The application of Microsilica fume in engineering construction

Microsilica fume is used in water conservancy and hydropower projects: in anti-seepage and anti-punching parts, adding Microsilica fume can greatly improve anti-seepage, anti-cracking, anti-punching, anti-cavitation performance, and prolong the service life of the building. Such as dam anti-seepage concrete panels, sluice, tunnel, channel, the main plant under the structure of hydraulic buildings and structures.

Traditional anti-abrasion materials are mainly epoxy mortar and other polymer materials. Although this kind of material has good anti-abrasion ability, it is easy to crack and fall off under natural climate conditions because its linear expansion coefficient is several times as much as that of the base common concrete, and the temperature of the base concrete does not adapt well. Besides, the construction is complex, toxic and expensive. However, the abrasion resistance of micro-silica concrete is doubled, and the abrasion resistance of 48m/s flow rate is more than 3 times.

Microsilica fume is used to prepare high-strength and high-performance concrete: Microsilica fume is used as admixture to prepare high-strength concrete. In practical application, its strength grade can reach 100 Mpa. High concrete doped with microsilica fume has been used in offshore oil drilling platforms, long-span Bridges, high-rise buildings, tunnels, abrasion-resistant road surfaces and floor slabs of hydraulic structures.

Microsilica fume is used in harbour engineering and salt water construction engineering: adding microsilica fume into concrete can improve the anti-scouring and anti-permeability performance of concrete, prevent electrochemical corrosion of reinforcement, and prolong its service life. In underwater engineering, chloride ion permeates into concrete, which leads to rapid corrosion of reinforcement and delamination of concrete, resulting in short life and serious damage. The ducting method is generally used for underwater concrete pouring. Due to the loss of cement slurry, it can not bond well with the base and reduce the strength of the part in contact with water. These problems can be improved obviously by adding microsilica fume into underwater concrete.

Microsilica fume is used in traffic engineering: Microsilica fume concrete is used in highway pavement and airstrip, which can greatly improve the early strength and wear resistance of concrete. In the maintenance and rush repair of highway pavement, it can advance the opening time and increase economic benefits. Adding microsilica fume to the concrete of airport runways and tarmac can extend the service life and reduce maintenance.

Microsilica fume used in shotcrete: it significantly improves the adhesion and cohesion of plastic concrete, greatly reduces the amount of springback, increases the thickness of shotcrete in one forming, shortens the construction period, and saves the project cost. In Europe and the United States, 75 percent of shotcrete are mixed with microsilica fume, while in Norway and Sweden, Microsilica fume is a necessary material for shotcrete.

Microsilica fume used in refractory materials, insulation materials: as an additive production of amorphous and shaped refractory products, so that its strength, high temperature performance greatly improved, Microsilica fume activity to improve its casting performance, easy to shape, improve production efficiency, become the refractories, binder, coagulant; Adding microsilica fume in building mortar can enhance the strength of mortar, reduce cracking and prevent seepage.