microsilica composition index-pg电玩城

the particle size of the microsilica is 100 times smaller than that of the cement particles. filling the gap between the cement particles has the same effect as filling the cement particles between the aggregates, increasing the density of the concrete. however, one of the preconditions for the action of microsilica is good dispersion in concrete. the higher the performance of microsilica, the higher the content of active sio2, and the lower the content of other non-sio2 impurities. the following experimental data are provided for reference:

1. activity index test

raw material (g) control the mixing ratio test the mixing ratio of no.525 silicate cement 540486 micromicrosilica 054 soft sand 13501350 water 210225 mortar fluidity (mm) 111-113113-118 folding strength (mpa)10.2111.4628 day compressive strength (mpa

2. influence of microsilica content on mortar strength:

raw material usage (g) 12345 micro microsilica cement 540.0507.6496.8486.0475.2 032.443.254.064.8 standard sand 1350.01350.01350.01350.01350.0 water 238.0238.0238.0238.0238.0 jianshuiji rc00.540.811.081.35 micro microsilica content % 0681012 mortar fluidity mm1361421421431397 day flexural strength (mpa)7.667.567.597.197.19 compressive strength (mpa)52.249.653.050.749.628 day flexural strength (mpa)9.409.689.949.8810.27 compressive strength (mpa)66.070.073.078.084.7

3. concrete strength test:

raw material dosage (kg

in the process of high-temperature smelting of industrial silicon and ferro-silicon, the dust discharged with waste gas is known as silica fume or microsilica. its main component is that the sio2 content in flue gas accounts for about 90% of the total amount of soot, and the free sio2 content is about 10%. the particle degree is very small, and the average particle size is about 0.3a m, so it is called micromicrosilica. it can enter the human alveoli directly through breathing, which is very harmful to human health. at present, china has thousands of silicon iron and industrial silicon electric furnaces. in the production process, the annual production of microsilica is about 250,000 tons. about 50,000 tons can be collected by the environmental protection equipment, and the rest is basically directly discharged into the atmosphere, which not only pollutes the environment but also wastes resources. there is no exact pricing standard for the front-line microsilica, with a price of 1800 ~ 3800 yuan per ton. if the price per ton is calculated as 2,000 yuan, the annual directly discharged microsilica is worth about 500 million yuan as a loss of resource utilization. so the tobacco control must be enforced. collecting microsilica is not only a problem of environmental benefit and social benefit, but also contains great economic benefit and scientific and technological value.