β-环糊精侧基对聚羧酸系减水剂结构与性能的影响  

Effect of β-cyclodextrin side groups on structure and properties of new polycarboxylate superplasticizer

作　　者：吕生华[1] 邱超超[1] 高瑞军[1] 李第[1] 来水利[2] 

机构地区：[1]陕西科技大学资源与环境学院,陕西西安710021 [2]陕西科技大学化学与化工学院,陕西西安710021

出　　处：《功能材料》2013年第1期56-60,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21076121)

摘　　要：通过对不同龄期的硬化水泥石进行XRD、SEM和孔隙率测定,研究了含β-环糊精(β-CD)侧基的聚羧酸减水剂(MPC)对硬化水泥石水化产物种类、数量及其微观结构的影响。XRD结果表明,MPC能明显地促进后期水化产物氢氧化钙(CH)的生成。SEM和孔隙率结果说明,MPC可使水泥石的结构更加紧密匀质、孔隙更加微小。混凝土强度的测定结果表明,MPC可使混凝土7和28d的强度发展更具有优势。The effect of polycarboxylate superplasticizer contained β-cyclodextrin（β-CD） side groups（MPC） on quantity of hydration products and microstructure of hardened cement were investigated by XRD,SEM and total porosity tests at different curing age.XRD results show that MPC can speed up remarkably the amount of portlandite（CH） at the later stages of cement curing periods.SEM and porosity results show that the microstructure and the total porosity of the hydration products become more homogeneity and little using MPC as superplasticizer.The results of the property of concrete in macroscopy show that MPC brings higher compressive strength values than that of polycarboxylate superplasticizer（PC） at any hydration age.The compressive strength test of 7 and 28d indicated that MPC was benefit for the improvement of the later compressive strength of concrete.

关 键 词：Β-环糊精 聚羧酸系减水剂 微观结构 力学性能 

分 类 号：Q63[生物学—生物物理学] TQ047.9[化学工程]