| 摘要 |
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 or combinations thereof containing between 0.5 wt. % and 75 wt. % of phyllosilicates, is characterized in thatthe concrete mix design includes an admixture system 1 which is based on 100% polycarboxylate ether based copolymer (PCE),the admixture system 1 comprising at least one component B1 being a PCE copolymer. |
| 主权项 |
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 or combinations thereof containing between 0.5 wt. % and 75 wt. % of phyllosilicates 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: (i) having its negative charge temporarily blocked, (ii) having an esterification degree of between 5%-50%, (iii) with polyoxyalkylene side chains with 750 to 8000 Da, (iv) with a blocking of the carboxylic acids of 0.1 to 90 mole % units, (v) the backbone of the PCE B1 consisting of carboxylic acids, salt thereof and dicarboxylic acid, anhydride and/or salts thereof, (vi) the total molecular weight of PCE B1 being in a range between 10,000 and 1,000,000; and the admixture system 1 further comprising at least a second PCE. |
