预处理的luffa纤维增强水泥砂的机械性能和微观结构
Renqiang Yang1,2, Zhengjun Guan1, Lihua Zhang3
1College of Engineering and Technology, Southwest University, Chongqing, China.
PloS one
|February 7, 2025
概括
在水泥砂中预处理的luffa纤维显著提高了强度,减少了收缩. 在1%的纤维含量和1厘米的长度下,可以达到最佳性能,提高机械性能并减轻用于建筑应用的纤维聚合.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 可持续材料 可持续材料
背景情况:
- 传统的水泥材料在机械性能和耐用性方面存在局限性.
- 天然纤维为复合材料开发提供了一种可再生和潜在的有利替代品.
- 卢夫法纤维的固有特性,如耐磨性和性,使其成为增强材料的候选者.
研究的目的:
- 研究预处理的luffa纤维含量和尺寸对水泥砂性能的影响.
- 使用先进的成像技术分析纤维砂接口和水化产品.
- 为了确定最佳的luffa纤维参数,以提高机械性能和减少收缩.
主要方法:
- 在不同百分比和长度的水泥砂中加入预处理的luffa纤维.
- 使用扫描电子显微镜和能量分散光谱 (SEM-EDS) 进行系统分析,用于界面和水化产品的表征.
- 计算机断层扫描 (CT) 来评估砂矩阵内的纤维分布和空隙形成.
主要成果:
- 1%的长度为1厘米的luffa纤维含量显著增加了28天的压力和屈曲强度,分别为10.81%和9.47%.
- 与普通水泥砂相比,减少了56天的干燥收缩率高达7.17%.
- 在SEM-EDS中,有1厘米纤维的C-S-H和AFt结构得到了增强,这表明了更好的界面粘合.
- CT扫描显示纤维聚合和增加空隙在更高的纤维含量,在样品表面的度.
结论:
- 预处理的luffa纤维有效地提高了水泥砂的强度,性和抗收缩能力.
- 在1%的纤维含量和1厘米的长度下,可以达到最佳性能,平衡机械增强和减轻纤维聚合.
- 这项研究强调了luffa纤维增强水泥砂作为可持续建筑材料的潜力.
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