Biocementation Influence on Flexural Strength and Chloride Ingress by Lysinibacillus sphaericus and Bacillus megaterium in Mortar Structures

Table 2

XRD (% w/w ± SD values) summary for hydrated OPC microbial mortars prepared and cured in respective bacteria against control OPC mortar after 28^th day of curing.

Hydration compound	Mortar category (% w/w ± SD)
	OPC-H2O (H2O)	OPC-LB (LB)	OPC-BM (BM)
Bavenite, Al2Be2Ca4H2O28Si9
Sample 1	—	2.55	1.36
Sample 2	—	2.52	1.33
Sample 3	—	2.51	1.29
Average	—	2.53	1.33
Std. dev.	—	±0.02	±0.03
% Average ± SD	—	2.53 ± 0.02	1.33 ± 0.03
Dellaite, Ca6H2O13Si3
Sample 1	83.89	83.49	84.21
Sample 2	83.95	83.47	84.18
Sample 3	83.94	83.45	84.16
Average	83.93	83.47	84.18
Std. dev.	±0.03	±0.02	±0.02
% Average ± SD	83.93 ± 0.03	83.47 ± 0.02	84.18 ± 0.02
Calcite, CaCO3
Sample 1	0.67	10.26	10.24
Sample 2	0.63	10.22	10.29
Sample 3	0.61	10.21	10.27
Average	0.64	10.23	10.27
Std. dev.	±0.02	±0.02	±0.02
% Average ± SD	0.64 ± 0.02	10.23 ± 0.02	10.27 ± 0.02
Portlandite, CaH2O2
Sample 1	15.43	3.86	4.21
Sample 2	15.48	3.82	4.17
Sample 3	15.49	3.84	4.19
Average	15.47	3.84	4.19
Std. dev.	±0.03	±0.02	±0.02
% Average ± SD	15.47 ± 0.03	3.84 ± 0.02	4.19 ± 0.02