Figure 1
Schematical illustration of a proposed liner structure assisted by a partially EICP-treated sand layer. Step 1: Precipitation of CaCO3 crystal facilitates bonding between sand particles. Manipulation of EICP composition controls number of excess calcium cations remaining in the sand layer. Step 2: The \({\text{SO}}_{4}^{2 - }\) ions in the leachate react with pre-existing calcium cations, rapidly precipitating gypsum crystals in the sand layer which acts as a leachate reservoir with a relatively larger void space.
