电阻率法研究聚羧酸减水剂对水泥水化的影响  

Effect of Polycarboxylate Superplasticizer on Cement Hydration by Electrical Resistivity

作　　者：张畅[1] 魏小胜[1] 田凯[2] 

机构地区：[1]华中科技大学土木工程与力学学院,武汉430074 [2]中国建筑科学研究院,北京100013

出　　处：《长江科学院院报》2009年第6期44-47,共4页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金(50778078)

摘　　要：测试和分析了不同聚羧酸减水剂掺量下电阻率的发展曲线及其特征,并且建立了最小电阻率出现时间与初凝、终凝时间的关系。研究发现早龄期电阻率与相应龄期抗压强度之间存在线性相关,通过测定电阻率可以有效地预测硬化体的强度。研究结果表明电阻率曲线能很好地反映水泥净浆凝结硬化的变化过程。The electrical resistivities of the cement pastes with the different polycarboxylate superplasticizer dosages were examined and analyzed. The relationship between the occurring time of minimum resistivity and the initial setting and final setting times was established. The study results show that the relation between the resistivity of cement mortar at early age and the compressive strength of its corresponding age is a linear correlation, that measuring the rsistivity may predict the strength of hardened cement, and that the resistivity curve can reflect the process of hardenability of paste.

关 键 词：电阻率 聚羧酸减水剂 凝结时间 抗压强度 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]