CN107857522B - Thermal insulation mortar and preparation method and application thereof - Google Patents
Thermal insulation mortar and preparation method and application thereof Download PDFInfo
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- CN107857522B CN107857522B CN201711266773.4A CN201711266773A CN107857522B CN 107857522 B CN107857522 B CN 107857522B CN 201711266773 A CN201711266773 A CN 201711266773A CN 107857522 B CN107857522 B CN 107857522B
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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
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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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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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
- 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
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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
- 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
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- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
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- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
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Abstract
The invention provides thermal insulation mortar and a preparation method and application thereof, and relates to the technical field of mortar. The thermal insulation mortar provided by the invention mainly takes quartz sand as a framework, cement and attapulgite are added to improve the bonding force of the mortar, and meanwhile, the situation that a thermal insulation material is mainly used in the past is changed, a plurality of thermal insulation raw materials including vitrified micro bubbles, hollow glass micro bubbles, expanded vermiculite, rock wool and mica powder are added, and the thermal insulation effect of the thermal insulation mortar is obviously enhanced and is not easy to break through the synergistic cooperation effect among the raw materials, so that the residual thermal insulation raw materials can continuously play a role, and the fault tolerance rate is improved even if one thermal insulation raw material is not suitable for construction environment or is damaged; in addition, the fly ash and the silica fume are added, so that the workability and pumpability of the thermal insulation mortar are improved, and the anti-permeability capability of the coating is enhanced. The invention also provides a preparation method of the thermal insulation mortar, which has simple process and ensures that the components have good compatibility by limiting specific process parameters.
Description
Technical Field
The invention relates to the technical field of mortar, in particular to thermal insulation mortar and a preparation method and application thereof.
Background
At present, the thermal insulation mortar is of various types, and can be roughly divided into organic thermal insulation mortar and inorganic thermal insulation mortar.
The organic heat-insulating mortar is a new type heat-insulating energy-saving heat-insulating mortar material (for example polyphenyl granule heat-insulating mortar) for internal and external walls of building, and is a polymer dry powder mortar heat-insulating material formed from organic light heat-insulating granules as light aggregate and cementing material, polymer additive and other filling material. The mortar raw material has low heat conductivity coefficient, good heat preservation effect and strong chemical stability. But the plasticity is poor and the construction is difficult in the construction process, and the high temperature resistance is poor, and harmful gas is easy to generate. Meanwhile, the thickness of the mortar during construction is not easy to control, and the thickness is easy to be uneven. Due to the use of organic materials, the mortar has the defects of poor fireproof performance, unstable product quality in the later period and the like.
The inorganic heat-insulating mortar is formed by mixing inorganic materials, such as expanded perlite mortar, and the mortar is made of non-combustible inorganic materials and has the advantages of excellent fireproof effect and ageing resistance. However, the vitrified micro bubbles have larger particles and are easy to break, so that the effect of the vitrified micro bubbles is lost. And with the addition of the vitrified micro bubbles, the overall performance of the mortar is reduced, such as compression resistance and binding power. Meanwhile, the mortar is poor in water resistance, is easy to loosen after being soaked in water, and has a large risk.
In view of the above, a technical solution is proposed to solve the above problems.
Disclosure of Invention
The first purpose of the invention is to provide thermal insulation mortar, which mainly uses quartz sand as a framework, cement and attapulgite are added to improve the binding power of the mortar, meanwhile, the traditional method that one thermal insulation material is mainly used is changed, a plurality of thermal insulation raw materials of vitrified micro-beads, hollow glass micro-beads, expanded vermiculite, rock wool and mica powder are added, the thermal insulation effect of the thermal insulation mortar is obviously enhanced through the synergistic cooperation effect of the raw materials, and the residual thermal insulation material can continuously play a role even if one material is not suitable for construction environment or damaged, so that the fault tolerance rate is improved.
The second purpose of the invention is to provide a preparation method of the thermal insulation mortar, which has simple process, ensures that the components have good compatibility through the limitation of specific process parameters, and further enhances the coordination and coordination effect among the components.
The third purpose of the invention is to provide application of the thermal insulation mortar.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
the invention provides thermal insulation mortar which is mainly prepared from the following raw materials: powder, elastic acrylic emulsion, penetrant and water;
wherein the powder comprises the following raw materials in parts by weight: 15-20% of cement, 15-20% of quartz sand, 15-20% of mica powder, 5-15% of attapulgite, 15-20% of vitrified micro-beads, 8-12% of hollow glass micro-beads, 10-15% of expanded vermiculite, 5-10% of fly ash, 3-5% of rock wool and 1.5-2% of silica fume.
Further, the thermal insulation mortar is mainly prepared from the following raw materials:
the weight ratio of the powder material to the elastic acrylic emulsion to the penetrating agent to the water is 100 (15-25) to (1-2) to (20-30);
wherein the powder comprises the following raw materials in parts by weight: 15-20% of cement, 15-20% of quartz sand, 15-20% of mica powder, 5-15% of attapulgite, 15-20% of vitrified micro-beads, 8-12% of hollow glass micro-beads, 10-15% of expanded vermiculite, 5-10% of fly ash, 3-5% of rock wool and 1.5-2% of silica fume.
Further, the thermal insulation mortar also comprises a thickening agent, wherein the thickening agent accounts for 1% -2% of the weight of the powder;
preferably, the thermal insulation mortar also comprises a defoaming agent, wherein the defoaming agent accounts for 1-2% of the weight of the powder.
Further, the thermal insulation mortar is mainly prepared from the following raw materials:
the weight ratio of the powder material to the elastic acrylic emulsion to the penetrating agent to the thickening agent to the defoaming agent to the water is 100 (16-25) to (1-2) to (20-30);
wherein the powder comprises the following components in parts by weight: 15-19% of cement, 15-19% of quartz sand, 15-20% of mica powder, 5-15% of attapulgite, 15-20% of vitrified micro-beads, 8-12% of hollow glass micro-beads, 10-15% of expanded vermiculite, 5-10% of fly ash, 3-5% of rock wool and 1.5-2% of silica fume.
Further, the particle size of the hollow glass beads is 90-120 μm;
preferably, the particle size of the fly ash is 100-150 μm.
Further, the size of the expanded vermiculite is 1-5 mm;
the size of the rock wool is 1-5 mm.
Further, the cement is one of high alumina cement, white cement or black cement or a combination of at least two of the high alumina cement, the white cement and the black cement.
Furthermore, the mesh number of the quartz sand is 100-200 meshes;
preferably, the mesh number of the silica fume is 100-500 meshes.
The invention also provides a preparation method of the thermal insulation mortar, which comprises the following steps:
(a) uniformly stirring rock wool, a penetrant and water according to the formula ratio to obtain rock wool dispersion liquid;
(b) mixing the elastic acrylic emulsion, optional defoaming agent and thickening agent according to the formula ratio, and adding rock wool dispersion liquid to obtain a mixture;
(c) and (b) mixing and stirring the hollow glass beads, the expanded vermiculite, the fly ash, the silica fume, the vitrified micro beads, the cement, the quartz sand, the attapulgite and the mica powder according to the formula ratio, mixing with the mixture obtained in the step (b), adding water and stirring to obtain the thermal insulation mortar.
The invention also provides application of the thermal insulation mortar in building construction.
Compared with the prior art, the thermal insulation mortar and the preparation method thereof provided by the invention have the following beneficial effects:
(1) the invention provides a thermal insulation mortar, which mainly takes quartz sand as a framework, cement and attapulgite are added to improve the bonding force of the mortar, and meanwhile, the situation that a thermal insulation material is mainly used in the past is changed, a plurality of thermal insulation raw materials of vitrified micro bubbles, hollow glass micro bubbles, expanded vermiculite, rock wool and mica powder are added, the thermal insulation effect of the thermal insulation mortar is obviously enhanced and is not easy to break through the synergistic cooperation effect among the raw materials, and even if one thermal insulation raw material is not suitable for construction environment or damaged, the rest thermal insulation raw materials can continuously play a role, so that the fault tolerance rate is improved; in addition, by adding the fly ash and the silica fume, the workability and pumpability of the thermal insulation mortar are improved, the anti-permeability capability of the coating is enhanced, and the problems that the conventional thermal insulation mortar is poor in water resistance and the coating is easy to loosen after being soaked in water are solved.
(2) The invention provides a preparation method of thermal insulation mortar, which has simple process and easy operation, ensures that all components have good compatibility through limiting specific process parameters, further enhances the coordination and coordination effect of all components, and ensures that the prepared thermal insulation mortar has good comprehensive performance.
(3) The invention provides application of thermal insulation mortar, and in view of the advantages of the thermal insulation mortar provided by the invention, the thermal insulation mortar can be widely applied to building construction.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
According to one aspect of the invention, the thermal insulation mortar is provided, and the thermal insulation mortar is mainly prepared from the following raw materials:
the weight ratio of the powder material to the elastic acrylic emulsion to the penetrating agent to the water is 100 (15-25) to (1-2) to (20-30);
wherein the powder comprises the following raw materials in parts by weight: 15-20% of cement, 15-20% of quartz sand, 15-20% of mica powder, 5-15% of attapulgite, 15-20% of vitrified micro-beads, 8-12% of hollow glass micro-beads, 10-15% of expanded vermiculite, 5-10% of fly ash, 3-5% of rock wool and 1.5-2% of silica fume.
The invention provides a thermal insulation mortar, which mainly takes quartz sand as a framework, cement and attapulgite are added to improve the bonding force of the mortar, meanwhile, the situation that a thermal insulation material is mainly used in the past is changed, a plurality of thermal insulation raw materials of vitrified micro bubbles, hollow glass micro bubbles, expanded vermiculite, rock wool and mica powder are added, the thermal insulation effect of the thermal insulation mortar is obviously enhanced through the synergistic cooperation effect among the raw materials, and even if one material is not suitable for construction environment or is damaged, the residual thermal insulation material can continuously play a role, so that the fault tolerance rate is improved; in addition, by adding the fly ash and the silica fume, the workability and pumpability of the thermal insulation mortar are improved, the anti-permeability capability of the coating is enhanced, and the problems that the conventional thermal insulation mortar is poor in water resistance and the coating is easy to loosen after being soaked in water are solved.
Specifically, the thermal insulation mortar takes quartz sand as a framework, and two kinds of clay of cement and attapulgite are added, so that the bonding strength of the mortar is improved.
Wherein the quartz sand is typically, but not limited to, 15%, 16%, 17%, 18%, 19%, or 20% by weight. Preferably, the mesh size of the quartz sand is 100-200 mesh, and typical, but not limiting, mesh sizes are 100 mesh, 120 mesh, 150 mesh, 180 mesh or 200 mesh.
The cement is typically, but not limited to, 15%, 16%, 17%, 18%, 19%, or 20% by weight. The cement is preferably one or a combination of at least two of high alumina cement, white cement, and black cement, and more preferably high alumina cement, in terms of the type of cement.
The typical but non-limiting weight fraction of attapulgite is 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14% or 15%.
Mica powder is also added into the thermal insulation mortar. The mica powder has high hardness, good flame retardant property and good heat radiation property.
The mica powder typically, but not by way of limitation, is 15%, 16%, 17%, 18%, 19% or 20% by weight.
The vitrified micro bubbles are used as an environment-friendly novel inorganic light heat-insulating material, and are a novel inorganic particle heat-insulating material which is formed by uniformly expanding pitchstone with a certain particle size from inside to outside after passing through high temperature, vitrifying the surface through instantaneous high temperature, cooling and solidifying, has a complete shell with certain strength and is internally provided with a complete porous nest-shaped structure. Small size, light weight, unique performance and stable structure.
Typical but non-limiting weight fractions of the vitrified micro bubbles are 15%, 16%, 17%, 18%, 19% or 20%.
Because the vitrified micro bubbles are easy to break, and the heat preservation effect is lost, a plurality of heat preservation raw materials such as hollow glass micro bubbles, expanded vermiculite, rock wool and the like are added into the heat preservation mortar. Multiple heat preservation raw materials have the cooperation effect for the heat preservation effect of heat preservation mortar further strengthens, and even a material is not suitable for the construction environment or suffers destruction, remaining heat preservation raw materials can continue to play a role, has improved the fault-tolerant rate.
The hollow glass beads are low in heat conductivity coefficient, excellent in heat preservation effect, extremely small in particle size and not easy to damage in the transportation, stirring and construction processes.
Typical but non-limiting weight fractions of hollow glass microspheres are 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 11.5%, or 12%.
Preferably, the particle size of the hollow glass microspheres is 50 to 120 μm, more preferably 60 to 110 μm, and still more preferably 100 μm. The hollow glass beads have extremely small particle size and are not easy to damage in the transportation, stirring and construction processes.
The hollow glass bead is selected from one or a combination of at least two of HN40, K25, GS25, K20 or D10000, preferably GS25 or GS25 and other components. It should be noted that the above-mentioned designations are merely exemplary and are not limiting.
The expanded vermiculite is formed by rapidly expanding a plurality of times to a plurality of times in volume after the vermiculite is roasted at high temperature. The average volume weight of the expanded vermiculite is 50-200kg/m3The heat-insulating material has fine air isolating layers, is a good heat-insulating material, and can preserve heat, insulate heat, absorb sound and resist frost erosion. The heat-insulating raw material which is not easy to damage and is expanded vermiculite is added into the mortar, so that the problem of reduced effect of the mortar caused by material damage is solved.
Typical but non-limiting weight fractions of expanded vermiculite are 10%, 10.5%, 11%, 11.5%, 12%, 13%, 14% or 15%.
The expanded vermiculite particles are too large and too small, so that through air holes appear in the product, and the heat insulation performance of the product is influenced. In the present invention, the average size of the exfoliated vermiculite is preferably 1 to 5mm, more preferably 2 to 4mm, and still more preferably 3 mm.
Rock wool is added into the heat-insulating mortar, so that the heat-insulating property of the mortar can be improved, and the fireproof property of the mortar can be improved. Rock wool typically, but not by way of limitation, has a weight fraction of 3%, 3.5%, 4%, 4.5% or 5%. Preferably, the rockwool is in the form of short fibres having an average size of 1 to 5mm, preferably 2 to 4mm, more preferably 3 mm.
The fly ash and the silica fume are added, so that the workability and pumpability of the mortar are improved, the anti-permeability capability of the mortar is enhanced, and the problems that the conventional thermal insulation mortar is poor in water resistance and the mortar is easy to loosen after being soaked in water are solved.
Typical but not limiting weight fractions of fly ash are 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5% or 10%.
The particle size of the fly ash is preferably 100-150 μm, and more preferably 100-140 μm.
The silica fume is typically, but not limited to, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, or 2% by weight.
According to the invention, through grading of the powder raw materials, gaps among quartz sand aggregates are filled, the hardness of the mortar is enhanced, and the problems of easiness in loosening and poor compression resistance of the mortar are solved.
The elastic acrylic emulsion has excellent rebound resilience, flexibility, adhesion, water resistance, weather resistance and other performances, is used in mortar to enable the mortar to have excellent elasticity and elongation, and can effectively cover fine cracks of a wall body.
In the present invention, the elastomeric acrylic emulsion typically, but not limited to, has a weight fraction of 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, or 25%.
The penetrant is added, so that the loosening of rock wool and the formation of slurry are facilitated, and the soaking time is shortened.
Typical but non-limiting weight fractions of penetrants are 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, or 2%.
The penetrant used in the present invention is a known penetrant to those skilled in the art, and may be commercially available or prepared by itself. Typical but non-limiting osmotic agents are, for example, fatty alcohol polyoxyethylene ether phosphate, fast osmotic agent T or monolauryl phosphate.
The weight ratio of the powder, the elastic acrylic emulsion, the penetrant and the water is controlled within a reasonable range. Typical but non-limiting weight ratios between powder, elastomeric acrylic emulsion, osmotic agent, and water are 100:15:1:20, 100:18:1:20, 100:25:1:20, 100:15:2:20, 100:15:1: 25, 100:15:1:28, or 100:15:1: 30.
In order to further enhance the comprehensive performance of the thermal insulation mortar, such as the compatibility among the raw materials, the coordination and coordination among the raw materials, the coating performance of the mortar and the like, the invention also adds the auxiliary agent, and the auxiliary agent can be selectively added according to the performance of the required thermal insulation mortar.
The term "comprising" as used herein means that it may include, in addition to the components, other components, such as defoamers, leveling agents, thickeners, etc., which impart different properties to the thermal mortar. In addition, the term "comprising" as used herein may be replaced by "being" or "consisting of … …" as closed.
In order to adjust the consistency of the mortar and improve the thixotropy and the water retention of the mortar, in a preferred embodiment of the invention, the thermal mortar further comprises a thickening agent, wherein the thickening agent accounts for 1-2% of the weight of the powder.
Typical but non-limiting weight fractions of thickeners are 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9% or 2%.
The thickeners useful in the present invention are well known to those skilled in the art and may be commercially available or prepared by themselves. Typical but not limiting thickeners are for example polyethylene oxide, cellulose ethers, modified starch ethers or mineral gelling materials.
In order to suppress the generation of bubbles, in a preferred embodiment of the invention, the thermal mortar further comprises an antifoaming agent, typically but not limited to a weight fraction of 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9% or 2%.
The defoaming agents used in the present invention are those known to those skilled in the art and may be either commercially available or prepared by themselves. Typical but non-limiting defoamers are, for example, polyether modified silicon defoamers or organic ester defoamers.
In a preferred embodiment of the invention, the thermal insulation mortar is mainly prepared from the following raw materials:
the weight ratio of the powder material to the elastic acrylic emulsion to the penetrating agent to the thickening agent to the defoaming agent to the water is 100 (16-25) to (1-2) to (20-30);
wherein the powder comprises the following components in parts by weight: 15-19% of cement, 15-19% of quartz sand, 15-20% of mica powder, 5-15% of attapulgite, 15-20% of vitrified micro-beads, 8-12% of hollow glass micro-beads, 10-15% of expanded vermiculite, 5-10% of fly ash, 3-5% of rock wool and 1.5-2% of silica fume.
Typical but non-limiting weight ratios between the powder, the elastic acrylic emulsion, the penetrant, the thickener, the defoamer and the water are 100:15:1:1:1:20, 100:18:1:1:1:20, 100:25:1: 1:20, 100:15:2:1: 20, 100:15:1:2: 20, 100:15:1:1:2:25, 100:15:1:2: 30, 100:15:2:2: 25 or 100:18:2: 1:2: 30.
The use amount of each component is limited, so that the coordination effect among the raw materials is further enhanced, and the heat-insulating efficiency of the heat-insulating mortar is improved.
The invention also provides a preparation method of the thermal insulation mortar, which comprises the following steps:
(a) uniformly stirring rock wool, a penetrant and water according to the formula ratio to obtain rock wool dispersion liquid;
(b) mixing the elastic acrylic emulsion, the optional defoaming agent and the thickening agent according to the formula ratio, adding the rock wool dispersion liquid, and uniformly stirring to obtain a mixture;
(c) and (b) mixing and stirring the cement, the quartz sand, the mica powder, the attapulgite, the vitrified micro bubbles, the hollow glass micro bubbles, the expanded vermiculite, the fly ash and the silica fume according to the formula ratio, mixing with the mixture obtained in the step (b), adding water and stirring to obtain the thermal insulation mortar.
The preparation method of the invention ensures that the components have good compatibility through the limitation of specific process parameters, and the coordination and coordination effect among the components is further enhanced. Meanwhile, the preparation method provided by the invention is simple in process, easy to operate and suitable for industrial production.
Based on the advantages of the thermal insulation mortar, the invention also provides application of the thermal insulation mortar in building construction.
The present invention will be further described with reference to specific examples and comparative examples.
Example 1
The thermal insulation mortar is mainly prepared from the following raw materials: the elastic acrylic emulsion comprises powder, elastic acrylic emulsion, penetrant and water, wherein the weight ratio of the powder to the elastic acrylic emulsion to the penetrant to the water is 100:15:1: 30;
the powder comprises the following raw materials in parts by weight: 15% of cement, 15% of quartz sand, 15% of mica powder, 10% of attapulgite, 15% of vitrified micro-beads, 9.5% of hollow glass micro-beads, 10% of expanded vermiculite, 5% of fly ash, 4% of rock wool and 1.5% of silica fume;
wherein the cement is high alumina cement, the mesh number of quartz sand is 100 meshes, the hollow glass microspheres are 100 microns, the average size of the expanded vermiculite is 3mm, the rock wool is rock wool short fiber, the average size is 3mm, the mesh number of silica fume is 300 meshes, and the penetrating agent is a rapid penetrating agent T.
The preparation method of the thermal insulation mortar comprises the following steps:
(a) uniformly stirring rock wool, a penetrant and water according to a weight ratio of 4:1:5 at a high speed to obtain rock wool dispersion liquid;
(b) mixing the elastic acrylic emulsion, the optional defoaming agent and the thickening agent according to the formula ratio, adding the rock wool dispersion liquid obtained in the step (a), and uniformly stirring by using a disperser to obtain a mixture;
(c) and (b) mixing the cement, the quartz sand, the mica powder, the attapulgite, the vitrified micro bubbles, the hollow glass micro bubbles, the expanded vermiculite, the fly ash and the silica fume according to the formula ratio, uniformly stirring by using a disperser, mixing with the mixture obtained in the step (b), adding the residual amount of water, and uniformly stirring to obtain the thermal insulation mortar.
Example 2
The thermal mortar provided in this example is prepared by adding a thickener, specifically polyethylene oxide, to the raw material of the thermal mortar in example 1. The weight ratio of the powder material, the elastic acrylic emulsion, the penetrating agent, the thickening agent and the water is 100:15:1:1: 30.
The concrete steps of the preparation method of the thermal insulation mortar of the embodiment can refer to the embodiment 1.
Example 3
The thermal mortar provided by the embodiment is prepared by adding a thickening agent and a defoaming agent on the basis of the raw materials of the thermal mortar in the embodiment 1, wherein the thickening agent is polyoxyethylene, and the defoaming agent is a polyether modified silicon defoaming agent. The weight ratio of the powder material to the elastic acrylic emulsion to the penetrating agent to the thickening agent to the defoaming agent to the water is 100:15:1:1:1: 30;
the concrete steps of the preparation method of the thermal insulation mortar of the embodiment can refer to the embodiment 1.
Example 4
The thermal insulation mortar is mainly prepared from the following raw materials: the coating comprises powder, elastic acrylic emulsion, penetrating agent and water, wherein the weight ratio of the powder to the elastic acrylic emulsion to the penetrating agent to the thickening agent to the defoaming agent to the water is 100:25:2:1.5:1: 20;
the powder comprises the following raw materials in parts by weight: 16% of cement, 15% of quartz sand, 17% of mica powder, 10% of attapulgite, 15% of vitrified micro-beads, 8% of hollow glass micro-beads, 11% of expanded vermiculite, 5% of fly ash, 3% of rock wool and 2% of silica fume;
wherein the cement is black cement, the mesh number of quartz sand is 150 meshes, the hollow glass microspheres are 120 microns, the average size of expanded vermiculite is 4mm, the rock wool is rock wool short fiber, the average size is 2mm, the mesh number of silica fume is 400 meshes, the penetrating agent is a rapid penetrating agent T, the thickening agent is polyoxyethylene specifically, and the defoaming agent is a polyether modified silicon defoaming agent.
The preparation method of the thermal insulation mortar comprises the following steps:
(a) mixing rock wool, a penetrant and water according to a formula ratio of 3:2:8, and uniformly stirring at a high speed to obtain rock wool dispersion;
(b) mixing the elastic acrylic emulsion, the optional defoaming agent and the thickening agent according to the formula ratio, adding the rock wool dispersion liquid obtained in the step (a), and uniformly stirring by using a disperser to obtain a mixture;
(c) and (b) mixing the cement, the quartz sand, the mica powder, the attapulgite, the vitrified micro bubbles, the hollow glass micro bubbles, the expanded vermiculite, the fly ash and the silica fume according to the formula ratio, uniformly stirring by using a disperser, mixing with the mixture obtained in the step (b), adding the residual amount of water, and uniformly stirring to obtain the thermal insulation mortar.
Example 5
The thermal mortar provided in this example was prepared by changing the weight ratio of the powder, the elastic acrylic emulsion, the penetrating agent, the thickening agent, the defoaming agent and the water in the thermal mortar raw materials of example 4 to 100:18:2:1.5: 1:27, and the remaining raw materials and the amounts thereof were the same as in example 4.
The concrete steps of the preparation method of the thermal insulation mortar of the embodiment can refer to the embodiment 4.
Example 6
The thermal insulation mortar is mainly prepared from the following raw materials: the coating comprises powder, elastic acrylic emulsion, penetrating agent and water, wherein the weight ratio of the powder to the elastic acrylic emulsion to the penetrating agent to the thickening agent to the defoaming agent to the water is 100:20:1.5:1:1.5: 25;
the powder comprises the following raw materials in parts by weight: 16% of cement, 15% of quartz sand, 16% of mica powder, 5% of attapulgite, 16% of vitrified micro bubbles, 12% of hollow glass micro bubbles, 10% of expanded vermiculite, 5% of fly ash, 3.2% of rock wool and 1.8% of silica fume;
wherein the cement is high-alumina cement, the mesh number of quartz sand is 200 meshes, the hollow glass microspheres are 80 microns, the average size of expanded vermiculite is 2mm, the rock wool is rock wool short fiber, the average size is 3.5mm, the mesh number of silica fume is 250 meshes, the penetrating agent is a composition of a rapid penetrating agent T and monolauryl phosphate, the thickening agent is polyoxyethylene specifically, and the defoaming agent is a polyether modified silicon defoaming agent.
The preparation method of the thermal insulation mortar comprises the following steps:
(a) mixing rock wool, a penetrant and water according to a weight ratio of 3.2:1.8:7, and uniformly stirring at a high speed to obtain rock wool dispersion liquid;
(b) mixing the elastic acrylic emulsion, the optional defoaming agent and the thickening agent according to the formula ratio, adding the rock wool dispersion liquid obtained in the step (a), and uniformly stirring by using a disperser to obtain a mixture;
(c) and (b) mixing the cement, the quartz sand, the mica powder, the attapulgite, the vitrified micro bubbles, the hollow glass micro bubbles, the expanded vermiculite, the fly ash and the silica fume according to the formula ratio, uniformly stirring by using a disperser, mixing with the mixture obtained in the step (b), adding the residual amount of water, and uniformly stirring to obtain the thermal insulation mortar.
Example 7
The thermal insulation mortar is mainly prepared from the following raw materials: the coating comprises powder, elastic acrylic emulsion, penetrating agent and water, wherein the weight ratio of the powder to the elastic acrylic emulsion to the penetrating agent to the thickening agent to the defoaming agent to the water is 100:19:1:2:1.5: 26;
the powder comprises the following raw materials in parts by weight: 19% of cement, 15% of quartz sand, 15% of mica powder, 6% of attapulgite, 17% of vitrified micro bubbles, 8% of hollow glass micro bubbles, 10% of expanded vermiculite, 5.5% of fly ash, 3% of rock wool and 1.5% of silica fume.
Wherein the cement is white cement, the mesh number of the quartz sand is 200 meshes, the hollow glass microspheres are 80 microns, the average size of the expanded vermiculite is 2mm, the rock wool is rock wool short fiber, the average size is 3.5mm, the mesh number of the silica fume is 250 meshes, the penetrating agent is monolauryl phosphate, the thickening agent is a composition of polyethylene oxide and cellulose ether, and the defoaming agent is a polyether modified silicon defoaming agent.
The concrete steps of the preparation method of the thermal insulation mortar of the embodiment can refer to the embodiment 6.
Example 8
The thermal insulation mortar is mainly prepared from the following raw materials: the coating comprises powder, elastic acrylic emulsion, penetrating agent and water, wherein the weight ratio of the powder to the elastic acrylic emulsion to the penetrating agent to the thickening agent to the defoaming agent to the water is 100:16:1.5:2:2: 29;
the powder comprises the following raw materials in parts by weight: 16% of cement, 20% of quartz sand, 15% of mica powder, 5% of attapulgite, 16.5% of vitrified micro bubbles, 8% of hollow glass micro bubbles, 10% of expanded vermiculite, 5% of fly ash, 3% of rock wool and 1.5% of silica fume;
wherein the cement is black cement, the mesh number of quartz sand is 180 meshes, the hollow glass microspheres are 120 microns, the average size of expanded vermiculite is 2.5mm, the rock wool is rock wool short fiber, the average size is 4mm, the mesh number of silica fume is 500 meshes, the penetrating agent is monolauryl phosphate, the thickening agent is a mineral gel material, and the defoaming agent is a polyether modified silicon defoaming agent.
The concrete steps of the preparation method of the thermal insulation mortar of the embodiment can refer to the embodiment 6.
Example 9
The thermal insulation mortar is mainly prepared from the following raw materials: the coating comprises powder, elastic acrylic emulsion, penetrating agent and water, wherein the weight ratio of the powder to the elastic acrylic emulsion to the penetrating agent to the thickening agent to the defoaming agent to the water is 100:21:1.2:1:1.8: 24;
the powder comprises the following raw materials in parts by weight: 16% of cement, 16% of quartz sand, 20% of mica powder, 5% of attapulgite, 15.5% of vitrified micro bubbles, 8% of hollow glass micro bubbles, 10% of expanded vermiculite, 5% of fly ash, 3% of rock wool and 1.5% of silica fume;
wherein the cement is black cement, the mesh number of quartz sand is 180 meshes, the hollow glass microspheres are 120 microns, the average size of expanded vermiculite is 2.5mm, the rock wool is rock wool short fiber, the average size is 3mm, the mesh number of silica fume is 300 meshes, the penetrating agent is fatty alcohol polyoxyethylene ether phosphate, the thickening agent is a mineral gel material, and the defoaming agent is a polyether modified silicon defoaming agent.
The concrete steps of the preparation method of the thermal insulation mortar of the embodiment can refer to the embodiment 4.
Example 10
The thermal insulation mortar is mainly prepared from the following raw materials: the coating comprises powder, elastic acrylic emulsion, penetrating agent and water, wherein the weight ratio of the powder to the elastic acrylic emulsion to the penetrating agent to the thickening agent to the defoaming agent to the water is 100:22:1.4:1.6:1.2: 23;
the powder comprises the following raw materials in parts by weight: 15% of cement, 15% of quartz sand, 15% of mica powder, 5% of attapulgite, 20% of vitrified micro bubbles, 8% of hollow glass micro bubbles, 10% of expanded vermiculite, 7.5% of fly ash, 3% of rock wool and 1.5% of silica fume.
Wherein the cement is black cement, the mesh number of quartz sand is 120 meshes, the hollow glass microspheres are 90 microns, the average size of expanded vermiculite is 2.5mm, the rock wool is rock wool short fiber, the average size is 4mm, the mesh number of silica fume is 500 meshes, the penetrating agent is fatty alcohol polyoxyethylene ether phosphate, the thickening agent is a mineral gel material, and the defoaming agent is a polyether modified silicon defoaming agent.
The concrete steps of the preparation method of the thermal insulation mortar of the embodiment can refer to the embodiment 4.
Example 11
The thermal insulation mortar is mainly prepared from the following raw materials: the coating comprises powder, elastic acrylic emulsion, penetrating agent and water, wherein the weight ratio of the powder to the elastic acrylic emulsion to the penetrating agent to the thickening agent to the defoaming agent to the water is 100:24:1.8:1:1.2: 21;
the powder comprises the following raw materials in parts by weight: 15% of cement, 15% of quartz sand, 15% of mica powder, 5% of attapulgite, 15% of vitrified micro-beads, 8% of hollow glass micro-beads, 15% of expanded vermiculite, 7.5% of fly ash, 3% of rock wool and 1.5% of silica fume;
wherein the cement is high-alumina cement, the mesh number of quartz sand is 120 meshes, the hollow glass microspheres are 90 microns, the average size of expanded vermiculite is 2.5mm, the rock wool is rock wool short fiber, the average size is 4mm, the mesh number of silica fume is 500 meshes, the penetrating agent is fatty alcohol polyoxyethylene ether phosphate, the thickening agent is a mineral gel material, and the defoaming agent is an organic ester defoaming agent.
The concrete steps of the preparation method of the thermal insulation mortar of the embodiment can refer to the embodiment 6.
Example 12
The thermal insulation mortar is mainly prepared from the following raw materials: the coating comprises powder, elastic acrylic emulsion, penetrating agent and water, wherein the weight ratio of the powder to the elastic acrylic emulsion to the penetrating agent to the thickening agent to the defoaming agent to the water is 100:25:2:1.2:1: 20;
the powder comprises the following raw materials in parts by weight: 15% of cement, 15% of quartz sand, 15% of mica powder, 5% of attapulgite, 16% of vitrified micro-beads, 8.5% of hollow glass micro-beads, 12% of expanded vermiculite, 9% of fly ash, 3% of rock wool and 1.5% of silica fume;
wherein the cement is high-alumina cement, the mesh number of quartz sand is 150 meshes, the hollow glass microspheres are 90 microns, the average size of expanded vermiculite is 2.5mm, the rock wool is rock wool short fiber, the average size is 3mm, the mesh number of silica fume is 300 meshes, the penetrating agent is fatty alcohol polyoxyethylene ether phosphate, the thickening agent is a mineral gel material, and the defoaming agent is a polyether modified silicon defoaming agent.
The concrete steps of the preparation method of the thermal insulation mortar of the embodiment can refer to the embodiment 6.
Comparative example 1
The thermal insulation mortar provided by the comparative example is the comparative example of example 3, hollow glass beads, expanded vermiculite and rock wool are removed on the basis of the raw materials of example 3, and other components and the use amount are subjected to adaptive adjustment.
The preparation method of the thermal insulation mortar of the comparative example can refer to example 3.
Comparative example 2
The thermal insulation mortar provided by the comparative example is the comparative example of example 3, expanded vermiculite and rock wool are removed on the basis of the raw materials of example 3, and other components and the use amount are subjected to adaptive adjustment.
The preparation method of the thermal insulation mortar of the comparative example can refer to example 3.
Comparative example 3
The thermal insulation mortar provided by the comparative example is the comparative example of example 3, the hollow glass beads and the rock wool are removed on the basis of the raw materials of example 3, and other components and the use amount are subjected to adaptive adjustment.
The preparation method of the thermal insulation mortar of the comparative example can refer to example 3.
Comparative example 4
The thermal insulation mortar provided by the comparative example is the comparative example of example 3, the hollow glass beads and the expanded vermiculite are removed on the basis of the raw materials of example 3, and other components and the use amount are subjected to adaptive adjustment.
The preparation method of the thermal insulation mortar of the comparative example can refer to example 3.
Comparative example 5
The thermal insulation mortar provided by the comparative example is the comparative example of example 4, the fly ash and the silica fume are removed on the basis of the raw material of example 4, and other components and the use amount are subjected to adaptive adjustment.
The preparation method of the thermal insulation mortar of the comparative example can refer to example 4.
Comparative example 6
The thermal insulation mortar provided by the comparative example is the comparative example of example 6, the rock wool is removed on the basis of the raw materials of example 6, and other components and the use amount are subjected to adaptive adjustment.
The preparation method of the thermal insulation mortar of the comparative example can refer to example 6.
Experimental example 1
The performances of the thermal mortars obtained in examples 1 to 12 and comparative examples 1 to 6 were tested, and the specific results are shown in Table 1.
TABLE 1 results of basic property test and heat-insulating effect test of coating films in examples 1 to 12 and comparative examples 1 to 6
As can be seen from Table 1, the thermal mortar of examples 1 to 12 of the present invention has better thermal insulation properties and higher levels of adhesive strength, compressive strength, water resistance and fire resistance than those of comparative examples 1 to 6.
Examples 2 and 3 are comparative tests of example 1, example 2 is a test in which a thickener is added to the raw material of example 1, and example 3 is a test in which a thickener and an antifoaming agent are added to example 1. The thixotropic property and the water retention property of the mortar can be further improved by adding the thickening agent, and the adverse effect of air bubbles on the performance of the mortar can be reduced by adding the defoaming agent. As can also be seen from the data in Table 1, the addition of the thickening agent and the defoaming agent is beneficial to the improvement of the comprehensive performance of the thermal insulation mortar.
Example 5 is a control of example 4, except that the weight fraction of the elastomeric acrylic emulsion is different. As can be seen from Table 1, the amount of the elastic acrylic emulsion has a certain influence on the performance of the thermal mortar.
Comparative examples 1 to 4 are comparative experiments of example 3, and five are different in the kind and amount of the heat-insulating raw material in the raw material of the heat-insulating mortar. The comparison shows that when the heat-insulating raw materials are only vitrified micro bubbles and mica powder (comparative example 1), the heat conductivity coefficient of the heat-insulating mortar is obviously increased, the heat-insulating effect is not good enough, and the bonding strength and the compressive strength of the mortar are reduced in different degrees. This is probably because the vitrified small bubbles are easily broken, resulting in a decrease in the heat insulating effect, the adhesive strength and the compressive strength.
The heat insulation raw materials adopted in the comparative example 2 are vitrified micro bubbles, hollow glass micro bubbles and mica powder, and the hollow glass micro bubbles have low heat conductivity coefficient and good heat insulation effect, are not easy to damage in the transportation, stirring and construction processes, so the heat insulation mortar has positive effect on reducing the heat conductivity coefficient of the heat insulation mortar.
The heat insulation raw materials adopted in the comparative example 3 are vitrified micro bubbles, expanded vermiculite and mica powder, and the data in the table 1 show that the addition of the expanded vermiculite is beneficial to the improvement of the heat insulation performance and the compressive strength of the heat insulation mortar.
The heat preservation raw materials adopted in the comparative example 4 are vitrified micro bubbles, rock wool and mica powder. Rock wool is added into the mortar, so that the heat insulation performance of the mortar is improved, and the fireproof performance of the mortar is improved.
Although the hollow glass beads, the expanded vermiculite and the rock wool all have a certain degree of improvement effect on the heat insulation performance of the heat insulation mortar, the improvement of the heat insulation effect brought by simultaneously adding the heat insulation raw materials into the heat insulation mortar (embodiment 3) is far greater than the sum of the improvement effects of the raw materials. Therefore, the thermal insulation mortar provided by the invention has obvious synergistic effect among the thermal insulation raw materials of vitrified micro bubbles, hollow glass micro bubbles, expanded vermiculite, rock wool and mica powder.
Comparative example 5 is a comparative experiment of example 4, and comparative example 5 does not add fly ash and silica fume based on the raw material of example 4. As can be seen from the data in Table 1, the softening coefficient of the thermal mortar in example 4 is significantly higher than that in comparative example 5, which is mainly because the addition of fly ash and silica fume can enhance the impermeability of the mortar, improve the poor water resistance of the mortar and solve the problem that the mortar is easy to loosen after being soaked in water.
Comparative example 6 is a comparative example of example 6, except that rock wool was added. Example 6 had rock wool added, whereas comparative example 6 had no rock wool added. The influence of rock wool on the heat-insulating mortar is mainly reflected in the fireproof performance of the mortar. The comparison shows that the heat-insulating mortar has good fireproof performance due to the addition of the rock wool.
Comprehensively, the thermal insulation mortar provided by the embodiment of the invention has good thermal insulation performance, and the bonding strength, the compressive strength, the water resistance and the fire resistance of the thermal insulation mortar are also at higher levels.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (12)
1. The thermal insulation mortar is characterized by being mainly prepared from the following raw materials: powder, elastic acrylic emulsion, penetrant and water;
wherein the powder comprises the following raw materials in parts by weight: 15-20% of cement, 15-20% of quartz sand, 15-20% of mica powder, 5-15% of attapulgite, 15-20% of vitrified micro-beads, 8-12% of hollow glass micro-beads, 10-15% of expanded vermiculite, 5-10% of fly ash, 3-5% of rock wool and 1.5-2% of silica fume;
the weight ratio of the powder to the elastic acrylic emulsion to the penetrating agent to the water is 100 (15-25) to (1-2) to (20-30).
2. The thermal mortar of claim 1, further comprising a thickener in an amount of 1% to 2% by weight of the powder.
3. The thermal mortar of claim 1, further comprising an antifoaming agent, wherein the antifoaming agent is 1-2% by weight of the powder.
4. The thermal insulation mortar of claim 1, wherein the thermal insulation mortar is mainly prepared from the following raw materials:
the weight ratio of the powder material to the elastic acrylic emulsion to the penetrating agent to the thickening agent to the defoaming agent to the water is 100 (16-25) to (1-2) to (20-30);
wherein the powder comprises the following raw materials in parts by weight: 15-19% of cement, 15-19% of quartz sand, 15-20% of mica powder, 5-15% of attapulgite, 15-20% of vitrified micro-beads, 8-12% of hollow glass micro-beads, 10-15% of expanded vermiculite, 5-10% of fly ash, 3-5% of rock wool and 1.5-2% of silica fume.
5. The thermal mortar according to any one of claims 1 to 4, wherein the hollow glass beads have a particle size of 90 to 120 μm.
6. The thermal mortar according to any one of claims 1 to 4, wherein the particle size of the fly ash is 100-150 μm.
7. Thermal mortar as claimed in any one of claims 1 to 4, characterised in that the expanded vermiculite has a size of 1 to 5 mm;
the size of the rock wool is 1-5 mm.
8. The thermal mortar of any one of claims 1-4, wherein the cement is one of high alumina cement, white cement, or black cement, or a combination of at least two of them.
9. The thermal mortar as claimed in any one of claims 1 to 4, wherein the quartz sand has a mesh size of 100-200 meshes.
10. The thermal mortar as claimed in any one of claims 1 to 4, wherein the silica fume has a mesh size of 100-500 meshes.
11. The preparation method of the thermal mortar according to any one of claims 1 to 10, comprising the following steps:
(a) uniformly stirring rock wool, a penetrant and water according to the formula ratio to obtain rock wool dispersion liquid;
(b) mixing the elastic acrylic emulsion, the optional defoaming agent and the thickening agent according to the formula ratio, adding the rock wool dispersion liquid, and uniformly stirring to obtain a mixture;
(c) and (b) mixing and stirring the cement, the quartz sand, the mica powder, the attapulgite, the vitrified micro bubbles, the hollow glass micro bubbles, the expanded vermiculite, the fly ash and the silica fume according to the formula ratio, mixing with the mixture obtained in the step (b), adding water and stirring to obtain the thermal insulation mortar.
12. Use of the thermal mortar according to any one of claims 1 to 10 in building construction.
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