Department of Civil and Environmental Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750, Tronoh, Perak, Malaysia.
Department of Civil Engineering, Quaid-e-Awam University of Engineering, Science & Technology Campus Larkana, Larkana, Pakistan.
Environ Sci Pollut Res Int. 2022 Jan;29(4):5207-5223. doi: 10.1007/s11356-021-16034-3. Epub 2021 Aug 21.
This experimental research was conducted to study the combined effect of agricultural by-product wastes on the properties of concrete. The coconut shell ash (CSA) was utilized to substitute cement content ranging from 0 to 20% by weight of total binder and sugarcane bagasse ash (SCBA) to substitute fine aggregates (FA) ranging from 0 to 40% by weight of total FA. In this regard, a total of 300 concrete specimens (cylinders and cubes) were prepared using 1:1.5:3 mix proportions with a 0.52 water-binder ratio. The study investigated the workability, density, permeability, and mechanical properties in terms of compressive and splitting tensile strengths. Additionally, the total embodied carbon for all mix proportions was calculated. It was observed that with an increase in CSA and SCBA contents, the workability, density, and permeability reduced significantly. Due to CSA and SCBA being pozzolanic materials, a gain in compressive and splitting tensile strengths was observed for certain concrete mixes, after which the strength decreased. The increase in embodied carbon of SCBA increased the total embodied carbon of concrete; however, it can be said that C15S40 which consists of 15% CSA and 40% SCBA is the optimum mix that achieved 28.75 MPa and 3.05 MPa compressive and tensile strength, respectively, a reduction of 4% total embodied carbon.
本实验研究旨在研究农业副产品废物对混凝土性能的综合影响。利用椰子壳灰（CSA）替代总胶凝材料重量的 0 至 20%，利用甘蔗渣灰（SCBA）替代总细骨料重量的 0 至 40%。因此，共制备了 300 个混凝土试件（圆柱和立方体），采用水胶比为 0.52 的 1:1.5:3 混合比例。研究了工作性、密度、渗透性和机械性能，包括抗压强度和劈裂抗拉强度。此外，还计算了所有配合比的总隐含碳。结果表明，随着 CSA 和 SCBA 含量的增加，工作性、密度和渗透性显著降低。由于 CSA 和 SCBA 是火山灰材料，某些混凝土配合比的抗压强度和劈裂抗拉强度有所提高，之后强度下降。SCBA 隐含碳的增加增加了混凝土的总隐含碳；然而，可以说包含 15% CSA 和 40% SCBA 的 C15S40 是最佳配合比，其抗压强度和劈裂抗拉强度分别达到 28.75 MPa 和 3.05 MPa，总隐含碳减少了 4%。
