Lightweight self-thermal-insulation building blocks
A self-insulating block and light-weight technology, which is applied in the field of materials, can solve the problems that the strength and thermal conductivity of masonry materials cannot be guaranteed at the same time, reduce the self-weight of self-insulating blocks, etc., and achieve obvious land saving effects, reduce self-weight, and save time Effect
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[0032] The preparation method of the modified wheat straw is as follows: dry the wheat straw, pulverize it with a pulverizer, take the wheat straw powder passed through a 120 mesh sieve, add a sodium hydroxide solution 15-20 times the mass of the wheat straw powder, Stand and soak for 18-20 hours, filter with suction, discard the filtrate, wash the remaining solid with water until it is neutral, and dry it at 50-60°C. Wheat straw powder, add N,N-dimethylformamide DMF 40-45 times the mass of the pretreated wheat straw powder, stir for 30-40min, continue stirring and add maleic anhydride MA, the maleic anhydride MA: The mass ratio of pretreated wheat straw powder is 0.75-0.8:1, and then the temperature is raised to 100-110°C for reaction. The reaction process is kept stirring. After 2-6 hours of reaction, the product is cooled to room temperature, filtered to remove the filtrate, and the filtered After washing the remaining solids for 3-4 times, put them into an oven for drying ...
Embodiment 1
[0040] Example 1 Lightweight self-insulating block of the present invention
[0041] A light-weight self-insulating building block, comprising the following raw materials: 50 parts by mass of Yellow River cement, 42 parts by mass of quartz sand silt, 3.5 parts by mass of nano-polytetrafluoroethylene (Shanghai Guangbin Trading Co., Ltd.), 1.5 parts by mass of zinc oxide, Hafnium dioxide HfO 2 0.5 parts by mass (CAS No.12055-23-1, Shanghai Huzhen Industrial Co., Ltd.), 0.8 parts by mass of titanium carbide TIC (CAS No.12070-08-5, Qinhuangdao Yinuo High-tech Material Development Co., Ltd.), nitriding 0.3 parts by mass of tantalum TaN (CAS No.12033-62-4, (Codow Kedao) Guangzhou Hewei Chemical Co., Ltd.), 2.5 parts by mass of glass beads (Yongqing County Haiyu Glass Beads Co., Ltd.), mixed solution 40 mass parts, account for additive one of mixed solution one quality 2.3wt% and account for mixed solution one quality additive two of 0.026wt%; In mixed solution one, include acrylic ...
Embodiment 2
[0053] A lightweight self-insulating building block, which includes the following raw materials: 52 parts by mass of Yellow River cement, 44 parts by mass of quartz sand silt, 2.5 parts by mass of nano-polytetrafluoroethylene, 1.2 parts by mass of zinc oxide, Hafnium HfO 20.3 parts by mass, 0.9 parts by mass of titanium carbide TIC, 0.5 parts by mass of tantalum nitride TaN, 3.0 parts by mass of glass microspheres, 35 parts by mass of mixed solution, additives accounting for 2.5 wt% of mixed solution-mass and accounted for mixed solution Additive 2 with a mass of 0.022 wt%; said mixed solution 1 includes acrylic acid, polyvinyl alcohol PVA, modified wheat straw and water.
[0054] Mixed solution one, wherein acrylic acid is partially neutralized acrylic acid, and the neutralization degree of acrylic acid is 60%.
[0055] In mixed solution 1, based on unneutralized acrylic acid, the mass ratio of acrylic acid: polyvinyl alcohol PVA: modified wheat straw: water is 30:4:7:70.
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