通过使用RSM建模,提高基于GGBFS的自压缩地质聚合物混凝土与煤底灰和金属混合的性能和可持续性
Naraindas Bheel1, Mamdooh Alwetaishi2, Idris Ahmed Jae3
1Department of Civil and Environmental Engineering, Universiti Teknologi Petronas, 32610, Bandar Seri Iskandar, Teronoh, Perak, Malaysia. naraindas04@gmail.com.
Scientific reports
|August 26, 2024
概括
这项关于自压缩地质聚合物混凝土 (SCGC) 的研究发现,用煤底灰 (CBA) 和金属 (MK) 取代地面颗粒高炉渣 (GGBFS) 高达10%,可以提高机械性能和耐用性. 可加工性下降,但观察到强度和透性降低.
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.
- 可持续的建筑材料 可持续的建筑材料
背景情况:
- 地质聚合物混凝土 (GPC) 为普通波特兰水泥 (OPC) 提供了一个可持续的替代品.
- 地质颗粒高炉渣 (GGBFS) 是GPC中常见的粘合剂,但其可用性和成本可能是有限的.
- 煤底灰 (CBA) 和甲 (MK) 是潜在的补充性水泥材料 (SCM),可以部分取代GGBFS.
研究的目的:
- 研究用CBA和MK部分取代GGBFS对自压缩地质聚合物混凝土 (SCGC) 性能的影响.
- 评估CBA和MK结合的SCGC的新鲜性质,机械性能和耐用性.
- 使用响应表面方法学建立SCGC属性的预测模型.
主要方法:
- 准备了195个SCGC样本,其中CBA和MK的百分比不同,取代了GGBFS (高达10%).
- 新鲜性质 (沉积流量,V道,T50流量),机械性质 (压力,分裂拉力,屈曲强度) 和耐久性 (透性,硫酸盐攻击) 在28天后进行了测试.
- 长期耐用性 (长度变化) 被评估为180天.
- 响应表面方法和ANOVA用于开发和验证预测模型.
主要成果:
- 随着CBA和MK含量的增加,SCGC的可操作性下降.
- 机械性能 (压力,分裂拉力,屈曲强度) 在最多10%的更换后显著改善.
- 在28天内,压力强度达到59.40 MPa,分裂拉伸强度5.68 MPa,曲强度6.12 MPa,5%的CBA和5%的MK替换.
- 透性随着CBA和MK含量增加而降低.
- 在7.5%的MK和7.5%的CBA替代180天后观察到的最小长度变化 (0.062毫米).
- 嵌入式碳减少了CBA添加,但增加了MK添加.
- 预测模型实现了高准确度 (R2从88%到99%) 与95%的信心.
结论:
- 将GGBFS部分替换为CBA和MK,最高可达10%,有利于提高SCGC的机械性能和耐用性.
- 使用高达10%的CBA和MK替代的SCGC提供了更好的强度和更低的透性.
- 开发的预测模型可靠地估计SCGC属性.
- 这种优化的SCGC配方被推用于结构应用,因为它提高了性能和可持续性潜力.
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