Crack-resistant high thermal conductivity mortar and preparation method and application thereof

Abstract

The invention discloses crack-resistant high thermal conductivity mortar and a preparation method and application thereof and belongs to the technical field of building materials. The crack-resistanthigh thermal conductivity mortar comprises cement, filled aggregates, thermal conductive materials, carbon fibers and additives according to a weight ratio of the cement, filled aggregate to thermal conductive material of 1: (0.7-1.0): (0.5-0.8). The carbon fiber weight is 0.05-0.5% the total weight of the cement, filled aggregates and heat conductive materials, and the additive weight is 0.8 to 1.5% the total weight of the cement, filled aggregates and heat conductive materials. The crack-resistant high thermal conductivity mortar has good toughness, strong impact resistance and fast heat conduction. The preparation method has simple processes and realizes a low cost. In underfloor heating, the crack-resistant high thermal conductivity mortar has a fast heat conduction rate, uniform heatdistribution, corrosion resistance and a long anticorrosion service life. The crack-resistant high thermal conductivity mortar utilizes tailing sand and quartz sand as the filled aggregates and the iron scraps, aluminum scraps or steel slag powder and graphite powder as the heat conductive materials so that the wastes are recycled, a production cost is reduced and benefits are improved.

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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