牛稳定压缩土块:一种机械方法来了解其耐水性行为
Yask Kulshreshtha1, Philip J Vardon1, Gabrie M H Meesters2
1Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, The Netherlands.
概括
牛中的小型微生物聚合物增强了土块的抗水性. 使用潮湿的便,更高的压缩和高酸盐丰富的土壤显著提高了可持续建筑的性能.
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.
- 环境科学 环境科学
背景情况:
- 传统上,牛用于稳定土建筑物,主要是为了提高耐水性.
- 目前关于牛在土块中的稳定性的研究主要集中在机械强度上,对其抗水机制的理解有限.
- 之前关于通过高pH诱导的不溶性化合物的耐水性假设对于天然牛-土壤混合物来说并不典型.
研究的目的:
- 为了研究牛稳定压缩土块 (CD-CEB) 的耐水性行为.
- 了解牛和土壤特性对抗水性的影响.
- 为了确定牛中负责增强耐水性的特定成分.
主要方法:
- 在CD-CEB上进行了广泛的实验计划.
- 分析了牛糞特性 (潮湿与干燥) 和土壤特性 (粘土矿物学) 的影响.
- 研究了压缩液体含量对抗水性的影响.
主要成果:
- 在牛中确定了小型微生物聚合物 (SSMA) 作为抵抗水的关键组成部分.
- SSMA是负电荷的,具有低特异表面积的疏水性聚合物.
- 使用潮湿的奶牛便,与干燥的便相比,提高了80倍以上的抗水性.
- 将压缩液的含量增加了3%,提高了40倍以上的耐水性.
- 富含低膨胀粘土矿物质的土壤,如高利尼特,提高了30倍以上的耐水性.
结论:
- 牛中的小型微生物聚合物对于CD-CEB的耐水性至关重要.
- 优化策略包括使用湿牛,更高的紧缩液体含量和富含考林酸盐的土壤.
- 这些发现支持CD-CEB在低碳建筑中的成功扩展,证明了从实验室到现场的实际应用.
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