CN114538954B - Vacuum light sound insulation mortar and preparation method thereof - Google Patents
Vacuum light sound insulation mortar and preparation method thereof Download PDFInfo
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- CN114538954B CN114538954B CN202111665265.XA CN202111665265A CN114538954B CN 114538954 B CN114538954 B CN 114538954B CN 202111665265 A CN202111665265 A CN 202111665265A CN 114538954 B CN114538954 B CN 114538954B
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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
- C04B28/06—Aluminous 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- 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
- C04B2111/40—Porous or lightweight 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
- C04B2201/20—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
- C04B2201/50—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 provides vacuum light sound insulation mortar and a preparation method thereof, wherein the vacuum light sound insulation mortar is prepared by mixing crack-resistant stuffy cement, vacuum materials, light materials, an initiator, a water reducing agent, a rheological agent, rubber powder and the like according to a certain mass percentage, wherein the initiator is prepared by adding caustic alkali powder and diethanolamide into a silica sol solution according to a certain mass ratio, stirring the mixture by a high-speed stirrer, drying the slurry into blocks, and then grinding the blocks into powder. The vacuum lightweight sound insulation mortar provided by the invention has the advantages of adjustable reaction foaming, high early strength, excellent sound insulation performance, light dry density, simple preparation process, convenience in construction and excellent performance, solves the problems of poor heat insulation and sound insulation performance and complicated construction of the existing heat insulation and sound insulation materials, and has good market application prospect and economic benefit.
Description
Technical Field
The invention relates to sound insulation mortar, in particular to vacuum light sound insulation mortar and a preparation method thereof, and belongs to the technical field of building materials.
Background
The floor heat-insulating sound-insulating board material is originally waterproof, and can reduce the structure thickness of a building, thereby increasing the indoor area. The heat-insulating and sound-insulating material in the current market has lower bonding strength, fracture resistance and compressive strength, poor heat-insulating property and impact sound-insulating property and easy condensation under the condition of large temperature difference. The existing heat-insulating sound-insulating board material has the problems that the heat-insulating layer falls off due to poor self-elasticity. In addition, the construction is complicated, and 2 to 4 construction steps are required.
The material for the heat-insulating and sound-insulating plate for the floor of the building generally has the characteristics of low density, small heat conductivity coefficient, low water absorption, good dimensional stability, reliable heat-insulating performance, convenient construction, environmental friendliness and the like. The environment-friendly novel material manufactured by the novel technology has high strength, is odorless and nontoxic natural materials, is superior to other materials in durability and use effect, is convenient to construct by directly adding water and stirring, and can directly smear light sound insulation mortar on a structural floor slab with the thickness of not less than 30mm, thereby avoiding complex node treatment and reducing cross operation. Compared with the traditional floating floor slab, the environment-friendly novel material disclosed by the invention saves the space height in a house, is not easy to form a sound bridge, is free from hollowing and cracking, has high cost performance, low comprehensive cost and excellent light sound insulation performance.
Disclosure of Invention
The invention aims to provide vacuum light sound insulation mortar for solving the problems of poor heat insulation and sound insulation and complicated construction of the existing heat insulation and sound insulation materials.
In order to achieve the aim, the invention adopts the technical scheme that the vacuum light sound insulation mortar consists of the following components in percentage by mass:
20 to 25 parts of crack-resistant bivalve cement,
20-30 parts of vacuum material,
20-40 parts of light material,
5-10 parts of an initiator,
1-4 parts of water reducer,
2-5 parts of a rheological agent,
10-15 parts of rubber powder.
Preferably, the crack resistant biquick cement is sulphoaluminate cement.
Preferably, the vacuum material is any one or a mixture of two of ceramic fiber and soda-lime glass powder.
Preferably, the lightweight material is an aerogel.
Preferably, the initiator is caustic alkali, silica sol and diethanolamide, and the mass ratio is 1-3:5-4: 4-2.
Preferably, the initiator is prepared by mixing caustic alkali powder and diethanolamide in a mass ratio of 1-3:4-2 is added into a silica sol solution with the mass concentration of 30%, the mixture is stirred for 30-40 minutes by a high-speed stirrer, the slurry is dried into blocks, and then the blocks are ground into powder, wherein the fineness of the powder is smaller than 5% after passing through a 100-mesh sieve. Wherein the diethanolamide mainly has the effects of reaction foaming, increasing the mixing amount and increasing the vacuum degree; the mixing amount is reduced, and the vacuum degree is reduced; the silica sol is mainly used for providing the environment required by the reaction, and the nanoscale silica and hydroxyl groups can stabilize the vacuum bubbles generated by the reaction. Caustic alkali is used as an alkali excitant, the reaction rate is mainly controlled, the mixing amount is reduced, and the foaming reaction is slowed down; the mixing amount is increased, and the foaming reaction can be quickened; the incorporation of caustic increases the bubble wall thickness, increasing the bubble stability and bubble strength.
Preferably, the water reducing agent is a polycarboxylic acid powder.
Preferably, the rheological agent is magnesium aluminium silicate.
Preferably, the rubber powder is pure acrylic rubber powder.
The invention also provides a preparation method of the vacuum light sound insulation mortar, which comprises the following preparation steps:
step one, weighing each component according to the mass parts of 20-25 parts of anti-cracking bivalve cement, 20-30 parts of vacuum material, 20-40 parts of light material, 5-10 parts of initiator, 1-4 parts of water reducer, 2-5 parts of rheological agent and 10-15 parts of rubber powder, and adding the components into a gravity-free mixer for stirring;
step two, fully stirring until the mixture is uniformly mixed to obtain a vacuum light sound insulation mortar primary product;
and thirdly, adding water into the vacuum light sound insulation mortar prepared in the second step, and then putting the vacuum light sound insulation mortar into a rubber sand stirrer for manually stirring for 40-80 seconds at a low speed to prepare a vacuum light sound insulation mortar finished product.
Compared with the prior art, the invention has the following beneficial effects:
(1) The reaction foaming is adjustable: the vacuum light sound insulation mortar is mixed with 40% of water (the water temperature is required to be 65 ℃), and a rubber sand stirrer is manually stirred at a low speed for 1 minute, so that the initiator and the vacuum materials are fully mixed, the stable reaction between the materials is controlled for 20 minutes, and the required ceramic glass vacuum continuous net-shaped closed pores are formed, so that the sound insulation effect is achieved. The reaction foaming can be regulated by the mixing proportion and the mixing amount of the initiator, and is particularly influenced by the performance of raw materials and the ambient temperature.
(2) The early strength is high: the vacuum light sound insulation mortar is mixed with 40% of water (the water temperature is required to be 65 ℃), and the mortar stirrer is manually stirred at a low speed for 1 minute, so that the initiator and the vacuum materials are fully mixed, the stable reaction between the materials is controlled for 20 minutes, the required ceramic glass vacuum continuous net-shaped closed pores are formed, the strength of more than 12 hours is 20MPa, and the site construction quality is fully ensured.
(3) The sound insulation performance is excellent: the vacuum light sound insulation mortar is mixed with 40% of water (the water temperature is required to be 65 ℃), and the glue sand stirrer is manually stirred at a low speed for 1 minute, so that the initiator and the vacuum materials are fully mixed, the stable reaction between the materials is controlled for 20 minutes, the required ceramic glass vacuum continuous net-shaped closed pores are formed, and the requirement that the standard impact sound pressure level of the metering standard is less than or equal to 45dB can be met.
(4) The dry density is light: the vacuum light sound insulation mortar is mixed with 40% of water (the water temperature is required to be 65 ℃), and a rubber sand stirrer is manually stirred at a low speed for 1 minute, so that the initiator and the vacuum materials are fully mixed, the stable reaction between the materials is controlled for 20 minutes, and the required ceramic glass vacuum continuous net-shaped closed pores are formed, so that the dry density is less than or equal to 350kg/m 3 Is not limited.
Detailed Description
Example 1
The vacuum light sound insulation mortar consists of the following components in parts by mass: 20 parts of crack-resistant bivalve cement, 25 parts of vacuum material, 35 parts of light material, 5 parts of initiator, 2 parts of water reducer, 2 parts of rheological agent and 11 parts of rubber powder. The anti-cracking bivalve cement is sulphoaluminate cement, the vacuum material is ceramic fiber, the light material is aerogel, the initiator is (caustic alkali: silica sol: diethanolamide=1:2.5:1.5 mixture), the water reducer is polycarboxylic acid powder, the rheological agent is magnesium aluminum silicate, and the rubber powder is pure acrylic rubber powder.
The preparation method of the vacuum light sound insulation mortar comprises the following steps: and weighing the components according to the mass parts, adding the components into a gravity-free mixer, and fully stirring and uniformly mixing the components to obtain the vacuum light sound insulation mortar.
Example 2
The vacuum light sound insulation mortar consists of the following components in parts by mass: 25 parts of crack-resistant bivalve cement, 28 parts of vacuum material, 21 parts of light material, 8 parts of initiator, 3 parts of water reducer, 3 parts of rheological agent and 12 parts of rubber powder. The anti-cracking bivalve cement is sulphoaluminate cement, the vacuum material is soda lime glass powder, the light material is aerogel, the initiator is (caustic alkali: silica sol: diethanolamide=1:4:3 mixture), the water reducer is polycarboxylic acid powder, the rheological agent is magnesium aluminum silicate, and the rubber powder is pure acrylic rubber powder.
The preparation method of the vacuum light sound insulation mortar comprises the following steps: and weighing the components according to the mass parts, adding the components into a gravity-free mixer, and fully stirring and uniformly mixing the components to obtain the vacuum light sound insulation mortar.
Example 3
The vacuum light sound insulation mortar consists of the following components in parts by mass: 20 parts of crack-resistant bivalve cement, 25 parts of vacuum material, 21 parts of light material, 10 parts of initiator, 4 parts of water reducer, 5 parts of rheological agent and 15 parts of rubber powder. The anti-cracking bivalve cement is sulphoaluminate cement, the vacuum material is a mixture of ceramic fibers and soda-lime glass powder (15 parts of ceramic fibers and 10 parts of soda-lime glass powder), the light material is aerogel, the initiator is (caustic alkali: silica sol: diethanolamide=4:4:2 mixture), the water reducer is polycarboxylic acid powder, the rheological agent is magnesium aluminum silicate, and the rubber powder is pure acrylic rubber powder.
The preparation method of the vacuum light sound insulation mortar comprises the following steps: and weighing the components according to the mass parts, adding the components into a gravity-free mixer, and fully stirring and uniformly mixing the components to obtain the vacuum light sound insulation mortar.
Control group 1
The vacuum light sound insulation mortar consists of the following components in parts by mass: 20 parts of crack-resistant bivalve cement, 25 parts of vacuum material, 35 parts of light material, 5 parts of initiator, 2 parts of water reducer, 2 parts of rheological agent and 11 parts of rubber powder. The anti-cracking bivalve cement is sulphoaluminate cement, the vacuum material is ceramic fiber, the light material is aerogel, the initiator is (caustic alkali: diethanolamide=2.5:2.5 mixture), the water reducing agent is polycarboxylic acid powder, the rheological agent is magnesium aluminum silicate, and the rubber powder is pure acrylic rubber powder.
Control group 1 preparation method: and weighing the components according to the mass parts, adding the components into a gravity-free mixer, and fully stirring and uniformly mixing the components to obtain the vacuum light sound insulation mortar.
Control group 2
The vacuum light sound insulation mortar consists of the following components in parts by mass: 20 parts of crack-resistant bivalve cement, 25 parts of vacuum material, 21 parts of light material, 10 parts of initiator, 4 parts of water reducer, 5 parts of rheological agent and 15 parts of rubber powder. The anti-cracking bivalve cement is sulphoaluminate cement, the vacuum material is a mixture of ceramic fibers and soda-lime glass powder (15 parts of ceramic fibers and 10 parts of soda-lime glass powder), the light material is aerogel, the initiator is (caustic alkali: diethanolamide=5:5 mixture), the water reducer is polycarboxylic acid powder, the rheological agent is magnesium aluminum silicate, and the rubber powder is pure acrylic rubber powder.
Control group 2 preparation method: and weighing the components according to the mass parts, adding the components into a gravity-free mixer, and fully stirring and uniformly mixing the components to obtain the vacuum light sound insulation mortar.
The initiator preparation method in the above examples: the diethanolamide and caustic alkali powder are proportionally added into a silica sol solution with 30 percent of solid content, stirred by a high-speed stirrer for more than 30 minutes, the slurry is dried into blocks, and then the blocks are ground into powder with fineness of less than 5 percent after passing through a 100-mesh sieve. The reaction process of the initiator needs to improve the reaction efficiency by means of high-speed dispersion, and the effect cannot be achieved under the condition of conventional stirring. The drying and grinding is a process production requirement, the cementing material can react when meeting the solution, and the drying and grinding are beneficial to production and storage. The sieving is to ensure that the fineness of the powder can meet the stirring and dissolving requirements during construction, and the reaction time and the efficiency are improved, so that the coagulation time is accurately controlled.
The vacuum lightweight sound insulation mortar of each example is mixed with 40% of water (the water temperature is required to be 65 ℃), and the mortar stirrer is manually stirred slowly for 1 minute, and the detection result is as follows (wherein, the water is tap water and accords with the regulation of JGJ 63):
the performance test of the vacuum lightweight sound insulation mortar mainly comprises operability time, compressive strength, impact sound pressure level, dry density and the like.
The results of the measurements are shown in Table 1
| Detecting items | Example 1 | Example 2 | Example 3 | Control group 1 | Control group 2 |
| Time of operability (h) | 2.5 | 3.4 | 3.0 | 2.4 | 2.9 |
| Dry density (kg/m) 3 ) | 300 | 350 | 320 | 400 | 420 |
| Compressive strength (MPa) | 26 | 28 | 25.5 | 20.3 | 19.5 |
| Coefficient of thermal conductivity [ W/(m.K)] | 0.028 | 0.025 | 0.02 | 0.085 | 0.090 |
| Water absorption (%) | 1.9 | 1.4 | 1.0 | 4.3 | 5 |
| Combustion grade | Class A | Class A | Class A | Class A | Class A |
| Weighting standard impact sound pressure level (30 mm thick) | 28dB | 26dB | 29dB | 80 | 85 |
The embodiment and the mechanical property test result show that the preparation method of the vacuum light sound insulation mortar can meet the requirement of quick construction. The initiator in the control group lacks one item, has poor effect in the aspect of performance detection, and has no practical value. In particular, the difference between the heat conductivity coefficient and the standard weighting standard impact sound pressure level detection value is too large to meet the standard requirement. Therefore, the initiator is indispensable in three raw materials, and the lack of one initiator leads to the result not meeting the standard requirement.
In the embodiment, the operation time, the dry density, the compressive strength, the heat conductivity coefficient, the water absorption, the combustion grade, the standard metering impact sound pressure level and the like have excellent performances, and can meet the performance requirements of the vacuum light sound insulation mortar. Meanwhile, the vacuum light sound insulation mortar disclosed by the invention has the advantages of simple preparation process, convenience in construction and excellent performance, and has good market application prospect and economic benefit.
The above embodiments only show the preferred technical solutions in the technical solutions of the present invention, other embodiments may be provided in the present invention, and all technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection of the present invention, and those skilled in the art can embody the principles and methods of the present invention without making any creative effort on some changes made in some steps.
Claims (2)
1. The vacuum light sound insulation mortar is characterized by comprising the following components in parts by weight:
20 to 25 parts of crack-resistant bivalve cement,
20-30 parts of vacuum material,
20-40 parts of light material,
5-10 parts of an initiator,
1-4 parts of water reducer,
2-5 parts of a rheological agent,
10-15 parts of rubber powder;
the anti-cracking bivalve cement is sulphoaluminate cement;
the vacuum material is any one or a mixture of two of ceramic fiber and soda-lime glass powder; the light material is aerogel;
the initiator is caustic alkali, silica sol and diethanolamide, and the mass ratio is 1-3:5-4:4-2, mixing and preparing;
the initiator comprises caustic alkali powder and diethanolamide in a mass ratio of 1-3:4-2, adding the mixture into a silica sol solution with the mass concentration of 30%, stirring for 30-40 minutes by a high-speed stirrer, drying the slurry into blocks, and then grinding the blocks into powder, wherein the fineness of the powder is less than 5% after passing through a 100-mesh sieve;
the water reducing agent is polycarboxylic acid powder;
the rheological agent is magnesium aluminum silicate;
the rubber powder is pure acrylic rubber powder.
2. The method for preparing the vacuum lightweight sound insulation mortar according to claim 1, wherein the preparation steps are as follows:
weighing each component according to the mass parts of 20-25 parts of anti-cracking bivalve cement, 20-30 parts of vacuum material, 20-40 parts of light material, 5-10 parts of initiator, 1-4 parts of water reducer, 2-5 parts of rheological agent and 10-15 parts of rubber powder, and adding into a gravity-free mixer for stirring;
step two, fully stirring until the mixture is uniformly mixed to obtain a vacuum light sound insulation mortar primary product;
and step three, mixing the vacuum light sound insulation mortar primary product prepared in the step two with 40% of water with the temperature of 65 ℃, and then placing the mixture into a rubber sand mixer for manually and slowly mixing for 1 minute to prepare a vacuum light sound insulation mortar finished product.
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| CN202111665265.XA CN114538954B (en) | 2021-12-31 | 2021-12-31 | Vacuum light sound insulation mortar and preparation method thereof |
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| CN102633526A (en) * | 2012-04-27 | 2012-08-15 | 武汉理工大学 | Extra-light porous thermal insulating material and method for preparing same |
| EP3535101B1 (en) * | 2016-11-01 | 2020-09-23 | Sika Technology AG | Process for printing a 3d structure with a multi-component mortar system |
| KR101832339B1 (en) * | 2017-04-10 | 2018-02-26 | 예환산업 주식회사 | Eco-friendly light weight finishing material composition and manufacturing method thereof |
| CN109231910A (en) * | 2018-08-31 | 2019-01-18 | 广州大学 | A kind of fiber aerogel foam concrete and its preparation method and application |
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