how does microsilica improve the properties of cement or concrete-pg电玩城

microsilica is a promising material in the field of high and new technology at home and abroad. used in cement or concrete can improve the performance of cement or concrete, dispensing with ultra high, high strength, wear resistance, scouring resistance, corrosion resistance, infiltration resistance, frost resistance, special concrete or composite cement early strength, to adapt to the oil well cementing, marine oil drilling platform, harbor wharf, iron road bridge highway, airport runway, tunnel and the special requirements of city high-rise buildings and other projects; it is used in rubber to improve the rubber's extensibility, tear resistance and tensile strength. used in refractories and ceramics to improve the strength and durability of products.

microsilica can improve the permeability and salt corrosion resistance of concrete and protect the steel bar. in underwater engineering, chlorine ions infiltrate into concrete, causing rapid corrosion of steel bar, concrete delamination, short life and serious damage. the method of catheter is generally used for underwater concrete pouring. as the cement slurry is lost, it cannot bond well with the base and reduces the strength of the contact part with water. these problems can be obviously improved by adding silica powder into underwater concrete.

concrete is a permeable material whose permeability is related to its porosity, pore distribution and pore connectivity. the smaller the water cement ratio, the longer the curing period, the less permeability. the addition of an air entrainer into the concrete also reduces permeability. generally, concrete with water-cement ratio less than 0.50 can have a penetration coefficient of 1 x 10-11m/s.

the permeability of concrete in sea water is the most important factor to determine the durability of concrete engineering. micro microsilica, the particles are small, 20 ~ 100 times smaller than that of cement particles, can fill the gap between the cement particles, made of concrete, the secondary hydration of micro microsilica at the same time, new product clogging in the concrete seepage channels, so the micro microsilica concrete impermeability ability is very strong, the permeability of concrete increases with the increase of water cement ratio, this is because the density of water cement ratio of concrete is relatively less.

the high - speed water - flow drainage material in hydraulic structure has high anti - abrasion and anti - cavitation requirements. adding microsilica into concrete can improve the abrasion resistance of concrete. adding microsilica to improve the abrasion resistance of concrete is due to the improvement of the abrasion resistance and hardness of slurry itself, as well as the improvement of cement cement aggregate interface bonding, so that rough aggregate is difficult to be eroded when subjected to wear.