Performance Evaluation of Crumb Rubber Asphalt Modified with Silicone-Based Warm Mix Additives

Table 6

FT-IR spectral data of CRM binders with and without WMA additives.

Wavenumber cm^−1	Functional group	Literature value	Reference
2921, 2850	−CH2 and −CH3 stretching (Alkanes)	2850–2960	[29], [55, 56]
1600	−C=C stretching (Aromatics)	1600	[31], [55, 56]
1460	CH2 bending (aliphatic)	1460	[56]
1375	CH3 bending (aliphatic)	1375	[56]
1100	−Si–O–Si Asymmetric stretching	1000–1100	[31, 55]
1030	−S=O sulfoxide	1030	[56]
810, 722	−C-H benzene ring	810, 722	[29]