
short fibers
agent
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Pending
Application number
CN202311831552.2A
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Chinese (zh)
Inventor
徐震闻
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Zhejiang Xiangwang Building Energy Saving Technology Co ltd
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Zhejiang Xiangwang Building Energy Saving Technology Co ltd
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Priority to CN202311831552.2A priority Critical patent/CN117819885A/en
Publication of CN117819885A publication Critical patent/CN117819885A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/40—Porous or lightweight materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention relates to an aerated concrete panel and a preparation process thereof. The composition comprises the following components: the concrete slab comprises solid waste materials, cement, lime, a gas generating agent, a water reducing agent, a toughening agent and toughening short fibers, wherein the toughening short fibers are densely distributed on the surface layer of the aerated concrete slab in a net shape. According to the invention, before pouring of the mould, a limit layer formed by the toughened short fibers is attached to the inner surface of the mould in advance, so that after pouring is finished, the toughened short fibers can be fully fused with concrete slurry and are attached to the surface layer of the slab after the concrete slurry is completely solidified into the slab, the toughened short fibers can greatly improve the toughness and strength of the surface layer of the slab, and are beneficial to reducing the damage of corners and edges of the slab in the demoulding and cutting processes and improving the product quality of the aerated concrete slab; the product contains the toughening agent, so that the shearing resistance of the product can be obviously improved.

Description

Aerated concrete plate and preparation process thereof
Technical Field
The invention relates to an aerated concrete product, in particular to an aerated concrete plate and a preparation process thereof.
Background
The aerated concrete plate is a novel wall material, takes calcareous material and siliceous material as main raw materials, and has the advantages of light weight, heat preservation, heat insulation, sound insulation, noise reduction, nailing, sawing, planing, certain shock resistance and the like. However, aerated concrete products have low strength and poor toughness, and are easy to fall off corners due to edge deficiency in the preparation, transportation and use processes, so that the aerated concrete products are only limited to the application of inner partition walls at present.
Disclosure of Invention
The invention provides an aerated concrete panel and a preparation process thereof; solves the problems of easy edge and corner missing and low overall strength in the preparation, transportation and use processes in the prior art. The technical problems of the invention are mainly solved by the following technical proposal: an aerated concrete plate comprises the following components: the concrete slab comprises solid waste materials, cement, lime, a gas generating agent, a water reducing agent, a toughening agent and toughening short fibers, wherein the toughening short fibers are densely distributed on the surface layer of the aerated concrete slab in a net shape.
The invention comprises the following components in percentage by weight: 600-800 parts of solid waste materials, 100-150 parts of cement, 100-150 parts of lime, 5-20 parts of water reducer, 0.4-1.5 parts of gas generator, 2-5 parts of flexibilizer and 0.5-2 parts of toughened short fibers;
wherein the solid waste material comprises tail mud, tail sand, slag and desulfurized gypsum; the air generating agent is aluminum powder; the toughening short fiber is one or a combination of a plurality of plastic steel fibers, polyvinyl alcohol crude fibers and steel fibers.
Further, the length of the toughened short fibers is 4-20mm, the diameter of the toughened short fibers is 0.01-0.05mm, and the distribution density of the toughened short fibers is 20-50 roots per square centimeter.
Further, the toughening agent comprises 10 parts of hot melt adhesive powder, 2 to 10 parts of polysiloxane-polyalkoxy ether copolymer and 2 to 10 parts of silane coupling agent which are mixed according to the weight ratio.
The invention also provides a preparation process of the aerated concrete plate, which comprises the following steps:
s1, wet-grinding the solid waste materials to prepare solid waste slurry;
s2, adding the solid waste slurry, a proper amount of water, the cement, the lime, the toughening agent, the water reducing agent and the gas generating agent into a stirrer according to the mass ratio, and stirring for 3-10 to form concrete slurry;
s3, coating the inner surface of the die with moisture, and spraying the toughened short fibers on the inner surface of the die by using air spraying equipment, wherein the uniformity of the coverage is required to be ensured;
s4, pouring the concrete slurry into a mould;
s5, standing the concrete slurry in a constant temperature environment to generate gas for initial setting, and obtaining a slab after a set time;
s6, demolding, dividing and shaping the plate blank to obtain a semi-finished product blank;
and S7, carrying out constant-temperature autoclaved curing on the semi-finished product blank to obtain the high-performance autoclaved aerated concrete plate.
Therefore, compared with the prior art, the invention has the following characteristics: 1. according to the invention, before pouring of the mould, a limit layer formed by the toughened short fibers is attached to the inner surface of the mould in advance, so that after pouring is finished, the toughened short fibers can be fully fused with concrete slurry and are attached to the surface layer of the slab after the concrete slurry is completely solidified into the slab, the toughened short fibers can greatly improve the toughness and strength of the surface layer of the slab, and are beneficial to reducing the damage of corners and edges of the slab in the demoulding and cutting processes and improving the product quality of the aerated concrete slab; 2. the product contains a toughening agent, the hot melt adhesive powder, polysiloxane-polyalkoxyl ether copolymer and silane coupling agent contained in the toughening agent can increase the adhesion of materials and improve the self-connection strength of the concrete plate, wherein the hot melt adhesive powder can be melted in an autoclaved process and is connected with adjacent hot melt adhesive powder to form a three-dimensional network structure, and the hot melt adhesive powder is re-solidified after being cooled, so that a solid three-dimensional network structure is formed inside the concrete plate, and the shearing resistance of the product can be obviously improved.
Detailed Description
The technical scheme of the invention is further specifically described by the following examples.
Example 1: the aerated concrete plate comprises the following components in parts by weight: 700 parts of solid waste materials, 120 parts of cement, 120 parts of lime, 10 parts of water reducer, 1 part of gas generating agent, 2 parts of toughening agent and 0.5 part of toughening short fiber; wherein the solid waste material is slag powder; the air generating agent is aluminum powder; the toughening short fibers are polyvinyl alcohol crude fibers; the length of the toughened short fiber is 6mm, the diameter of the toughened short fiber is 0.02mm, and the distribution density of the toughened short fiber is 20-50 pieces per square centimeter; the toughening agent comprises 10 parts of hot melt adhesive powder, 5 parts of polysiloxane-polyalkoxy ether copolymer and 5 parts of silane coupling agent which are mixed according to the weight ratio.
Example 2: the aerated concrete plate comprises the following components in parts by weight: 700 parts of solid waste materials, 120 parts of cement, 120 parts of lime, 10 parts of water reducer, 1 part of gas generating agent, 3 parts of toughening agent and 1 part of toughening short fiber; wherein the solid waste material is slag powder; the air generating agent is aluminum powder; the toughening short fibers are polyvinyl alcohol crude fibers; the length of the toughened short fiber is 6mm, the diameter of the toughened short fiber is 0.02mm, and the distribution density of the toughened short fiber is 20-50 pieces per square centimeter; the toughening agent comprises 10 parts of hot melt adhesive powder, 5 parts of polysiloxane-polyalkoxy ether copolymer and 5 parts of silane coupling agent which are mixed according to the weight ratio.
Example 3: the aerated concrete plate comprises the following components in parts by weight: 700 parts of solid waste materials, 120 parts of cement, 120 parts of lime, 10 parts of water reducer, 1 part of gas generating agent, 4 parts of toughening agent and 1.5 parts of toughening short fiber; wherein the solid waste material is slag powder; the air generating agent is aluminum powder; the toughening short fibers are polyvinyl alcohol crude fibers; the length of the toughened short fiber is 6mm, the diameter of the toughened short fiber is 0.02mm, and the distribution density of the toughened short fiber is 20-50 pieces per square centimeter; the toughening agent comprises 10 parts of hot melt adhesive powder, 5 parts of polysiloxane-polyalkoxy ether copolymer and 5 parts of silane coupling agent which are mixed according to the weight ratio.
Example 4: the aerated concrete plate comprises the following components in parts by weight: 700 parts of solid waste materials, 120 parts of cement, 120 parts of lime, 10 parts of water reducer, 1 part of gas generating agent, 5 parts of toughening agent and 2 parts of toughening short fiber; wherein the solid waste material is slag powder; the air generating agent is aluminum powder; the toughening short fibers are polyvinyl alcohol crude fibers; the length of the toughened short fiber is 6mm, the diameter of the toughened short fiber is 0.02mm, and the distribution density of the toughened short fiber is 20-50 pieces per square centimeter; the toughening agent comprises 10 parts of hot melt adhesive powder, 5 parts of polysiloxane-polyalkoxy ether copolymer and 5 parts of silane coupling agent which are mixed according to the weight ratio.
Comparative example: the aerated concrete plate comprises the following components in parts by weight: 700 parts of solid waste materials, 120 parts of cement, 120 parts of lime, 10 parts of water reducer and 1 part of gas generating agent; wherein the solid waste material is slag powder; the air generating agent is aluminum powder.
The four examples and comparative examples produced products of identical form factor. In order to facilitate the comparison of the actual product performances of different embodiments, the following table of two comparison parameters is provided, wherein the first parameter is the number of defective products generated in each hundred aerated concrete plates produced, and the evaluation standard of the defective products is that more than one centimeter of gaps are generated at the corners; the second parameter is to detect the average shearing resistance of the aerated concrete plate, the concrete detection mode is to put the aerated concrete plate on two cushion blocks horizontally, the distance between the two cushion blocks is fixed to be 40 cm, a pressing block is placed in the middle of the upper surface of the aerated concrete plate, then the pressing block is vertically pressed down by a hydraulic press until the plate is broken, the maximum pressure is recorded, the second parameter is the average value of ten samples in order to avoid the occurrence of a special extreme value, and the attention is paid to the fact that the surface toughened short fibers of the detection samples need to be completely ground off so as to avoid the interference of data.
A first table;
as can be seen from the above table, the addition of the toughened short fibers can obviously reduce the number of defective products, and from example 3, the number of defective products is basically kept unchanged, that is, the surface toughness and strength of the product are not basically increased with the increase of the toughened short fibers, so that the weight ratio of the toughened short fibers is set to be about 1.5 parts; the table above also shows that the toughening agent can obviously improve the shearing resistance of the product, but the increasing rate of the shearing resistance and the increasing ratio of the proportion of the toughening agent are not linear, the shearing resistance finally tends to a fixed value, and the increase of the toughening agent can improve the production cost, so that the weight ratio of the toughening agent is set to be about 3 parts.
The embodiment also provides a preparation process of the aerated concrete plate, which comprises the following steps:
s1, wet-grinding the solid waste materials to prepare solid waste slurry;
s2, adding solid waste slurry, proper amount of water, cement, lime, a toughening agent, a water reducing agent and a gas generating agent into a stirrer according to the mass ratio, and stirring for 3-10 to form concrete slurry;
s3, coating the inner surface of the die with moisture, and spraying the toughened short fibers on the inner surface of the die by using air spraying equipment, wherein the uniformity of the coverage is required to be ensured;
s4, pouring the concrete slurry into a mould;
s5, standing the concrete slurry in a constant temperature environment to generate gas for initial setting, and obtaining a slab after a set time;
s6, demolding, dividing and shaping the slab to obtain a semi-finished product blank;
and S7, carrying out constant-temperature autoclaved curing on the semi-finished blank to obtain the high-performance autoclaved aerated concrete plate.
S7, the specific constant-temperature autoclaved curing steps are as follows: a. placing the semi-finished product blank into an autoclave;
b. vacuumizing the autoclave;
c. steam is injected into the autoclave;
d. maintaining the air pressure and temperature conditions in the autoclave;
e. after the set time, controlling steam discharge of the autoclave;
f. and (5) finishing the constant-temperature autoclaved curing of the semi-finished blank.
It will be obvious to those skilled in the art that the present invention may be varied in a number of ways without departing from the scope of the invention. All such modifications as would be obvious to one skilled in the art are intended to be included within the scope of this claims.

Claims (8)

1.一种加气混凝土板材，其特征在于：它包括以下组份：固废材料、水泥、石灰、发气剂、减水剂、增韧剂和增韧短纤维，所述增韧短纤维呈网状密布在所述加气混凝土板材的表层。1. An aerated concrete board, characterized in that it comprises the following components: solid waste materials, cement, lime, gas generating agent, water reducing agent, toughening agent and toughening short fibers, wherein the toughening short fibers are densely distributed on the surface of the aerated concrete board in a mesh shape. 2.根据权利要求1所述的加气混凝土板材，其特征在于：组份按以下重量比配比：固废材料600-800份、水泥100-150份、石灰100-150份、减水剂5-20份、发气剂0.4-1.5份、增韧剂2-5份、增韧短纤维0.5至2份。2. The aerated concrete board according to claim 1 is characterized in that the components are mixed in the following weight ratio: 600-800 parts of solid waste materials, 100-150 parts of cement, 100-150 parts of lime, 5-20 parts of water reducing agent, 0.4-1.5 parts of gas generating agent, 2-5 parts of toughening agent, and 0.5 to 2 parts of toughening short fibers. 3.根据权利要求2所述的加气混凝土板材，其特征在于：所述固废材料包括尾泥、尾砂、炉渣、脱硫石膏中的一种或多种混合。3. The aerated concrete board according to claim 2, characterized in that the solid waste material comprises a mixture of one or more of tailings mud, tailings sand, slag and desulfurized gypsum. 4.根据权利要求2所述的加气混凝土板材，其特征在于：所述发气剂为铝粉。4. The aerated concrete board according to claim 2, characterized in that the gas generating agent is aluminum powder. 5.根据权利要求2所述的加气混凝土板材，其特征在于：所述增韧短纤维为塑钢纤维、聚乙烯醇粗纤维、钢纤维中的一种或多种组合。5. The aerated concrete board according to claim 2, characterized in that the toughening short fibers are one or a combination of plastic steel fibers, polyvinyl alcohol coarse fibers, and steel fibers. 6.根据权利要求5所述的加气混凝土板材，其特征在于：所述增韧短纤维的长度为4-20mm，其直径为0.01-0.05mm，其分布的密度为20至50根每平方厘米。6. The aerated concrete board according to claim 5, characterized in that the length of the toughening short fibers is 4-20 mm, the diameter is 0.01-0.05 mm, and the distribution density is 20 to 50 fibers per square centimeter. 7.根据权利要求2所述的加气混凝土板材，其特征在于：所述增韧剂包括按重量比混合的10份热熔胶粉、2至10份聚硅氧烷-多烷氧基醚共聚物、2至10份硅烷偶联剂。7. The aerated concrete board according to claim 2, characterized in that the toughening agent comprises 10 parts of hot melt adhesive powder, 2 to 10 parts of polysiloxane-polyalkoxy ether copolymer, and 2 to 10 parts of silane coupling agent mixed in weight ratio. 8.一种加气混凝土板材的制备工艺，包括以下步骤：8. A process for preparing an aerated concrete board, comprising the following steps: S1，将上述固废材料湿磨制浆，制得固废浆料；S1, wet-grinding the solid waste material to prepare solid waste slurry; S2，按上述质量比向搅拌机内加入所述固废浆料、适量水、所述水泥、所述石灰、所述增韧剂、所述减水剂和所述发气剂，搅拌3-10分形成混凝土料浆；S2, adding the solid waste slurry, an appropriate amount of water, the cement, the lime, the toughening agent, the water reducing agent and the gas generating agent into a mixer according to the above mass ratio, and stirring for 3-10 minutes to form a concrete slurry; S3，将模具的内表面涂湿，并利用喷气设备将增韧短纤维喷覆在模具的内表面上，需保证覆盖的均匀性；S3, wet the inner surface of the mold, and use a jet device to spray the toughened short fibers on the inner surface of the mold, ensuring uniform coverage; S4，将上述混凝土料浆浇筑至模具中；S4, pouring the concrete slurry into a mold; S5，使所述混凝土料浆在恒温环境下静置发气初凝，设定时间后得到板坯；S5, allowing the concrete slurry to stand in a constant temperature environment to gasify and initially set, and obtaining a slab after a set time; S6，将所述板坯脱模并分割、整形，得到半成品坯体；S6, demoulding, dividing and shaping the slab to obtain a semi-finished product body; S7，对所述半成品坯体进行恒温蒸压养护，得到所述高性能蒸压加气混凝土板材。S7, performing constant temperature autoclaving and curing on the semi-finished green body to obtain the high-performance autoclaved aerated concrete board.
CN202311831552.2A 2023-12-28 2023-12-28 Aerated concrete board and preparation process thereof Pending CN117819885A (en)

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CN202311831552.2A CN117819885A (en) 2023-12-28 2023-12-28 Aerated concrete board and preparation process thereof

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN120398504A (en) * 2025-03-19 2025-08-01 武汉建筑材料工业设计研究院有限公司 Aerated concrete products based on high methylene blue value tailings and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109113259A (en) * 2018-08-23 2019-01-01 都清 A kind of three-dimensional network composite plate structure
CN115385645A (en) * 2022-09-19 2022-11-25 安徽省高迪循环经济产业园股份有限公司 High-performance autoclaved aerated concrete plate, preparation method thereof and building
CN116901243A (en) * 2023-07-19 2023-10-20 中南大学 Concrete toughness bionic cortex, in-situ growth method and application thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109113259A (en) * 2018-08-23 2019-01-01 都清 A kind of three-dimensional network composite plate structure
CN115385645A (en) * 2022-09-19 2022-11-25 安徽省高迪循环经济产业园股份有限公司 High-performance autoclaved aerated concrete plate, preparation method thereof and building
CN116901243A (en) * 2023-07-19 2023-10-20 中南大学 Concrete toughness bionic cortex, in-situ growth method and application thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN120398504A (en) * 2025-03-19 2025-08-01 武汉建筑材料工业设计研究院有限公司 Aerated concrete products based on high methylene blue value tailings and preparation method thereof

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