CN102464497B - Waste brick tile/straw foam concrete and preparation method thereof - Google Patents

Waste brick tile/straw foam concrete and preparation method thereof Download PDF

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Publication number
CN102464497B
CN102464497B CN 201010536160 CN201010536160A CN102464497B CN 102464497 B CN102464497 B CN 102464497B CN 201010536160 CN201010536160 CN 201010536160 CN 201010536160 A CN201010536160 A CN 201010536160A CN 102464497 B CN102464497 B CN 102464497B
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tile
straw
useless brick
weight parts
particle
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CN 201010536160
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CN102464497A (en
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张长森
刘学军
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盐城工学院
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Abstract

The invention which provides waste brick tile/straw foam concrete and a preparation method thereof relates to a lightweight building material. The foam concrete is a porous material obtained by mixing more than 90% of a main material comprising industrial and agricultural wastes of waste brick tiles, slag, straws and the like, an additive, a foaming agent and water according to a ratio, stirring, cast-molding and maintaining. The foam concrete which has the functions of light weight, low heat conduction coefficient, heat insulation, sound insulation and fire resistance, water resistance, freezing resistance, cracking resistance, shock resistance and the like and has the advantages of low production cost, simple manufacturing process, realization of onsite casting of prefabricated products, use convenience and safety, changing of wastes into valuables, reaching of energy-saving low-carbon effects, reduction of pollution of the wastes to the environment, ecological environment protection, and nation and civilian benefiting, contributes to the creation of the saving and low carbon society in China.

Description

A kind of useless brick tile/straw foam concrete and preparation method thereof
Technical field
The present invention relates to a kind of light building material, particularly a kind of useless brick tile/straw foam concrete and preparation method thereof.Walls and roofs applicable to building.
Background technology
Since China's reform and opening-up, national economy obtains rapid growth, has become the main flow of the present industrial development of China with " scientific and technical innovation, autonomous innovation ".China's industry is just progressively to the future development of saving type, energy-saving and emission-reduction, low-carbon (LC).Enforcement along with the policy of the reform of China materials for wall and building energy conservation, require to use the performance novel building energy-saving material such as have energy-conservation, insulation, lightweight, fire-resistant, profit is useless in modern architecture, and that foamed concrete has embodied just is energy-conservation, a kind of multifunctional material of insulation, heat insulation, lightweight, the performance such as fire-resistant, and foamed concrete is just being brought into play more and more important effect in building energy saving field.In recent years, all pay much attention to the research and development of foamed concrete both at home and abroad, existing foamed concrete, as: publication number 101139194A " preparation method of foaming concrete lightweight wall material ", disclosed component be Portland cement, medium sand (or flyash, or industrial cinder all can), whipping agent; Notification number CN100564305C " coal gangue-fly ash foam concrete " patent, disclosed component is: coal gangue, flyash, cement, lime, gypsum, filler and whipping agent form; Publication number is CN1261600A's " non-steam cured foamed concrete plate " patent, and disclosed component is: inorganic coagulation material low alkali cement, flyash, fiber, whipping agent, and the processing method of walling is made sheet material routinely; Publication number CN101565289A " tailings foamed concrete ", disclosed component is: cement, tailings and whipping agent.Mainly there is following deficiency in existing foamed concrete: (1) consumption of natural resource is many, a large amount of natural resourcess that silicate cement or oxychloride cement, sand, stone flour etc. consume; (2) cost is higher, and preparation foamed concrete gelling material used is general purpose portland cement or magnesia oxychloride cement, and its price is also higher; (3) thermal conductivity is higher, general 300~500kg/m 3The thermal conductivity of foamed concrete at 0.08~0.186w/ (mK), heat-proof quality is relatively poor; (4) intensity of foamed concrete is not high, 300~500kg/m 3Foamed concrete be difficult to reach the required requirement of strength of energy-saving building materials.Therefore, how to seek to utilize in a large number the waste of industrial or agricultural to substitute natural resources, utilize especially rice wheat straw as main raw, reduce the foamed concrete cost, and the thermal conductivity that how to reduce foamed concrete, the intensity of raising foamed concrete becomes current urgent problem.For addressing this problem, R﹠D institution and enterprise technology personnel utilize modern science and technology in constantly research, exploration, although obtained technically some progress, still exist the technical barrier that not yet overcomes in practice.
Summary of the invention
The object of the invention is to overcome above deficiency, a kind of useless brick tile/straw foam concrete and preparation method thereof is provided, with agriculture and industry wastes such as useless brick and tile, slag and straw cash as main raw, be mixed in proportion a kind of porous material that forms through stirring, casting, maintenance with admixture, whipping agent and water.
the technical solution adopted for the present invention to solve the technical problems is: contain useless brick and tile powder, ground granulated blast furnace slag, straw, useless brick and tile particle, admixture, whipping agent, water, wherein admixture is ceramic (unslaked lime, white lime, sodium aluminate, water glass, sodium sulfate, S-WAT or desulfurated plaster) and organic materials (methylcellulose gum, polyvinyl alcohol, silane coupling agent, latex powder) one or two or more kinds composition, the proportioning of each raw material is: useless brick and tile powder 40~60 weight parts, ground granulated blast furnace slag is 20~40 weight parts, useless brick and tile particle 5~20 weight parts, straw 3~10 weight parts, admixture 5.0~20 weight parts, whipping agent 0.3~2.0 weight part.
The technological process of production:
A kind of useless brick tile/straw foam concrete and preparation method thereof comprises the steps:
1, sub-electing useless brick and tile from building waste, with the useless brick and tile of crusher in crushing bulk, is then the screening choosing of 4.8mm and 1.2mm with sieve aperture, and the material of the particle of 4.8~1.2mm gathers materials as foamed concrete; Turn back to greater than the particle of 4.8mm again and carry out fragmentation in crusher, carry out grinding less than the useless brick and tile particle feeding ball mill of 1.2mm, the control fineness is 360~400m 2/ kg;
2, ground granulated blast furnace slag is specific surface area 450~500m 2/ kg;
3, straw is crushed to straw fiber below length 2cm with pulverizer, then uses 1~2% NaOH solution soaking 6~12 hours, filtration drying;
4, with each material in step 1~3 and admixture in a ratio mixing and stirring, add suitable quantity of water to stir into slurry;
5, whipping agent is 0.2 ratio with the quality ratio, adds in foaming machine, makes foam;
After the foams mix of the slurry that 6, step 4 is made and step 5 system stirs, casting.Made a kind of useless brick tile/straw foam concrete material.
The know-why that the present invention adopts is: this foamed concrete main raw is that the agriculture and industry wastes such as useless brick and tile, slag and straw cash account for more than 90%, be mixed in proportion a kind of porous material that forms through stirring, casting, maintenance with admixture, whipping agent and water.Whipping agent is can make material internal produce foam and the material that forms closed pore or connection pore structure material, and admixture is one or more above compositions of ceramic and organic materials.It is that the following straw fiber of 2cm is material that this foamed concrete adopts length, and vegetable fibre has the function of heat insulating, noise reducing and increase folding strength; Owing to containing relatively independent CAB and good globality in this foamed concrete, make this foamed concrete have good thermal and insulating performance and water resistance, the thermal conductivity that its thermal conductivity reaches less than the existing national standard requirement of each density building block; This foamed concrete material of main part is ceramic, can not burn, and therefore have good fire performance, but cast-in-site does not need the particular manufacturing craft less investment, and construction is fast, and is good with the base material associativity; This foamed concrete adds the material conduct of the particle of 4.8~1.2mm to gather materials, improved the intensity of this foamed concrete, therefore the foamed concrete of different densities has different intensity and thermal conductivity, can be used for the buildings non-bearing wall body (〉=5.0MPa), the roof heat insulation load larrying member (〉=2.5MPa), non bearing structure (〉=1.5MPa) and wallboard (〉=0.4MPa).The steam press maintenance operation has been saved in this foamed concrete and gas concrete contrast, more is conducive to save energy, realizes the resource recycling utilization of solid waste; This foamed concrete is the useless light material of a kind of profit simultaneously, has expanded the discarded use approach of industrial or agricultural, has both reduced cost, has saved again natural resource, meets the strategy of energy-saving and emission-reduction and Sustainable development.
The invention has the beneficial effects as follows: the function such as this foamed concrete has that lightweight, thermal conductivity are low, heat insulating, sound-proof refractory, waterproof, freeze proof, cracking resistance, antidetonation, and production cost is low, manufacturing process is simple, all right cast-in-site prefabricated product, easy to use, safe, turn waste into wealth, reach the energy-saving low-carbon effect.Reduced simultaneously the waste pollution on the environment, preserved the ecological environment, benefited the nation and the people, contributed for China creates saving type, low-carbon (LC) society.
Description of drawings
The present invention is further described below in conjunction with embodiment:
It is the process flow sheet of a kind of useless brick tile/straw foam concrete and preparation method thereof in figure
Embodiment
The proportioning of each raw material is: useless brick and tile powder 40~60 weight parts, ground granulated blast furnace slag is 20~40 weight parts, useless brick and tile particle 5~20 weight parts, straw 3~10 weight parts, admixture 5.0~20 weight parts, whipping agent 0.3~2.0 weight part.The technological process of production:
A kind of useless brick tile/straw foam concrete and preparation method thereof comprises the steps:
1, sub-electing useless brick and tile from building waste, with the useless brick and tile of crusher in crushing bulk, is then the screening choosing of 4.8mm and 1.2mm with sieve aperture, and the material of the particle of 4.8~1.2mm gathers materials as foamed concrete; Turn back to greater than the particle of 4.8mm again and carry out fragmentation in crusher, carry out grinding less than the useless brick and tile particle feeding ball mill of 1.2mm, the control fineness is 360~400m 2/ kg;
2, ground granulated blast furnace slag is specific surface area 450~500m 2/ kg;
3, straw is crushed to straw fiber below length 2cm with pulverizer, then uses 1~2% NaOH solution soaking 6~12 hours, filtration drying;
4, with each material in step 1~3 and admixture in a ratio mixing and stirring, add suitable quantity of water to stir into slurry;
5, whipping agent is 0.2 ratio with the quality ratio, adds in foaming machine, makes foam;
After the foams mix of the slurry that 6, step 4 is made and step 5 system stirs, casting.
This foamed concrete main raw is that the agriculture and industry wastes such as useless brick and tile, slag and straw cash account for more than 90%, is mixed in proportion a kind of porous material that forms through stirring, casting, maintenance with admixture, whipping agent and water.Whipping agent is can make material internal produce foam and the material that forms closed pore or connection pore structure material, and admixture is one or more above compositions of ceramic and organic materials.It is that the following straw fiber of 2cm is material that this foamed concrete adopts length, and vegetable fibre has the function of heat insulating, noise reducing and increase folding strength; Owing to containing relatively independent CAB and good globality in this foamed concrete, make this foamed concrete have good thermal and insulating performance and water resistance, the thermal conductivity that its thermal conductivity reaches less than the existing national standard requirement of each density building block; This foamed concrete material of main part is ceramic, can not burn, and therefore have good fire performance, but cast-in-site does not need the particular manufacturing craft less investment, and construction is fast, and is good with the base material associativity; This foamed concrete adds the material conduct of the particle of 4.8~1.2mm to gather materials, improved the intensity of this foamed concrete, therefore the foamed concrete of different densities has different intensity and thermal conductivity, can be used for the buildings non-bearing wall body (〉=5.0MPa), the roof heat insulation load larrying member (〉=2.5MPa), non bearing structure (〉=1.5MPa) and wallboard (〉=0.4MPa).The steam press maintenance operation has been saved in this foamed concrete and gas concrete contrast, more is conducive to save energy, realizes the resource recycling utilization of solid waste; This foamed concrete is the useless light material of a kind of profit simultaneously, has expanded the discarded use approach of industrial or agricultural, has both reduced cost, has saved again natural resource, meets the strategy of energy-saving and emission-reduction and Sustainable development.
Embodiment 1:
Useless brick and tile powder 55 weight parts, ground granulated blast furnace slag is 20 weight parts, useless brick and tile particle 5 weight parts, straw 10 weight parts, admixture (unslaked lime, water glass and latex powder) 8.0 weight parts, whipping agent 1.8 weight parts.After tested, dry apparent density is 350kg/m 3, 28 days ultimate compression strength 0.5MPa, thermal conductivity 0.061W/ (mK).
Embodiment 2:
Useless brick and tile powder 49 weight parts, ground granulated blast furnace slag is 24 weight parts, useless brick and tile particle 8 weight parts, straw 8 weight parts, admixture (unslaked lime, water glass and latex powder) 9.4 weight parts, whipping agent 1.6 weight parts.After tested, dry apparent density is 500kg/m 3, 28 days ultimate compression strength 2.5MPa, thermal conductivity 0.079W/ (mK).
Embodiment 3:
Useless brick and tile powder 44 weight parts, ground granulated blast furnace slag is 28 weight parts, useless brick and tile particle 10 weight parts, straw 7 weight parts, admixture (unslaked lime, sodium aluminate, water glass and latex powder) 9.9 weight parts, whipping agent 1.1 weight parts.After tested, dry apparent density is 690kg/m 3, 28 days ultimate compression strength 5.6MPa, thermal conductivity 0.096W/ (mK).
Embodiment 4:
Useless brick and tile powder 40 weight parts, ground granulated blast furnace slag is 32 weight parts, useless brick and tile particle 12 weight parts, straw 5 weight parts, admixture (unslaked lime, sodium aluminate, polyvinyl alcohol, water glass and latex powder) 10.2 weight parts, whipping agent 0.8 weight part.After tested, dry apparent density is 780kg/m 3, 28 days ultimate compression strength 7.6MPa, thermal conductivity 0.125W/ (mK).

Claims (1)

1. the preparation method of a useless brick tile/straw foam concrete, it is characterized in that: contain useless brick and tile powder, ground granulated blast furnace slag, straw, useless brick and tile particle, admixture, whipping agent, water, wherein admixture is one or two or more kinds composition in ceramic and organic materials, described inorganic non-metallic is unslaked lime, white lime, sodium aluminate, water glass, sodium sulfate, S-WAT or desulfurated plaster, described organic materials is methylcellulose gum, polyvinyl alcohol, silane coupling agent, latex powder, the proportioning of each raw material is: useless brick and tile powder 40~60 weight parts, ground granulated blast furnace slag is 20~40 weight parts, useless brick and tile particle 5~20 weight parts, straw 3~10 weight parts, admixture 5.0~20 weight parts, whipping agent 0.3~2.0 weight part,
Comprise the steps:
(1), sub-elect useless brick and tile from building waste, with the useless brick and tile of crusher in crushing bulk, the screening that is then 4.8mm and 1.2mm with sieve aperture is selected, the material of the particle of 4.8~1.2mm gathers materials as foamed concrete; Turn back to greater than the particle of 4.8mm again and carry out fragmentation in crusher, carry out grinding less than the useless brick and tile particle feeding ball mill of 1.2mm, the control fineness is 360~400m 2/ kg
(2), ground granulated blast furnace slag is specific surface area 450~500m 2/ kg;
(3), straw is crushed to straw fiber below length 2cm with pulverizer, then uses 1~2% NaOH solution soaking 6~12 hours, filtration drying;
(4), each material in step 1~3 and admixture be mixed in proportion stir, add suitable quantity of water to stir into slurry;
(5), whipping agent is 0.2 ratio with the quality ratio, adds in foaming machine, makes foam;
(6), after the foams mix of slurry that step 4 is made and step 5 system stirs, casting;
Made a kind of useless brick tile/straw foam concrete material.
CN 201010536160 2010-11-05 2010-11-05 Waste brick tile/straw foam concrete and preparation method thereof CN102464497B (en)

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