摘要
One of the biggest problems responsible of the nonrenewable resources depletion and environmental issues is the construction industries,which generates large amounts of mineral waste and harmful emitted gases.Therefore,these problems generated the necessity to search for alternative natural building materials based on renewable resources.To study the mechanical characteristics and microstructural behavior of the concrete reinforced by raw wheat straw basalt fiber composite(RWSBFc),and treated rice straw basalt fiber composite(TRSBFc),a number of experimental tests were carried out with different composites ratios.Concrete compressive strength,splitting tensile strength,and flexural strength tests were considered as main parameters.The results showed that the RWSBFC has a positive effect on concrete flexural strength by increasing of 12.58%,compared with control samples.Also,it showed good enhancement in concrete flexibility and ductility.In contrast,both RWSBFc and TRSBFc showed uneven deterioration in concrete compressive strength and splitting tensile strength.To avoid the deterioration in compressive strengths of the various composites types,some improvement methods such as processors for the used straw,and adding some additives were recommended.
建筑业是造成不可再生资源枯竭和环境问题的主要行业之一,该行业会产生大量的废弃物和有害气体。为解决上述问题,有必要研究使用可再生资源用以替代天然建筑材料。本文通过一系列试验研究了未经处理的小麦秸秆-玄武岩纤维混杂复合材料(RWSBFc)与经处理后的稻草-玄武岩纤维混杂复合材料(TRSBFc)在不同掺量比例对混凝土力学特性和微观结构的影响,包括混凝土的抗压强度、劈裂抗拉强度和抗弯强度等主要指标。结果表明,相较于对照组,RWSBFc使混凝土的抗弯强度提高了12.58%。同时,RWSBFc可以显著提高混凝土的变形性能。然而,RWSBFc和TRSBFc也会不同程度地降低混凝土的抗压强度和劈裂抗拉强度。为减小各类复合材料混凝土抗压强度的弱化,建议对秸秆进行处理并使用添加剂等方法。
基金
supported in part by the Priority Academic Program Development of Jiangsu Higher Education Institutions under Grant 1105007002.
