通过部分用喀麦隆玉米炉灰代替水泥,生态混凝土
Martial Ngnihamye Nde1,2, Seidou Youssoufa1,3, Fabien Kenmogne2,4
1Department of Civil Engineering, National Advanced School of Public Works, P.O. Box 510, Yaoundé, Cameroon.
Heliyon
|January 22, 2025
概括
喀麦隆玉米炉灰 (CCSA) 可以部分取代混凝土中的水泥,改善长期的机械性能并减少孔隙性. 10%的CCSA替代证明了最佳结果,显示了可持续建筑材料的潜力.
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:
- 建筑行业在采购可持续材料方面面临着挑战.
- 农业废物,如玉米炉,为开发环保建筑部件提供了机会.
- 研究喀麦隆玉米炉灰 (CCSA) 的pozzolanic特性对于其在混凝土中的应用至关重要.
研究的目的:
- 评估用CCSA部分替代水泥对混凝土物理和机械性能的影响.
- 根据ASTM C618标准,对CCSA进行表征并确定其波佐兰性潜力.
- 评估混凝土的长期性能,其中包含不同百分比的CCSA.
主要方法:
- 玉米在600°C下了6个小时,以产生CCSA.
- 使用红外光谱,X射线光,细度和密度测试来鉴定CCSA的特征.
- 准备了四种混凝土混合物,其中0%,5%,10%和15%的CCSA替代物.
- 新鲜和硬化混凝土的性能在7,14,28和60天被测试,包括落,紧性,压力和曲强度,密度,吸水能力和孔隙性.
主要成果:
- CCSA 呈现出 73.97% SiO2 + Al2O3 + Fe2O3 的波佐兰性质,符合 ASTM C618 标准.
- 早期的混凝土强度 (0-28天) 通常随着CCSA的加入而下降.
- 使用10%CCSA替代品的混凝土在60天后显示出最佳的长期机械性能 (压力和屈曲强度).
- 与对照混凝土相比,10%的CCSA替代导致水的吸收和孔隙性较低.
结论:
- 用CCSA部分替换水泥是可行的,可以提高混凝土的长期耐用性.
- 10%的CCSA替代率优化了机械性能并减少了物理降解.
- 在具体应用中,CCSA显示出作为可持续的pozzolanic材料的前景,有助于废物利用.
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