Thermal-insulation nanometer cement coating

Abstract

The invention discloses a thermal-insulation nanometer cement coating, which comprises the following raw materials by weight: 40-50 parts of silicate cement, 12-18 parts of modified nanometer silica,10-12 parts of graphite powder, 8-10 parts of nanometer silver-graphene, 3-5 parts of borax, 6-9 parts of a foam stabilizer, 8-10 parts of Fe3O4 nanoparticles, 0.3-0.5 part of an antioxidant, 0.4-0.6part of an antifoaming agent, and 2-4 parts of a filler. According to the present invention, through the synergistic effect of the silicate cement and the modified nanometer silica, the thickening time and the setting time can meet the deep-well cement squeeze construction safety requirements; the graphite powder and the nanometer silver-graphene can improve the penetration ability of the nanometer cement so as to effectively block the deep stratum; through the synergistic effect of the foam stabilizer and the filler, the cement coating has efficient thermal insulation performance; and the material of the coating has advantages of strong weathering resistance, strong adhesion and impact resistance, and the surface hardness is Mohs 6-7, such that the use range is expanded.

Description

technical field [0001] The invention belongs to the technical field of cement coating formulations, and in particular relates to a thermal insulation nano cement coating. Background technique [0002] Cement slurry generally has higher stone body strength, better durability, abundant material sources, convenient slurry preparation, simple operation, and low cost, but the gel time is longer and the diffusion is not easy to control. Chemical slurry has good fluidity, low slurry viscosity, controllable gel, good impermeability and durability, and can be injected into fine cracks, but general chemical slurry is toxic and expensive, and its strength is relatively low. In order to shorten the gel time of cement slurry, accelerators are often used to control the gel time of cement slurry. [0003] Foamed cement is to fully foam the foaming agent mechanically through the foaming system of the foaming machine, and evenly mix the foam with the cement slurry, and then carry out cast-i...

AI Technical Summary

Problems solved by technology

[0004] In a large number of building reinforcement projects, although the diffusion range of the slurry and the initial strength of the cement stones have been improved, the strength and holding temperature of the cement stones have a large attenuation in the middle and late stages. and other shortcomings limit its scope of use