Micro Silica powder (Silica Fume) Grout How To Prevent Corrosion?

The surface of the grout structure is coated with corrosion-resistant coatings, commonly used coatings are chlorosulfonated polyethylene anti-acid and alkali coatings. Asphalt paint, epoxy coating, coal tar and other anti-corrosion materials.

1. According to the nature of the project selection of high-quality cement. 

In the water level changes, many times dry and wet alternation or freeze and thaw parts of the structure, it is appropriate to use sulfur-resistant alumina cement, slag cement or high alumina cement, or the use of tricalcium aluminate content of less than 6% strength grade 42.5 of the silicate cement or ordinary silicate cement, to improve the structural design of the intensity level, micro silica powder grout strength level is generally not less than C30, to increase the denseness of the micro silica powder grout, per m3 of grout Cement dosage of more than 350kg, the use of secondary aggregates, sand rate of more than 38% of the water-cement ratio of less than 0.50, mixed with water-reducing agent and aerating agent to improve the degree of compactness, to prevent the early freezing and shall not be used for steam maintenance.

2. Micro silica powder grout according to the type of construction and underground corrosion type. 

Choose acid-resistant or alkali-resistant aggregates which wow dioxide content is higher the better the acid resistance, such as commonly used granite, basalt and quartzite acid-resistant stone, calcium oxide, magnesium oxide content is high dear to see the performance is good, such as dolomite, limestone and marble.

3. Thickened steel protective layer.

There are corrosive underground parts of the protective thickness should be increased than the design of 5-15mm, in order to resist external erosion for a longer period of time.

The outside of the structure to take the coating package anti-corrosion:

4. Coating anticorrosion.

 The surface of the grout structure is coated with corrosion-resistant coatings, commonly used coatings are chlorosulfonated polyethylene anti-acid and alkali coatings. Asphalt paint, epoxy coating, coal tar and other anti-corrosion materials.