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Title |
Compressive Strength Properties of Lightweight Aggregate Mortar with Waste Glass Beads
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Authors |
편수정(Su-Jeong Pyeon) ; 김규용(Gyu-Yong Kim) ; 최병철(Byung-Cheol Choi) ; 이상수(Sang-Soo Lee) ; 남정수(Jeong-Soo Nam) |
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DOI |
https://doi.org/10.4334/JKCI.2025.37.2.125 |
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Keywords |
폐유리 발포비드; 경량골재 모르타르; 압축강도; 수화 반응; 내부양생 효과 waste glass beads; lightweight aggregate mortar; compressive strength; hydration; internal curing effects |
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Abstract |
This study evaluated the compressive strength characteristics of lightweight aggregate mortar by replacing fine aggregates with waste glass beads (WGBs). The evaluation examined the compressive strength, plastic hardness, pH, and SEMresults of mortars with varying WGB replacement ratios. While the compressive strength of WGB-replaced mortar was lower than that of plain mortar, the addition of WGBs significantly increased the long-term compressive strength ratio. As the WGBreplacement ratio increased, the pH reduction over time was less pronounced compared to plain mortar. SEM analysis confirmed thatthe microstructure was enhanced due to ongoing hydration reactions at later ages. However, water absorption by the WGBs increasedthe porosity of the cement paste and reduced the density of the interfacial transition zone (ITZ), leading to a decline in plastichardness regardless of the WGB replacement ratio. Although WGBs did not enhance compressive strength at 28 days, it is expectedthat continuous hydration, facilitated by internal curing effects, will positively influence long-term compressive strengthdevelopment beyond 90 days.
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