| Title |
Evaluation on Compressive Strength and Toughness Index of Lightweight Aggregate Concrete with Expanded Waste-glass Particles and Micro Steel Fibers |
| Authors |
이혜진(Lee, Hye-Jin) ; 김학영(Kim, Hak-Young) ; 양근혁(Yang, Keun-Hyeok) ; 이재윤(Lee, Jae-Yun) |
| DOI |
https://doi.org/10.5659/JAIK.2022.38.5.251 |
| Keywords |
Expanded waste-glass particles; Micro steel fiber; Compressive toughness index; Strength/weight ratio |
| Abstract |
The objective of this study is to examine the applicability of expanded waste-glass particles as an alternative for lightweight fine aggregates
to produce lightweight aggregate concrete (LWAC) with a higher strength/weight ratio. The effectiveness of micro steel fibers was also
investigated in alleviating the increased brittleness of LWAC due to the addition of the waste-glass particles. The main test parameters were
the replacement ratio of the waste-glass particles for lightweight fine aggregates and the type (hooked-end and straight shapes) of micro steel
fibers. Test results showed that LWAC containing the expanded waste-glass particles displays higher compressive strength than the
conventional LWAC at the same unit weight, whereas compressive toughness index (? ) of LWAC tends to decrease with the increase in the
waste-glass particle content. At the same level of fiber reinforcing index, waste-glass LWAC reinforced with micro steel fibers exhibited
higher ? values than LWAC with the conventional macro steel fibers. Overall, the hybrid use of micro steel fibers with hooked-end and
straight shapes could be considered positively in improving the toughness of LWAC containing the expanded waste-glass particles. |