Stabilization/Solidification of Ladle Slag in Cement-stabilized Clay
Ladle furnace basic slag(ladle slag)is a by-product generated from the secondary steelmaking industry.The subsequent disposal of this slag in Singapore is problematic due to its quantity and impact on the environment.A possible solution is to incorporate the ladle slag with deep cement mixing for soft ground improvement.Hence,this study investigates the stabilization/solidification of the ladle slag in the cement-stabilized clay,focusing on the influence of ladle slag on mechanical properties of cement-stabilized soft clay and the leaching of heavy metals.A range of laboratory tests were conducted,including unconfined compressive strength(UCS),X-ray diffraction(XRD),scanning electron microscopy(SEM),and leaching tests.The results showed the addition of ladle slag slightly reduced the UCS of cement-stabilized clays at 14 days,but did not affect or even slightly increased the UCS at and after 28 days if the ladle slag/cement ratio was within 0.15.The leaching of heavy metal elements all meet the requirement of the non-hazardous waste standard.This implies the potential incorporation of ladle slag into soft clay stabilization as a sustainable waste management strategy.
Ladle slag Soft clay stabilization Unconfined compressive strength Microstructure
Bo Xu Kimberly Sze Ern Yeap Yaolin Yi
School of Civil and Environmental Engineering,Nanyang Technological University,Singapore 639798,Singapore
国际会议
The 8th International Congress on Environmental Geotechnics(第八届国际环境土工大会)
杭州
英文
403-409
2018-10-28（万方平台首次上网日期，不代表论文的发表时间）