A kind of anti-cracking high thermal conductivity mortar and its preparation method and application

Abstract

The invention discloses a crack-resistant high thermal conductivity mortar as well as its preparation method and application, belonging to the technical field of building materials. The crack-resistant high thermal conductivity mortar includes the following components: cement, filler aggregate, thermal conductivity material, carbon fiber, and admixture; wherein, the weight ratio of the cement, filler aggregate, and thermal conductivity material is 1: (0.7-1.0): ( 0.5 to 0.8), the weight of the carbon fiber is 0.05 to 0.5% of the total weight of the cement, filled aggregate, and thermally conductive material, and the weight of the admixture is 0.8 to 1.5% of the total weight of the cement, filled aggregate, and thermally conductive material %. The anti-cracking high thermal conductivity mortar has good toughness, strong impact resistance and fast heat conduction; its preparation method is simple and low in cost; when used in floor heating, it has fast heat conduction, uniform heat distribution, and long corrosion-resistant service life. And the anti-cracking high thermal conductivity mortar uses tailings sand and quartz sand as filler aggregate, and uses iron filings, aluminum filings or steel slag powder and graphite powder as thermal conductivity materials, which realizes waste utilization, reduces production costs and improves efficiency.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a crack-resistant high thermal conductivity mortar and its preparation method and application. Background technique [0002] At present, in floor heating projects, the heat soaking film used in the traditional process is an aluminum film. Although the aluminum film conducts heat quickly, first of all, because the concrete or mortar covering the aluminum film contains active ions Cl -1 , and Cl -1 It will corrode the aluminum film. After 3 to 5 months of actual use, the aluminum film will be completely corroded, lose its thermal conductivity, and fail to achieve the effect of heat transfer and uniform heat; secondly, due to the current advanced floor heating panels, especially thin floor heating There are grooves for laying pipes, and the aluminum film is difficult to fit into the groove. The aluminum film that is too thin has poor thermal conductivity, and the aluminu...

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Problems solved by technology

[0002] At present, in floor heating projects, the heat soaking film used in the traditional process is an aluminum film. Although the aluminum film conducts heat quickly, first of all, because the concrete or mortar covering the aluminum film contains active ions Cl -1 , and Cl -1 It will corrode the aluminum film. After 3 to 5 months of actual use, the aluminum film will be completely corroded, lose its thermal conductivity, and fail to achieve the effect of heat transfer and uniform heat; secondly, due to the current advanced floor heating panels, especially thin floor heating There are grooves for laying pipes, and the aluminum film is difficult to fit into the groove. The aluminum film that is too thin has poor thermal conductivity, and the aluminum film that is too thick is more difficult to insert into the groove, resulting in poor paving effect; again , the aluminum film is expensive, which greatly increases the cost of the floor heating system. The reflective film is often used in the market instead of the aluminum film as a heat soaking film, but the reflective film is coated with a reflective coating on the plastic. Even if it starts to reflect, it will not last for a while. It will also be corroded by active ions, and floor heating will no longer have the advantage of comfort

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