甘蔗-甘蔗渣-纤维增强混凝土:抗压和劈裂抗拉强度的评价

Syed Ahmad Farhan, Mohamed Mubarak Abdul Wahab, Nur Hazimah Shokib, Allif Imran Jaleel Faiyaz Ahmed, Nadzhratul Husna, Siti Nooriza Abd Razak, Nasir Shafiq
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摘要

鉴于许多发达国家的原材料成本不断增加和自然资源日益枯竭,必须考虑在建筑材料中采用废物。纤维增强混凝土(FRC)是一种使用钢或合成纤维的混凝土。甘蔗甘蔗渣纤维(SCBF)是一种来自农业工业的废料,可以作为钢或合成纤维的替代品,在纤维复合材料中加以利用。鉴于这种可能性,本研究对甘蔗-甘蔗渣-纤维增强混凝土(SCB-FRC)在不同SCBF体积下的抗压和劈裂抗拉强度进行了评估。制备了四种类型的混凝土样品,即不含任何SCBF的对照样品和含有0.5、1.0和1.5%的SCBF(按水泥体积计纤维长度为5cm)的SCBF的SCB-FRC样品。试件在水中固化7天和28天进行抗压强度试验,28天进行劈裂拉伸试验。结果表明,当纤维体积为1.0%时,7 d和28 d的抗压强度最高可达24.75和33.02 MPa,劈裂抗拉强度最高可达2.61 MPa。当纤维体积从1.0增加到1.5%时,混合过程中纤维束的形成可能导致强度下降。
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Sugarcane-Bagasse-Fibre-Reinforced Concrete: Evaluation of Compressive and Splitting Tensile Strengths
In view of the increasing cost of raw materials and depleting natural resources in many developed countries, adoption of waste in construction materials has to be considered. Fibre-reinforced concrete (FRC) is a type of concrete that employs steel or synthetic fibres. Sugarcane bagasse fibre (SCBF), which is a waste material from the agricultural industry, can potentially be utilized in FRC as an alternative to steel or synthetic fibres. In light of the potential, in the present study, compressive and splitting tensile strengths of sugarcane-bagasse-fibre-reinforced concrete (SCB-FRC) at varying volumes of SCBF were evaluated. Four types of concrete samples were prepared, which are the control sample that does not contain any SCBF and SCB-FRC samples that contain 0.5, 1.0, and 1.5% of SCBF of 5-cm fibre lengths by volume of cement. Samples were cured in water for 7 and 28 days for compressive strength testing and 28 days for splitting tensile testing. Findings indicate that the optimum fibre volume is 1.0%, where the highest compressive strengths of 24.75 and 33.02 MPa were achieved at 7 and 28 days of curing, respectively, and the highest splitting tensile strength of 2.61 MPa was achieved. Formation of fibre bundles during mixing may have resulted in the decrease in strength as the fibre volume was further increased from 1.0 to 1.5%.
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