通过对萘系、木质素类、脂肪族类外加剂在较低掺量(≤4.0%)下与聚羧酸外加剂复合,研究了三种外加剂在低掺量下对聚羧酸减水剂在水泥净浆及混凝土中应用性能的影响。研究结果表明,三种缩聚型减水剂在低掺量下都能提高聚羧酸的减水效果,但对混凝土的坍落度保持性能影响较小。 Through the compounding of naphthalene series, lignin series and aliphatic series additives with polycarboxylic acid additive under the low content (≤4.0%), the effects of three kinds of additives on the reduction of polycarboxylic acid under low dosage were studied. Effect of agent on the performance of cement paste and concrete. The results show that the three kinds of polycondensation water reducer can increase the water reducing effect of polycarboxylic acid at low dosage, but have little effect on the slump retention property of concrete.