Abstract
Today, it’s getting harder to find natural resources for concrete production. Utilization of the waste materials not just helps in getting them used in concrete, cement, and other construction materials, but also has various secondary advantages, for example, saving in energy, decrease in landfill cost, and protecting climate from pollution. Considering this in the development of modern structural design, utilizing waste materials instead of natural aggregate is a good option to make concrete that is sustainable and eco-friendly. The present research aims to find the impact of adding glass fiber into sustainable concrete made with silica fume, as a partial replacement of cement, and coconut shell added with different ratios as a replacement of coarse aggregate, on concrete mechanical and durability aspects. Various blends were made, with coconut shell as a substitution of coarse aggregates with different ratios. Portland cement was substituted with silica fume at 5%, 10%, 15%, and 20% by cement weight in all concrete blends. The volume ratios of glass fibers utilized in this study were 0.5%, 1.0%, 1.5% and 2.0%. Adding glass fibers increases concrete density to some extent and then marginally reduces the density of coconut shell concrete. When the percentage of glass fibers increases, the compressive, flexural and split tensile strength of coconut shell concrete also increases. From the lab results and SEM images of the present research display that glass fibers might be utilized in coconut shell concrete to enhance its mechanical and durability attributes, to accomplish sustainable concrete with acceptable strength with ease.
Highlights
Today, it’s getting harder to find natural resources for concrete production
Coconut shell concrete compressive strength increases about 20% strength at 45% coconut shell (CS) aggregate, 1.5% addition of glass fiber, and 15% silica fume at 28 days
At 45% substitution of coconut shell aggregate with crushed aggregate and 1.5% addition of glass fiber and 15% silica fume, the concrete split tensile strength increases 22% at 28 days
Summary
Utilization of the waste materials not just helps in getting them used in concrete, cement, and other construction materials, and has various secondary advantages, for example, saving in energy, decrease in landfill cost, and protecting climate from pollution. The present research aims to find the impact of adding glass fiber into sustainable concrete made with silica fume, as a partial replacement of cement, and coconut shell added with different ratios as a replacement of coarse aggregate, on concrete mechanical and durability aspects. From the lab results and SEM images of the present research display that glass fibers might be utilized in coconut shell concrete to enhance its mechanical and durability attributes, to accomplish sustainable concrete with acceptable strength with ease. The fracture toughness and mechanical attributes of coconut Shell concrete are practically identical to lightweight concrete[8]
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