Implementation of recent research results to prevent reflection cracking

Title: Implementation of recent research results to prevent reflection cracking
Author(s): K. Kandil, Y. Hassan, A.O. Abd El Halim
Paper category : conference
Book title: Fourth International RILEM Conference on Reflective Cracking in Pavements - Research in Practice
Editor(s): A. O. Abd El Halim, D. A. Taylor
and El H. H. Mohamed
Print-ISBN: 2-912143-14-4
e-ISBN: 2351580265
Publisher: RILEM Publications SARL
Publication year: 2000
Pages: 527 - 536
Total Pages: 10
Nb references: 17
Language: English

Reflective cracking in asphalt concrete overlays is a serious pavement distress that can considerably affect the long-term performance of the pavement and increase the maintenance costs. Considerable research efforts have been expended towards the mitigation of the reflective cracking. Such efforts have included increasing the overlay thickness, using a relief layer, using pavement reinforcements, such as polymer grids, and improving the mix characteristics through better material selection and better mix design procedure. This latter approach, in particular, has received a great attention through the implementation of the Strategic Highway Research Program (SHRP). A recent approach that should complement these traditional efforts to mitigate reflective cracking through controlling construction-induced cracking is gradually gaining recognition. It has been shown that conventional rolling equipment can cause construction-induced cracks that are not sealed by either pneumatic-tire rollers or traffic tires. In order to control the construction-induced cracks and based on the theory of relative rigidity, two full-scale compactors, belonging to the same technology, Asphalt Multi-Integrated Roller (AMIR) Hot-Iron Process Asphalt Compaction (HIPAC), were designed and manufactured. Both AMIR and HIPAC compactors have an infinite radius, at the pavement-roller interface, and a soft interface with the asphalt concrete during compaction. Field trials have been conducted to compare the characteristics and long-term performance of pavement layers constructed using conventional and AMIR and HIPAC rollers. The results showed that AMIR and HIPAC compacted pavements have greater resilient modulus, more resistance to low temperature effect, and more fatigue life, with less variability than the conventional method. In addition, further research is also underway to develop a reliable in-situ testing procedure of the characteristics of pavement layers. Based on the findings of these different research efforts, a comprehensive approach is presented in this paper to minimize the development of reflective cracking.

Online publication: 2009-12-23
Publication type : full_text
Public price (Euros): 0.00