Evaluation of equivalent delamination driving coefficient in bonded concrete overlays

Olubanwo, Adegoke Omotayo; Karadelis, John; Abbey, Samuel Jonah; Olubanwo, A O

Abstract

This study investigates failure due to interfacial delamination in a bonded concrete overlay system comprising Polymer Modifies Roller Compacted Concrete (PMRCC) overlay and substrate Ordinary Portland Concrete (OPC). Optimum overlay mix was designed using Composite Desirability Analysis (CDA). Intrinsic complex stresses along the plane of the interface resulting from differential length change and elastic mismatched properties between the two bonded layers were investigated. Distinct delamination cases involving variable structural scales were investigated using both laboratory determined fracture parameters and ANSYS zero-thickness Interface Cohesive Zone Model (ICZM) concept. The FEA results showed that the restraint capacity of the interface varies as a function of overlay structural scale and its associated mismatched elastic parameters.

• Journal Article Type: Article
• Acceptance Date: May 1, 2017
• Online Publication Date: May 10, 2017
• Publication Date: 2017-05
• Deposit Date: Nov 4, 2020
• Publicly Available Date: Nov 6, 2020
• Journal: International Journal of Civil Engineering and Technology
• Print ISSN: 0976 - 6308
• Electronic ISSN: 0976 - 6316
• Publisher: International Association of Engineering and Management Education
• Peer Reviewed: Peer Reviewed
• Volume: 8
• Issue: 5
• Pages: 1436-1444
• Keywords: Delamination; PMRCC; OPC; FEA; ICZM
• Public URL: https://uwe-repository.worktribe.com/output/3285922