ECA MICROSILICA-D

ECA MICROSILICA-D is a dry densified silica fume powder designed to increase concrete compressive and flexural strength, reduce permeability, increase durability and improve hydraulic abrasion/erosion resistance. ECA MICROSILICA-D improves concrete through two mechanisms. The extremely fine silica fume particles are able to fill the microscopic voids between the cement particles, creating a less permeable structure. In addition, the silica fume reacts with the free calcium hydroxide within the concrete to form additional calcium silicate hydrate (glue), producing a tighter paste-to- aggregate bond. ECA MICROSILICA-D can be used to consistently produce high strength concrete with locally available materials and existing methods. It may also be used in precast and prestressed applications where high early strengths are required. The addition of ECA MICROSILICA-D also produces concrete with increased water tightness and dramatically reduced permeability compared to conventional mixes. Reduced permeability is an important advantage in slowing the intrusion of chloride where corrosion of reinforcing steel is a potential problem. Examples are parking garages, bridge decks and concrete in a marine environment. ECA MICROSILICA-D also enhances the durability of concrete against aggressive chemical attack and in hydraulic abrasion/erosion applications.