Sodium silicate/polyurethane microcapsules synthesized for enhancing self-healing ability of cementitious materials: Optimization of stirring speeds and evaluation of self-healing efficiency

被引：19

作者：

Beglarigale, Ahsanollah ^{[1
]}

Eyice, Doga ^{[2
]}

Seki, Yoldas ^{[3
]}

Yalcinkaya, Caglar ^{[2
,4
]}

Copuroglu, Oguzhan ^{[4
]}

Yazici, Halit ^{[2
]}

机构：

[1] Istanbul Okan Univ, Dept Civil Engn, Istanbul, Turkey

[2] Dokuz Eylul Univ, Dept Civil Engn, Izmir, Turkey

[3] Dokuz Eylul Univ, Dept Chem, Izmir, Turkey

[4] Delft Univ Technol, Fac Civil Engn & Geosci, Sect Mat & Environm, NL-2628 CN Delft, Netherlands

来源：

JOURNAL OF BUILDING ENGINEERING | 2021年 / 39卷

关键词：

Cementitious materials; Microencapsulation; Self-healing; Sodium silicate; MICROENCAPSULATION; ENCAPSULATION; POLYURETHANE; FEASIBILITY; PERFORMANCE; REPAIR; DAMAGE; AGENT;

D O I：

10.1016/j.jobe.2021.102279

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In this study, stirring speeds during the synthesizing process of the sodium silicate/polyurethane microcapsules were optimized. The yield values of micmcapsules at different stirring rates were evaluated. Based on the yield values and shape of microcapsules, optimized microcapsules were obtained. The measurements of the shell thickness of microcapsules were performed on the fractured microcapsules by using scanning electron microscopy. The optimized micmcapsules were further characterized by means of optical microscopy and nanoindentation. Load vs. displacement and modulus of elasticity vs. displacement characteristics of the microcapsules were obtained. The average modulus of elasticity was found to be 633 MPa. The self-healing efficiency of the optimized micmcapsules was evaluated by means of compressive strength tests. The incorporation of micmcapsules reduced the compressive strength of fiber-reinforced mortar by 12-22%. However, it was observed that the microcapsules enhanced the self-healing capacity (recovery in compressive strength) of the mortar.

引用

页数：10

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