| Title |
Evaluation of Material Properties and Panel Applicability of Lightweight High-Strength Cementitious Composites Incorporating Waste Glass Beads |
| Authors |
최병철(Choi, Byung-Cheol) ; 김규용(Kim, Gyu-Yong) ; 지성준(Ji, Sung-Jun) ; 윤혜영(Youn, Hye-Young) ; 편수정(Pyeon, Su-Jeong) ; 남정수(Nam, Jeong-Soo) |
| DOI |
https://doi.org/10.5659/JAIK.2026.42.1.371 |
| Keywords |
Waste Glass Beads; Lightweight Aggregate; High-Strength Cementitious Composites; Lightweight Concrete; Panel |
| Abstract |
In this study, the compressive strength and absolute-dry bulk density among the material properties of high-strength cementitious composites
(HSC) incorporating waste glass beads (WGB) as lightweight aggregate were analyzed to evaluate compliance with the structural lightweight
concrete criteria, and panel fabrication was conducted to examine the applicability of WGB as a construction material. The experimental
results indicated that as the WGB replacement ratio increased, unit weight, compressive strength, flexural strength, and absolute-dry bulk
density decreased, while absorption ratio increased, thereby contributing to the lightweight properties of HSC. All mixtures satisfied the
structural lightweight concrete criterion (≥15 MPa) specified by CEB/RILEM. Notably, the 20% and 30% WGB replacement mixtures met
the absolute-dry bulk density range of 1.6?2.0 t/m3, demonstrating that the porous and low-density characteristics of WGB can effectively
improve lightweight efficiency while maintaining structural performance. In terms of specific strength, the 20% and 30% mixtures were also
within the range reported for lightweight concrete in previous studies (10-40 MPa/(t/m3)). Correlation analysis confirmed strong relationships
between absolute-dry bulk density and compressive strength (R2=0.9497), as well as between absolute-dry bulk density and specific strength
(R2=0.9558). For the panels, the WGB-replaced specimens showed a reduction in air-dry bulk density, thereby demonstrating their lightweight
effect. Overall, when 20% and 30% of WGB were incorporated into HSC as replacements, a balance between lightweight properties and
structural performance was achieved, confirming its applicability as structural lightweight concrete and suggesting the potential utilization of
WGB as a material for achieving lightweight HSC. |