Thermal insulation material and preparation method thereof

[0052] The preparation method of the thermal insulation material of the present invention comprises the step of forming the skeleton of the cement-based block and the step of filling and molding.

[0053] The steps for forming the cement-based block skeleton of the present invention are as follows: uniformly mix cement, fly ash, cement foaming agent, foam stabilizer, early strength agent, water reducing agent and water to obtain slurry, and pour the slurry into Forming in the mold, static foaming, demoulding and curing, thereby forming a cement-based block skeleton with multiple cavities. The types and amounts of the above-mentioned raw materials are as described above, and will not be repeated here. The method of mixing is not particularly limited. For example, these raw materials are mixed in a high-speed mixer to form a slurry. The mold depends on actual needs, but it needs to be able to form multiple cavities. The time for static foaming can be controlled at 10 to 30 ho...

[0060] (1) Stir and mix 60 parts by weight of cement and 30 parts by weight of fly ash with a high-speed mixer, add 3 parts by weight of cement foaming agent, 1.6 parts by weight of foam stabilizer, 0.8 parts by weight of early strength agent, and 0.6 parts by weight of water reducing agent The mixed solution formed with 50 parts by weight of water was stirred at a high speed to obtain a slurry, which was poured into block forming molds of various shapes and left to foam for 12 hours, demoulded, and cured for 10 days to obtain a cement-based block skeleton with a cavity. During the curing period, the surface of the product must be kept moist to ensure that the product reaches its final strength.

[0061] (2) Melting and blending 10 parts by weight of polystyrene resin and 5 parts by weight of graphene through a twin-screw extruder at 135°C, adding an alkane foaming agent, extruding under high pressure and injecting it into the cavity of the cement-based block skeleton, Compres...