聚羧酸系减水剂与其他减水剂复配性能的研究

Study of Combined Use of Polycarboxylate Based Plasticizer with Other Type of Plasticizers

讨论了聚羧酸系减水剂(PC)的性能特点和应用趋势.试验研究了PC与其他品种减水剂(包括木质素磺酸盐减水剂(LS)、萘系高效减水剂(NSF)、密胺系高效减水剂(MSF)、羰基焦醛高效减水剂(SAF)和氨基磺酸盐系高效减水剂(ASF))之间的复配性能.结果表明:仅从溶液的互溶性来看,实际工程中PC不能与MSF或SAF复配,但可与LS,NSF,ASF复配;PC与LS或SAF复合掺加能获得良好的塑化效果和坍落度保持性;PC与NSF,PC与MSF以及PC与ASF复合掺加都会削弱塑化效果,且PC与NSF复合掺加时对塑化效果和坍落度保持性的负面作用最大.

The performance and application trends of polycarboxylate based plasticizer（PC） is discussed. The combined use of PC with the other type of plasticizers, i.e. Lignosulphate based plasticizer（LS）, naphthalene sulphate based superplasticizer（NSF）, melamine sulphate based superplastieizer（MSF）, aminophenol sulphate based superplasticizer（ASF） and sulfonated acetoneformaldehyde based superplasticizer（SAF）, was experimentally investigated. The results indicate that, based on the solubility of PC and other type of plasticizers, PC can be compounded with LS, NSF or ASF, but it can not be used in combination with MSF or SAF; regarding the efficiency of combined use of different type of plasticizers, PC can be added together with LS or SAF; It does harms to the plasticizing ability and slump retention ability of concrete if PC is added together with NSF, MSF or ASF.