Conspeed Special is an accelerating water-reducing admixture based on modified calcium chloride, designed to accelerate setting time by increasing the density and aiding the hydration reaction with calcium chloride. It conforms to BS 5075 : Part 1 : 1982 and ASTM C494-80 Type E.

Special Properties

• Speeds up the initial setting time, thus , enabling formworks to be removed earlier and re-used.
• Enables the production of workable, high early strength, higher density concrete with reduced tendency to segregate, bleed and creep.
• Aids compaction and the production of clear faced concrete.

Application

• Conspeed Special is of particular value to the precast concrete industry where it is necessary for concrete to set more rapidly for greater productivity.
• Standard mix design methods may be used, reducing the cement content by Approximately 10% when compared with plain concrete at equivalent work ability. With harsh aggregates or gap-graded mixes, the cement reduction may be less than 10%; however, a marked improvement in cohesion will be achieved with reduced segregation and bleeding.