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Polycarboxylate-Lignosulfonate Copolymerized High Performance Water Reducing Agent: Preparation and Application

A new polycarboxylate-lignosulfonate copolymerized high performance water reducing agent (PCL) was synthesized by polymerizing self-made methoxy polyethylene glycol methacrylate (MPEGMA), methacrylic acid (MAA), lignosulfonate (LS) and sodium methyl acryl sulfonate (SMAS) in aqueous solution. Influence of LS dosage used in synthesis on the performance of the product was investigated. The performance of the new polymer and compounds prepared by polycarboxylate based superplasticizer (PC) and LS were compared, which revealed that the former has better properties of plasticizing and strength improving. Engineering applications indicated that concrete incorporating the new superplasticizer has advantages on its cohesiveness and pumpability. Moreover, it’s not easy to bleed, segregate and stick to the ground.