Evaluation of the Performance and Microstructure of Ecofriendly Construction Bricks Made with Fly Ash and Residual Rice Husk Ash

Table 5

Ratios of peak area (AS) and peak height () from the FTIR spectra of brick specimens at Si–O–Si stretching vibration.

Sample code	URHA content (%)	Si–O–Si location (cm^−1)	AS ratio	ratio
P35U00	0	1078	1.000	1.000
P35U10	10	1084	0.977	0.952
P35U20	20	1086	0.034	0.128
P35U30	30	1088	0.031	0.115
P35U40	40	1091	0.029	0.106