Product Specifications
| Prod Model: |
Silica fume in concrete industry application |
| Markets: |
North America,Eastern Europe,Southeast Asia,Mid East |
| Heat Of Hydration: |
Moderate Heat |
| Color: |
Grey |
| Type: |
Portland Pozzolana Cement |
| Mineral Composition: |
Portland Cement |
| Function: |
Special Cement |
Product Description
Silica Fume Concrete
Silica fume is used in concrete.
When it is used in concrete, it acts as a filler and as a cementitious material. The small silica fume particles fill spaces between cement particles and between the cement past matrix and aggregate particles. The silica fume also combines with calcium hydroxide to form additional calcium hydrate through the pozzolanic reaction. Both of these actions result in a denser, stronger and less permeable material.
Silica Fume has been used as an addition to concrete up to 15 percent by weight of cement, although the normal proportion is 7 to 10 percent. With an addition of 15 percent, the potential exists for very strong, brittle concrete. It increases the water demand in a concrete mix; However, dosage rates of less than 5 percent will not typically require a water reducer. High replacement rates will require the use of a high range water reducer.
Function of adding Silica Fume(microsilica):
Increase durability
Reduces concrete permeability
Improves resistance to corrosion
Shotcrete - lower rebound
Micro silica fume can be used in a variety of cementation products, such as concrete, grouts, and mortars as well as elastomeric, polymer, refractory, ceramic and rubber applications.
HS No.: 28112200 China Origin, micro silica fume meets the requirements of ASTM C-1240.
Micro silica fume CAS #: 69012-64-2
