通过活性化,可持续地利用铜矿废弃物制成建筑材料
Seyed Mohammad Fattahi1, Mohammad Yaqoob Nastooh2, Ali Heydari2
1Department of Civil and Environmental Engineering, Amirkabir University of Technology, Hafez Avenue, Tehran, Iran. fattahi.m.s@aut.ac.ir.
Scientific reports
|February 3, 2026
概括
铜矿废物 (CMW) 可以通过使用酸转化为强大的,稳定的活性粘合剂. 这种矿山尾矿的可持续利用提供了一个低二氧化碳的替代粘合剂,没有补充材料.
科学领域:
- 材料科学 材料科学 材料科学
- 地质化学 地质化学
- 可持续工程 可持续工程
背景情况:
- 铜矿废物 (CMW) 带来了环境挑战,但也是低二氧化碳结合剂的酸的潜在来源.
- 目前对活性材料 (AAMs) 的研究经常使用CMW与波特兰水泥或其他前体,使单独来自CMW的结合剂未得到充分探索.
研究的目的:
- 调查CMW作为唯一用于粘合剂生产的酸前体的性激活.
- 评估基于CMW的AAM的机械性能,耐用性,浸出行为和微观结构.
主要方法:
- 来自Sarcheshmeh矿的CMW使用NaOH,Na2SiO3或它们的混合物来激活.
- 标本在25°C下愈了7天和28天.
- 评估的不受限制的压力强度 (UCS),切割模量,冷解耐用性,浸出 (pH,EC,TDS,ICP-OES) 和微观结构 (FE-SEM/EDS).
主要成果:
- 酸盐激活产生了最高的UCS (16.5 MPa在28天),超过了NaOH激活样本.
- 冷-解循环导致12个循环后~23%的强度损失.
- 漂水试验表明近乎中性的pH值,低离子释放,以及在密集的凝中有效固定重金属 (N-A-S-H/C-A-S-H/N-Fe-A-S-H).
结论:
- 在没有补充材料的情况下,CMW可以成功地被提升为机械坚固和化学稳定的活性粘合剂.
- 这项研究表明,在循环经济框架下,利用铜矿尾矿是一种可行的,可持续的途径.
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