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Description:1. Product name: silicon tiny powder SiO2:85%-90% ,90%-95%,>96% Fe2O3: 0.2%-2.5% Accelerated Pozzolanic Activity: 90% Density Of Silica fume: 550-700kg/m3 2. Cenospheres Product name: cenosphere Features: 1) Cenosphere are hollow ceramic beads arising as a small proportion of the waste ashes from certain coal-burning power stations 2) When disposal of the waste ash by means of settlement pools, cenosphere are floating and gathering on the surface and are known as "floaters" 3) It's a type of light, and nonmetallic material 4) This material has excellent fluidity as well as sound, electric and heat insulation Physical properties: 1) Particle size: 200 - 500