Journal Published Online: 19 December 2018
Volume 48, Issue 5

Effects of Curing Temperature and Dosage on the Performance of GGBS-MgO-CaO in Stabilizing/Solidifying Heavy Metal–Contaminated Site Soil

CODEN: JTEVAB

Abstract

This study investigated the effects of curing temperature and dosage on the performance of ground-granulated blast-furnace slag–magnesium oxide–calcium oxide (GMC) in treating heavy metal–contaminated site soil. Samples were cured for 28 days at curing temperatures of 4°C, 21°C, and 45°C, and the binder dosages of GMC applied in this study were 5, 10, and 15 %. Curing temperature and dosage were found to affect the performance of GMC in different degrees. The strength development of GMC mixes curing at 45°C is 3–5 times higher than that curing at 4°C and 21°C. The raise of the curing temperature and dosage reduces the lead (Pd) leached. The integrity of GMC mixes after each drying–wetting cycle is improved with the raise of binder dosage. The strength losses of GMC5, GMC10, and GMC15 after freeze–thaw cycles are at 52.6 %, 52.3 % and 51.3 %, respectively.

Author Information

Wang, Fei
Department of Civil Engineering, Institute of Geotechnical Engineering, School of Transportation, Southeast University, Nanjing, People’s Republic of China
Cai, Zhaoyi
Institute of Geotechnical Engineering, School of Transportation, Southeast University, Nanjing, People’s Republic of China
Xu, Jian
Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing, People’s Republic of China
Pages: 10
Price: $25.00
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Stock #: JTE20180261
ISSN: 0090-3973
DOI: 10.1520/JTE20180261