Axial capacity of rubberized RC short columns comprising glass powder as a partial replacement of cement

作者：Mahmoud Elsayed, Ahmed D. Almutairi, Mostafa A. Hussein, Hany A. Dahish · 发表于：Structures · 年份：2024 · DOI：10.1016/j.istruc.2024.106612 · 被引用次数：23 · 研究领域：Innovative concrete reinforcement materials、Structural Behavior of Reinforced Concrete、Innovations in Concrete and Construction Materials

The main goal of this research is to investigate the impact of using waste glass powder (GP) and crumb rubber (CR) as partial substitutes for cement and fine aggregates (FA) in concrete, respectively, on the behavior of reinforced concrete columns. Consequently, nine different concrete mixtures were produced, comprising three replacement levels of CR (0%, 5%, and 10%) by FA volume and three replacement levels of GP (0%, 10%, and 20%) by cement weight. To determine the axial capacity , toughness, and stiffness of the columns, nine columns (one column for each mixture) were prepared and tested under concentric loading. The results showed that the axial capacity and toughness of the tested columns significantly improved with the addition of GP up to 10%, while the opposite observation was found for CR. For replacement levels of cement with GP more than 10%, the capacity and toughness of rubberized concrete columns decreased. The stiffness of the rubberised concrete columns increased as the GP content has increased. Taking engineering and environmental concerns into consideration, 5% CR and 20% GP are the most appropriate substitution proportions in the concrete mixture. The inclusion of 10% or 20% of GP without CR induced an improvement in the compressive strength of 14.5% and 1.9% and an improvement in the ultimate axial capacity of 14.1% and 5.2%, respectively. The ability of international design codes (ACI and CSA) formulations for conventional concrete to estimate the axial ...