东南大学学报（英文版）2017，Vol.33Issue(3)：309-315,7.DOI:10.3969/j.issn.1003-7985.2017.03.009
高吸水性树脂改进应变硬化水泥基复合材料的力学性能
Mechanical property of strain-hardening cementitious composites modified with superabsorbent polymers
摘要
Abstract
In order to improve the tensile property, flexural property and drying shrinkage of strain-hardening cementitious composites (SHCC), mixtures quantitatively modified with superabsorbent polymer ( SAP) were investigated. The uniaxial tensile test, the four-point bending test, the compressive test, the drying shrinkage test and the environmental scanning electron microscope (ESEM) were employed to investigate the tensile strain capacity, flexural deformation capacity, compressive strength, drying shrinkage, crack width and self-healing of SHCC. The experimental results show that SHCC modified with SAP particles exhibits excellent ductility and deformability, and the tensile strain is up to about 4.5% and the average crack width is controlled around 40 μm. Meanwhile, the drying shrinkage of SHCC modified with SAP particles can reduce by about 60%. Furthermore, the self-healing behavior is observed in the cracks of specimen after three cycles of high-low relative humidity curing, and the self-healing products can completely fill the cracks of SHCC specimens modified with SAP particles. It is, therefore, feasible to produce SHCC material modified with SAP particles, while simultaneously retaining higher material ductility.关键词
应变硬化水泥基复合材料/高吸水性树脂/力学性能/自愈合Key words
strain-hardening cementitious composites (SHCC)/superabsorbent polymer (SAP)/mechanical property/self-healing分类
交通工程引用本文复制引用
邓涵文..高吸水性树脂改进应变硬化水泥基复合材料的力学性能[J].东南大学学报（英文版）,2017,33(3):309-315,7.基金项目
The National Natural Science Foundation of China (No. 51278097), Start-up Grant provided by Nanyang Technological University (No.M4081208). （No. 51278097）
