用油棕榈壳部分替代骨料对纤维混凝土抗压和抗折强度的影响

Ahmad Zaki, Seplika Yadi, Eki Khoirullianum, Rikki Suganda, Candra Agung Wibisono
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引用次数: 0

摘要

为了实现混凝土材料的特定性能,如密度、强度、环境可持续性和成本效益等,对混凝土材料进行了大量创新。本研究的重点是用油棕壳(OPS)替代部分骨料,以利用以前未充分利用的废物。与标准混凝土相比,含有 OPS 的混凝土通常会降低抗压强度。为了提高注入 OPS 的混凝土的抗压和抗折强度,我们探索了引入纤维的创新措施。由于印度尼西亚和全球范围内爆发的 Covid-19 病毒,使用废弃口罩中的纤维成为重点。这些口罩中的聚丙烯纤维具有不可生物降解的特性,因此有必要采取进一步措施,最大限度地减少废物。在混凝土混合物中加入了不同比例的 OPS:0%、25%、50%、75% 和 100%,每种混合物都加入了 0.20% 的口罩纤维和 0.25% 的超塑化剂。抗压强度测试使用的是直径为 75 毫米、高为 150 毫米的圆柱形试样,而抗折强度则使用尺寸为 100 x 100 x 500 毫米的梁试样进行评估。未使用 OPS 的混凝土的基准抗压强度为 17.76 兆帕。抗折强度测试结果显示,0% OPS 混合物的抗折强度最高,为 1.67 兆帕,100% OPS 混合物的抗折强度最低,为 0.49 兆帕。通过方差分析(ANOVA)进行的统计分析显示,抗压强度处理组合与替代 OPS 作为粗骨料之间存在明显的相关性。
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Effect of partial replacement of aggregate with oil palm shell on compressive and flexural strength of fiber concrete
Considerable innovation has been applied to concrete material to achieve specific properties such as density, strength, environmental sustainability, cost-effectiveness, among others. This study focused on the replacement of a portion of the aggregate with oil palm shell (OPS) to utilize previously underutilized waste. Concrete containing OPS typically exhibits reduced compressive strength compared to standard concrete. To enhance the compressive and flexural strength of OPS-infused concrete, the introduction of fibers was explored as an innovative measure. A particular focus was placed on using fibers from discarded masks due to the Covid-19 outbreak in Indonesia and globally. The non-biodegradable nature of polypropylene fibers in these masks necessitates further measures to minimize waste. Different proportions of OPS were incorporated into the concrete mix: 0%, 25%, 50%, 75%, and 100%, with each mix incorporating 0.20% mask fiber and 0.25% superplasticizer. Compressive strength testing employed cylindrical specimens with a diameter of 75 mm and a height of 150 mm, while flexural strength was assessed using beam specimens measuring 100 x 100 x 500 mm. The baseline compressive strength for concrete without OPS measured 17.76 MPa. The results of flexural strength testing revealed the highest value of 1.67 MPa for the 0% OPS mix and the lowest, 0.49 MPa, for the 100% OPS mix. Statistical analysis via analysis of variance (ANOVA) highlighted a notably significant correlation between the treatment combinations involving compressive strength and the replacement of OPS as coarse aggregate.
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