Micro-Silica Fume Use In Concrete

 1, Micro-silica fume is a physical nature, chemical properties and they are very stable neutral inorganic filler, without crystal water, do not participate in curing reaction, does not affect the reaction mechanism.

2. The various types of resin has a good wetting, adsorption performance is good, easy to mix, do not produce agglomeration.

3. Micro-silica fume size distribution of reasonable size, strong density, hardness, wear resistance, can greatly improve the curing of the tensile, compression, impact strength and wear resistance, anti-abrasion ability can be increased by 0.5 -2.5 times.

4. It can increase the thermal conductivity, change the adhesion and increase the flame retardant properties.

5. It can reduce the epoxy resin curing reaction exothermic peak temperature, reduce the linear expansion coefficient of cured products and curing shrinkage, thereby eliminating the internal stress to prevent cracking.

6. Due to micro-silica fume fine particle size, reasonable distribution, can effectively reduce and eliminate precipitation, stratification phenomenon.

7. Micro-silica powder pure, low impurity content, material and stable performance, so that the cured material has good insulation properties and anti-arc performance.

8. Micro-silica fume chemical composition of silica (SiO2), is an inert substance, and most of the acid, alkali can’t afford chemical reaction, micro-silica fume evenly distributed, covering the surface of the object, with strong corrosion resistance, Anti-cavitation ability to improve 3-16 times.

9. Micro-silica fume, the bulk density is small: one between 0.2-0.8, one between 1.0-2.2. As a polymer filler, it is less expensive than other mineral fillers, has a small loading weight, and saves the amount of polymer, thus reducing the cost of the product.

10. Frost resistance: micro-silica fume after 300-500 times through the rapid freezing cycle, the relative elastic modulus of low 10-20%, while the ordinary concrete through 25-50 cycles, the relative elastic modulus of low to 30- 73%. The frost resistance of concrete can be improved.

11. Early strength: micro-silica fume concrete to shorten the induction period, with early strength characteristics. These features are very good!