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现代工程研究进展 2023; 1: (1) ; 1-7; DOI: 10.12208/j.amer.20230006

Open Access, Article

Research progress on physical triggered microcapsule based self-healing cementitious materials

物理触发微胶囊自修复水泥基材料研究进展

作者: 宋侨1,2, 王险峰1,2 *, 陈琪1,2, 杨振鸿1,2, 姜婷3, 李大望1,2, 邢锋1,2

2 广东省滨海土木工程耐久性重点实验室 广东深圳
3 中交四航局港湾工程设计院有限公司 广东广州

*通讯作者: 王险峰 单位:深圳大学土木与交通工程学院 广东深圳;广东省滨海土木工程耐久性重点实验室 广东深圳.

基金项目:

发布时间: 2023-05-25 浏览量:1201

摘要 / Abstract

摘要

自2008年以来,广东省滨海土木工程耐久性重点实验室研究了多种可实现自修复功能的有机和无机的微胶囊。为了能够有效的评价微胶囊在水泥基材料中的修复效率,本文对含物理触发型微胶囊的水泥基材料的强度、抗渗性、碳化深度以及微观孔结构进行了详细描述,发现微胶囊的粒径、掺量、修复龄期以及损伤程度对修复效果有一定影响,微胶囊的掺量是影响修复率的主要因素。另外对微胶囊的基本力学性能也进行了详细描述包括微胶囊的破裂判断标准和微胶囊的弹塑性性能。研究发现通过纳米压痕实验以及数值模拟可以得到微胶囊的弹塑性包括杨氏模量、硬度等物理参数。通过判断微胶囊在水泥基材料中的破裂和脱粘的临界值可以得到微胶囊在水泥基体中是否会发生破裂,实现修复功能。

关键词

物理触发型微胶囊;力学性能;渗透性;微观孔结构;数值模拟;弹塑性分析

Abstract

Since 2008, the Guangdong Provincial Key Laboratory of Durability in Coastal Civil Engineering has studied a variety of organic and inorganic microcapsules that can achieve self-healing functions. In order to effectively evaluate the repair efficiency of microcapsules in cement-based materials, this paper described the strength, impermeability, carbonization depth and micro-pore structure of cement-based materials containing physically triggered microcapsules in detail. It was found that the particle size, dosage, repair age and damage degree of microcapsules had certain effects on the repair effect. The dosage of microcapsules is the main factor affecting the repair rate. In addition, the basic mechanical properties of microcapsules are described in detail, including the rupture criterion and the elastic-plastic properties of microcapsules. It is found that physical parameters such as Young's modulus and hardness of microcapsules can be obtained through nanoindentation experiment and numerical simulation. By judging the critical value of microcapsule rupture and debonding in cement-based materials, whether microcapsule will break in cement matrix can be obtained, and the repair function can be realized.

Key words

Physically triggered microcapsule; Mechanical test; Permeability test; Micro-pore structure; Numerical simulation; Elastoplastic analysis

引用本文 / How to Cite This Article

宋侨,王险峰,陈琪,杨振鸿,姜婷,李大望,邢锋, 物理触发微胶囊自修复水泥基材料研究进展[J]. 现代工程研究进展, 2023; 1: (1) : 1-7.

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