摘要
络合型功能外加剂是一种可赋予混凝土裂缝自修复功能的添加剂.文中研究了络合型外加剂对水泥基材料的凝结时间、孔隙率、微结构、力学性能,以及裂缝自修复能力的影响.结果表明,络合型功能外加剂可降低水泥基材料的孔隙率,改善其密实度,明显提高其力学性能,并赋予其优良的裂缝自修复能力.与普通砂浆相比,掺加水泥量0.5%的络合型功能外加剂的砂浆的孔隙率降低了18.1%,28d的抗折、抗压强度分别提高了15.5%和26.8%,0.27mm的裂缝可实现自修复.
The chelating functional admixture is a kind of additive with self-healing ability to concrete cracks.The effects of the chelating functional admixture on the setting time,porosity,microstructure,mechanical property and crack self-healing capability of cement based materials were investigation.The results show that the chelating functional admixture can reduce the porosity of cement base material,improve the compactness and mechanical properties obviously,and make the structure has excellent crack self-healing ability.Compared with the ordinary mortar,the porosity of mortar with 0.5% chelating functional admixture of cement dosage is reduced by 18.1%,the flexural strength and compressive strength at 28 curing days increased by 15.5% and 26.8% respectively,and the cracks of 0.27 mm can be self-healed.
出处
《武汉理工大学学报（交通科学与工程版）》
2018年第1期136-139,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家重点研发计划项目资助(2017YFB0309905)
关键词
水泥基材料
络合型功能外加剂
力学性能
微观结构
裂缝自修复
cement-based material
chelating functional admixture
mechanical property
microstruc-tu re
crack self-healing
作者简介
查亚刚（1991-）：男,硕士生,主要研究领域为道路与桥梁工程
