废纸纤维增强混凝土的机械,耐用性和微观结构的评估,含有metakaolin
Mohammad Valizadeh Kiamahalleh1, Aliakbar Gholampour1, Mohsen Rezaei Shahmirzadi2
1College of Science and Engineering, Flinders University, Tonsley, Adelaide, SA 5042, Australia.
Materials (Basel, Switzerland)
|June 19, 2024
概括
回收的石膏板纸纤维可以加强混凝土,改善机械性能和耐久性. 优化使用1%的废纸纤维与金属的最佳使用,使得混凝土与传统混合物相比.
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.
- 可持续建筑 可持续建筑
背景情况:
- 越来越多的建筑材料需求导致水泥生产增加,导致二氧化碳排放.
- 在混凝土中探索回收材料对于可持续建筑实践至关重要.
- 石膏板废弃物是潜在的建筑应用中未充分利用的资源.
研究的目的:
- 评估废纸纤维从废弃的石膏板作为混凝土钢筋的有效性.
- 为了研究金属作为部分水泥替代品,以减轻水的吸收的影响.
- 为了确定废纸纤维的最佳度,以提高混凝土的性能.
主要方法:
- 废纸纤维在不同的百分比 (0.5%至2.5%) 加入,按粘合剂重量计算.
- 使用甲醇来抵消纸纤维吸收的水分.
- 机械测试 (压力和裂纹抗拉强度) 和耐久性评估 (吸水,干燥收缩).
- 微结构分析以了解性能增强.
主要成果:
- 1%的废纸纤维添加优化了机械性能,增加了29%的压力强度和38%的拉伸强度.
- 最佳的纤维含量减少了12%的吸水率和23%的干燥收缩率.
- 较高的纤维度导致由于聚合和分布不良而导致性能下降.
结论:
- 混凝土含有20%的甲烯和1%的废纸纤维,其机械性能和耐久性与传统混凝土相美.
- 回收的石膏板纤维为减少对水泥的依赖和对环境的影响提供了可行的解决方案.
- 这种方法促进了资源的保护,并减少了混凝土生产的生态足迹.
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