Effects of Manufacturing Techniques on the Physico-mechanical Properties of Cement-bonded Bagasse Fiber Composite

ABSTRACT

Natural fibers used in cement-based materials are gaining popularity; however, large variations in the properties and characteristics of the composites call for a better understanding of the influence of the production variables. This study examined the effects of methods of manufacture, fiber contents and pre-treatment on the physicomechanical properties of bagasse-reinforced cement composites. Composites were manufactured by conventional tapping, low-pressure pressing, and vibration methods incorporating bagasse fiber at 2%, 3%, and 4% by mass of cement. Fiber was pre-treated with calcium chloride (CaCl₂) solution at 1%, 2%, and 3% (w/v) concentrations. The composites produced were examined for physical and mechanical properties, and the microstructures were examined through scanning electron microscopy (SEM). The optimal values of mean water absorption, thickness swelling, modulus of elasticity, and modulus of rupture were 6.47%, 0.18%, 3.2 GPa, and 6.3 MPa, respectively, and were obtained at 3% calcium chloride pre-treatment, 2% bagasse contents, and produced by vibration method. The results were further corroborated by the SEM analyses. The manufacturing methods, fiber contents and pre-treatments, and the interaction of these variables had significant effects on the sorption and the strength properties of the composites at α_0.05.

摘要

用于水泥基材料的天然纤维越来越受欢迎; 然而，复合材料性能和特性的巨大变化需要更好地理解生产变量的影响. 研究了制备方法、纤维含量和预处理对蔗渣增强水泥基复合材料物理力学性能的影响. 复合材料采用传统的出钢、低压压制和振动方法，加入质量分数为2%、3%和4%的蔗渣纤维. 纤维用氯化钙（CaCl2）溶液在1、2和3%（w/v）浓度下进行预处理. 对制备的复合材料进行了物理和机械性能测试，并通过扫描电子显微镜（SEM）检查了微观结构. 在3%氯化钙预处理、2%蔗渣含量和振动法制备的最佳吸水率、厚度膨胀率、弹性模量和断裂模量分别为6.47%、0.18%、3.2gpa和6.3mpa. 扫描电镜分析进一步证实了这一结果. 制备方法、纤维含量和预处理以及这些因素之间的相互作用对复合材料在α0.05下的吸附和强度性能有显著影响.

KEYWORDS:

• Physico-mechanical
• composites
• calcium chloride
• scanning electron microscopy
• vibrating table

关键词:

• 物理机械
• 复合材料
• 氯化钙
• 扫描电子显微镜
• 振动台