Application of silica fume (microsilica) and use in engineering construction

Sanmei micro-silica powder (silica fume) is used in water conservancy and hydropower projects: in the anti-seepage and anti-wearing parts, after incorporating micro-silica powder, it can greatly improve the impermeability, crack resistance, anti-wear and anti-cavitation performance, and prolong The service life of the building. Such as dam seepage concrete panels, intake gates, tunnels, channels, sub-structures of main buildings and other hydraulic structures and structures. The traditional anti-abrasive materials mostly use polymer materials such as epoxy mortar. Although the anti-abrasive ability of these materials is good, the linear expansion coefficient is several times higher than that of the base concrete, and the temperature of the concrete is not well adapted to the natural climatic conditions. It is easy to crack and fall off, and the construction is complicated, toxic and expensive. The use of microsilica powder concrete, the impact resistance is about doubled, and the anti-abrasion ability of the anti-48m/s flow rate is increased by more than 3 times. It has been widely used in water conservancy and hydropower projects such as Three Gorges Power Station, Ertan Power Station, Zipingpu Power Station, Huanghe Xiaolangdi Power Station, Fujian Shuikou Power Station and Qinghai Longyangxia Power Station.
Sanmei micro-silica powder (silica fume) is used to prepare high-strength, high-performance concrete: Silica powder is used as admixture to prepare high-strength concrete. In practical applications, its strength grade can be 100 Mpa. High concrete blended with silicon powder has been applied to offshore oil rigs, long-span bridges, high-rise buildings, tunnels, wear-resistant pavements, and lock chamber floors for hydraulic structures.
Sanmei micro-silica powder (silica fume) is used in seaport engineering and salt water construction project: the inclusion of silicon powder in concrete can improve the anti-wear performance and impermeability of concrete, prevent electrochemical corrosion of steel bars and prolong service life. In underwater engineering, chloride ions penetrate into concrete, causing rapid corrosion of steel bars, delamination of concrete, short life and serious destructiveness. Underwater concrete pouring is generally carried out by a duct method. Due to the loss of the cement slurry, it does not bond well with the base layer and reduces the strength of the portion in contact with water. These problems can be significantly improved after the incorporation of microsilica in underwater concrete. It has been successfully applied in projects such as the Hong Kong Qingma Cross-sea Bridge and the Lianyungang Timber Terminal in Jiangsu.
Sanmei micro-silica powder (silica fume) is used in traffic engineering: Silica 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 repair of highway pavement, it can be opened in advance. Increase economic efficiency; add micro-silica powder to airport runway and apron concrete to extend service life and reduce maintenance.

Sanmei micro-silica powder (silica fume) is used for shotcrete: It significantly improves the adhesion and cohesiveness of plastic concrete, greatly reduces the amount of springback, increases the thickness of shotcrete once formed, shortens the construction period and saves engineering cost. In Europe and the United States, 75% of shotcrete is blended with microsilica, while in Norway and Sweden, microsilica is an essential material for shotcrete.
Sanmei micro-silica powder (silica ash) is used for refractory materials and thermal insulation materials: as an additive to produce amorphous and shaped refractory products, which greatly improve the strength and high temperature performance. The activity of micro-silica powder improves its casting performance and makes it easy to form. Improve production efficiency, become a cementing agent, binder, coagulant, etc. of refractory products; blending micro-silica powder into building mortar can enhance the strength of mortar, reduce cracking and seepage prevention.