研究活性化工业固体废弃物和挖掘土壤控制低强度材料的特性
Chen Xu1, Xiaolei Wang1, Libo Liu1
1College of Civil Engineering, Hebei University of Engineering, Handan 056038, China.
Materials (Basel, Switzerland)
|June 13, 2025
概括
这项研究开发了一种使用挖掘渣和工业废物用于公用事业道的零水泥回填材料. 这种新材料提供了一个可持续的替代品,减少了水泥的使用,促进了资源的再利用.
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.
- 环境工程 环境工程
背景情况:
- 市政公用事业道建设产生了大量的挖掘渣,这给处置带来了挑战.
- 传统的填充材料通常依赖于水泥,导致高碳排放.
- 需要可持续的,高性能的回填解决方案,利用废物材料.
研究的目的:
- 为封闭的公用事业道沟开发一种环保的零水泥填充材料.
- 利用挖掘渣和工业固体废物,制造一种可控制的低强度材料 (CLSM).
- 为了优化活性化CLSM的混合设计,以达到所需的流动性和机械性能.
主要方法:
- 开发了一种用激活的CLSM,使用挖掘渣,飞灰和钢渣作为精细聚合物,由NaOH激活.
- 研究了水与固体比率和粘合剂与沙子比率对CLSM流动性的影响.
- 分析了挖掘土壤,渣渣和NaOH含量对流动性和不受限制的压力强度 (UCS) 在3,7和28天的影响.
主要成果:
- 确定了最佳的混合参数:水与固体的比率为0.445和粘合剂与沙子的比率为0.30.
- CLSM流动性主要受到挖掘土壤和渣含量的影响;NaOH含量的影响最小.
- 不受限制的压力强度与渣和NaOH含量正相关,与挖掘土壤含量负相关.
结论:
- 使用工业固体废物和挖掘渣制备零水泥CLSM是可行的,符合实际要求.
- 沟回填补的建议混合物:50-60%的挖掘土壤,40-60%的渣渣和3-5%的NaOH以获得最佳性能.
- 这种绿色填充材料促进了资源的再利用,减少了能源消耗,并支持土木工程的可持续发展.
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