The Relationship Between a Modified Polycarboxylic Superplasticizer and Performance of C30 Concrete

The effects of self-compaction concrete(C30) with a new polycarboxylate superplasticizer at recommended dosage on the performance of maintaining slump within an hour,the strengths at different ages and carbonation resistance,were investigated.In addition,comparison of the same performance with the self-compaction concrete made up of FDN was carried out.The experiment result shows that the concrete incorporating this admixture has good performance in maintaining slump,which can maintain its slump above 85 percent within an hour;the admixture is excellent compatible with artificial sand whose substitution rate is less than 50 percent;the carbonation resistance of the concrete with this new admixture is equal to that of the concrete made up of FDN.