Composition
Are you interested in learning more about 90% Undensified Silica Fume? Contact us today to secure an expert consultation!
Condensed silica fume consists primarily of pure silica in non-crystalline form and contains more than 90% silicon dioxide (Detwiler et al., 1996). Small amounts of magnesium, iron, and alkali oxides are also present. Most particles are smaller than 1 mm with an average diameter of 0.1 mm. ASTM C 1240 limits the percent retained on the 45-mm sieve to 10%, the moisture content to 3%, and the loss on ignition (LOI) to 6%.
Replacement
Condensed silica fume is used as a replacement for portland cement. Silica fume can replace portland cement in the range of 9-15% by mass of cement.
Advantages
Using silica fume concrete creates the following advantages:
Since it has a high surface area, condensed silica fume increases the amount of water needed in the mixture, so it is recommended to use it along with a high-range water-reducing admixture. The condensed silica fume/portland cement mixture must be protected for the first 7 days from drying shrinkage. To optimize the benefits resulting from the use of condensed silica fume, it must be thoroughly dispersed in the cement mixture. A disadvantage to utilizing silica fume in cement is the cost. Condensed silica fume costs from $400-$1,000/ton, which is significantly higher than portland cement ($90/ton). When using this or any other alternative cementing material with portland cement, it is necessary to create trial mixtures to ensure proper proportioning for the desired properties.
References
If you want to learn more, please visit our website 85% Densified Silica Fume.
The main component of the condensed silica fume is amorphous silica, and the furnace gas is also entrapped with impurities, such as free C, Fe2O3, CaO, K2O, Na2O and so on.
Its price is $ 150-800 per ton
It is comprehensive utilization of waste, so the price is very low.
It can be devided into Undensified Silica Fume (320-360kg/m3) and Densified Silica Fume (630-680 kg/m3).
The densified microsilica price is higher than undensified, because this kind of product need to be proceed by densified equipment.
If you want to know the detailed silica fume price, please tell us your needed microsilica, densified or undensified, bulk density, your needed quantity and application. We will provide you the detailed quote by E-mail sales@superior-abrasives.com. Thank you.
If you are looking for more details, kindly visit 94% Densified Silica Fume.