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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: 2020

    CODEN: JTEVAB

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    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,

    Cai, Zhaoyi
    Institute of Geotechnical Engineering, School of Transportation, Southeast University, Nanjing,

    Xu, Jian
    Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing,


    Stock #: JTE20180261

    ISSN:0090-3973

    DOI: 10.1520/JTE20180261

    Author
    Title Effects of Curing Temperature and Dosage on the Performance of GGBS-MgO-CaO in Stabilizing/Solidifying Heavy Metal–Contaminated Site Soil
    Symposium ,
    Committee D34