Method for preparing temperature-control energy-saving heat-preservation material from waste concrete

Abstract

The invention discloses a method for preparing a temperature-control energy-saving heat-preservation material from waste concrete. The method comprises the following steps: selecting a rectangular hollow plastic plate of which both ends are opened, and blocking one opened end by using polyurethane; injecting a liquid phase-change material into the rectangular hollow plastic plate; stuffing the other opened end of the rectangular hollow plastic plate by using cotton yarns sufficiently soaked in polyurethane, performing curing, and performing blocking; crushing waste concrete so as to obtain a regenerated fine aggregate and regenerated granules, and mixing the regenerated fine aggregate, the regenerated granules, ordinary Portland cement and other materials so as to form an inorganic foamedheat-preservation material; and finally putting the inorganic foamed heat-preservation material, a rectangular airbag and the rectangular hollow plastic plate into a prefabricated mold plate, and performing room-temperature curing till a stage age, so as to finally obtain the temperature-control energy-saving heat-preservation material. The building heat-preservation material not only is capable of recycling and reusing the waste concrete, but also has the advantages of being small in self weight, good in thermal insulation and possible in self temperature control.

Description

technical field [0001] The invention relates to a method for preparing building insulation materials, in particular to a method for preparing temperature-controlling and energy-saving insulation materials by using waste concrete. Background technique [0002] In order to improve the ecological, social and economic benefits of construction projects, there are more and more green buildings and energy-saving buildings nationwide. Since building energy consumption accounts for about 30% of the total energy consumption of the society, reducing building energy consumption can play a role in environmental protection and energy saving for the society as a whole. In building energy consumption, the building envelope accounts for about 70% to 80%. Therefore, it is extremely critical to improve the thermal insulation performance of the building envelope. In addition, a large amount of waste concrete is produced after the demolition of urban buildings. It is estimated that by 2020, t...

AI Technical Summary

Problems solved by technology

The Chinese invention patent with the application number 201811560304.8 discloses a construction waste regenerated insulation brick and its preparation method. In this method, the construction waste regenerated material, cement, quicklime, modified diatomite, lignocellulose and the remaining water are mixed in a certain proportion mixed to obtain construction waste regenerated insulation bricks. Although it realizes the reuse of waste concrete, its thermal insulation performance is still far behind that of organic thermal insulation materials, and the deadweight of the recycled insulation bricks is , does not have the ability to control temperature