Method of Preparing for Poly Wood-carboxylate Superplasticizer and Its Performance Experimental Study

A new superplasticizer of polycarboxymethyl-lignin sulphonate is prepared by polycarboxylate superplasticizer and lignosulphonate-based water reducing agent, which is mostly extracted from the waste paper pulp. In this article, graft-copolymerization temperature, copolymerization time, lignosulphonate and polycarboxylate intermediates mass ratio on the synthesis of poly wood-carboxylate superplasticizer properties are discussed. Infrared spectrogram shows that1343.95cm-1 position is the ester C=O-C stretching vibration, a new material of poly wood-carboxylate superplasticizer is formed. The tests exhibit the poly wood-carboxylate superplasticizer has good plasticizing and fluidity retaining ability with the dosage of 0.5%(by mass), and the water reduction rate is 31.3%. These results indicate that poly wood-carboxylate superplasticizer has low volume, low costs, high liquidity and high slump retaining characteristics.