Impact of trace metals Zn, Cu, Cd and Ni on the reactivity of OPC and GGBS-based hydraulic binders at early age for sediment stabilization - Archive ouverte HAL Access content directly
Journal Articles Construction and Building Materials Year : 2022

Impact of trace metals Zn, Cu, Cd and Ni on the reactivity of OPC and GGBS-based hydraulic binders at early age for sediment stabilization

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Abstract

The Solidification/Stabilization method was demonstrated to be an effective remediation technology for hazardous waste treatment. Three types of binding agents were tested in the present study in view of their potential use in solidification of contaminated sediments and soils-Portland cement (OPC), Granulated ground blast furnace slag (GGBS) activated by OPC and a Supersulfated (SSC) binders. An investigation into the impact of trace metals Zn, Cu, Ni and Cd on the hydration of the binders was performed by adding them into pure binders' systems. Hydration heat evolution of the binders was assessed through isothermal calorimetry and hydration products were analysed through XRD, NMR and XAFS analysis. Copper and zinc present the most perturbing effect on the early hydration delaying the main hydration peak occurrence while nickel and cadmium ions do not perturb or accelerate it. For example, the GGBS/OPC formulation without any metal addition has its MHP at 13.5h, with the addition of 0.5%Zn the MHP appears 37h later, with 0.5%Cu 11.5 h later, but with Ni and Cd 5 h earlier. The SSC formulation was shown to be the most sensitive on the trace metals addition. The electrokinetic and conductivity measurements of the binders using Zeta Potential apparatus showed a decrease in obtained values in the presence of Cu and Zn and an increase in the presence of Ni and Cd confirming the different behaviours of TM in the considered systems.
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Dates and versions

hal-03820228 , version 1 (18-10-2022)

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Tetiana Gutsalenko, Alexandra Bourdot, Valérie Montouillout, Aveline Darquennes, Thomas Wattez, et al.. Impact of trace metals Zn, Cu, Cd and Ni on the reactivity of OPC and GGBS-based hydraulic binders at early age for sediment stabilization. Construction and Building Materials, 2022, 346, pp.128406. ⟨10.1016/j.conbuildmat.2022.128406⟩. ⟨hal-03820228⟩
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