Abstract
In order to solve the shortcomings of the traditional organic thermal insulation material, the ordinary portland cement is modified firstly. Although organic insulation material is lighter in texture and better in thermal insulation, it is very flammable. In addition, the insulation property of inorganic insulation material is insufficient. When the content of high alumina cement is 20 parts and the content of Li2CO3 is 3 parts, the initial setting time of the high alumina cement – ordinary portland cement composite system is the shortest. The time is 12min and 22min, which is close to the gas-bubble stabilization time. Then the effect of polypropylene addition on the properties of composite cement is studied. The results show that the optimum performance of the cement foam insulation material is best when the polypropylene fiber content is 2%. The compressive strength is 0.619MPa, the bulk density is 285kg/m3, the water absorption is 15.4%, and the thermal conductivity is 0.079w/mk. In conclusion, this kind of material belongs to grade A non-combustible material.
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