Field installation and design considerations of steel reinforcing netting to reduce reflection of cracks

Title: Field installation and design considerations of steel reinforcing netting to reduce reflection of cracks
Author(s): I. L. Al-Qadi, M. A. Elseifi
Paper category : conference
Book title: Fifth International RILEM Conference on Reflective Cracking in Pavements
Editor(s): C. Petit, I.L. Al-Qadi and A. Millien
Print-ISBN: 2-912143-47-0
e-ISBN: 2912143764
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 97 - 104
Total Pages: 8
Nb references: 9
Language: English

Abstract: Steel reinforcing nettings have been used successfully in Europe for the past two decades to improve hot-mix asphalt (HMA) resistance to reflective cracking. In 1999, the new class of steel reinforcement was installed for the first time in the U.S. in two sections at the Virginia Smart Road. This installation was successful and, through close monitoring, installation difficulties previously experienced with the interlayer system in the U.S. during the 1960s were solved. The objectives of this study are to present and recommend general guidelines to ensure successful installation of the interlayer system and to investigate the effects of different design parameters on the interlayer's effectiveness in delaying the reflection of cracks. Two simple linear regression equations, which were developed based on the results of three-dimensional (3D) finite element (FE) models, were used to investigate the effects of the overlay design parameters on the percentage of improvement resulting from the use of steel reinforcement. Based on this analysis, it was found that steel reinforcement is very effective in the lower 25 mm of the HMA overlay, where bottom-up fatigue and reflection cracks are initiated. This is explained by the fact that the closer the crack is to the interlayer, the more pronounced the steel reinforcement contribution is.

Online publication: 2004-04-15
Publication type : full_text
Public price (Euros): 0.00