In 20% CBA treated soft clay (see Fig.10) the increased formation of CSH resulted in increased strength compared to 20% CBA control soft clay (see Fig. 10). Ettringite formation in 20% CBA treated soft clay, was nonexpansive and filled the pore structure in samples resulted in dense structure and increased the compressive strength. Min and Mingshu [50]. The XRD results (see Figs. 10) shows increased intensity of CSH and nonexpansive ettringite in CBA treated soft clay (5% and 10%) responsible for the strength development in concrete where as in 15% bacterial treated CKD concrete, reduction in cement content reduced the required alkalinity (needed for hydration reaction) which in turn decreased the CSH and thus reduced the strength compared to control concrete.