As the polycarboxylate-type high performance superplasticizer(PCEs) has the excellent performance on the water reducing

nowadays it has been one of the hottest researches on the concrete admixtures. In the paper

four different molecular structures of PCEs were detailed specified basing on the development history. Meanwhile

there is a contrast about the synthesis of four PCEs and the pros and cons of their performance. According to the problems focused on its poor abilities

such as slump

shrinkage rage

early strength

air entraining and sensibility

which have been studied both at home and abroad. And varieties of feasible solutions have been provided. At last

other aspects of PCEs

such as environmental protection

material price and market demand

have also been briefly described and prospected in the paper.