Investigation on Compatibility between Underwater Anti-washout Admixture and Superplasticizer

摘要

The compatibility between underwater-washout admixture (AWA) and two different types of superplasticizers: polycarboxylate-type and naphthalene-based was investigated. The results show that, there are different compatibilities between AWA and different superplasticizer, but the differences are not apparent. AWA and polycarboxylate superplasticizer compatibility is better than with the naphthalene superplasticizer. The difference of compatibility between AWA and different brand polycarboxylate-type superplasticizer is very slight. The underwater concrete with good anti-washout performance, good fluidity, self-compacting ability and corrosion resistance can be prepared easily through the reasonable compound. However it is difficult to resolve the retarding problem and the contradiction between good fluidity and strength of the non-dispersible underwater concrete.