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Volume 48, Issue 5 (September 2020)
Effects of Curing Temperature and Dosage on the Performance of GGBS-MgO-CaO in Stabilizing/Solidifying Heavy Metal–Contaminated Site Soil
(Received 14 April 2018; accepted 1 August 2018)
Published Online: 2018
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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.
Department of Civil Engineering, Institute of Geotechnical Engineering, School of Transportation, Southeast University, Nanjing,
Institute of Geotechnical Engineering, School of Transportation, Southeast University, Nanjing,
Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing,
Stock #: JTE20180261
Title Effects of Curing Temperature and Dosage on the Performance of GGBS-MgO-CaO in Stabilizing/Solidifying Heavy Metal–Contaminated Site Soil