CN106477983B - A kind of preparation method of the steaming-free air-adding brick based on industry, agricultural and building waste - Google Patents

A kind of preparation method of the steaming-free air-adding brick based on industry, agricultural and building waste Download PDF

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CN106477983B
CN106477983B CN201610839584.0A CN201610839584A CN106477983B CN 106477983 B CN106477983 B CN 106477983B CN 201610839584 A CN201610839584 A CN 201610839584A CN 106477983 B CN106477983 B CN 106477983B
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agricultural
building waste
steaming
industry
free air
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CN106477983A (en
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王文庆
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Jiangxi Zhong Guo Environmental Protection Technology Co ltd
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Dongguan Lianzhou Intellectual Property Operation and Management Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/30Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/30Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • C04B2201/32Mortars, 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
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, 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)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The present invention provides a kind of steaming-free air-adding brick based on industry, agricultural and building waste, and specific preparation method is:Concrete and brick slag are mixed with polystyrene foaming granule, then through separating twice, and heating stirring obtains modified building waste;By mud dry it is levigate after with straw ash, paddy ash and bean dregs mix, grind obtain modified agricultural waste;Modified building rubbish and modified agricultural waste are mixed, it is dry to stir, add cement, lime, flyash, mineral slag, spent pulping liquor, NF aliphatic water reducing agents, sodium carbonate, sodium bicarbonate, polypropylene fibre, water, stirring is added in mixing, mold is poured into, is pressurizeed, heating curing obtains product.Steaming-free air-adding brick good heat preservation performance based on industry, agricultural and building waste prepared by the present invention, and a variety of modified rubbish are comprehensively utilized, economy is high, environmentally protective.

Description

A kind of preparation method of the steaming-free air-adding brick based on industry, agricultural and building waste
Technical field
The invention belongs to building material fields, and in particular to a kind of steaming-free air-adding based on industry, agricultural and building waste The preparation method of brick.
Background technology
With the fast development of city-building, various building wastes as waste residue soil, broken brick, discarded concrete, be scattered Mortar, a small amount of steel, timber, glass, plastics and packaging material etc. sharply increase, and the stacking of building waste not only occupies A large amount of soils destroy soil and water source, can also contaminated soil and water source, larger shadow is caused to ecological environment and social economy It rings, is unfavorable for the sustainable development of construction industry.
The main component of building waste is silicate, oxide, hydroxide, carbonate, sulfide and sulfate etc., is changed It learns property relatively to stablize, hardness, wearability, toughness, frost resistance, water resistance etc. are relatively good, and performance is even better than clay, silty soil Sand and rendzinas.Therefore, in recent years, the regeneration of building waste resource is studied very much, in addition to being used for engineering backfill, adding Gu soft soil foundation pushes away mountain and makes scape, outside roadbase, it is also used as raw material and prepares regeneration concrete, cement mortar and brick material.
Brick material can be divided into fired brick and non-sintered brick according to the difference of production technology, wherein non-sintered building refuse brick be with Building waste is primary raw material, after second-time breakage is sieved, using a small amount of cementing material as auxiliary agent, and agitated compression moulding, from So maintenance or steam press maintenance after become brick material, especially non-fired and non-steamed bricks both be not necessarily to roasting, without with steam for maintenance, more It is environmentally protective.A kind of air-entraining concrete brick without team-pressing and its processing method disclosed in Chinese patent CN 1597599A, the brick is by water Mud, flyash, spun yarn, water, gypsum, aluminium powder are as primary raw material, then are aided with sodium chloride, calcium chloride, water-reducing agent, sodium sulphate, Soviet Union It beats, waterproofing agent and sulfanole, through pouring, 40-60 DEG C is heating and curing, and steam or water seasoning obtain non-evaporating pressure cellular concrete Brick, the concrete brick finishing coat process of steam pressure prepared by this method, but there is still a need for steam curings.Chinese patent CN 102617076B is disclosed to produce non-evaporating curing concrete aerated insulation brick and its production method using building waste, contains in insulating brick There are cement, building waste aggregate, calcium oxide, calcium sulfate, carbamide, polyvinyl alcohol, hydroxypropyl methyl fiber, calcium carbonate, aluminium powder Equal foaming agents and water are constituted, and conserve to obtain non-evaporating curing concrete heat preservation through dispensing, mixing, injection molding, solidification, plastic covering film greenhouse Brick, the insulating brick is using building waste as aggregate, with the non-evaporating curing concrete aerated insulation brick of other raw material laminating productions such as cement.
Applied in non-evaporating foster insulating brick it is found that aggregate can be used as by building waste by the above-mentioned prior art, first Building waste is only recycled, secondly the dosage of building waste is also little, it is difficult to largely improve the environment of building waste Problem and economic value.
Invention content
The technical problem to be solved in the present invention is to provide it is a kind of based on industry, agricultural and building waste steaming-free air-adding brick, The building waste being modified using polystyrene foaming granule, using the straw ash, paddy ash and bean dregs agricultural rubbish being modified through mud Rubbish, then it is fine with cement, lime, flyash, slag, spent pulping liquor, NF aliphatic water reducing agents, sodium carbonate, sodium bicarbonate, polypropylene Dimension mixing obtains the steaming-free air-adding brick based on industry, agricultural and building waste through pouring, curing, conserve.Base prepared by this method In industry, agricultural and building waste steaming-free air-adding brick by building waste and agricultural waste after modified with industrial refuse and other Auxiliary agent is mixed with to obtain, and this method fully utilizes various garbage, and is modified into row major to rubbish, improves the property of rubbish Can, utilization rate is high, good in economic efficiency, and multiple material all has frothing function, can repeatedly be foamed in preparation process, Keep the bubble in aerated bricks more and uniformly, can significantly add the heat-insulating property of brick material, have no effect on the mechanical performance of brick material.
In order to solve the above technical problems, the technical scheme is that:
A kind of preparation method of the steaming-free air-adding brick based on industry, agricultural and building waste, includes the following steps:
(1) concrete and brick slag mix, then mixed through separating twice after primary crush with polystyrene foaming granule Aggregate is closed, heating stirring obtains modified building waste;
(2) by mud dry it is levigate after mix with straw ash, paddy ash and bean dregs, regrind into powder, obtain modification Agricultural waste;
(3) modification agricultural waste prepared by the modified building rubbish and step (2) prepared step (1) mixes, dry to stir, then Cement, lime, flyash, slag, spent pulping liquor, NF aliphatic water reducing agents, sodium carbonate, sodium bicarbonate, polypropylene fibre is added, After mixing, water is added, after stirring evenly, pours into mold, pressurizes, heating curing is obtained based on industry, agricultural and building rubbish The steaming-free air-adding brick of rubbish.
As a preferred embodiment of the above technical solution, in the step (1), concrete, brick slag and polystyrene foaming granule Weight ratio is 1:1-1.5:0.2-0.4.
As a preferred embodiment of the above technical solution, in the step (1), the grain size for mixing aggregate is less than 5mm.
As a preferred embodiment of the above technical solution, in the step (1), the temperature of heating stirring is 40-60 DEG C.
As a preferred embodiment of the above technical solution, in the step (2), it is 0.05-0.5mm that mud, which dries levigate grain size,.
As a preferred embodiment of the above technical solution, in the step (2), mud, straw ash, paddy ash and bean dregs mass ratio It is 1:0.5-0.8:0.4-0.6:0.5-0.7.
As a preferred embodiment of the above technical solution, in the step (3), the pressure of pressurization is 5-10MPa, time 5- 10min。
As a preferred embodiment of the above technical solution, in the step (3), heat-cured temperature is 70-90 DEG C, and the time is 30-60min。
Compared with prior art, the invention has the advantages that:
(1) contain in the steaming-free air-adding brick based on industry, agricultural and building waste prepared by the present invention and sent out through polystyrene Granule modified building waste is steeped, polystyrene foaming granule is penetrated into the gap of building refuse concrete and brick material, and Heated stirring promotes polystyrene foaming granule to carry out one step foaming, not only reduces the crushing difficulty of building waste, make to build The particle smaller of building refuse, and be conducive to carry out second time of foaming in the forming process of aerated bricks, promote the equal of brick material bubble Even property.
(2) in the steaming-free air-adding brick based on industry, agricultural and building waste prepared by the present invention containing being modified through mud Agricultural waste, the ingredient in agricultural waste are straw ash, paddy ash and bean dregs, mud with straw ash, paddy is grey and bean dregs are wanted to tie Closing has excellent gelatinization results, and the organic substance expanded by heating in agricultural waste can form bubble, advantageously forms uniformly Stomata, advantageously reduce the quality of brick material, improve mechanical strength and heat insulation effect, reduce cost.
(3) contain industrial refuse fine coal in the steaming-free air-adding brick based on industry, agricultural and building waste prepared by the present invention Ash, slag, spent pulping liquor, flyash, slag are all excellent cementitious materials, and spent pulping liquor is the waste of paper mill discharge, can Using as foaming agent, then by mixed with cement, lime, NF aliphatic water reducing agents, sodium carbonate, sodium bicarbonate and polypropylene fibre It closes, the comprehensive performance for improving aerated bricks.
(4) various rubbish are comprehensively utilized in the steaming-free air-adding brick based on industry, agricultural and building waste prepared by the present invention, And according to the performance of rubbish, first rubbish is modified, then aerated bricks are compounded to form with other auxiliary agents, in the aerated bricks of preparation Containing more and uniform bubble, aerated bricks it is light, heat insulation effect and mechanical strength are good, and fully utilize a variety of industry rubbish Rubbish improves the performance of rubbish, improves economic value.
Specific implementation mode
Below in conjunction with specific embodiment, the present invention will be described in detail, herein illustrative examples and explanation of the invention For explaining the present invention, but it is not as a limitation of the invention.
Embodiment 1:
(1) in parts by mass, by 1 part of concrete and 1 part of brick slag after primary crush, the polystyrene with 0.2 part Expanded beads mix, then obtain the mixing aggregate that grain size is less than 5mm through separating twice, and heating stirring obtains modified build at 40 DEG C Building refuse.
(2) in parts by mass, 1 part of mud is dried into the particle that levigate formation grain size is 0.05mm, the stalk with 0.5 part Ash, 0.4 part of paddy ash and the mixing of 0.5 part of bean dregs, regrind into powder, obtain modified agricultural waste.
(3) in parts by mass, 1 part of flyash, 0.3 part of slag and 2 parts of spent pulping liquor are mixed to form industrial refuse.
(4) in parts by mass, 20 parts of modified building rubbish and 10 parts of modification agricultural waste are mixed, it is dry to stir, then add Enter 30 parts of cement, 5 parts of lime, 15 parts of industrial refuse, 1 part of NF aliphatic water reducing agents, 5 parts of sodium carbonate and bicarbonate Sodium, 5 parts of polypropylene fibre are added 30 parts of water, after stirring evenly, pour into mold, pressurize at 5MPa after mixing 5min, heating curing 30min at 70 DEG C obtain the steaming-free air-adding brick based on industry, agricultural and building waste.
Embodiment 2:
(1) in parts by mass, by 1 part of concrete and 1.5 parts of brick slag after primary crush, the polyphenyl second with 0.4 part Alkene expanded beads mix, then obtain the mixing aggregate that grain size is less than 5mm through separating twice, and heating stirring obtains modification at 60 DEG C Building waste.
(2) in parts by mass, 1 part of mud is dried into the particle that levigate formation grain size is 0.5mm, the stalk with 0.8 part Ash, 0.6 part of paddy ash and the mixing of 0.7 part of bean dregs, regrind into powder, obtain modified agricultural waste.
(3) in parts by mass, 1 part of flyash, 0.5 part of slag and 3 parts of spent pulping liquor are mixed to form industrial refuse.
(4) in parts by mass, 40 parts of modified building rubbish and 25 parts of modification agricultural waste are mixed, it is dry to stir, then add Enter 60 parts of cement, 10 parts of lime, 30 parts of industrial refuse, 5 parts of NF aliphatic water reducing agents, 10 parts of sodium carbonate and carbonic acid Hydrogen sodium, 10 parts of polypropylene fibre are added 50 parts of water, after stirring evenly, pour into mold after mixing, add at 10MPa 10min is pressed, heating curing 60min at 90 DEG C obtains the steaming-free air-adding brick based on industry, agricultural and building waste.
Embodiment 3:
(1) in parts by mass, by 1 part of concrete and 1.2 parts of brick slag after primary crush, the polyphenyl second with 0.3 part Alkene expanded beads mix, then obtain the mixing aggregate that grain size is less than 5mm through separating twice, and heating stirring obtains modification at 45 DEG C Building waste.
(2) in parts by mass, 1 part of mud is dried into the particle that levigate formation grain size is 0.1mm, the stalk with 0.6 part Ash, 0.5 part of paddy ash and the mixing of 0.6 part of bean dregs, regrind into powder, obtain modified agricultural waste.
(3) in parts by mass, 1 part of flyash, 0.4 part of slag and 2.5 parts of spent pulping liquor are mixed to form industrial rubbish Rubbish.
(4) in parts by mass, 25 parts of modified building rubbish and 15 parts of modification agricultural waste are mixed, it is dry to stir, then add Enter 40 parts of cement, 7 parts of lime, 25 parts of industrial refuse, 3 parts of NF aliphatic water reducing agents, 7 parts of sodium carbonate and bicarbonate Sodium, 8 parts of polypropylene fibre are added 35 parts of water, after stirring evenly, pour into mold, pressurize at 7MPa after mixing 6min, heating curing 45min at 75 DEG C obtain the steaming-free air-adding brick based on industry, agricultural and building waste.
Embodiment 4:
(1) in parts by mass, by 1 part of concrete and 1.3 parts of brick slag after primary crush, the polyphenyl second with 0.3 part Alkene expanded beads mix, then obtain the mixing aggregate that grain size is less than 5mm through separating twice, and heating stirring obtains modification at 55 DEG C Building waste.
(2) in parts by mass, 1 part of mud is dried into the particle that levigate formation grain size is 0.3mm, the stalk with 0.6 part Ash, 0.4 part of paddy ash and the mixing of 0.5 part of bean dregs, regrind into powder, obtain modified agricultural waste.
(3) in parts by mass, 1 part of flyash, 0.5 part of slag and 3 parts of spent pulping liquor are mixed to form industrial refuse.
(4) in parts by mass, 35 parts of modified building rubbish and 15 parts of modification agricultural waste are mixed, it is dry to stir, then add Enter 50 parts of cement, 5 parts of lime, 25 parts of industrial refuse, 2 parts of NF aliphatic water reducing agents, 6 parts of sodium carbonate and bicarbonate Sodium, 8 parts of polypropylene fibre are added 40 parts of water, after stirring evenly, pour into mold, pressurize at 8MPa after mixing 8min, heating curing 50min at 85 DEG C obtain the steaming-free air-adding brick based on industry, agricultural and building waste.
Embodiment 5:
(1) in parts by mass, by 1 part of concrete and 1.5 parts of brick slag after primary crush, the polyphenyl second with 0.2 part Alkene expanded beads mix, then obtain the mixing aggregate that grain size is less than 5mm through separating twice, and heating stirring obtains modification at 55 DEG C Building waste.
(2) in parts by mass, 1 part of mud is dried into the particle that levigate formation grain size is 0.25mm, the stalk with 0.7 part Ash, 0.6 part of paddy ash and the mixing of 0.5 part of bean dregs, regrind into powder, obtain modified agricultural waste.
(3) in parts by mass, 1 part of flyash, 0.5 part of slag and 2 parts of spent pulping liquor are mixed to form industrial refuse.
(4) in parts by mass, 20 parts of modified building rubbish and 15 parts of modification agricultural waste are mixed, it is dry to stir, then add Enter 45 parts of cement, 5 parts of lime, 15 parts of industrial refuse, 2 parts of NF aliphatic water reducing agents, 7 parts of sodium carbonate and bicarbonate Sodium, 8 parts of polypropylene fibre are added 45 parts of water, after stirring evenly, pour into mold, pressurize at 8MPa after mixing 10min, heating curing 60min at 70 DEG C obtain the steaming-free air-adding brick based on industry, agricultural and building waste.
Embodiment 6:
(1) in parts by mass, by 1 part of concrete and 1.5 parts of brick slag after primary crush, the polyphenyl second with 0.2 part Alkene expanded beads mix, then obtain the mixing aggregate that grain size is less than 5mm through separating twice, and heating stirring obtains modification at 60 DEG C Building waste.
(2) in parts by mass, 1 part of mud is dried into the particle that levigate formation grain size is 0.25mm, the stalk with 06 part Ash, 0.4 part of paddy ash and the mixing of 0.7 part of bean dregs, regrind into powder, obtain modified agricultural waste.
(3) in parts by mass, 1 part of flyash, 0.3 part of slag and 2 parts of spent pulping liquor are mixed to form industrial refuse.
(4) in parts by mass, 35 parts of modified building rubbish and 15 parts of modification agricultural waste are mixed, it is dry to stir, then add Enter 45 parts of cement, 7 parts of lime, 25 parts of industrial refuse, 5 parts of NF aliphatic water reducing agents, 10 parts of sodium carbonate and bicarbonate Sodium, 6 parts of polypropylene fibre are added 45 parts of water, after stirring evenly, pour into mold, pressurize at 10MPa after mixing 8min, heating curing 40min at 75 DEG C obtain the steaming-free air-adding brick based on industry, agricultural and building waste.
The hole collection distribution for the steaming-free air-adding brick based on industry, agricultural and building waste that after testing, prepared by embodiment 1-6, The result of porosity, mechanical strength and heat insulation effect is as follows:
Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 Embodiment 6
Ratio (%) shared by hole less than 20nm 76 80 81 79 83 81
Porosity (%) 18.4 19.5 18.4 18.6 19.0 19.2
Compression strength is (MPa) 3.9 4.2 4.0 4.1 3.9 4.1
Thermal coefficient (W/mk) 0.91 0.84 0.88 0.87 0.89 0.86
Heat storage coefficient (W/m2·k) 9.2 10.2 9.8 9.5 9.4 10.0
As seen from the above table, the present invention prepare based on industry, agricultural and building waste steaming-free air-adding brick hole more than and Uniformly, mostly harmless hole, and mechanical strength and good heat insulating.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe The personage for knowing this technology can all carry out modifications and changes to above-described embodiment without violating the spirit and scope of the present invention.Cause This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as At all equivalent modifications or change, should by the present invention claim be covered.

Claims (8)

1. a kind of preparation method of the steaming-free air-adding brick based on industry, agricultural and building waste, which is characterized in that including following step Suddenly:
(1) concrete and brick slag mix after primary crush with polystyrene foaming granule, then obtain mixing bone through separating twice Material, heating stirring obtain modified building waste;
(2) by mud dry it is levigate after mix with straw ash, paddy ash and bean dregs, regrind the agricultural that modification is obtained at powder Rubbish;
(3) modification agricultural waste prepared by the modified building rubbish and step (2) prepared step (1) mixes, dry to stir, and adds Cement, lime, flyash, slag, spent pulping liquor, NF aliphatic water reducing agents, sodium carbonate, sodium bicarbonate, polypropylene fibre, mixing After uniformly, water is added, after stirring evenly, pours into mold, pressurize, heating curing is obtained based on industry, agricultural and building waste Steaming-free air-adding brick.
2. a kind of preparation method of steaming-free air-adding brick based on industry, agricultural and building waste according to claim 1, It is characterized in that:In the step (1), the weight ratio of concrete, brick slag and polystyrene foaming granule is 1:1-1.5:0.2- 0.4。
3. a kind of preparation method of steaming-free air-adding brick based on industry, agricultural and building waste according to claim 1, It is characterized in that:In the step (1), the grain size for mixing aggregate is less than 5mm.
4. a kind of preparation method of steaming-free air-adding brick based on industry, agricultural and building waste according to claim 1, It is characterized in that:In the step (1), the temperature of heating stirring is 40-60 DEG C.
5. a kind of preparation method of steaming-free air-adding brick based on industry, agricultural and building waste according to claim 1, It is characterized in that:In the step (2), it is 0.05-0.5mm that mud, which dries levigate grain size,.
6. a kind of preparation method of steaming-free air-adding brick based on industry, agricultural and building waste according to claim 1, It is characterized in that:In the step (2), mud, straw ash, paddy ash and bean dregs mass ratio be 1:0.5-0.8:0.4-0.6: 0.5-0.7。
7. a kind of preparation method of steaming-free air-adding brick based on industry, agricultural and building waste according to claim 1, It is characterized in that:In the step (3), the pressure of pressurization is 5-10MPa, time 5-10min.
8. a kind of preparation method of steaming-free air-adding brick based on industry, agricultural and building waste according to claim 1, It is characterized in that:In the step (3), heat-cured temperature is 70-90 DEG C, time 30-60min.
CN201610839584.0A 2016-09-21 2016-09-21 A kind of preparation method of the steaming-free air-adding brick based on industry, agricultural and building waste Expired - Fee Related CN106477983B (en)

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CN107954648A (en) * 2017-11-20 2018-04-24 马鞍山豹龙新型建材有限公司 A kind of preparation method for adding the steaming-free air-adding brick for burning till plating slag mud
CN108298891A (en) * 2018-01-24 2018-07-20 合肥市大卓电力有限责任公司 A kind of environment friendly brick and preparation method thereof
CN108863268A (en) * 2018-07-20 2018-11-23 思力佳特种环保材料(深圳)有限公司 A kind of regeneration activity material based on building waste, preparation method and non-evaporating foamed bricks
CN109437682A (en) * 2018-11-23 2019-03-08 杨峰 A kind of combination ash light energy conservation insulating concrete and preparation method thereof
CN109320151A (en) * 2018-12-19 2019-02-12 建德市东胜建材有限公司 A kind of environment friendly brick and preparation method thereof

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