CN113149529A - Bamboo aggregate and modified straw fiber hybrid reinforced concrete sound-absorbing heat-insulating decorative multifunctional board - Google Patents

Bamboo aggregate and modified straw fiber hybrid reinforced concrete sound-absorbing heat-insulating decorative multifunctional board Download PDF

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Publication number
CN113149529A
CN113149529A CN202110473968.6A CN202110473968A CN113149529A CN 113149529 A CN113149529 A CN 113149529A CN 202110473968 A CN202110473968 A CN 202110473968A CN 113149529 A CN113149529 A CN 113149529A
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China
Prior art keywords
bamboo
modified straw
straw fiber
concrete
aggregate
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CN202110473968.6A
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Chinese (zh)
Inventor
孙学光
黄挺
孙君海
朱旭东
李治均
徐金
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Wuxi Beitong Environmental Protection New Material Co ltd
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Wuxi Beitong Environmental Protection New Material Co ltd
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Priority to CN202110473968.6A priority Critical patent/CN113149529A/en
Publication of CN113149529A publication Critical patent/CN113149529A/en
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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
    • C04B18/00Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04Waste materials; Refuse
    • C04B18/18Waste materials; Refuse organic
    • C04B18/24Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
    • C04B18/26Wood, e.g. sawdust, wood shavings
    • 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
    • C04B20/00Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02Treatment
    • C04B20/023Chemical treatment
    • 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
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20Resistance against chemical, physical or biological attack
    • 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
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/52Sound-insulating materials
    • 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
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a bamboo aggregate and modified straw fiber hybrid reinforced concrete sound-absorbing heat-insulating decorative multifunctional board which is prepared from concrete containing two plant materials, namely bamboo aggregate and modified straw fiber. The concrete comprises, by mass, 12.4-13.8 parts of bamboo aggregate, 5.8-8.2 parts of modified straw fiber, 19.6-30.5 parts of cement, 15.0-23.2 parts of quartz sand, 0.4-0.6 part of water reducing agent, 0.6-0.9 part of concrete reinforcing agent and 7.8-12.2 parts of neutral water. Wherein the optimal blending mass ratio of the bamboo aggregate to the modified straw fiber is (0.618-0.682): (0.318-0.382). The concrete multifunctional plate is prepared by mixing the components in proportion and pouring at one time, has good effects of sound absorption, sound insulation, heat preservation, heat insulation, corrosion resistance and the like, and can be applied to the decoration of building walls needing heat preservation and noise reduction.

Description

Bamboo aggregate and modified straw fiber hybrid reinforced concrete sound-absorbing heat-insulating decorative multifunctional board
Technical Field
The invention relates to the technical field of building materials, in particular to a bamboo aggregate and modified straw fiber hybrid reinforced concrete sound-absorbing heat-insulating decorative multifunctional board.
Background
Along with social development, the quality of life of people is greatly improved, the environment is protected, and people are well acquainted with sustainable development. After the building main body is built, people have more and more great demand on building wall decoration. At present, common wall decoration plates on the market are mostly made of materials such as plastics, stones, wood, concrete and the like, and have excellent building energy-saving effect. For example, patent No. CN 106587785B discloses a concrete decorative plate and a preparation method thereof, which play a role in adjusting indoor temperature and keeping the indoor temperature constant.
In order to add a sound absorption function to a concrete decorative plate on the basis of heat preservation, it is conceivable to add a plant material to concrete. Plant materials are used as raw materials for preparing the decorative plate and are more environment-friendly, but when the plant fibers or the plant aggregates are doped into concrete, the plant fibers and the cement matrix material cannot be effectively bonded into a whole due to the problem of poor interface compatibility.
Disclosure of Invention
Based on the problems, the invention provides a concrete sound-absorbing heat-insulating decorative multifunctional board reinforced by mixing bamboo aggregate and modified straw fiber, which has good sound-absorbing, sound-insulating, heat-insulating and corrosion-resisting effects. Therefore, the invention adopts the following technical scheme:
a bamboo aggregate and modified straw fiber hybrid reinforced concrete sound-absorbing heat-insulating decorative multifunctional board is prepared from concrete containing two plant materials, namely bamboo aggregate and modified straw fiber.
The outer surface of the concrete can be sprayed with coatings of various colors, so that the effect of attractive decoration is achieved.
The concrete comprises, by mass, 12.4-13.8 parts of bamboo aggregate, 5.8-8.2 parts of modified straw fiber, 19.6-30.5 parts of cement, 15.0-23.2 parts of quartz sand, 0.4-0.6 part of water reducing agent, 0.6-0.9 part of concrete reinforcing agent and 7.8-12.2 parts of neutral water.
The bamboo bone material is obtained by boiling bamboo particles in water and then treating the bamboo particles with a sodium alginate solution and a calcium chloride solution. The treatment is soaking or stirring.
Preferably, the bamboo particles obtained by cutting moso bamboos are boiled, washed with water for 1-2 times, soaked in a sodium alginate solution of 2-6 g/L for 30-60 minutes and a calcium chloride solution of 10-15 g/L for 90-120 minutes, and finally dried to obtain the bamboo aggregate.
The bamboo aggregate is granular, and the particle size is as follows: the length is 10-20 mm, the width is 2-10 mm, and the thickness is 1-5 mm. And the surface has a plurality of pores, and has good sound absorption effect. (through detection, the average sound absorption coefficient (100 Hz-6300 Hz) of the bamboo aggregate is 0.97. the sound absorption effect is that the bamboo aggregate is more than the imported wood aggregate in France and more than the traditional polyurethane sponge).
The water content of the bamboo bone material is 6-14%.
The modified straw fiber refers to rice straw, wheat straw or corn straw fiber treated by a sodium hydroxide solution. The treatment is soaking or stirring.
Preferably, the modified rice straw, wheat straw or corn straw fiber is obtained by soaking rice straw, wheat straw or corn straw in a sodium hydroxide solution with the mass concentration of 2-6% for 12 hours, washing with water for 2-3 times after soaking, and finally drying.
The modified straw fiber is filamentous and has the length of 20-30 mm, and the modified straw fiber material has the characteristics of light weight, low heat conductivity coefficient and the like, so that the modified straw fiber material is a good energy-saving heat-insulating material.
The water content of the modified straw fiber is 8-16%.
Furthermore, after the bamboo aggregate and the modified straw fiber are subjected to the modification treatment, the interface compatibility of the bamboo aggregate, the modified straw fiber and the cement matrix material is well improved, so that the bamboo aggregate, the modified straw fiber and the cement mortar can be effectively bonded into a whole. Meanwhile, after modification treatment, the surface of the plant material is equivalently formed into a film, so that the contact with the external environment is isolated, and the material has the corrosion resistance effect.
Further, the blending mass ratio of the bamboo aggregate to the modified straw fiber is (0.618-0.682): (0.318-0.382).
The multifunctional concrete sound-absorbing heat-insulating decorative board prepared by adopting the blending mass ratio fully exerts the characteristics of porous sound absorption of bamboo aggregate and energy-saving heat preservation of modified straw fiber, makes up for the defects of a single material, and can embody the synergistic enhancement effect of the two materials (the respective advantages of the two materials are utilized, the optimal blending mass ratio is selected, the strength of the concrete mixed by the bamboo aggregate and the modified straw fiber is obviously enhanced, and the heat preservation and sound absorption performance of the concrete are improved).
The concrete sound-absorbing heat-insulating decorative multifunctional board is made into a thin board with the length of 500mm, the width of 500mm and the thickness of 50mm, and can be applied to the decoration of building wall surfaces needing heat insulation and noise reduction.
The invention principle of the invention is as follows:
the invention adopts two plant materials of bamboo particles and straw fibers as raw materials, and fully exerts the advantages of cheap and easily obtained two materials, simple preparation process, convenient processing and forming, environmental protection, no toxicity and the like. At present, the research of the engineering at home and abroad on the doping of bamboo particles and straw fibers in concrete is still limited, the main reason is the problems of poor interface compatibility and the like between the bamboo particles and straw fiber organisms and cement mortar inorganic organisms, and because the concrete has strong basicity, the cement releases excessive active hydroxyl ions in the concrete in the hydration process, so that hemicellulose and lignin in the bamboo particles and the straw fibers are dissolved, and the cohesiveness and the stability of the material are influenced. The inventor finds out through long-term experiments that the problems are effectively solved by modifying two plant materials.
In the invention, the extract of the bamboo particles can be washed after the bamboo particles are boiled and washed, only the content of high lignin and cellulose in the bamboo particles is kept, the bonding strength of cement paste and a fiber matrix can be effectively improved compared with the bamboo aggregate which is not boiled and washed, and the irregular egg box type cross-linked polymer is coated on the surfaces of the bamboo particles by combining the subsequent sodium alginate soaking, calcium chloride soaking and drying treatment, so that on one hand, the roughness of the surfaces of the bamboo particles can be increased, more convex structures and reaction active sites are formed, and the bonding strength and porosity after the bamboo particles are combined with the cement paste are increased; on the other hand, the water retention of the bamboo particles can be improved, alkaline substances in cement can be isolated, the bamboo particles are prevented from being corroded, and the sound absorption effect and strength of the bamboo particles are greatly improved.
After the straw fiber is modified by a sodium hydroxide solution, a waxy layer and siliceous particles on the surface are etched and become rough and uneven, so that a large number of irregular holes are formed, meanwhile, a large number of saccharides, tannin, inorganic salt and the like are separated out, lipid compounds on the surface layer are partially hydrolyzed, the protective action of a horny layer is destroyed, the roughness of the surface of the straw fiber is obviously increased, and the interface nailing action of a cement hydration product and the straw fiber is further improved; on the other hand, as the outer cuticle layer of the straw fiber is damaged, the alkali liquor enters the plant material, so that a large amount of hemicellulose is hydrolyzed to generate monosaccharide substances dissolved in water and is separated out, and the monosaccharide substances are removed in the subsequent water washing process, thereby effectively reducing the problem that the concentration of the calcium hydroxide solution in the cement slurry cannot reach saturation due to the combination of sugar acid and calcium ions, further improving the capability of the straw fiber for isolating the alkali substances in the cement, preventing the straw fiber from being corroded, and greatly improving the stability of the material.
The invention has the beneficial effects that:
1. the raw materials of the invention are prepared by crushing natural moso bamboos and agricultural waste straws and then modifying the crushed raw materials, and the invention has the advantages of low price, easy obtaining, simple preparation process, convenient processing and forming, environmental protection, no toxicity and the like, conforms to the national industrial policy, and has large development potential and strong competitiveness.
2. According to the invention, the bamboo aggregate and the modified straw fiber are mixed, and the excellent porous sound absorption of the bamboo aggregate and the energy-saving and heat-insulating properties of the modified straw fiber are utilized, so that the advantages of the two materials can be fully exerted, the defects of a single material can be overcome, the synergistic enhancement effect of the two materials can be reflected, and the performance of the concrete mixed by the two plant materials of the bamboo aggregate and the modified straw fiber can be obviously enhanced. Meanwhile, the optimal blending mass ratio (the blending mass ratio of the bamboo aggregate to the modified straw fiber is (0.618-0.682): 0.318-0.382)) is adopted, so that the prepared multifunctional board has excellent heat preservation, heat insulation, sound absorption, sound insulation and corrosion resistance, and can replace the existing building wall concrete decorative board.
3. The invention mixes cement, quartz sand, water reducing agent, concrete intensifier, modified straw fiber and bamboo aggregate in proportion, pours and forms in one time, and sends into constant temperature and humidity three-dimensional storehouse to maintain for 24 hours, demolds, then gets the concrete sound-absorbing heat-insulating decorative multifunctional board.
Detailed Description
The multifunctional concrete sound-absorbing heat-insulating decorative board reinforced by mixing the bamboo aggregate and the modified straw fiber ensures that the multifunctional concrete sound-absorbing heat-insulating decorative board has good sound-absorbing and sound-insulating, heat-insulating and corrosion-resisting effects, and can be applied to the decoration of building walls needing heat preservation and noise reduction.
The technical scheme of the invention is further explained by combining the specific examples as follows:
general examples
A bamboo aggregate and modified straw fiber hybrid reinforced concrete sound-absorbing heat-insulating decorative multifunctional board comprises concrete in which two plant materials, namely bamboo aggregate and modified straw fiber, are hybrid. The outer surface of the concrete can be sprayed with coatings of various colors.
The concrete comprises the following raw materials in parts by mass:
the optimal blending mass ratio of the bamboo aggregate to the modified straw fiber is (0.618-0.682): (0.318-0.382).
The invention adopts the steps of mixing cement, quartz sand, a water reducing agent, a concrete reinforcing agent, neutral water, modified straw fiber and bamboo aggregate in sequence according to a proportion, pouring and forming at one time, conveying the mixture into a constant temperature and humidity three-dimensional warehouse for curing for 24 hours, and demoulding to prepare the concrete sound-absorbing heat-insulating decorative multifunctional board.
The concrete sound-absorbing heat-insulating decorative multifunctional board is made into a thin board with the length of 500mm, the width of 500mm and the thickness of 50mm, and is applied to the decoration of building walls.
Example 1
The concrete comprises the following raw materials in parts by mass:
mixing cement, quartz sand, a water reducing agent, a concrete reinforcing agent, neutral water, modified straw fiber and bamboo aggregate in sequence according to a proportion, pouring and forming at one time, conveying into a constant-temperature constant-humidity three-dimensional warehouse for curing for 24 hours, and demolding to obtain the multifunctional concrete board.
Example 2 (different from example 1 in that the concrete raw material composition does not contain bamboo aggregate)
The bamboo aggregate is an excellent sound-absorbing material due to the characteristic of porous property of the bamboo aggregate material, and meanwhile, the bamboo aggregate is equivalent to a coarse aggregate in concrete and has higher compressive strength compared with modified straw fiber.
Concrete multifunctional plate Noise reduction Coefficient of thermal conductivity Compressive strength
Example 1 14.2dB 0.13W/(m·k) 5.13MPa
Example 2 10.6dB 0.18W/(m·k) 3.78MPa
Example 3 (different from example 1 in that the concrete raw material composition does not contain modified straw fiber)
The modified straw fiber takes the crop straws as a production raw material, and has the characteristics of light weight, low heat conductivity coefficient and the like, so that the concrete board doped with the modified straw fiber has excellent heat preservation and heat insulation performance.
Concrete multifunctional plate Noise reduction Coefficient of thermal conductivity Compressive strength
Example 1 14.2dB 0.13W/(m·k) 5.13MPa
Example 3 13.2dB 0.22W/(m·k) 4.02MPa
Example 4 (different from example 1 in that the blending mass ratio of the bamboo aggregate and the modified straw fiber in the concrete raw material composition is out of the scope of claims)
The concrete comprises the following raw materials in parts by mass:
the mixing of the bamboo aggregate and the modified straw fiber material can fully play the characteristics of porous sound absorption of the bamboo aggregate and energy-saving and heat preservation of the modified straw fiber when the bamboo aggregate and the modified straw fiber material are mixed in an optimal mixing mass ratio, make up the defects of a single material, enable the bamboo aggregate and the modified straw fiber to generate a synergistic enhancement effect and obviously enhance the performance of the concrete slab. When the blending mass ratio is not appropriate, when one property is enhanced, the other property is affected, and the synergistic enhancement effect is not achieved.
Concrete multifunctional plate Noise reduction Coefficient of thermal conductivity Compressive strength
Example 1 14.2dB 0.13W/(m·k) 5.13MPa
Example 2 10.6dB 0.18W/(m·k) 3.78MPa
Example 3 13.2dB 0.22W/(m·k) 4.02MPa
Example 4 12.6dB 0.20W/(m·k) 4.18MPa
The above technical solutions are preferred embodiments, and are not intended to limit the technical solutions of the present invention, and it should be understood that modifications made by those skilled in the art without departing from the present invention shall fall within the protection scope of the present invention.

Claims (6)

1. The utility model provides a bamboo aggregate and modified straw fibre mix concrete sound absorption heat preservation decoration multifunctional board of reinforcing which characterized in that, multifunctional board adopt and make including bamboo aggregate and modified straw fibre's concrete, the concrete include following component by mass:
the bamboo bone material is obtained by boiling bamboo particles in water and then treating the bamboo particles with a sodium alginate solution and a calcium chloride solution;
the modified straw fiber is rice straw, wheat straw or corn straw fiber treated by a sodium hydroxide solution;
the blending mass ratio of the bamboo aggregate to the modified straw fiber is (0.618-0.682): (0.318-0.382).
2. The multifunctional concrete sound-absorbing, heat-insulating and decorative board reinforced by mixing bamboo aggregate and modified straw fiber according to claim 1, wherein the particle size of the bamboo aggregate is as follows: the length is 10-20 mm, the width is 2-10 mm, and the thickness is 1-5 mm.
3. The multifunctional concrete sound-absorbing, heat-insulating and decorative board reinforced by mixing bamboo aggregate and modified straw fiber according to claim 1, wherein the moisture content of the bamboo aggregate is 6-14%.
4. The multifunctional concrete sound-absorbing, heat-insulating and decorative board reinforced by mixing bamboo aggregate and modified straw fiber according to claim 1, wherein the length of the modified straw fiber is 20-30 mm.
5. The multifunctional concrete sound-absorbing, heat-insulating and decorative board reinforced by mixing bamboo bones and modified straw fibers according to claim 1, wherein the moisture content of the modified straw fibers is 8-16%.
6. The multifunctional sound-absorbing, heat-insulating and decorative concrete board reinforced by mixing bamboo aggregate and modified straw fiber according to claim 1 is used for wall decoration of buildings needing heat insulation and noise reduction.
CN202110473968.6A 2021-04-29 2021-04-29 Bamboo aggregate and modified straw fiber hybrid reinforced concrete sound-absorbing heat-insulating decorative multifunctional board Pending CN113149529A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113548860A (en) * 2021-08-24 2021-10-26 无锡贝通环保新材料有限公司 Low-carbon energy-saving noise-reducing light water permeable brick made of bamboo aggregate concrete

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CN111892346A (en) * 2020-04-26 2020-11-06 东北电力大学 Environment-friendly modified straw fiber regenerated fine aggregate cement-based composite material and preparation method thereof
CN112342947A (en) * 2020-11-05 2021-02-09 无锡贝通环保新材料有限公司 Insert plate type sound barrier filled with modified bamboo aggregate

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Publication number Priority date Publication date Assignee Title
AR031102A1 (en) * 2001-04-04 2003-09-10 Armstrong World Ind Inc METHOD AND APPLIANCE TO PRODUCE AN INORGANIC FOAM STRUCTURE TO BE USED AS A DURABLE ACOUSTIC PANEL
CN106630800A (en) * 2016-12-21 2017-05-10 武汉市木兰之春环保科技有限公司 Biological environment-friendly walling material and preparation method thereof
CN108046734A (en) * 2018-01-24 2018-05-18 吉林省圣翔建材集团有限公司 Crop branch fiber high-performance fire-resistant decorative panel and preparation method thereof
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CN108546047A (en) * 2018-05-30 2018-09-18 广西亿赛建设工程有限公司 A kind of cement plant fiber acoustic board of solid waste regeneration and preparation method thereof
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CN112342947A (en) * 2020-11-05 2021-02-09 无锡贝通环保新材料有限公司 Insert plate type sound barrier filled with modified bamboo aggregate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113548860A (en) * 2021-08-24 2021-10-26 无锡贝通环保新材料有限公司 Low-carbon energy-saving noise-reducing light water permeable brick made of bamboo aggregate concrete

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