Research Of Insulation And Energy-Saving Materials Based On Construction Waste

Silicate and common construction waste were adopted as main materials, a new generation of lightweight, high strength and low-cost silicate-based insulation and energy-saving materials which based on construction waste system was developed through the way of in-situ self-assembly. For optimizing the synthesis performance of silicate insulation and energy-saving materials based on construction waste system, influence factors of its thermal property, relationship between different materials, material structure and mechanical property were studied. Aiming at thermal property, the variation regularity of thermal conductivity under the conditions of different densities, different pore sizes of silicate-based insulation and energy-saving materials; to the mechanical property, the influence of cementing materials, filler materials, construction wastes, reinforcing fibers and admixtures on its compressive strength was discussed, and the model of porous materials’pore structure is established.According to the reality of civilian building energy conservation technology demands, this thesis combined thermal property and mechanical property together, optimum ratio of heat preservation material of construction waste system is obtained:adopting in-situ self-assembly technology as preparation method, ration for rapid-hardening sulphoaluminate cement and silicate cement is4:1, content of fly ash is6%, content of surfactant is0.7%, use19mm PP fiber as reinforcing material, content of PP fiber is0.5%. Under this condition, the silicate-based insulation and energy-saving materials manufactured average thermal conductivity is0.067W/(m· K), compressive strength is0.65MPa, it has great value in dealing with so many domestic construction wastes and pushing process of our country’s building energy conservation.