Patent ID: 9688579
Date: 2017-06-27
CPC Classifications: C04B

Claim:
1. A concrete mix design having a slump class from S1 to S5 or a flow class from F1 to F6 and a workability retention between 10 minutes and 120 minutes, comprising: from 150 to 600 kg of cement per cubic meter of concrete, aggregates selected from the group consisting of sand, fine aggregates, coarse aggregates, and combinations thereof containing between 0.5 wt. % and 75 wt. % of phyllosilicates by weight of total aggregates, an admixture system 1 which is based on a 100% polycarboxylate ether based copolymer (PCE), the admixture system 1 comprising at least one component B1 being a PCE copolymer characterized by: the admixture system 1 further comprising at least a second PCE different from the at least one component B1.