阳离子性聚丙烯酰胺对水泥净浆性能的影响

Effect of Cationic Polyacrylamide on the Performances of Cement Paste

研究了阳离子性聚丙烯酰胺(CPAM)对水泥净浆抗折强度、抗冲击强度、容重、空隙率和吸水率的影响。结果发现 ,向水泥基体中加入低掺量的CPAM ,水泥净浆的抗折强度随着CPAM掺量的增多而明显增大 ,但当掺量达到一定值后则开始减小 ;随CPAM掺量的增加 ,水泥净浆的空隙率和吸水率减小 ,容重增大 。

The effect of cationic polyacrylamide(CPAM) on the flexural strength, inpact resistance, unit weight, porosity and water absorption of modified cement pastes has been studied. It is found that adding the trace of cationic polyacrylamide into the cement matrix can improve lots of properties of cement pastes, i.e. increasing flexural strength and unit weight, decreasing porosity and water absorption, but the impact resistance is hardly affected. As the cationic polyacrylamide content increased, the flexural strength of cement paste increased concurrently, but the flexural strength will decrease as the content is up to a certain value.