Supplementary Cementitious Materials / Silica Fume Silurry (Silurry 400)
Silurry 400 is a suspension of microsilica in water used to enhance the strength and durability of concrete. This product, with its strong pozzolanic properties, reacts with calcium hydroxide resulting from hydration. The secondary products of this pozzolanic reaction reduce the permeability of concrete and enhance its mechanical strength and abrasion resistance.
The microsilica present in this product complies with the general requirements of the Iranian National Standard No. 13278 as well as the specifications outlined in ASTM C1240 and EN 13263-1 standards.
Permissible Range for Using Silurry in Concrete:
The permissible range for the use of Silurry 400 is from 6 to 14 percent by weight of cementitious materials (6 to 14 kilograms per hundred kilograms of cementitious materials, including cement, silica fume, slag, fly ash, and other similar pozzolans). The optimal amount of this admixture should be determined based on the mix design specifications, operational conditions, climate, and ultimately by producing trial mixes. If reactive silica-bearing aggregates are present in the concrete, the minimum usage amount of the product in the laboratory should be determined.
How to Mix Silurry with concrete:
Silurry 500 should be added to the concrete ingredients at the concrete production site (batching) and during the mixing process. It is necessary to observe the following points:
After adding this product, the concrete should be thoroughly mixed for 2 to 5 minutes to ensure the uniform distribution of the additive in the concrete.
Approximately 50% of the weight of this product should be subtracted from the mixing water of the concrete.