CN115215601B - Soundproof mortar containing ternary composite fibers and application thereof - Google Patents
Soundproof mortar containing ternary composite fibers and application thereof Download PDFInfo
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- CN115215601B CN115215601B CN202211121436.7A CN202211121436A CN115215601B CN 115215601 B CN115215601 B CN 115215601B CN 202211121436 A CN202211121436 A CN 202211121436A CN 115215601 B CN115215601 B CN 115215601B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/52—Sound-insulating materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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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- 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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a sound insulation mortar containing ternary composite fibers and application thereof, and relates to the field of building materials. The sound insulation mortar containing the ternary composite fibers comprises the following components in parts by weight: 250-350 parts of cement, 250-350 parts of river sand, 200-300 parts of limestone powder, 100-140 parts of thermosetting resin, 28-50 parts of ternary composite fiber, 0.3-0.5 part of cross-linking agent, 0.2-0.3 part of gas former and 0-5 parts of auxiliary agent, wherein the ternary composite fiber comprises glass fiber, polypropylene fiber and wood fiber. According to the invention, the components such as ternary composite fiber, thermosetting resin, gas-forming agent and the like are introduced into the cement mortar system to play a role together, so that not only can noise be absorbed, weakened and isolated, but also the volume density of the mortar can be effectively reduced, the porosity of the internal structure of the mortar can be increased, and the lightweight of the mortar can be realized.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to sound insulation mortar containing ternary composite fibers and application thereof.
Background
With the continuous development of society and the improvement of living standard, the urban living rate is higher and higher. Meanwhile, various noise pollutions are more and more serious, and the requirements of people on noise reduction and sound insulation and improvement of privacy and comfort of houses are increasing day by day. Therefore, it is a problem to be solved urgently to achieve an excellent sound insulation effect of a building material. In addition, the lightening of construction materials also becomes an urgent problem to be solved in the construction process of buildings. The low-density sound-insulation mortar circulating on the market mostly adopts the effect of adding expanded and vitrified micro-beads or glass micro-beads and the like to realize sound insulation and light weight, but in the construction process, the light fillers are easy to be broken by mechanical stirring, thereby seriously affecting the sound insulation effect of the mortar.
Disclosure of Invention
The invention mainly aims to provide sound insulation mortar containing ternary composite fibers and application thereof, which realize the lightening and sound insulation effects of the mortar under the condition of not adding expanded and vitrified micro-beads or glass micro-bead light fillers.
In order to achieve the purpose, the invention provides a sound insulation mortar containing ternary composite fibers, which comprises the following components in parts by weight: 250-350 parts of cement, 250-350 parts of river sand, 200-300 parts of limestone powder, 100-140 parts of thermosetting resin, 28-50 parts of ternary composite fiber, 0.3-0.5 part of cross-linking agent, 0.2-0.3 part of gas former and 0-5 parts of auxiliary agent, wherein the ternary composite fiber comprises glass fiber, polypropylene fiber and wood fiber.
Glass fiber is a fiber having good insulation properties, strong heat resistance, and good sound insulation properties, but glass fiber has poor abrasion resistance. The polypropylene fiber has high resistivity, small heat conductivity coefficient, good toughness and high wear resistance, but has poor heat resistance. In the technical scheme of the invention, the glass fiber, the polypropylene fiber and the wood fiber are compounded for use, firstly, the performances of the glass fiber and the polypropylene fiber can be complemented; secondly, the wood fiber can form a three-dimensional net structure after being mixed with water in the mortar, and the internal moisture can be rapidly transmitted to the surface and the interface of the mortar due to the capillary action of the fiber structure of the wood fiber, so that the internal moisture of the mortar is uniformly distributed, and the stability of a system is improved; meanwhile, after the mortar is cured and dried, a fine hollow pipeline structure is formed after the water in the wood fiber is lost, and the fine hollow pipeline structure has a certain effect of isolating sound waves; thirdly, the glass fiber, the polypropylene fiber and the wood fiber are low in density and easy to float on the liquid surface, and can be adsorbed by the cross-linking agent to form a communicated pore structure, when the sound wave passes through, the sound wave penetrates into the fiber along the pores, and the sound wave and the fiber generate friction to convert sound energy into heat energy, so that the effects of vibration reduction and absorption are achieved on the sound wave, and the thermosetting resin in the system can effectively reduce and prevent the heat energy from being further conducted towards the inner side. In addition, the gas former added in the application can be continuously decomposed to generate nitrogen and a small amount of carbon monoxide in the cement hydration process, and a plurality of micro air holes with hollow structures are formed in the internal structure of the mortar. When the sound wave passes through the air holes of the hollow structure, the transmission medium in the air holes is converted, the sound wave transmission is weakened due to the buffer effect, and the noise is effectively isolated. The comprehensive effect of the above-mentioned components of this application makes the mortar have and absorbs the effect that weakens the isolation to the noise to reach syllable-dividing effect. The volume density of the thermosetting resin is much smaller than that of cement sand, and the volume density of the mortar can be effectively reduced by adding proper amounts of epoxy resin and phenolic resin; meanwhile, due to the generation of micro air holes, the porosity of the internal structure of the mortar is increased, the compactness of the mortar is reduced, the density of the mortar is effectively reduced, and the weight of the mortar is reduced.
In a preferred embodiment of the soundproof mortar containing the ternary composite fiber according to the present invention, the ternary composite fiber contains 15 to 25 parts of glass fiber, 5 to 15 parts of polypropylene fiber, and 8 to 10 parts of wood fiber.
Through a large number of experiments, the inventor finds that the adding amount of each component of the glass fiber, the polypropylene fiber and the wood fiber has great influence on the density and the sound insulation effect of the mortar. When the three components of the glass fiber, the polypropylene fiber and the wood fiber are in the weight ratio, the correspondingly prepared mortar is lighter, and the sound insulation effect is good.
As a preferred embodiment of the soundproof mortar containing the ternary complex fiber according to the present invention, the thermosetting resin includes epoxy resin and phenol resin.
In a preferred embodiment of the soundproof mortar containing the ternary composite fiber according to the present invention, the thermosetting resin contains 70 to 90 parts of the epoxy resin and 30 to 50 parts of the phenolic resin.
The epoxy resin and the phenolic resin are both thermosetting resins, the volume density of the epoxy resin and the phenolic resin is much smaller than that of cement sand, and the volume density of the mortar can be effectively reduced by adding the epoxy resin and the phenolic resin with proper amounts.
In a preferred embodiment of the soundproof mortar containing the ternary composite fiber according to the present invention, the crosslinking agent is at least one of aluminum oxide and polyacrylamide.
The cross-linking agent has a high-charge polymeric ring chain shape in molecules, has high electric neutralization and bridging effects on colloids and particles in water, and has an excellent bridging adsorption effect after hydrolysis in water.
In a preferred embodiment of the sound-insulating mortar containing a ternary composite fiber according to the present invention, the gas-generating agent is at least one of an azo compound, a sulfonyl hydrazide compound, a nitroso compound, and hydrogen peroxide.
As a preferred embodiment of the soundproof mortar containing the ternary composite fiber according to the present invention, the auxiliary agent includes at least one of cellulose ether, starch ether and dispersible latex powder.
As a preferred embodiment of the soundproof mortar containing the ternary composite fiber according to the invention, the cellulose ether is at least one of methyl hydroxypropyl cellulose ether, methyl hydroxyethyl cellulose ether, and methyl cellulose ether; the starch ether is at least one of hydroxyalkyl starch ether, carboxymethyl starch ether and cationic starch.
As a preferred embodiment of the soundproof mortar containing the ternary composite fibers, the dispersible latex powder is at least one of vinyl acetate-ethylene copolymer rubber powder, ethylene-vinyl chloride-vinyl metasilicate ternary copolymer rubber powder, vinyl acetate-ethylene-higher fatty acid vinyl ester ternary copolymer rubber powder, vinyl acetate-higher fatty acid vinyl ester copolymer rubber powder, acrylic ester-styrene copolymer rubber powder, vinyl acetate-acrylic ester-higher fatty acid vinyl ester ternary copolymer rubber powder, vinyl acetate homopolymerization rubber powder and styrene-butadiene copolymer rubber powder.
In a second aspect, the invention also provides a use method of the sound-proof mortar containing the ternary composite fibers, wherein the sound-proof mortar containing the ternary composite fibers is uniformly mixed with water and then is constructed.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the technical scheme, the ternary composite fiber, the thermosetting resin, the gas generating agent and other components are introduced into the cement mortar system to play a role together, so that noise can be absorbed, weakened and isolated, the volume density of the mortar can be effectively reduced, the porosity of the internal structure of the mortar is increased, and the lightweight of the mortar is realized;
(2) The ternary composite fiber and the thermosetting resin adopted in the invention can be derived from the components of the recovered waste left after the printed circuit board is crushed and the precious metal is recovered, and the effect of the invention is realized by using the recovered crushed powder of the printed circuit board as the filler, thus having the important significance of environmental protection, energy saving and resource recycling.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to the following specific examples.
The raw material conditions used in the examples of the present invention and the comparative examples are as follows: cement: ordinary portland cement, commercially available;
a crosslinking agent: aluminum oxide, commercially available; a gas former: azo compounds, commercially available; cellulose ether: methyl hydroxypropyl cellulose ether, commercially available; dispersible latex powder: vinyl acetate-ethylene copolymer gum powder, commercially available; all the other raw material components are commercial products.
The raw material components of examples 1 to 5 and comparative examples 1 to 5 are shown in the following table 1, and the amounts of the components are in parts by weight.
TABLE 1 raw material compositions of examples 1-5 and comparative examples 1-5
Performance test method
1. Testing the bulk density, dry density, tensile bonding strength and compressive strength of the sound-insulating mortar material by referring to JGJ 70-2009 building mortar basic performance test method;
2. the sound insulation performance of the sound insulation mortar is tested according to GB/T19889.7-2005 sound insulation of acoustic buildings and building components and GB50118-2010 civil building sound insulation design specifications;
3. the thermal conductivity of the sound-insulating mortar material is tested according to GB/T10294-2008 heat-insulating material steady-state thermal resistance and relative characteristic determination heat shield method.
The results of the performance tests of examples 1 to 5 and comparative examples 1 to 5 are shown in Table 2 below.
TABLE 2 Performance test results of examples 1 to 5 and comparative examples 1 to 5
As shown in tables 1 and 2, the mortars prepared in examples 1-5 had lower density, thermal conductivity and normalized impact sound pressure levels.
Compared with the example 2, in the comparative example 1, no thermosetting resin and fiber material are added, and the density, the thermal conductivity and the normalized impact sound pressure level of the correspondingly prepared mortar are obviously higher than those of the example 2. Therefore, the introduction of the thermosetting resin and the fiber material can greatly reduce the density of the mortar, realize the lightening of the mortar, obviously reduce the heat conductivity coefficient of the mortar and realize good sound insulation effect.
Compared with the embodiment 2, the fiber material is not added in the comparative example 2, although the density, the heat conductivity coefficient and the normalized impact sound pressure level of the correspondingly prepared mortar are reduced, the reduction range is not large, the effect is mainly due to the addition of the light resin filler, but the single action effect is not obvious, and the strength reduction range is large; in comparative examples 3-5, glass fibers, polypropylene fibers, and wood fibers were absent, respectively, and the weight parts of the absent components were distributed according to the ratio of the remaining two fibers, as compared to example 2. Specifically, in comparative example 3, no glass fiber is added, and both the thermal conductivity and the normalized impact sound pressure level of the correspondingly prepared mortar are increased; compared with the prior art, the mortar prepared correspondingly has the advantages that polypropylene fibers are not added, the heat conductivity coefficient is obviously improved, the heat resistance is poor, and the tensile bonding strength is reduced; in comparative example 5, no wood fiber is added, and the correspondingly prepared mortar system has poor stability and low compressive strength and tensile bonding strength. Therefore, after the three fibers are compounded, the three fibers play a synergistic effect in a mixed system, so that the correspondingly prepared mortar shows good comprehensive performance. In the absence of any fiber, the performance of the mortar is greatly affected.
The raw material components of examples 2, 6-7 and comparative examples 6-7 are shown in the following table 3 by taking example 2 as a comparison basis, and the amounts of the components are calculated according to parts by weight.
TABLE 3 raw material compositions of examples 2, 6 to 7, comparative examples 6 to 7
The results of the performance tests of examples 2, 6 to 7 and comparative examples 6 to 7 are shown in Table 4 below.
TABLE 4 Performance test results of examples 2, 6 to 7, and comparative examples 6 to 7
As shown in tables 3 and 4, the thermosetting resins of examples 2, 6 and 7 have a suitable content, the mortar density is significantly reduced, and the differences in performance indexes such as compressive strength, tensile bond strength, thermal conductivity and normalized impact sound pressure level are not large. When the mixing amount proportion of the thermosetting resin is not appropriate, various performance indexes can not achieve the expected effect, the density is not obviously reduced when the mixing amount is too low, and the heat conductivity coefficient and the normalized impact sound pressure level are not obviously improved. The density of the mortar is obviously reduced when the mixing amount is too high, but the compressive strength is obviously reduced, so that the practical use of the mortar is influenced.
The raw material components of examples 2, 8-10 and comparative examples 8-10 are shown in the following table 5 by taking example 2 as a comparison basis, and the amounts of the components are calculated according to parts by weight.
TABLE 5 raw material compositions of examples 2, 8 to 10 and comparative examples 8 to 10
The results of the performance tests of examples 2, 8 to 10, and comparative examples 8 to 10 are shown in Table 6 below.
TABLE 6 Performance test results of examples 2, 8 to 10, comparative examples 8 to 10
As shown in tables 5 and 6, the introduction of a proper amount of the gas former can reduce the dry density of the mortar, the compressive strength is also reduced, but the gas former cannot be excessive, otherwise, the compressive strength of the mortar is seriously reduced, the introduction of the cross-linking agent improves the tensile bonding strength and the compressive strength of the mortar to a certain extent, the ternary composite fibers are connected in a better bridging manner in a mortar system, and the heat conductivity coefficient and the normalized impact sound pressure level of the mortar are effectively reduced.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. The sound insulation mortar containing the ternary composite fibers is characterized by comprising the following components in parts by weight: 250-350 parts of cement, 250-350 parts of river sand, 200-300 parts of limestone powder, 100-140 parts of thermosetting resin, 28-50 parts of ternary composite fiber, 0.3-0.5 part of cross-linking agent, 0.2-0.3 part of gas former and 0-5 parts of auxiliary agent, wherein the ternary composite fiber comprises 15-25 parts of glass fiber, 5-15 parts of polypropylene fiber and 8-10 parts of wood fiber, the cross-linking agent is at least one of aluminum oxide and polyacrylamide, and the auxiliary agent comprises at least one of cellulose ether, starch ether and dispersible latex powder.
2. A sound-proofing mortar containing ternary composite fibers according to claim 1, wherein said thermosetting resin includes epoxy resin and phenolic resin.
3. The soundproof mortar containing ternary complex fiber according to claim 2, wherein the thermosetting resin comprises 70 to 90 parts of epoxy resin and 30 to 50 parts of phenol resin.
4. The acoustic mortar containing ternary composite fibers according to claim 1, wherein the gas generating agent is at least one of an azo compound, a sulfonyl hydrazide compound, a nitroso compound and hydrogen peroxide.
5. The acoustical mortar containing a ternary composite fiber of claim 1, wherein the cellulose ether is at least one of methyl hydroxypropyl cellulose ether, methyl hydroxyethyl cellulose ether, and methyl cellulose ether; the starch ether is at least one of hydroxyalkyl starch ether, carboxymethyl starch ether and cationic starch.
6. The soundproof mortar containing the ternary complex fiber as set forth in claim 1, wherein the dispersible latex powder is at least one of vinyl acetate-ethylene copolymer rubber powder, ethylene-vinyl chloride-vinyl metasilicate ternary copolymer rubber powder, vinyl acetate-ethylene-higher fatty acid vinyl ester ternary copolymer rubber powder, vinyl acetate-higher fatty acid vinyl ester copolymer rubber powder, acrylic ester-styrene copolymer rubber powder, vinyl acetate-acrylic ester-higher fatty acid vinyl ester ternary copolymer rubber powder, vinyl acetate homopolymer rubber powder, and styrene-butadiene copolymer rubber powder.
7. A method for using a ternary composite fiber-containing sound-insulating mortar, characterized in that the ternary composite fiber-containing sound-insulating mortar of any one of claims 1 to 6 is applied after being mixed with water uniformly.
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