使用黄金矿石尾矿以及回收粗聚合物生产的地聚合物混凝土的耐久性特性
Eshwarayya Bolluru Lokesha1, Mangalpady Aruna2, Sandi Kumar Reddy2
1Dept. of Mining Engineering, National Institute of Technology, Karnataka, Surathkal, Dakshina Kannada, 575025, Mangaluru, Karnataka, India. eshwarayyabl.217mn003@nitk.edu.in.
Scientific reports
|April 8, 2025
概括
黄金矿石尾矿 (GOT) 可以取代地聚合物混凝土 (GPC) 中的河沙. 虽然GPC的硫酸盐攻击率略高于常规混凝土,但它表现出优越的化物耐受性和地质聚合能使GOT中的危险金属固定不动.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 土木工程 土木工程是指土木工程.
背景情况:
- 黄金矿石尾矿 (GOT) 是一个重要的采矿废物流,可能引起环境和健康问题.
- 废弃GOT带来了长期的环境挑战.
- 研究像GOT这样的工业副产品的替代用途对于可持续的废物管理至关重要.
研究的目的:
- 评估使用GOT作为地质聚合物混凝土 (GPC) 生产中部分取代河流沙的可行性.
- 评估包含GOT的GPC的耐用性特征,特别是抗硫酸盐和化物攻击的耐用性.
- 为了确定地质聚合的潜力,使GOT中存在的危险金属无法移动.
主要方法:
- 地质聚合物混凝土 (GPC) 样品是使用GOT作为河流沙子的替代品生产的.
- 通过将GPC和常规混凝土 (CC) 样品浸入5%硫酸溶液中来测试硫酸盐耐受性.
- 使用快速透测试 (RCPT) 评估了离子透率.
- 使用有毒特征漏程序 (TCLP) 来分析GOT中的金属度.
主要成果:
- 与CC样本相比,在硫酸盐攻击下,GPC样本的压力强度和重量在压力强度和重量下降略大.
- GPC样本的化离子透率明显低于CC样本.
- TCLP的分析显示,GOT中含有高度的危险金属,化物含量最小.
结论:
- 地质聚合为GOT在混凝土生产中的可持续利用提供了一种可行的方法.
- 包括GOT在内的GPC显示出有前途的耐用性,特别是在抵御化物入方面.
- 地质聚合有效地固定了GOT中的危险金属,减轻了与废弃物处置相关的环境风险.
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