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Title |
Investigation of Physical Properties and Self Healing of Hardener-Free Epoxy ?Modified Mortars with GGBFS
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Authors |
조영국(Young-Kug Jo) ; 김완기(Wan-Ki Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2020.24.1.80 |
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Keywords |
고로슬래그미분말; 에폭시수지 혼입 모르타르; 강도; 접착성; 투수성; 자기치유효과 Ground granulated blast furnace slag; Epoxy-modified mortar; Strengths; Adhesion; Degree of Hardening; Self-healing effects |
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Abstract |
The purpose of this study is to investigate the physical properties and self-healing effects of hardener-free epoxy-modified mortars(EMMs) using ground granulated blast furnace slag(GGBFS). The EMMs with GGBFS were prepared with various polymer-binder ratios and GGBFS contents, and tested for strengths, adhesion in tension, water permeation and self-healing effects. The conclusions obtained from the test results are summarized as follows. The compressive strength of the EMMs with GGBFS is reduced with increasing polymer-binder ratios because of reduction of the degree of hardening in the EMMs, and is somewhat inferior to that of unmodified mortars. In the flexural and tensile strengths, the flexural strength of the EMMs is almost constant with increasing polymer-binder ratios. However, the tensile strength of the EMMs is gradually increased with increasing polymer-binder ratios. Regardless of the GGBFS contents, the adhesion in tension of the EMMs increases sharply with increasing polymer-binder ratios. The water permeation of the EMMs is remarkably reduced with increasing polymer-binder ratios and GGBFS contents. The self-healing effect of the hardener-free EMMs with GGBFS is improved with increasing water immersion period at a GGBFS content of 20%.
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