BauxsolTM based grouts and shotcretes for the control of acid rock drainage

酸性岩石排水（ARD）发生在硫化物（主要是黄铁矿，但也有其他金属的硫化物）暴露于氧气和水的地方；估计来自ARD的全球负债超过3000亿美元。目前还没有经济有效的方法来防止暴露的硫化物矿物释放出酸和重金属，特别是在废弃的矿区。本研究调查了BASECONTM转化铝土矿精炼厂残留物（BauxsolTM）在废石堆和尾矿坝上的应用，并开发了可喷在开孔墙和地板上的混凝土，以防止和处理ARD形成。

Acid rock drainage (ARD) occurs where sulphides (mostly pyrite, but also sulphides of other metals) are exposed to oxygen and water; the estimated global liability from ARD is over US$300 billion. There is currently no cost-effective way to prevent the release of acid and heavy metals from exposed sulphide minerals especially at abandoned mine sites. This study investigates the use of BASECONTM transformed bauxite refinery residues (BauxsolTM) to grout waste rock dumps and tailings dams and to develop concretes that can be sprayed on open cut walls and floor to prevent and treat the ARD as it is formed.