CN104876634A - Method for preparing aerated bricks and aerated brick preparing by using same - Google Patents
Method for preparing aerated bricks and aerated brick preparing by using same Download PDFInfo
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- CN104876634A CN104876634A CN201510259169.3A CN201510259169A CN104876634A CN 104876634 A CN104876634 A CN 104876634A CN 201510259169 A CN201510259169 A CN 201510259169A CN 104876634 A CN104876634 A CN 104876634A
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- 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
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Abstract
The invention discloses a method for preparing aerated bricks and an aerated brick preparing by using the same. The method for preparing aerated bricks comprises the following steps: carrying out ball-milling treatment on micro silicon powder, river sand, gypsum and water, so that mortar is obtained; adding quick lime, cement and aluminum powder into the mortar, so that slurry is obtained; carrying out pouring and steam pre-oxidized molding on the slurry, so that molded bricks are obtained; cutting the molded bricks, so that brick fragments are obtained; and carrying out steam curing on the brick fragments, so that aerated bricks are obtained. The method is simple in process and implemented by taking waste micro silicon powder as a raw material, so that the problems of resource waste and environmental pollution caused by the accumulation of micro silicon powder in industrial silicon production enterprises can be solved, the production cost can be lowered, and the productivity of enterprises can be improved.
Description
Technical field
The invention belongs to building material field, specifically, the present invention relates to the method preparing aerated bricks and the aerated bricks utilizing the method to prepare.
Background technology
China's industrial silicon production development is in recent years very swift and violent, and account for world industry silicon ultimate production 1/3, annual export volume has exceeded 600,000 tons.Through years development, the production capacity of China's industrial silicon, output and export volume all occupy first place in the world.At present, China's industrial silicon annual production is equivalent to the half of global aggregate demand, has very important impact to the development of world's silicon industry and related industries chain.
SILICA FUME is the SiO produced in silicon smelting process
2with the O in Si gas and air
2rapid oxidation condensation and the ultra-fine siliceous dusty material of one formed.Generally use as additive, but consumption is little.Many places outlying mountain area of industrial silicon production enterprise of China, nearby without SILICA FUME can be used in a large number to do the relevant industries of additive, SILICA FUME more difficult sale by the impact of freight charges, a large amount of SILICA FUME is caused to be piled up, spend a large amount of funds to go to maintain the management of SILICA FUME to also needing while environment, outer price lattice are not high and transportation logistics cost is higher.The comprehensive utilization of SILICA FUME has become a difficult problem of industrial silicon production enterprise.
The present invention utilizes the silicon-dioxide in SILICA FUME and lime reaction to generate Calucium Silicate powder, plays and gains in strength, heat insulation effect.This is to raising SILICA FUME added value, and improve recovery of micro silicon powder enthusiasm, the Sustainable development of silicon industry is significant.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, one object of the present invention is the aerated bricks that proposes a kind of method preparing aerated bricks He utilize the method to prepare.Wherein, the method preparing aerated bricks is with waste SILICA FUME for raw material, and technique is simple, and brick quality under same intensity that the aerated bricks prepared makes than traditional technology is light, good in insulation effect, achieves the utilization of industrial recovery of micro silicon powder.
According to an aspect of the present invention, the present invention proposes a kind of method preparing aerated bricks, comprising:
SILICA FUME, river sand, gypsum and water are carried out ball-milling processing, to obtain mortar;
Unslaked lime, cement and aluminium powder is added, to obtain slurries in described mortar;
Carry out described slurries to build the pre-oxygen with steam shaping, to obtain mould brick;
Described mould brick is cut, to obtain fragment of brick;
Described fragment of brick is carried out vapor cure, to obtain described aerated bricks.
The method technique is simple, and be raw material with waste, the aerated bricks prepared is lividity, not only outward appearance is beautiful, and size dimension is even, and the brick quality under same intensity made than traditional technology is light, good in insulation effect, is more applicable to building high building and uses; This not only can solve industrial silicon production enterprise SILICA FUME and pile up the problem causing the wasting of resources and environmental pollution, production cost can also be reduced, improve enterprise's production capacity, for high-level efficiency, low cost production aerated bricks provide a new approach, no small pushing effect will be had to the progress of China's industrial silicon metallurgical technology and the development of economic society.
In addition, the method preparing aerated bricks according to the above embodiment of the present invention can also have following additional technical characteristic:
In some embodiments of the invention, SiO in described river sand
2>=75 % by weight, K
2o+Na
2o≤5 % by weight, water ratio≤8 % by weight, silt content≤8 % by weight;
CaSO in described gypsum
4>=70 % by weight, MgO≤2 % by weight, muriate≤0.05 % by weight;
CaO in described unslaked lime>=75 % by weight, MgO≤5 % by weight, SiO
2≤ 5 % by weight, CO
2≤ 5 % by weight, oxidation rate≤15min, digestion temperature>=60 degree Celsius, fineness is 0.08mm square hole sieve screen over-size < 15 % by weight;
In described aluminium powder, solid divides >=65 % by weight (GLS-65 types) or >=70 % by weight (GLS-70 types), solid divides middle active aluminium content >=85 % by weight without granule, fineness be 0.075mm square hole sieve tail over≤3.0 % by weight, rate of gas generation is 4min >=40-60%, 16min >=90% and 30min >=99%.
In some embodiments of the invention, described river sand meets JC/T622-1996 " silicate building products sand " standard;
Described unslaked lime meets JC/T621-1996 " silicate building products unslaked lime " standard;
Described cement is the 425# ordinary Portland cement or the silicate cement that meet GB175-92 standard;
Described aluminium powder meets JC/T407-2000 " Aluminum Powder Applied in Lightweight Concrete cream " standard.
In some embodiments of the invention, described SILICA FUME, river sand, gypsum and water carry out ball-milling processing according to mass ratio 0.3-1:1-2:0.08-1:0.5-1.5, and preferably, mass ratio is 0.6:1:0.085:1.
In some embodiments of the invention, described mortar, unslaked lime, cement and aluminium powder mass ratio are 3-4:0.3-0.6:0.3-0.6:0.0005, and preferably, mass ratio is 3.5:0.4:0.32:0.0005.
In some embodiments of the invention, the concentration of described slurries is 1-1.4t/M
3.
In some embodiments of the invention, the pre-oxygen of described steam is shaping is keep under the steam ambient of 50 degrees Celsius 1-2 hour and complete.
In some embodiments of the invention, described vapor cure completes 0.1-1MPa maintenance 12 hours.
According to a second aspect of the invention, the present invention proposes a kind of aerated bricks, described aerated bricks is prepared by the foregoing method preparing aerated bricks.
In some embodiments of the invention, the intensity of described aerated bricks is 4.9-5.5, and dry density is 550-700.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the schema of the method preparing aerated bricks according to an embodiment of the invention.
Fig. 2 is the schema of the method preparing aerated bricks in accordance with another embodiment of the present invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
According to an aspect of the present invention, the present invention proposes a kind of method preparing aerated bricks.As shown in Figure 1, the method preparing aerated bricks according to the embodiment of the present invention comprises: SILICA FUME, river sand, gypsum and water are carried out ball-milling processing, to obtain mortar; Unslaked lime, cement and aluminium powder is added, to obtain slurries in described mortar; Carry out described slurries to build the pre-oxygen with steam shaping, to obtain mould brick; Described mould brick is cut, to obtain fragment of brick; And described fragment of brick is carried out vapor cure, to obtain described aerated bricks.
Thus, the method preparing aerated bricks of the embodiment of the present invention with discarded SILICA FUME for raw material and the aerated bricks for preparing of arrange in pairs or groups other materials river sand, gypsum, unslaked lime, cement and aluminium powder for lividity, not only outward appearance is beautiful, size dimension is even, the brick quality under same intensity made than traditional technology is light, good in insulation effect, is more applicable to building high building and uses; And the method technique is simple, with discarded SILICA FUME for raw material, not only can solve industrial silicon production enterprise SILICA FUME and pile up the problem causing the wasting of resources and environmental pollution, production cost can also be reduced, improve enterprise's production capacity, for high-level efficiency, low cost production aerated bricks provide a new approach, no small pushing effect will be had to the progress of China's industrial silicon metallurgical technology and the development of economic society.
The method preparing aerated bricks of the specific embodiment of the invention is described below in detail.
First, from the selection of raw material, prepare the river sand that adopts in the method for aerated bricks for meeting JC/T622-1996 " silicate building products sand " standard, wherein SiO according to the specific embodiment of the invention
2content is not less than 75%, K
2o+Na
2o total content is not more than 5%, and water ratio is not more than 8%, and silt content is not more than 8%, the inclusion such as free of bark, grass roots, and radioactivity should meet GB6763 regulation.The river sand epigranular adopted thus, foreign matter content, in the scope that national standard allows, is conducive to reacting with calcium generating Calucium Silicate powder, increases the effects such as corrosion-resisting wear-proof.
CaSO in the gypsum adopted in the method for aerated bricks is prepared according to the specific embodiment of the invention
4be not less than 70%, MgO and be not more than 2%, muriate is not more than 0.05%.Adopt this gypsum and SILICA FUME, river sand and water to carry out mix and blend thus and be conducive to follow-up cement retardative, and then reduce the above-mentioned slurries pre-oxygen time.
The unslaked lime adopted in the method for aerated bricks of preparing according to the specific embodiment of the invention meets JC/T621-1996 " silicate building products unslaked lime " standard, and wherein CaO is not less than 75%, MgO and is not more than 5%, SiO
2be not more than 5%, CO
2be not more than 5%, oxidation rate is not more than 15min, and digestion temperature is not less than 60 degrees Celsius, and fineness is that 0.08mm square hole sieve screen over-size is less than 15%.Adopt this unslaked lime to join in mortar thus and carry out stirring and evenly mixing with cement and aluminium powder, be conducive to and the SiO in river sand and SILICA FUME
2reaction generates Calucium Silicate powder, and then plays raising intensity in above-mentioned aerated bricks, increases heat insulation effect.
The cement adopted in the method for aerated bricks of preparing according to the specific embodiment of the invention is the 425# ordinary Portland cement or the silicate cement that meet GB175-92 standard.Adopt the 425# ordinary Portland cement meeting GB175-92 standard or silicate cement can increase slurries cohesive force aborning thus, and then improve the intensity of aerated bricks.
Preparing the aluminium powder adopted in the method for aerated bricks and should meet JC/T407-2000 " Aluminum Powder Applied in Lightweight Concrete cream " standard according to the specific embodiment of the invention, wherein GLS-65 type solid divide be not less than 65% or GLS-70 type solid divide and be not less than 70%, solid divides middle active aluminium content to be not less than 85%, without granule, fineness is that 0.075mm square hole sieve tails over and is not more than 3.0%, rate of gas generation 4min is not less than 40-60, and 16min is not less than 90%, 30min and is not less than 99%.Adopt thus meet the aluminium powder of JC/T407-2000 " Aluminum Powder Applied in Lightweight Concrete cream " standard can as the foaming agent of gas concrete.
Secondly, the raw material SILICA FUME according to above-mentioned Standard Selection, river sand, gypsum and water are carried out ball-milling processing, to obtain mortar; Unslaked lime, cement and aluminium powder is added, to obtain slurries in mortar.According to a particular embodiment of the invention, first, be carry out ball-milling processing according to mass ratio 0.3-1:1-2:0.08-1:0.5-1.5, to obtain mortar by described SILICA FUME, river sand, gypsum and water.According to a particular embodiment of the invention, the preferred 0.6:1:0.085:1 of mass ratio of above-mentioned SILICA FUME, river sand, gypsum and the water of preparing mortar.
According to a particular embodiment of the invention, in the above-mentioned mortar obtained through ball-milling processing, the median size of solid particulate is 30-200 order.Contriver finds, the quality of the fineness meeting remarkably influenced aerated bricks finished product of each raw material, the fineness of the river sand of especially the present invention's employing needs to control.Thus by advance SILICA FUME, river sand, gypsum being carried out ball-milling processing, obtaining containing median size is 30-200 object mortar, not only can improve the quality of aerated bricks thus, the mixture homogeneity of river sand and SILICA FUME and gypsum can also be improved simultaneously, and then improve the uniformity coefficient of the pore in aerated bricks product, and then improve the quality of aerated bricks.
According to another specific embodiment of the present invention, in mortar, add unslaked lime, cement and aluminium powder, to obtain slurries.Particularly by observing concentration of slurry, to add clear water or mortar adjustment.According to concrete example of the present invention, can be 3-4:0.3-0.6:0.3-0.6:0.0005 according to mass ratio by mortar, unslaked lime, cement and aluminium powder, after mixing.The suitable slurries of concentration can be obtained thus, to improve the quality of the aerated bricks prepared.According to concrete example of the present invention, the preferably mass ratio of mortar, unslaked lime, cement and aluminium powder is 3.5:0.4:0.32:0.0005.Thus, adopt this proportioning can improve the intensity of aerated bricks further cost advantage is maximized while, not only outward appearance is beautiful, and the brick quality under same intensity made than traditional technology is light, good in insulation effect, is more applicable to building high building and uses.Through test of many times, aluminium powder, cement and lime add needs strict control, and cement and lime adds cutting steel wire when too much words can cause cutting and frequently ruptures, and do not cut, dry density raises, and be unfavorable for that high-rise building uses, otherwise then intensity is not all right; It is too much that aluminium powder adds bubble when too much words can cause slurries pre-oxygen, the insufficient strength of brick, otherwise get angry not, and slurries can not foam.
According to a particular embodiment of the invention, the concentration of slurries obtained above is 1-1.4t/M
3, preferred 1t/M
3, the quality of the aerated bricks prepared can be improved thus further.Concentration of slurry directly has influence on the shaping of brick, and the too low words pre-oxygen time is double, and restriction is produced; The too high Hua Bu Eng demoulding, does not cut.According to a particular embodiment of the invention, further, it is shaping to carry out above-mentioned slurries to build the pre-oxygen with steam, to obtain mould brick, and is cut by mould brick, to obtain fragment of brick.According to a particular embodiment of the invention, the pre-oxygen of steam is shaping is keep under the steam ambient of 50 degrees Celsius 1-2 hour and complete.Can effectively prepare the second best in quality aerated bricks thus.
According to concrete example of the present invention, build that the pre-oxygen with steam is shaping can carry out according to following concrete steps, slurries are poured into 3.5m
3framed, framedly when building leave 10cm space; Push closed room being equipped with the framed of slurries, it is shaping that the steam passing into 50 degrees Celsius carries out pre-oxygen; Rear slurry volumetric expansion in 1-2 hour, becomes solid, and upper end portion has been overflowed framed; Release framed, the slurries of solidification are placed cutting bed, needed for client, size adjustment steel wire cuts, and obtains fragment of brick.
According to a particular embodiment of the invention, further, said brick is carried out vapor cure, to obtain aerated bricks.
It is according to a particular embodiment of the invention, above-mentioned that to carry out vapor cure to fragment of brick be maintenance 12 hours and completing under the vapor pressure of 0.1-1MPa.Particularly, the fragment of brick of well cutting can be loaded steam still and pass into steam, keep certain pressure maintenance to take out after 12 hours.Aerated bricks can be made thus to obtain further maintenance, improve its hardness.
According to a further aspect in the invention, the invention allows for a kind of aerated bricks.Aerated bricks according to the embodiment of the present invention is prepared by the foregoing method preparing aerated bricks.According to a particular embodiment of the invention, the intensity of the aerated bricks prepared by aforesaid method can reach 4.9-5.5, and dry density reaches 550-700.Therefore, brick quality under same intensity that the aerated bricks of the above embodiment of the present invention makes compared with traditional technology is light, is more applicable to building high building and uses; Aerated bricks is lividity, and the beautiful size dimension of outward appearance is even.In addition, the aerated bricks of the above embodiment of the present invention is using SILICA FUME as raw material, not only can solve industrial silicon production enterprise SILICA FUME and pile up the problem causing the wasting of resources and environmental pollution, improve enterprise's production capacity, reduce production cost, and no small pushing effect will be had to the progress of China's industrial silicon metallurgical technology and the development of economic society.
Embodiment 1
1, every cube of aerated bricks adds SILICA FUME 50kg.Aerated bricks 3.5m can be produced according to technique one mould
3, as shown in Figure 2, after taking SILICA FUME 960kg and river sand 1600kg, gypsum 136kg (0.6:1:0.085) mixing, ball milling becomes mortar;
2, get 3500kg mortar, allocate cement 400kg into, lime 320kg, aluminium powder 0.05kg (3.5:0.4:0.32:0.0005) stirs, and obtains slurries;
3, slurries are poured into 3.5m
3framed, framedly when building leave 10cm space; Push closed room being equipped with the framed of slurries, it is shaping that the steam passing into 50 degrees Celsius carries out pre-oxygen; Rear slurry volumetric expansion in 1-2 hour, becomes solid, and upper end portion has been overflowed framed; Release framed, the slurries of solidification are placed cutting bed, needed for client, size adjustment steel wire cuts, and obtains 10cm × 10cm × 10cm fragment of brick.
4, the fragment of brick of well cutting is loaded steam still and pass into steam, keep pressure to be that 0.1-1MPa maintenance was taken out after 12 hours.
5, after steam pressure goes out still, aerated bricks every layer is got one piece, detect its ultimate compression strength.The highest can reach 5.0Mpa, and average intensity is 4.1-4.4Mpa, and dry density is 590, and indices all reaches 06 grade of brick requirement, compares Standard quality and alleviates 35kg.
Embodiment 2
1, every cube of aerated bricks adds SILICA FUME 80kg.As shown in Figure 2, after taking SILICA FUME 500kg and river sand 1200kg, gypsum 80kg (0.5:1.2:0.08) mixing, ball milling becomes mortar;
2, get 3500kg mortar, allocate cement 400kg into, lime 350kg, aluminium powder 0.05kg (3.5:0.4:0.35:0.0005) stirs;
3, slurries are poured into 3.5m
3framed, framedly when building leave 10cm space; Push closed room being equipped with the framed of slurries, it is shaping that the steam passing into 50 degrees Celsius carries out pre-oxygen; Rear slurry volumetric expansion in 1-2 hour, becomes solid, and upper end portion has been overflowed framed; Release framed, the slurries of solidification are placed cutting bed, needed for client, size adjustment steel wire cuts, and obtains 10cm × 10cm × 10cm fragment of brick.
4, the fragment of brick of well cutting is loaded steam still and pass into steam, keep pressure to be that 0.1-1MPa maintenance was taken out after 12 hours.
5, after steam pressure goes out still, aerated bricks every layer is got one piece, detect its ultimate compression strength.The highest can reach 5.5Mpa, and minimum is 4.9Mpa, mean value 5.1Mpa, and dry density is 675, and indices all reaches 07 grade of brick requirement, compares Standard quality and alleviates 50kg.Because of river sand and SILICA FUME segregation problems, therefore choose the pressure testing of fragment of brick two ends and compare, intensity difference in fragment of brick two ends, at 0.3Mpa, can reach Standard.
In the description of this specification sheets, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term need not for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification sheets or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (10)
1. prepare a method for aerated bricks, it is characterized in that, comprising:
SILICA FUME, river sand, gypsum and water are carried out ball-milling processing, to obtain mortar;
Unslaked lime, cement and aluminium powder is added, to obtain slurries in described mortar;
Carry out described slurries to build the pre-oxygen with steam shaping, to obtain mould brick;
Described mould brick is cut, to obtain fragment of brick; And
Described fragment of brick is carried out vapor cure, to obtain described aerated bricks.
2. the method preparing aerated bricks according to claim 1, is characterized in that, SiO in described river sand
2>=75 % by weight, K
2o+Na
2o≤5 % by weight, water ratio≤8 % by weight, silt content≤8 % by weight;
CaSO in described gypsum
4>=70 % by weight, MgO≤2 % by weight, muriate≤0.05 % by weight;
CaO in described unslaked lime>=75 % by weight, MgO≤5 % by weight, SiO
2≤ 5 % by weight, CO
2≤ 5 % by weight, oxidation rate≤15min, digestion temperature>=60 degree Celsius, fineness is 0.08mm square hole sieve screen over-size < 15 % by weight;
In described aluminium powder, solid divides >=65 % by weight (GLS-65 types) or >=70 % by weight (GLS-70 types), solid divides middle active aluminium content >=85 % by weight without granule, fineness be 0.075mm square hole sieve tail over≤3.0 % by weight, rate of gas generation is 4min >=40-60%, 16min >=90% and 30min >=99%
Optionally, described river sand meets JC/T622-1996 " silicate building products sand " standard;
Described unslaked lime meets JC/T621-1996 " silicate building products unslaked lime " standard;
Described cement is the 425# ordinary Portland cement or the silicate cement that meet GB175-92 standard;
Described aluminium powder meets JC/T407-2000 " Aluminum Powder Applied in Lightweight Concrete cream " standard.
3. the method preparing aerated bricks according to claim 1, is characterized in that, the 30-200 order of solid particulate in described mortar.
4. the method preparing aerated bricks according to claim 1, it is characterized in that, described SILICA FUME, river sand, gypsum and water carry out ball-milling processing according to mass ratio 0.3-1:1-2:0.08-1:0.5-1.5, and preferably, mass ratio is 0.6:1:0.085:1.
5. the method preparing aerated bricks according to claim 1, is characterized in that, described mortar, unslaked lime, cement and aluminium powder mass ratio are 3-4:0.3-0.6:0.3-0.6:0.0005, and preferably, mass ratio is 3.5:0.4:0.32:0.0005.
6. the method preparing aerated bricks according to claim 1, is characterized in that, the concentration of described slurries is 1-1.4t/M
3.
7. the method preparing aerated bricks according to claim 1, is characterized in that, the pre-oxygen of described steam is shaping is keep under the steam ambient of 50 degrees Celsius 1-2 hour and complete.
8. the method preparing aerated bricks according to claim 1, is characterized in that, described vapor cure is maintenance 12 hours and completing under the vapor pressure of 0.1-1MPa.
9. an aerated bricks, is characterized in that, described aerated bricks is prepared by the method described in any one of claim 1-8.
10. aerated bricks according to claim 9, is characterized in that, the intensity of described aerated bricks is 4.9-5.5, and dry density is 550-700.
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| CN111003982A (en) * | 2019-12-18 | 2020-04-14 | 湖南三一快而居住宅工业有限公司 | Ultrafine silica sand tailing powder autoclaved aerated concrete and preparation method thereof |
| CN111018462A (en) * | 2018-10-09 | 2020-04-17 | 襄阳长城星科建材有限公司 | High-impermeability aerated brick and preparation method thereof |
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| CN111018462A (en) * | 2018-10-09 | 2020-04-17 | 襄阳长城星科建材有限公司 | High-impermeability aerated brick and preparation method thereof |
| CN109467347A (en) * | 2019-01-17 | 2019-03-15 | 广州市宏顺轻质墙体材料有限公司 | Steam pressurized brick |
| CN109650823A (en) * | 2019-01-29 | 2019-04-19 | 佛冈豪鑫环保建材有限公司 | High-strength environment-friendly aerated bricks |
| CN111003982A (en) * | 2019-12-18 | 2020-04-14 | 湖南三一快而居住宅工业有限公司 | Ultrafine silica sand tailing powder autoclaved aerated concrete and preparation method thereof |
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