Study on preparation and performance of polycarboxylate superplasticizer with water-reducing and slump-preserving properties by ether-ester copolymerization
Using hydroxyethyl acrylate(HEA),isopentenyl polyoxyethylene ether(TPEG)and acrylic acid(AA)as the main raw materials,diethylene glycol acrylate(EGD)is introduced to synthesize a water-reducing and slump-preserving polycarboxylate superplasticizer in an oxidation-reduction system at 45℃.The results show that compared to the commercially available ordinary polycarboxylate superplasticizer mother liquor,this product not only has better dispersibility and slump retention ability,but also comes with an inherent air entraining effect,which can effectively improve the workability of concrete and increase its compressive strength and comprehensive performance.
NETL
NSTL
万方数据
