Properties of Cement Paste Using Mine Tailing and Polymer Materials
In this study, mine tailings obtained in a region near to Youngwol Sangdong(Korea) was used to investigate the contamination of heavy metal ions. Some amount of mine tailings and lignin(AE agent) were added in the general cement pastes, of which the compressive strength and leaching rate were investigated. X-ray fluorescence analysis shows that the major constituents of mine tailings arc 56.9wt% of SiO2, 10.8wt% of Fe2O3, 11.2wt% of CaO and 11.4wt% of Al203, and the major phases are quartz and calcite. In the content of heavy metal ions, the concentration of As ion is the highest as 257.261mg/e.When mine tailings and lignin were added in cement pastes, the compressive strength was higher in the cement pastes adding only lignin. Lignin addition significantly improved the compressive strength of cement pastes by approximately 15% when being cured in distilled water. The compressive strength was lower in the cement pastes adding mine tailings than in the cement pastes not adding. The leaching rates of Cr, Pb and As ion in distilled water were decreased in the cement pastes adding lignin, compared to in the cement pastes not adding. The leaching rates of all heavy metal ions in the cement pastes curing for 28 days were within the maximum permitted limits in KSLT and EPT method. Therefore, it is thought that mine tailings can be used as an ecological material.
Mine tailing Lignin Cement paste Compressive strength Ecological.
Kyung-Nam Kim Jin-Ho Kim Dae-Yong Shin Beom-Goo Lee Hvun Park
Dept.of Advanced Materials Engineering, Kangwon National Univ.245-711, Korea Hub Univ.for Industry Collaboration, Kangwon National Univ., 200-701, Korea Institute of Korea Energy Technology, Geumcheon-gu, Seoul, 153-772, Korea
国际会议
10th International Symposium on Eco-Materials Processing and Design(第10届国际生态材料加工与设计研讨会)
西安
英文
623-626
2009-01-13（万方平台首次上网日期，不代表论文的发表时间）