TamCem 23 is a new generation superplasticiser for concrete. It contains polycarboxylate ether polymers and is specially formulated to give exceptionally high water reduction and impact extreme workability and slump retention. It is a non-chloride liquid admixture which has been formulated to comply with the requirements of ASTM C 494 for Type G water-reducing, high range and retarding admixtures. It fully meets the requirements of BS5075: Part 3: 1985 for retarding superplasticising admixtures and JIS A6204 “Chemical Admixtures for Concrete”. It is compatible with all cements meeting recognised international standards.
TamCem 23 performs two key functions in concrete & mortar: it allows significant water reduction without losing workability and it significantly increases the slump without the need to increase the water content.
Using water to increase the workability of concrete can severely weaken the setting strength. TamCem 23 polycarboxylate polymer disperses cement by combining the traditional effect of electrostatic repulsion with ‘steric hindrance’ facilitated by the molecular structure of polycarboxylate ether-based technology. This provides greater dispersion compared to electric only repulsion from those conventional BNS and SMF based superplasticisers.
TamCem 23 requires lower dosage compared to conventional superplasticisers but provides extreme workability characteristics for high slump, flowable, self consolidating concrete. It also exhibits greatly reduced water demand and by increasing the density of side chain grafts improves slump retention.