29 August 2021 to 2 September 2021
Renaissance Minneapolis Hotel, The Depot
UTC timezone

Optimized spacing of the longitudinal reinforcement in CRCP to avoid horizontal cracking

Not scheduled
20m
Renaissance Minneapolis Hotel, The Depot

Renaissance Minneapolis Hotel, The Depot

Minneapolis, Minnesota, USA
Podium Presentation Design and Analysis

Description

Continuously reinforced concrete pavement (CRCP) is characterized by the absence of transverse contraction joints and the presence of longitudinal (and transverse) reinforcement. Field investigations on recently constructed CRCP’s in Flanders region of Belgium indicated horizontal cracking in the vicinity of the longitudinal reinforcement under the transverse cracks which eventually causes the punch-out distress at the edge of the pavement.
This paper shows the results of a finite element (FE) study to investigate the effect of varying the longitudinal reinforcement spacing and the concrete slab thickness on the risk of horizontal cracking in CRCP under typical Flanders conditions. For this purpose, a (3D) finite element model of CRCP was developed using FE package Diana 10.2. The longitudinal reinforcement spacing ranges from 100 mm to 200 mm in the edge region of the pavement while keeping the same steel ratio and the concrete slab thickness is varying from 200 mm to 350 mm. Development of the vertical stresses in the concrete along the depth of the pavement slab are plotted against the different longitudinal reinforcement spacing and slab thickness. Findings show that the maximum vertical tensile stress in the concrete occurs in the vicinity of the longitudinal reinforcement with maximum spacing of longitudinal reinforcement and with minimum thickness of the slab. The use of longitudinal reinforcement with the practically possible narrow spacing in the edge region of the pavement, where punch-out generally occurs, and a concrete slab with reasonable thickness could be a solution to reduce the horizontal cracking potential in CRCP.

Primary authors

Prof. Pieter De Winne (Agency for Roads and Traffic - Flanders Government) Mr Muhammad Kashif (Doctoral researcher, Department of Civil Engineering, Ghent University)

Co-authors

Mr Muhammad Wisal Khattak (Doctoral researcher, Department of Civil Engineering, Ghent University) Prof. Hans De Backer (Professor, Department of Civil Engineering, Ghent University)

Presentation Materials

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Paper

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