Temperature variation and stresses in unreinforced concrete pavement containing RAP

• Published in: Construction & building materials 2020-12, Vol.263, p.120506, Article 120506
• Main Authors: Abraham, Sarah Mariam, Ransinchung, G.D.R.N.
• Format: Article
• Language: English
• Subjects: Nonlinear temperature variation; Pavement quality concrete; Reclaimed asphalt pavement; Temperature stress
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2020.120506

•Non – linear temperature variation observed in concrete prototype.•Temperature profile depicted in quadratic form.•RAP inclusive concrete prototypes have lower thermal stress.•Linear temperature variation assumption fails to identify nature of stress. Temperature profile and corresponding stresses in concrete pavement were investigated on prototype scale. Four prototypes were considered, conventional and 25%, 50% and 75% of fine-Reclaimed Asphalt Pavement (RAP) inclusive concrete mixes. The observed temperature profile during 270-days was nonlinear with higher degree of nonlinearity for conventional mixes. The profile could be represented in quadratic form which annuls the assumption of linear temperature variation in numerous design methodologies. The total temperature stresses were lower for RAP inclusive prototypes. Stresses with linear temperature profile assumption over or under-estimated and failed to identify the nature of the stress due to actual temperature profile.