CN102731023A - Method for manufacturing waste fiber insulation load-bearing concrete building block - Google Patents
Method for manufacturing waste fiber insulation load-bearing concrete building block Download PDFInfo
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- CN102731023A CN102731023A CN2011100844783A CN201110084478A CN102731023A CN 102731023 A CN102731023 A CN 102731023A CN 2011100844783 A CN2011100844783 A CN 2011100844783A CN 201110084478 A CN201110084478 A CN 201110084478A CN 102731023 A CN102731023 A CN 102731023A
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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 manufacturing a waste fiber insulation load-bearing concrete building block, which belongs to the novel wall material technical field. The method of the invention is characterized in that the manufacturing method of the novel wall building material is the technical scheme with the characteristics of energy preservation and environmental protection, waste utilization, and is capable of greatly reducing the thermal conductivity, minimizing energy consumption, possessing self-thermal insulation effect and satisfying physical and mechanical performance. According to the invention, an insulation material is doped; thereby the building block possesses good thermal insulation performance, the thermal conductivity of the waste fiber insulation load-bearing concrete building block with different intensity ratios is 0.15-1.5W/(m.k), and the intensity grade can reach more than MU15. The combination of the insulation material and the waste fiber concrete building block provides the novel building block with self-thermal insulation effect, and improves the thermal insulation performance of the present walls and possesses significance for protecting environment and saving energy.
Description
Technical field
The making method of waste fiber heat-preserving load-bearing concrete segment of the present invention belongs to the novel wall material technical field.
Background technology
In recent years, in the newly-built buildings in developed country such as North America, Europe and area, about 85% body of wall adopts concrete small block.Since 2004, China's novel wall material obtains fast development, and novel wall material output has accounted for about 36% of materials for wall total amount, and wherein about 40% is concrete small block.Concrete small block has that production technique is simple, maintenance is convenient, needn't sintering; Advantages such as the speed of building by laying bricks or stones is fast, the integration engineering cost is low.Patent of invention " a kind of preparation method who contains the material of construction of useless the fiber " (patent No.: 201110021500X), disclose environmental protection and energy saving fiber type material of construction of a kind of comprehensive utilization that can realize flyash, slag and waste fiber material and preparation method thereof.Its advantage is: 1, realized the comprehensive utilization of flyash, slag and waste fiber material, practiced thrift the energy in the time of the protection environment.2, strengthen the snappiness of material of construction self, improved the physical and mechanical property of material.3,, can improve the anti-seismic performance of building masonry wall as if the unitized construction that this material is designed to dovetail mortise and tenon.But also there is following shortcoming:
The first, because concrete heat-insulating property is poor, cause the heat-insulating property of concrete segment also corresponding relatively poor.The concrete solid block is except that the heat-insulating property difference, and the weight of self is also bigger, has increased load of buildings; Though concrete small size hollow building block is superior to the concrete solid block on heat-insulating property, at the forming column or the stem stem place of buildings thin spot is arranged, be prone to form heat bridge, influence the heat-insulating property of buildings.
The second, the concrete segment masonry is prone to produce desciccation crack.Concrete small block is to be the concrete that coarse aggregate is made by rubble or cobble, and it has concrete fragility.The contract with dry rate of concrete small block is 0.235-0.425mm/m; And variation range is big; After natural curing in 28 days, its drying shrinkage is accomplished about 60% approximately, and such concrete small block is used in and very easily produces desciccation crack in the body of wall; Desciccation crack generally occurs between the mortar joint around the building block junction with masonry and Steel Concrete fine strain of millet, post, is the hair shape.This desciccation crack not only appears at top layer, the end standard width of a room in an old-style house, exists too at other standard widths of a room in an old-style house.
Three, in the demanding part of compression capability, the tensile strength of masonry is not enough.As: when fine strain of millet was bearing on the blockwork, because fine strain of millet end concentrated load is big, masonry produced excessive local stress, and step-like crack will appear in masonry in the certain altitude scope under supporting surface.
To patent of invention " a kind of preparation method who contains the material of construction of useless the fiber " (patent No.: advocate thriftiness the energetically requirement of the energy of the not enough and current China that exists 201110021500X); Research and develop a kind of energy-conserving and environment-protective, sharp useless, thermal conductivity significantly reduces, and reduces energy consumption; Has the self-heat conserving effect; Can satisfy the novel wall material of construction of general physical and mechanical property again, be very necessary, and will make major contribution to protection environment, save energy.
Summary of the invention
The purpose of the making method of waste fiber heat-preserving load-bearing concrete segment of the present invention is: overcome the deficiency that exists among patent of invention number " a kind of preparation method who contains the material of construction of useless fiber " for 201110021500X, provide a kind of energy-saving and environmental protection, sharp useless, the thermal-insulating and anti-cracking performance is good, unit weight is low, intensity is high, the technical scheme of convenient building, waste fiber heat-preserving load-bearing concrete segment that the decorations performance is good.
Waste fiber heat-preserving load-bearing concrete segment of the present invention is characterized in that the technical scheme that adopts is:
I. original material is: cement, sand, stone, haydite, flyash, slag, waste fiber, glass bead, water reducer; Initial formulation is: cement 510kg, medium sand 80kg, stone 500kg; Haydite is by 100%, 80%, 60% replacement stone of quality; Flyash and slag are by the 10%-20% replacement cement of quality, and wc 1: 0.3, waste and old fibre account for ready mixed concrete volume 0.5%-2%; Glass bead accounts for ready mixed concrete volume 100%, water reducer: account for ready mixed concrete quality 2%;
II. proportion scheme is following:
Cement 298-404kg, sand 80kg, stone 0-200kg; Haydite 500-300kg, slag 53-106kg, flyash 53-106kg; Wc 1: 0.3; Waste and old fibre: fiber volume accounts for ready mixed concrete TV 0.5%-2%, lagging material: glass bead accounts for ready mixed concrete TV 120%, water reducer: account for ready mixed concrete quality 2%;
III. building block manufacture craft
The building block size and dimension does not have particular requirement and restriction, can be according to the practical situation design Selection, and solid block master ga(u)ge lattice are 240mm * 115mm * 90mm, holllow building block master ga(u)ge lattice are 390mm * 190mm * 190mm; The manufacture craft of waste fiber heat-preserving load-bearing concrete segment is: levigate, batching, stirring, cast, cutting and maintenance; Wherein, the feeding sequence of batching is: at first cement, flyash, slag and portion water are dropped in the stirrer, stirred 0.5-1 minute; Again haydite, sand, stone are dropped in the stirrer; Stirred 0.5-1 minute, and at last glass bead, waste fiber, water reducer and surplus water were dropped into stirrer, stir and got final product in 1.5-2 minute; Concrete sample after the form removal is placed on temperature and is (20 ± 3) ℃, and relative humidity is the indoor maintenance of the normal curing more than 95%, and each interval is 10～20mm, makes an experiment behind the maintenance 28d, and ultimate compression strength is 15-41.5MP, and thermal conductivity is 0.15-1.5W/ (mk).
Waste fiber heat-preserving load-bearing concrete segment of the present invention compared with prior art has following advantage:
1, through mixing waste fiber (scrap stock of textile mills and waste and old clothes), the handling problem that has solved waste material has reduced its pollution problem to environment; Avoided the disaster hidden-trouble hidden simultaneously.
2, with in addition recycling of waste fiber, process waste and old fibre heat-preserving load-bearing concrete segment, can reduce production costs on the one hand, have economic benefit; On the other hand, solved because the waste and old fibre non-degradable if be imbedded in the soil layer, has fatal harm to the pedosphere plant, and the problem of indirect hazard human survival.
3, through mixing lagging material, can make building block that good heat-insulating property is arranged, the thermal conductivity of waste fiber heat-preserving load-bearing concrete segment varying strength proportioning according to the invention is 0.15-1.5W/ (mk), strength grade can reach more than the MU15.
4, combine lagging material with the waste fiber concrete segment, a kind of new type block of heat insulation building block is provided, improved the heat-insulating property of existing body of wall.
5, through mixing waste fiber (like high modulus fibre), make building block on the basis of original load-bearing effect, improve its tensile strength, toughness, adaptability to changes, impact resistance, avoided concrete segment some defectives on mechanical property.
6, waste fiber heat-preserving load-bearing concrete segment of the present invention can be used with waste and old textile fibres heat-preserving load-bearing concrete, improves the integral heat insulation performance of buildings.
Embodiment:
Embodiment 1
Discarded textile fibres heat-preserving load-bearing concrete segment, the component of said concrete segment and mixing ratio by weight (kg/m thereof
3) as follows:
Cement: 404kg, sand 80kg, haydite 500kg, slag 53kg, flyash 53kg, waste fiber: fiber volume accounts for 0.5% of ready mixed concrete TV, glass bead: account for 120% of ready mixed concrete TV, water reducer: account for ready mixed concrete quality 2%;
Said glass bead density is (110-150) kg/m
3
The manufacture craft of waste fiber heat-preserving load-bearing concrete segment is: levigate, batching, stirring, cast, cutting and maintenance.Wherein, The feeding sequence of batching is: at first cement, flyash, slag and portion water are dropped in the stirrer; Stirred 0.5 minute, and again haydite, sand, stone were dropped in the stirrer, stirred 0.5 minute; At last glass bead, waste fiber, water reducer and surplus water are dropped into stirrer, stir and got final product in 1.5 minutes.Concrete sample after the form removal makes an experiment behind normal curing 28d, and ultimate compression strength is 15MP, and thermal conductivity is 0.15W/ (mk).
Embodiment 2
Discarded textile fibres heat-preserving load-bearing concrete segment, the component of said concrete segment and mixing ratio by weight (kg/m thereof
3) as follows:
Cement: 404kg, sand 80kg, haydite 500kg, slag 53kg, flyash 53kg, waste fiber: fiber volume accounts for 1.5% of ready mixed concrete TV, glass bead: account for 120% of ready mixed concrete TV, water reducer: account for ready mixed concrete quality 2%;
Said glass bead density is (110-150) kg/m
3
The manufacture craft of waste fiber heat-preserving load-bearing concrete segment is: levigate, batching, stirring, cast, cutting and maintenance.Wherein, The feeding sequence of batching is: at first cement, flyash, slag and portion water are dropped in the stirrer; Stirred 0.5 minute, and again haydite, sand, stone were dropped in the stirrer, stirred 0.5 minute; At last glass bead, waste fiber, water reducer and surplus water are dropped into stirrer, stir and got final product in 1.5 minutes.Concrete sample after the form removal makes an experiment behind normal curing 28d, and ultimate compression strength is 16.6MP, and thermal conductivity is 0.17W/ (mk).
Embodiment 3
Discarded textile fibres heat-preserving load-bearing concrete segment, the component of said concrete segment and mixing ratio by weight (kg/m thereof
3) as follows:
Cement: 404kg, sand 80kg, haydite 500kg, slag 53kg, flyash 53kg, waste fiber: fiber volume accounts for 2% of ready mixed concrete TV, glass bead: account for 120% of ready mixed concrete TV, water reducer: account for ready mixed concrete quality 2%;
Said glass bead density is (110-150) kg/m
3
The manufacture craft of waste fiber heat-preserving load-bearing concrete segment is: levigate, batching, stirring, cast, cutting and maintenance.Wherein, The feeding sequence of batching is: at first cement, flyash, slag and portion water are dropped in the stirrer; Stirred 1 minute, and again haydite, sand, stone were dropped in the stirrer, stirred 1 minute; At last glass bead, waste fiber, water reducer and surplus water are dropped into stirrer, stir and got final product in 2 minutes.Concrete sample after the form removal makes an experiment behind normal curing 28d, and ultimate compression strength is 17.2MP, and thermal conductivity is 0.18W/ (mk).
Embodiment 4
Discarded textile fibres heat-preserving load-bearing concrete segment, the component of said concrete segment and mixing ratio by weight (kg/m thereof
3) as follows:
Cement: 352kg, sand 80kg, stone 100kg; Haydite 400kg, slag 79kg, flyash 79kg; Waste fiber: fiber volume accounts for 0.5% of ready mixed concrete TV, glass bead: account for 120% of ready mixed concrete TV, water reducer: account for ready mixed concrete quality 2%;
Said glass bead density is (110-150) kg/m
3
The manufacture craft of waste fiber heat-preserving load-bearing concrete segment is: levigate, batching, stirring, cast, cutting and maintenance.Wherein, The feeding sequence of batching is: at first cement, flyash, slag and portion water are dropped in the stirrer; Stirred 0.5 minute, and again haydite, sand, stone were dropped in the stirrer, stirred 0.5 minute; At last glass bead, waste fiber, water reducer and surplus water are dropped into stirrer, stir and got final product in 1.5 minutes.Concrete sample after the form removal makes an experiment behind normal curing 28d, and ultimate compression strength is 27.7MP, and thermal conductivity is 0.8W/ (mk).
Embodiment 5
Discarded textile fibres heat-preserving load-bearing concrete segment, the component of said concrete segment and mixing ratio by weight (kg/m thereof
3) as follows:
Cement: 352kg, sand 80kg, stone 100kg; Haydite 400kg, slag 79kg, flyash 79kg; Waste fiber: fiber volume accounts for 1.5% of ready mixed concrete TV, glass bead: account for 120% of ready mixed concrete TV, water reducer: account for ready mixed concrete quality 2%;
Said glass bead density is (110-150) kg/m
3
The manufacture craft of waste fiber heat-preserving load-bearing concrete segment is: levigate, batching, stirring, cast, cutting and maintenance.Wherein, The feeding sequence of batching is: at first cement, flyash, slag and portion water are dropped in the stirrer; Stirred 0.5 minute, and again haydite, sand, stone were dropped in the stirrer, stirred 0.5 minute; At last glass bead, waste fiber, water reducer and surplus water are dropped into stirrer, stir and got final product in 1.5 minutes.Concrete sample after the form removal makes an experiment behind normal curing 28d, and ultimate compression strength is 28.3MP, and thermal conductivity is 0.88W/ (mk).
Embodiment 6
Discarded textile fibres heat-preserving load-bearing concrete segment, the component of said concrete segment and mixing ratio by weight (kg/m thereof
3) as follows:
Cement: 352kg, sand 80kg, stone 100kg; Haydite 400kg, slag 79kg, flyash 79kg; Waste fiber: fiber volume accounts for 2% of ready mixed concrete TV, glass bead: account for 120% of ready mixed concrete TV, water reducer: account for ready mixed concrete quality 2%;
Said glass bead density is (110-150) kg/m
3
The manufacture craft of waste fiber heat-preserving load-bearing concrete segment is: levigate, batching, stirring, cast, cutting and maintenance.Wherein, The feeding sequence of batching is: at first cement, flyash, slag and portion water are dropped in the stirrer; Stirred 1 minute, and again haydite, sand, stone were dropped in the stirrer, stirred 1 minute; At last glass bead, waste fiber, water reducer and surplus water are dropped into stirrer, stir and got final product in 2 minutes.Concrete sample after the form removal makes an experiment behind normal curing 28d, and ultimate compression strength is 28.7MP, and thermal conductivity is 0.93W/ (mk).
Embodiment 7
Discarded textile fibres heat-preserving load-bearing concrete segment, the component of said concrete segment and mixing ratio by weight (kg/m thereof
3) as follows:
Cement: 298kg, sand 80kg, stone 200kg; Haydite 300kg, slag 106kg, flyash 106kg; Waste fiber: fiber volume accounts for 0.5% of ready mixed concrete TV, glass bead: account for 120% of ready mixed concrete TV, water reducer: account for ready mixed concrete quality 2%;
Said glass bead density is (110-150) kg/m
3
The manufacture craft of waste fiber heat-preserving load-bearing concrete segment is: levigate, batching, stirring, cast, cutting and maintenance.Wherein, The feeding sequence of batching is: at first cement, flyash, slag and portion water are dropped in the stirrer; Stirred 0.5 minute, and again haydite, sand, stone were dropped in the stirrer, stirred 0.5 minute; At last glass bead, waste fiber, water reducer and surplus water are dropped into stirrer, stir and got final product in 1.5 minutes.Concrete sample after the form removal makes an experiment behind normal curing 28d, and ultimate compression strength is 39.1MP, and thermal conductivity is 1.4W/ (mk).
Embodiment 8
Discarded textile fibres heat-preserving load-bearing concrete segment, the component of said concrete segment and mixing ratio by weight (kg/m thereof
3) as follows:
Cement: 298kg, sand 80kg, stone 200kg; Haydite 300kg, slag 106kg, flyash 106kg; Waste fiber: fiber volume accounts for 1.5% of ready mixed concrete TV, glass bead: account for 120% of ready mixed concrete TV, water reducer: account for ready mixed concrete quality 2%;
Said glass bead density is (110-150) kg/m
3
The manufacture craft of waste fiber heat-preserving load-bearing concrete segment is: levigate, batching, stirring, cast, cutting and maintenance.Wherein, The feeding sequence of batching is: at first cement, flyash, slag and portion water are dropped in the stirrer; Stirred 0.5 minute, and again haydite, sand, stone were dropped in the stirrer, stirred 0.5 minute; At last glass bead, waste fiber, water reducer and surplus water are dropped into stirrer, stir and got final product in 1.5 minutes.Concrete sample after the form removal makes an experiment behind normal curing 28d, and ultimate compression strength is 40.8MP, and thermal conductivity is 1.43W/ (mk).
Embodiment 9
Discarded textile fibres heat-preserving load-bearing concrete segment, the component of said concrete segment and mixing ratio by weight (kg/m thereof
3) as follows:
Cement: 298kg, sand 80kg, stone 200kg; Haydite 300kg, slag 106kg, flyash 106kg; Waste fiber: fiber volume accounts for 2% of ready mixed concrete TV, glass bead: account for 120% of ready mixed concrete TV, water reducer: account for ready mixed concrete quality 2%;
Said glass bead density is (110-150) kg/m
3
The manufacture craft of waste fiber heat-preserving load-bearing concrete segment is: levigate, batching, stirring, cast, cutting and maintenance.Wherein, The feeding sequence of batching is: at first cement, flyash, slag and portion water are dropped in the stirrer; Stirred 1 minute, and again haydite, sand, stone were dropped in the stirrer, stirred 1 minute; At last glass bead, waste fiber, water reducer and surplus water are dropped into stirrer, stir and got final product in 1.5-2 minute.Concrete sample after the form removal makes an experiment behind normal curing 28d, and ultimate compression strength is 41.5MP, and thermal conductivity is 1.5W/ (mk).
According to the building block that above-mentioned batching is processed, can process hollow and solid block by the structural shape of existing building block, the cavity of its holllow building block can be processed single row of holes, double hole or many rounds according to design requirements, and shape can adopt no groove and fluted.
Claims (1)
1. waste fiber heat-preserving load-bearing concrete segment is characterized in that the technical scheme that adopts is:
I. original material is: cement, sand, stone, haydite, flyash, slag, waste fiber, glass bead, water reducer; Initial formulation is: cement 510kg, medium sand 80kg, stone 500kg; Haydite is by 100%, 80%, 60% replacement stone of quality; Flyash and slag are by the 10%-20% replacement cement of quality, and wc 1: 0.3, waste and old fibre account for ready mixed concrete volume 0.5%-2%; Glass bead accounts for ready mixed concrete volume 100%, water reducer: account for ready mixed concrete quality 2%;
II. proportion scheme is following:
Cement 298-404kg, sand 80kg, stone 0-200kg; Haydite 500-300kg, slag 53-106kg, flyash 53-106kg; Wc 1: 0.3; Waste and old fibre: fiber volume accounts for ready mixed concrete TV 0.5%-2%, lagging material: glass bead accounts for ready mixed concrete TV 120%, water reducer: account for ready mixed concrete quality 2%;
III. building block manufacture craft
The building block size and dimension does not have particular requirement and restriction, can be according to the practical situation design Selection, and solid block master ga(u)ge lattice are 240mm * 115mm * 90mm, holllow building block master ga(u)ge lattice are 390mm * 190mm * 190mm; The manufacture craft of waste fiber heat-preserving load-bearing concrete segment is: levigate, batching, stirring, cast, cutting and maintenance; Wherein, the feeding sequence of batching is: at first cement, flyash, slag and portion water are dropped in the stirrer, stirred 0.5-1 minute; Again haydite, sand, stone are dropped in the stirrer; Stirred 0.5-1 minute, and at last glass bead, waste fiber, water reducer and surplus water were dropped into stirrer, stir and got final product in 1.5-2 minute; Concrete sample after the form removal is placed on temperature and is (20 ± 3) ℃, and relative humidity is the indoor maintenance of the normal curing more than 95%, and each interval is 10～20mm, makes an experiment behind the maintenance 28d, and ultimate compression strength is 15-41.5MP, and thermal conductivity is 0.15-1.5W/ (mk).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100844783A CN102731023A (en) | 2011-03-29 | 2011-03-29 | Method for manufacturing waste fiber insulation load-bearing concrete building block |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100844783A CN102731023A (en) | 2011-03-29 | 2011-03-29 | Method for manufacturing waste fiber insulation load-bearing concrete building block |
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| Publication Number | Publication Date |
|---|---|
| CN102731023A true CN102731023A (en) | 2012-10-17 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553484A (en) * | 2013-10-12 | 2014-02-05 | 广东电白建设集团有限公司 | Glass bead thermal insulation concrete and construction process |
| CN104058657A (en) * | 2014-05-30 | 2014-09-24 | 蚌埠华东石膏有限公司 | High-strength thermal-insulation concrete and preparation method thereof |
| CN104230219A (en) * | 2013-06-17 | 2014-12-24 | 李聪 | Novel efficient energy-saving fireproof heat insulation concrete and preparation method thereof |
| CN104961417A (en) * | 2015-07-01 | 2015-10-07 | 盐城工学院 | Regenerated light aggregate heat preservation concrete and manufacturing method thereof |
| CN107447907A (en) * | 2017-07-15 | 2017-12-08 | 沈阳理工大学 | The self-insulation hollow block of calcium silicate board as separation rib and preparation method thereof |
| CN108395164A (en) * | 2018-05-17 | 2018-08-14 | 吉林建筑大学 | A kind of building energy-saving heat-insulating material and preparation method thereof |
| CN108424100A (en) * | 2018-05-22 | 2018-08-21 | 四川省劲腾环保建材有限公司 | A kind of solid concrete brick and preparation method thereof |
-
2011
- 2011-03-29 CN CN2011100844783A patent/CN102731023A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104230219A (en) * | 2013-06-17 | 2014-12-24 | 李聪 | Novel efficient energy-saving fireproof heat insulation concrete and preparation method thereof |
| CN103553484A (en) * | 2013-10-12 | 2014-02-05 | 广东电白建设集团有限公司 | Glass bead thermal insulation concrete and construction process |
| CN103553484B (en) * | 2013-10-12 | 2016-05-04 | 广东电白建设集团有限公司 | Heat-insulated concrete of kervit micro-beads and construction technology |
| CN104058657A (en) * | 2014-05-30 | 2014-09-24 | 蚌埠华东石膏有限公司 | High-strength thermal-insulation concrete and preparation method thereof |
| CN104961417A (en) * | 2015-07-01 | 2015-10-07 | 盐城工学院 | Regenerated light aggregate heat preservation concrete and manufacturing method thereof |
| CN107447907A (en) * | 2017-07-15 | 2017-12-08 | 沈阳理工大学 | The self-insulation hollow block of calcium silicate board as separation rib and preparation method thereof |
| CN108395164A (en) * | 2018-05-17 | 2018-08-14 | 吉林建筑大学 | A kind of building energy-saving heat-insulating material and preparation method thereof |
| CN108424100A (en) * | 2018-05-22 | 2018-08-21 | 四川省劲腾环保建材有限公司 | A kind of solid concrete brick and preparation method thereof |
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Application publication date: 20121017 |