Phase change gypsum board for construction

Abstract

The invention discloses a phase change gypsum board for construction. The gypsum board includes, by weight, 40-70 parts of gypsum powder, 40-100 parts of a phase change material compound, 20-60 partsof expanded slag lightweight aggregate, 0.5-2 parts of a chopped fiber, 1-5 parts of a water reducing agent, and 60-150 parts of water; the phase change material compound includes, by weight, 90-110 parts of a phase change material, 20-40 parts of montmorillonite, and 100-300 parts of water; the phase change material includes one or more of an aliphatic hydrocarbon compound, an alcohol compound oran ester compound; the aliphatic hydrocarbon compound is selected from one or more of N-hexadecane, n-octadecane or eicosane; the alcohol compound is selected from one or more of dodecyl alcohol, cyclohexanol, tert-butyl alcohol or neopentylene glycol; and the ester compound is n-butyl stearate. The gypsum board is good in product mechanical strength, large in energy storage density and suitablefor energy-saving insulation materials of assembly type buildings, and the fireproof grade of the gypsum board can reach an A1 grade.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a phase-change gypsum board for building. Background technique [0002] On November 14, 2015, the Ministry of Housing and Urban-Rural Development issued the "Outline for the Modernization of the Construction Industry." It is planned that by 2020, prefabricated buildings will account for more than 20% of new buildings, and by 2025, prefabricated buildings will account for more than 50% of new buildings; September 2009 In March, the "Interim Regulations on Fire Protection of External Wall Thermal Insulation System and External Wall Decoration of Civil Buildings" was promulgated and implemented, and the fire protection level of building thermal insulation materials is required to reach Class A. The components of the prefabricated building are prefabricated in the factory, and the insulation system is also integrated in the components. Therefore, it is impossible to use the insulati...

AI Technical Summary

Problems solved by technology

At present, there are more researches on microcapsule phase change materials and porous or layered phase change materials. Capsule technology can effectively solve the leakage problem during the phase change process, but most capsule materials are polymer substances with poor thermal conductivity. Reduced heat storage density and thermal performance of phase change materials

Porous or layered media include gypsum, bentonite, expanded perlite, porous concrete, etc., which can effectively prevent liquid leakage and have high heat transfer efficiency, but the energy storage density is low

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