Composite thermal insulation mortar and manufacturing method thereof

A technology of composite thermal insulation mortar and cement, which is applied in the field of building materials, can solve problems such as poor thermal insulation performance of thermal insulation mortar, and achieve the effects of improving energy saving, crack resistance, and promoting utilization

Inactive Publication Date: 2014-09-10
SICHUAN INSITITUTE OF BUILDING RES
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AI-Extracted Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a composite thermal insulation mortar and its preparation method, to solve th...
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Abstract

The invention discloses composite thermal insulation mortar which solves the problem that the thermal insulation property of existing thermal insulation mortar is not good and achieves recycling of crop straws. The composite thermal insulation mortar is composed of, by weight, 70-80 parts of cement, 10-15 parts of coal ash, 5-20 parts of calcium hydroxide, 10-20 parts of rice straw fibers, 30-40 parts of glass beads, 0.5-0.8 part of cellulose ether, 0.1-0.2 part of starch ether, 0.01-0.05 part of air entraining agents, 1-4 parts of emulsion powder and 150-190 parts of water, wherein the cement, the coal ash and the calcium hydroxide account for 100 parts. According to the composite thermal insulation mortar, the crop straws are fully utilized and recycled; meanwhile, the rice straw fibers of agricultural waste and the coal ash of industrial waste can be utilized, and the composite thermal insulation mortar is environmentally friendly, low in energy consumption and capable of being widely applied to thermal insulation of internal walls and external walls of buildings.

Application Domain

Technology Topic

Examples

  • Experimental program(4)

Example Embodiment

[0021] Example 1
[0022] A composite thermal insulation mortar is composed of the following raw materials by weight: 72 parts of cement, 13 parts of fly ash, 15 parts of calcium hydroxide, 10 parts of rice straw fibers, 40 parts of vitrified microbeads, 0.6 parts of cellulose ether, 0.14 parts of starch ether, 0.04 parts of air-entraining agent, 2 parts of latex powder, 150 parts of water. The preparation method is as follows:
[0023] (1) Dry mix the above-mentioned parts by weight of cement, fly ash, calcium hydroxide, cellulose ether, starch ether, air-entraining agent and latex powder to a uniform state to obtain a dry powder;
[0024] (2) Mix the above-mentioned parts by weight of rice straw fibers and vitrified microbeads to a uniform state to obtain a mixture;
[0025] (3) Add the above-mentioned parts by weight of water into the mixer, then add the dry powder to the mixer and stir for 50-100s, finally add the mixture to the mixer, and mechanically stir for 1.5-3min to obtain the product.
[0026] The dry bulk density of the thermal insulation mortar of this embodiment is 341kg/m 3 , The compressive strength is 0.56MPa, the thermal conductivity system is 0.081W/(m·K), the bonding strength is 0.04MPa, the softening system is 0.62, the 48h water absorption rate is 49%, and the 28d linear shrinkage rate is 0.07%.

Example Embodiment

[0027] Example 2
[0028] A composite thermal insulation mortar is composed of the following raw materials in parts by weight: 78 parts by weight of cement, 10 parts by fly ash, 12 parts by calcium hydroxide, 15 parts by rice straw fiber, 35 parts by vitrified microbeads, 0.5 parts by cellulose ether, 0.14 parts of starch ether, 0.04 parts of air-entraining agent, 3 parts of latex powder, 172 parts of water. The preparation method is as follows:
[0029] (1) Dry mix the above-mentioned parts by weight of cement, fly ash, calcium hydroxide, cellulose ether, starch ether, air-entraining agent and latex powder to a uniform state to obtain a dry powder;
[0030] (2) Mix the above-mentioned parts by weight of rice straw fibers and vitrified microbeads to a uniform state to obtain a mixture;
[0031] (3) Add the above-mentioned parts by weight of water into the mixer, then add the dry powder to the mixer and stir for 60 seconds. Finally, add the mixture to the mixer and perform mechanical stirring for 2 minutes to obtain the product.
[0032] The dry bulk density of the thermal insulation mortar of this embodiment is 354kg/m 3 , The compressive strength is 0.52MPa, the thermal conductivity system is 0.080W/(m·K), the bonding strength is 0.03MPa, the softening system is 0.60, the 48h water absorption rate is 51%, and the 28d linear shrinkage rate is 0.08%.

Example Embodiment

[0033] Example 3
[0034] A composite thermal insulation mortar is composed of the following raw materials in parts by weight: 71 parts by weight of cement, 13 parts by fly ash, 16 parts by calcium hydroxide, 20 parts by rice straw fiber, 30 parts by vitrified microbeads, 0.7 parts by cellulose ether, 0.10 parts of starch ether, 0.05 parts of air-entraining agent, 3 parts of latex powder, 182 parts of water. The preparation method is the same as in Example 2.
[0035] The dry bulk density of the thermal insulation mortar of this embodiment is 359kg/m 3 , The compressive strength is 0.43MPa, the thermal conductivity system is 0.078W/(m·K), the bonding strength is 0.03MPa, the softening system is 0.55, the 48h water absorption rate is 53%, and the 28d linear shrinkage rate is 0.10%.
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PUM

PropertyMeasurementUnit
Bulk density341.0kg/m³
Compressive strength0.56MPa
Bond strength0.04MPa
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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