Control of reflective cracking in cement stabilized pavements
Title: Control of reflective cracking in cement stabilized pavements
Author(s): W. S. Adaska, D. R. Luhr
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
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 309 - 316
Total Pages: 8
Nb references: 14
Abstract: Cracks occur in flexible (asphalt) pavements for various reasons. Some cracks are indicative of failure in the pavement, such as fatigue cracking or cracking due to base failure. Other cracks, such as reflective cracks from cement-stabilized pavement bases, are mainly cosmetic in nature and do not reduce the pavements smoothness or serviceability. However, if wide cracks (greater than 6 mm) occur, they can result in poor load transfer and increased stress in the pavement, eventually leading to performance problems. Several factors contribute to the cracking and crack spacing in a cement-stabilized base including material characteristics, construction procedures, traffic loading, and restraint imposed on the base by the subgrade. With regard to material characteristics, the type of soil, cement content, degree of compaction and curing, and temperature and moisture changes directly influence the degree of shrinkage.
There are a number of preventative measures and design concepts that can be used to minimize shrinkage cracking in the cement-stabilized base, and to reduce the potential that base cracks will reflect through the asphalt surface. Methods of controlling reflective cracking include proper construction and curing of the stabilized base, reduction of crack size through the use of "pre-cracking", and relief of stress concentrations through the use of flexible layers in the pavement structure.
Online publication: 2004-04-15
Publication type : full_text
Public price (Euros): 0.00