基于水泥混凝土应用的物理和形态特征对砂源的比较评估
Habert Ayesiga1, Mahamudu H Mtebwa1, Innocent J Macha2
1Department of Mechanical and Industrial Engineering, College of Engineering and Technology, University of Dar es Salaam, P. O. Box 35091, Dar es Salaam, Tanzania.
Scientific reports
|January 30, 2026
概括
这项研究评估了达累斯萨拉姆的当地沙子质量,用于生产混凝土. 只有Mpigi Magohe和Tegeta的沙子符合ASTM标准,这凸显了混合或洗低质量的聚合物的必要性.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 地质技术工程 地质技术工程
背景情况:
- 砂是关键的建筑材料,影响混凝土的性能和结构完整性.
- 当地采购的精细聚合物的质量直接影响水泥混凝土的强度和耐用性.
- 评估当地沙子来源对于可持续和可靠的建筑实践至关重要.
研究的目的:
- 评估在坦桑尼亚达累斯萨拉姆当地开采的七个沙源是否适合生产水泥混凝土.
- 根据ASTM标准确定这些细聚合物的物理和形态特性.
- 确定高质量的沙源,并推改善低质量的局部聚合物的方法.
主要方法:
- 物理性质测试,包括分析,水吸收,比重和散装密度.
- 对泥和有机物质含量进行化学性质评估.
- 使用扫描电子显微镜 (SEM) 进行形态表征,以评估颗粒质地和多孔性.
主要成果:
- 精度模块在1.75~2.66之间;吸水率在1.80~6.08%之间.
- 具体重量在2.50和2.65之间变化;散装密度从1489到1735公斤/米3.
- 只有Mpigi Magohe和Tegeta的沙子符合ASTM高质量细聚合物的标准,具有特定的理想性质.
结论:
- 由于其物理和形态特性,Mpigi Magohe和Tegeta的沙子适合用于混凝土生产.
- 来自Ngeta,Mkuranga,Mbagala和Jangwani的沙子需要混合或加工 (例如,洗) 以改善颗粒大小分布和减少杂质.
- 提高当地聚合物的质量对于改善该地区建筑项目的耐用性和性能至关重要.
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