CN111635191A - Sound insulation mortar with excellent tensile and compressive properties and preparation method thereof - Google Patents

Sound insulation mortar with excellent tensile and compressive properties and preparation method thereof Download PDF

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Publication number
CN111635191A
CN111635191A CN202010464326.5A CN202010464326A CN111635191A CN 111635191 A CN111635191 A CN 111635191A CN 202010464326 A CN202010464326 A CN 202010464326A CN 111635191 A CN111635191 A CN 111635191A
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China
Prior art keywords
parts
powder
mixing
mortar
fiber
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CN202010464326.5A
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张炜
黄宁宁
欧利平
阮家铭
林震
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Guangdong Fute New Materials Technology Co ltd
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Guangdong Fute New Materials Technology Co ltd
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Priority to CN202010464326.5A priority Critical patent/CN111635191A/en
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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
    • C04B28/04—Portland cements
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/022—Carbon
    • C04B14/024—Graphite
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/10—Clay
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/10—Clay
    • C04B14/104—Bentonite, e.g. montmorillonite
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/20—Mica; Vermiculite
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/22—Glass ; Devitrified glass
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/26—Carbonates
    • C04B14/28—Carbonates of calcium
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/30—Oxides other than silica
    • C04B14/305—Titanium oxide, e.g. titanates
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/36—Inorganic materials not provided for in groups C04B14/022 and C04B14/04 - C04B14/34
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/36—Inorganic materials not provided for in groups C04B14/022 and C04B14/04 - C04B14/34
    • C04B14/368—Baryte
    • 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
    • C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B16/04—Macromolecular compounds
    • C04B16/06—Macromolecular compounds fibrous
    • C04B16/0675—Macromolecular compounds fibrous from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B16/0683—Polyesters, e.g. polylactides
    • 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
    • C04B18/00—Use 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
    • C04B18/04—Waste materials; Refuse
    • C04B18/18—Waste materials; Refuse organic
    • C04B18/20—Waste materials; Refuse organic from macromolecular compounds
    • C04B18/22—Rubber, e.g. ground waste tires
    • 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
    • C04B20/00—Use 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
    • C04B20/02—Treatment
    • C04B20/023—Chemical treatment
    • 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
    • C04B2111/34—Non-shrinking or non-cracking materials
    • C04B2111/343—Crack resistant 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
    • 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
    • C04B2201/50—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

Abstract

The invention discloses sound insulation mortar with excellent tensile and compressive properties, which comprises the following components in percentage by weight: 60-80 parts of Portland cement; 20-30 parts of fine sand; 15-20 parts of sierozem powder; 15-20 parts of vitrified micro bubbles; 5-15 parts of activated rubber powder; 8-12 parts of redispersible latex powder; 8-15 parts of clay and 8-12 parts of bentonite; 3-5 parts of cellulose ether; 3-5 parts of damping filler; 5-10 parts of porous fiber. The invention combines the porous fiber and the activated rubber powder through reaction, and the rubber powder is distributed on the surface of the porous fiber. The surface of the porous fiber is provided with the rubber, the anti-cracking and tensile properties of the fiber are further improved by the rubber, the tensile anti-cracking property of the mortar can be obviously improved by the rubber, and the tensile anti-cracking effect and the anti-cracking strength of the whole mortar can be obviously improved by the combination of the porous fiber and the rubber. The sound-absorbing and sound-insulating composite material has a better sound volume absorption effect by utilizing the porous density structure of the porous fibers and the vitrified micro bubbles, and has a good sound-absorbing and sound-insulating effect by matching with the damping filler.

Description

Sound insulation mortar with excellent tensile and compressive properties and preparation method thereof
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to sound insulation mortar with excellent tensile and compressive properties and a preparation method thereof.
Background
In the existing building work, mortar is used for masonry and plastering engineering, and is a building material with a wide application range and a wide application area. The sound insulation performance of the individual floor slab as a building component for separating different households has a very important influence on the neighborhood relationship. Generally, the air sound insulation quantity of a reinforced concrete floor slab with the thickness of 120mm is 48-50 dB. And the surface layer material on the floor slab further improves the air sound and sound insulation performance of the floor, and can well meet the relevant requirements in the civil building sound insulation design specification GBJ 118-1988. However, the impact sound pressure level of the floor is usually above 80dB, far from the requirement. Meanwhile, people put forward higher requirements on privacy of living environment such as sound insulation effect, and the existing mortar lacks effective vibration reduction and sound insulation performance. CN110655366A discloses sound insulation mortar and a preparation method thereof, wherein the sound insulation mortar comprises the following raw materials in parts by weight: portland cement or ordinary Portland cement, 400-mesh ash calcium with the fineness of 325-50 meshes, 40-70-mesh aggregate II, cork particles, rubber powder, cellulose ether, fibers, a water reducing agent and tap water, wherein the preparation method comprises the following steps: the cement, the ash calcium, the first aggregate, the second aggregate, the cork particles, the rubber powder, the cellulose ether, the fibers and the water reducing agent are sequentially added into a cone-shaped mixer or a forced concrete mixer to be mixed into dry powder, and the dry powder is added into the mixer and mixed on site, wherein the weight parts of the cement, the ash calcium, the first aggregate, the second aggregate, the cellulose ether, the fibers and the water reducing agent are 35 to 40 parts, 35 to 45 parts, 15 to 25 parts, 25 to 30 parts, 3 to 8 parts, 2 to 8 parts, 1 to 3 parts and 0.3 to 0.. The cork particles in the mortar formula lack the adsorption effect on noise, and the whole mortar has poor sound insulation and low physical strength.
Therefore, the research on the sound insulation mortar with good sound insulation effect and excellent tensile compression resistance has great practical significance and wide market prospect.
Disclosure of Invention
The invention aims to provide the sound insulation mortar with excellent tensile and compressive properties, aiming at the defects in the prior art, and the mortar has the advantages of better sound absorption, good sound insulation effect and high mechanical strength.
In order to achieve the purpose, the invention adopts the following technical scheme:
the sound insulation mortar with excellent tensile and compressive properties comprises the following raw materials in parts by weight:
60-80 parts of Portland cement; 20-30 parts of fine sand; 15-20 parts of sierozem powder; 15-20 parts of vitrified micro bubbles; 5-15 parts of activated rubber powder; 8-12 parts of redispersible latex powder; 8-15 parts of clay and 8-12 parts of bentonite; 3-5 parts of cellulose ether; 3-5 parts of damping filler; 5-10 parts of porous fiber;
preparing the porous fiber: selecting one or more than two of polyester fiber, polyamide fiber and polypropylene fiber; mixing the selected fiber and xylene according to a mass ratio of 1: 3-5, mixing, soaking and filtering to obtain pretreated fibers, and washing the pretreated fibers for 6-9 times by using ethanol and propylene glycol to obtain porous fibers;
the preparation method of the sound insulation mortar comprises the following steps:
s1, crushing waste rubber powder to 80-100 meshes, activating by low-temperature plasma, and treating by using a KH570 silane coupling agent aqueous solution to obtain activated rubber powder;
s2, soaking the porous fiber in an ethanol solution, adding activated rubber powder, heating to 50-70 ℃, stirring for reaction for 3-5 hours, and filtering to obtain rubber modified porous fiber;
s3, firstly, uniformly mixing the portland cement, the fine sand, the vitrified micro bubbles and the sierozem powder, secondly, adding the clay and the bentonite, uniformly mixing, secondly, adding the rubber modified porous fiber, uniformly mixing, and finally, adding the redispersible latex powder, the cellulose ether and the damping filler, and uniformly mixing.
According to the mortar, bentonite is utilized on the basis of clay in the formula, the bentonite has a lamellar structure and the characteristic that the bentonite can swell and disperse into colloidal clay in water, so that the adhesion is effectively improved, the hole tightness of the mortar is lower, the sealing effect of the mortar is further improved, and the volume is blocked; and damping filler, vitrified micro bubbles and porous fiber are added in the auxiliary materials, a better sound volume adsorption effect is achieved by utilizing the porous density structure of the porous fiber and the vitrified micro bubbles, and a good sound absorption and sound insulation effect is achieved by matching the damping filler.
In the present invention, the porous fiber is reactively bonded with the activated rubber powder, and the rubber powder is distributed on the surface of the porous fiber. After being added into the mortar, the porous fiber can be used as a bridge to connect all substances in the mortar together, so that the cohesive force of the product is improved, and the tensile and compressive strength and the crack resistance of the product are improved. Secondly, the surface of the porous fiber is provided with rubber, the rubber further improves the crack resistance and tensile property of the fiber, the rubber can also obviously improve the tensile crack resistance of the mortar, and the combination of the porous fiber and the rubber can obviously improve the tensile compression resistance and crack resistance strength of the whole mortar. In addition, the dispersibility of the rubber powder in the cement matrix is poor, and the rubber powder is combined with the porous fiber, so that the dispersibility of the rubber powder in the mortar is improved.
The re-dispersible emulsion powder can be quickly re-dispersed to form emulsion after contacting with water, and has the same property with the initial emulsion, namely, a film can be formed after water is evaporated, and the film has high flexibility, high weather resistance and high adhesion to various base materials. Therefore, the redispersible latex powder can improve the flexibility, deformability, compressive strength, breaking strength, wear resistance, toughness and cohesiveness of the mortar.
Preferably, the sound insulation mortar with excellent tensile and compressive properties is prepared from the following raw materials in parts by weight: 60-80 parts of Portland cement; 20-30 parts of fine sand with the particle size of 0.5-1.0 mm; 15-20 parts of sierozem powder; 15-20 parts of vitrified micro bubbles; 5-15 parts of activated rubber powder; 8-12 parts of redispersible latex powder; 8-15 parts of clay and 8-12 parts of bentonite; 3-5 parts of cellulose ether; 3-5 parts of damping filler; 5-10 parts of porous fiber. The raw materials are obtained by long-term experimental adjustment of the inventor through component selection and content proportion, and the prepared sound insulation mortar with excellent tensile and compressive properties can better adsorb sound volume, and is good in sound insulation effect and high in mechanical strength.
Further preferably, the sound insulation mortar with excellent tensile and compressive properties is prepared from the following raw materials in parts by weight: 70 parts of Portland cement; 25 parts of fine sand with the particle size of 0.5-1.0 mm; 18 parts of sierozem powder; 16 parts of vitrified micro bubbles; 10 parts of activated rubber powder; 10 parts of redispersible latex powder; 12 parts of clay and 10 parts of bentonite; 3 parts of cellulose ether; 4 parts of damping filler; and 8 parts of porous fiber. Through a plurality of tests, the inventor finds that the performance of the obtained mortar is optimal under the condition of the content of the components.
Preferably, the fineness of the sierozem powder is 350-400 meshes, the free water content is not more than 2%, and the sum content of calcium oxide and magnesium oxide is not less than 85%. The gray calcium powder has the specification selection, plays a role in bonding in mortar, and can achieve the waterproof and waterproof effects. Because the ash calcium powder and CO in the air2Formation of water-insoluble CaCO after reaction3Thereby achieving the effects of water resistance and water resistance.
Preferably, the vitrified micro bubbles have a closed pore rate of more than or equal to 97 percent, a particle size of 1.5-2.0mm and a volume weight of 150-3. The specification of the vitrified micro bubbles has good sound insulation effect when being applied to mortar.
Preferably, the redispersible latex powder is an ethylene-vinyl acetate copolymer, and the particle size is 100-150 meshes.
Preferably, the damping filler is one or more of flaky mica, graphite, calcium carbonate, barium sulfate or titanium dioxide.
Preferably, the length of the porous fiber is 2.0-3.0 mm, and the porosity is 30% -35%.
Preferably, the fibers selected for use in the present invention are polyester fibers, preferably polybutylene terephthalate.
In the present invention, preferably, S3 operates as follows:
the first step is as follows: mixing the portland cement, the fine sand, the vitrified micro bubbles and the ash calcium powder by using a mixer, wherein the temperature during mixing is 30-40 ℃, the rotating speed of a motor of the mixer is 1500-2000 r/min, the mixing time is 30-40 min, water is added or not added during the mixing process, and no obvious color value difference is required after mixing;
the second step is that: adding clay and bentonite, and mechanically mixing again at a rotating speed of 2000-2500 r/min for 40-50 min at 40-50 ℃, wherein the clay and the bentonite are added in the adding process, the weight of the added clay is not more than 1/4 of the total weight in one time, and the adding time interval is 30-45 s;
the third step: keeping the rotating speed, gradually adding the rubber modified porous fiber, mixing for 15-30 min, and keeping the temperature at 65-85 ℃ during mixing; and finally, adding the redispersible latex powder, the cellulose ether and the damping filler in sequence, and uniformly mixing.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the mortar disclosed by the invention, bentonite is utilized on the basis of clay in the formula, and the bentonite has a lamellar structure and the characteristic that the bentonite can be swelled and dispersed into colloidal clay particles in water, so that the adhesion is effectively improved, the hole tightness of the mortar is lower, the sealing effect of the mortar is further improved, and the volume is blocked.
2. According to the invention, the damping filler, the vitrified micro bubbles and the porous fiber are added in the auxiliary material, a better sound volume adsorption effect is achieved by utilizing the porous density structure of the porous fiber and the vitrified micro bubbles, and a good sound absorption and sound insulation effect is achieved by matching the damping filler.
3. The invention combines the porous fiber and the activated rubber powder through reaction, and the rubber powder is distributed on the surface of the porous fiber. The surface of the porous fiber is provided with the rubber, the anti-cracking and tensile properties of the fiber are further improved by the rubber, the tensile anti-cracking property of the mortar can be obviously improved by the rubber, and the tensile anti-cracking effect and the anti-cracking strength of the whole mortar can be obviously improved by the combination of the porous fiber and the rubber.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments, but the scope of the present invention is not limited to the embodiments.
The starting materials used in the following examples are all commercially available. Wherein the content of the first and second substances,
the fineness of the sierozem powder is 350-400 meshes, the free water content is not more than 2 percent, and the sum content of calcium oxide and magnesium oxide is not less than 85 percent. The closed pore rate of the vitrified micro bubbles is more than or equal to 97 percent, the particle diameter is 1.5-2.0mm, the volume weight is 150-3. The redispersible latex powder is an ethylene-vinyl acetate copolymer, and the particle size is 100-150 meshes. The particle diameter of the waste rubber powder is 2-5mm, and the bulk density is 1.2-2.0g/cm3. The fine sand is quartz sand with the grain diameter of 0.5 mm-1.0 mm.
Example 1:
preparing mortar:
s1, crushing waste rubber powder to 80-100 meshes, activating by low-temperature plasma, and treating by using a 3% KH570 silane coupling agent aqueous solution to obtain activated rubber powder;
s2, mixing polybutylene terephthalate fiber and xylene according to a mass ratio of 1: 3, mixing, soaking and filtering to obtain pretreated fiber, and washing the pretreated fiber for 6-9 times by using ethanol and propylene glycol to obtain porous fiber; soaking 5Kg of porous fiber in an ethanol solution, adding 5Kg of activated rubber powder, heating to 50 ℃, stirring for reaction for 5 hours, and filtering to obtain rubber modified porous fiber;
s3, a first step: mixing 60Kg of Portland cement, 20Kg of fine sand, 15Kg of vitrified micro bubbles and 15Kg of ash calcium powder by adopting a stirrer, wherein the mixing temperature is 30-40 ℃, the rotating speed of a stirrer motor is 1500-2000 r/min, the mixing time is 30-40 min, water is added or not added in the mixing process, and no obvious color value difference is required after mixing;
the second step is that: adding 8Kg of clay and 8Kg of bentonite, and mechanically mixing again at the rotating speed of 2000-2500 r/min for 40-50 min, wherein the temperature during mixing is 40-50 ℃, the clay and the bentonite are gradually added in the adding process, the clay and the bentonite are added firstly, the weight of the added clay is not more than 1/4 of the total weight of the added clay and the added bentonite is added at an interval of 30-45 s;
the third step: keeping the rotating speed, gradually adding the rubber modified porous fiber, mixing for 15-30 min, and keeping the temperature at 65-85 ℃ during mixing; finally, 8Kg of redispersible latex powder, 3Kg of cellulose ether and 3Kg of damping filler flaky mica are added in sequence and mixed evenly.
Example 2:
preparing mortar:
s1, crushing waste rubber powder to 80-100 meshes, activating by low-temperature plasma, and treating by using a 4% KH570 silane coupling agent aqueous solution to obtain activated rubber powder;
s2, mixing polybutylene terephthalate fiber and xylene according to a mass ratio of 1: 5, mixing, soaking and filtering to obtain pretreated fibers, and washing the pretreated fibers for 6-9 times by using ethanol and propylene glycol to obtain porous fibers; soaking 10Kg of porous fiber in ethanol solution, adding 15Kg of activated rubber powder, heating to 70 ℃, stirring for reaction for 3 hours, and filtering to obtain rubber modified porous fiber;
s3, a first step: mixing 80Kg of Portland cement, 30Kg of fine sand, 20Kg of vitrified micro bubbles and 20Kg of ash calcium powder by adopting a stirrer, wherein the mixing temperature is 30-40 ℃, the rotating speed of a stirrer motor is 1500-2000 r/min, the mixing time is 30-40 min, water is added or not added in the mixing process, and no obvious color value difference is required after mixing;
the second step is that: adding 15Kg of clay and 12Kg of bentonite, and mechanically mixing again at the rotating speed of 2000-2500 r/min for 40-50 min, wherein the temperature during mixing is 40-50 ℃, the clay and the bentonite are gradually added in the adding process, the clay and the bentonite are added firstly, the weight of the added clay is not more than 1/4 of the total weight of the clay and the bentonite are added once, and the adding interval is 30-45 s;
the third step: keeping the rotating speed, gradually adding the rubber modified porous fiber, mixing for 15-30 min, and keeping the temperature at 65-85 ℃ during mixing; finally, adding 12Kg of redispersible latex powder, 5Kg of cellulose ether and 5Kg of damping filler calcium carbonate in turn, and mixing uniformly.
Example 3:
preparing mortar:
s1, crushing waste rubber powder to 80-100 meshes, activating by low-temperature plasma, and treating by using a 5% KH570 silane coupling agent aqueous solution to obtain activated rubber powder;
s2, mixing polybutylene terephthalate fiber and xylene according to a mass ratio of 1: 4, mixing, soaking and filtering to obtain pretreated fiber, and washing the pretreated fiber for 6-9 times by using ethanol and propylene glycol to obtain porous fiber; soaking 8Kg of porous fiber in ethanol solution, adding 10Kg of activated rubber powder, heating to 60 ℃, stirring for reaction for 4 hours, and filtering to obtain rubber modified porous fiber;
s3, a first step: mixing 70Kg of Portland cement, 25Kg of fine sand, 16Kg of vitrified micro bubbles and 18Kg of ash calcium powder by adopting a stirrer, wherein the mixing temperature is 30-40 ℃, the rotating speed of a stirrer motor is 1500-2000 r/min, the mixing time is 30-40 min, water is added or not added in the mixing process, and obvious color value difference is not required after mixing;
the second step is that: adding 12Kg of clay and 10Kg of bentonite, and mechanically mixing again at the rotating speed of 2000-2500 r/min for 40-50 min, wherein the temperature during mixing is 40-50 ℃, the clay and the bentonite are gradually added in the adding process, the clay and the bentonite are added firstly, the weight of the added clay is not more than 1/4 of the total weight of the clay and the bentonite are added once, and the adding interval is 30-45 s;
the third step: keeping the rotating speed, gradually adding the rubber modified porous fiber, mixing for 15-30 min, and keeping the temperature at 65-85 ℃ during mixing; finally, 10Kg of redispersible latex powder, 3Kg of cellulose ether and 4Kg of damping filler barium sulfate are added in sequence and mixed evenly.
Example 4:
preparing mortar:
s1, crushing waste rubber powder to 80-100 meshes, activating by low-temperature plasma, and treating by using a 3% KH570 silane coupling agent aqueous solution to obtain activated rubber powder;
s2, mixing polybutylene terephthalate fiber and xylene according to a mass ratio of 1: 3-5, mixing, soaking and filtering to obtain pretreated fibers, and washing the pretreated fibers for 6-9 times by using ethanol and propylene glycol to obtain porous fibers; soaking 8Kg of porous fiber in ethanol solution, adding 10Kg of activated rubber powder, heating to 50-70 ℃, stirring for reaction for 3-5 hours, and filtering to obtain rubber modified porous fiber;
s3, a first step: mixing 75Kg of Portland cement, 22Kg of fine sand, 17Kg of vitrified micro bubbles and 17Kg of ash calcium powder by adopting a stirrer, wherein the mixing temperature is 30-40 ℃, the rotating speed of a stirrer motor is 1500-2000 r/min, the mixing time is 30-40 min, water is added or not added in the mixing process, and obvious color value difference is not required after mixing;
the second step is that: adding 10Kg of clay and 9Kg of bentonite, mechanically mixing again at the rotating speed of 2000-2500 r/min for 40-50 min, wherein the temperature during mixing is 40-50 ℃, the clay and the bentonite are gradually added in the adding process, the clay and the bentonite are added firstly, the weight of the added clay is not more than 1/4 of the total weight of the clay and the bentonite are added once, and the adding interval is 30-45 s;
the third step: keeping the rotating speed, gradually adding the rubber modified porous fiber, mixing for 15-30 min, and keeping the temperature at 65-85 ℃ during mixing; and finally, sequentially adding 9Kg of redispersible latex powder, 4Kg of cellulose ether and 3Kg of damping filler graphite powder, and uniformly mixing.
Comparative example 1:
in comparison with example 1, the porous fiber and the activated rubber powder were not combined by reaction, and only the porous fiber and the activated rubber powder were directly added, and the other operations were the same as example 1.
Comparative example 2:
compared with example 1, clay and bentonite were not added while the second step was omitted, and other operations were the same as example 1.
Comparative example 3:
compared with the example 1, the raw materials of the mortar are the same, but the used amount of the raw materials is different from that of the example 1, and other operations are the same as the example 1. The raw materials of this comparative example were used in the following amounts:
60Kg of Portland cement; 40Kg of fine sand; 15Kg of sierozem powder; 15Kg of vitrified micro bubbles; 3Kg of activated rubber powder; 8Kg of redispersible latex powder; 4Kg of clay and 4Kg of bentonite; 3Kg of cellulose ether; 3Kg of damping filler; 3Kg of porous fiber.
Performance testing
1. Cracking resistance of mortar
The sound-insulating mortars prepared in examples 1 to 4 and comparative examples 1 to 3 were tested for crack resistance according to the regulations of JG/T157 putty for exterior walls for buildings on the dynamic crack resistance method. The test method is as follows:
the prepared mortar to be tested is coated on an asbestos cement board by a special frame in a scraping way, wherein the size of the prepared mortar to be tested is 200mm multiplied by 150mm multiplied by (4-6) mm, the thickness of a wet film is 2mm, and the surface is ensured to be as flat as one. The drawdown panels were cured for 7 days in a standard environment, and 3 panels were prepared for each sample. And (3) testing the test board on a dynamic anti-cracking tester, and recording the maximum cracking width of the asbestos cement board to be tested to be accurate to 0.02mm before the material layer to be tested cracks. The arithmetic mean value of the test results of the two test plates with larger values is taken as the final result.
The test results are shown in table 1.
2. Tensile compression and shrinkage performances of mortar
The sound-insulating mortars prepared in examples 1 to 4 and comparative examples 1 to 3 were tested for compressive strength and flexural strength, and according to the standard GB/T17671-1999 Cement mortar Strength test method, the age of the strength test was 7 days and 28 days, respectively, and the test pieces were 40mm × 40mm × 160mm in size; the shrinkage performance was measured by the shrinkage test method described in JC/T603-2004 cement mortar dry shrinkage test method. The sound-insulating mortars prepared in examples 1 to 4 and comparative examples 1 to 3 were tested for tensile bond strength under 7-day standard curing, tensile bond strength under 28-day standard curing, and tensile bond strength after being immersed in water for seven days under 28-day standard curing, according to JGJ/T70-2009 "standards for basic performance test methods for building mortar".
The test results are shown in table 2.
3. Sound insulation test
The sound insulation mortar is applied to a 390 multiplied by 190 partition wall of the lightweight aggregate hollow block, the wall thickness is 190mm, the sound insulation quantity of the wall body which is not subjected to plastering treatment on two sides is 39-40dB, and the thickness of the sound insulation mortar prepared by adopting the examples 1-4 and the comparative examples 1-3 is 20 mm. The weighted sound insulation Rw is tested according to the national standard GB/T50121 and 2005. The test results are shown in table 2.
TABLE 1
Figure BDA0002512078320000081
TABLE 2
Figure BDA0002512078320000082
As can be seen from tables 1 and 2, the sound insulation mortar disclosed by the invention has the advantages of good crack resistance, good tensile and compression resistance, high bonding strength, low shrinkage rate and obvious sound insulation effect. Compared with the invention, the porous fiber and the activated rubber powder are not combined in the mortar preparation process, and the porous fiber and the activated rubber powder are only directly added, so that the performance of the obtained mortar is obviously reduced. Compared with the invention, the raw materials are not added with clay and bentonite, and the performance of the obtained mortar is reduced. Compared with the mortar of the invention, the content of each component in the components is different from that of the invention, and the performance of the prepared mortar is obviously lower than that of the mortar of the invention.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (10)

1. The sound insulation mortar with excellent tensile and compressive properties is characterized by comprising the following raw materials in parts by weight: 60-80 parts of Portland cement; 20-30 parts of fine sand; 15-20 parts of sierozem powder; 15-20 parts of vitrified micro bubbles; 5-15 parts of activated rubber powder; 8-12 parts of redispersible latex powder; 8-15 parts of clay and 8-12 parts of bentonite; 3-5 parts of cellulose ether; 3-5 parts of damping filler; 5-10 parts of porous fiber;
preparing the porous fiber: selecting one or more than two of polyester fiber, polyamide fiber and polypropylene fiber; mixing the selected fiber and xylene according to a mass ratio of 1: 3-5, mixing, soaking and filtering to obtain pretreated fibers, and washing the pretreated fibers for 6-9 times by using ethanol and propylene glycol to obtain porous fibers;
the preparation method of the sound insulation mortar comprises the following steps:
s1, crushing waste rubber powder to 80-100 meshes, activating by low-temperature plasma, and treating by using a KH570 silane coupling agent aqueous solution to obtain activated rubber powder;
s2, soaking the porous fiber in an ethanol solution, adding activated rubber powder, heating to 50-70 ℃, stirring for reaction for 3-5 hours, and filtering to obtain rubber modified porous fiber;
s3, firstly, uniformly mixing the portland cement, the fine sand, the vitrified micro bubbles and the sierozem powder, secondly, adding the clay and the bentonite, uniformly mixing, secondly, adding the rubber modified porous fiber, uniformly mixing, and finally, adding the redispersible latex powder, the cellulose ether and the damping filler, and uniformly mixing.
2. The sound insulation mortar with excellent tensile and compressive properties according to claim 1, which is prepared from the following raw materials in parts by weight: 60-80 parts of Portland cement; 20-30 parts of fine sand with the particle size of 0.5-1.0 mm; 15-20 parts of sierozem powder; 15-20 parts of vitrified micro bubbles; 5-15 parts of activated rubber powder; 8-12 parts of redispersible latex powder; 8-15 parts of clay and 8-12 parts of bentonite; 3-5 parts of cellulose ether; 3-5 parts of damping filler; 5-10 parts of porous fiber.
3. The sound insulation mortar with excellent tensile and compressive properties as claimed in claim 2, which is prepared from the following raw materials in parts by weight: 70 parts of Portland cement; 25 parts of fine sand with the particle size of 0.5-1.0 mm; 18 parts of sierozem powder; 16 parts of vitrified micro bubbles; 10 parts of activated rubber powder; 10 parts of redispersible latex powder; 12 parts of clay and 10 parts of bentonite; 3 parts of cellulose ether; 4 parts of damping filler; and 8 parts of porous fiber.
4. The sound-insulating mortar with excellent tensile and compressive properties as claimed in claim 1, wherein the sierozem powder has a fineness of 350-400 mesh, a free water content of not more than 2%, and a total content of calcium oxide and magnesium oxide of not less than 85%.
5. The sound-insulating mortar with excellent tensile and compressive properties as claimed in claim 1, wherein the vitrified micro bubbles have a closed porosity of 97% or more, a particle size of 1.5-2.0mm, and a bulk density of 150-200kg/m3。
6. The sound-insulating mortar with excellent tensile and compressive properties as claimed in claim 1, wherein the redispersible latex powder is an ethylene-vinyl acetate copolymer with a particle size of 100-150 mesh.
7. The sound insulation mortar with excellent tensile and compressive properties as claimed in claim 1, wherein the damping filler is one or more of flaky mica, graphite, calcium carbonate, barium sulfate or titanium dioxide.
8. The sound insulation mortar with excellent tensile and compressive properties as claimed in claim 1, wherein the porous fiber has a length of 2.0-3.0 mm and a porosity of 30-35%.
9. The sound insulation mortar with excellent tensile and compressive properties according to claim 1, wherein the selected fiber is polyester fiber, preferably polybutylene terephthalate.
10. The soundproof mortar excellent in tensile compression resistance according to claim 1, wherein S3 is performed by:
the first step is as follows: mixing the portland cement, the fine sand, the vitrified micro bubbles and the ash calcium powder by using a mixer, wherein the temperature during mixing is 30-40 ℃, the rotating speed of a motor of the mixer is 1500-2000 r/min, the mixing time is 30-40 min, water is added or not added during the mixing process, and no obvious color value difference is required after mixing;
the second step is that: adding clay and bentonite, and mechanically mixing again at a rotating speed of 2000-2500 r/min for 40-50 min at 40-50 ℃, wherein the clay and the bentonite are added in the adding process, the weight of the added clay is not more than 1/4 of the total weight in one time, and the adding time interval is 30-45 s;
the third step: keeping the rotating speed, gradually adding the rubber modified porous fiber, mixing for 15-30 min, and keeping the temperature at 65-85 ℃ during mixing; and finally, adding the redispersible latex powder, the cellulose ether and the damping filler in sequence, and uniformly mixing.
CN202010464326.5A 2020-05-27 2020-05-27 Sound insulation mortar with excellent tensile and compressive properties and preparation method thereof Pending CN111635191A (en)

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