Research progress on anti-mud properties of polycarboxylate superplasticizer
Polycarboxylate superplasticizer(PCE)is widely used for its excellent properties such as high water reduction rate,good dispersibility,long slump retention time and adjustable molecular structure.However,due to the increasing scarcity of high-quality natural sand,the mud content in concrete aggregate is generally high,which seriously affects the effect of PCE in engi-neering.Therefore,how to improve the compatibility of PCE and clay has become a key problem to be solved.In this review,the interaction mechanism between different clay minerals and PCE is discussed.The research results of improving the mud resistance of PCE in recent years are summarized in detail from the adjustment of side chain length,the change of side chain shape,the introduction of functional groups and the use of sacrificial agents,which provides reference for the further design and development of PCE.