Laboratory method for assessing shrinkage cracking potential in stabilised pavements

Title: Laboratory method for assessing shrinkage cracking potential in stabilised pavements
Author(s): S. Chakrabarti, J. Kodikara
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: 605 - 612
Total Pages: 8
Nb references: 7
Language: English

Abstract: The cracking due to drying shrinkage is a major issue associated with the usage of cementitiously stabilised materials (CSM) in road pavement construction. Since the creep strain that develops in the mix has the effect of reducing the induced shrinkage stress, proper determination of shrinkage and creep strain is important in the accurate estimation of shrinkage/tensile stress that may develop, and, therefore, the on-set of cracking. The aim of the project was to develop effective and convenient laboratory test equipment and procedures for evaluating the shrinkage cracking resistance of stabilised materials commonly used in road construction. Laboratory testing was carried out to investigate shrinkage, tensile strength, and creep behaviour using one conventional cementitious binder and one binder comprising industrial waste products. Locally available basaltic crushed rock was used as pavement materials. Test results highlighted the effects of binder types on the shrinkage and tensile strength development in the pavement material. It is established that cracking potential of a stabilised material could be evaluated by comparing tensile stress with the tensile strength. Creep had a significant effect on tensile stress development in the pavement material, and the pavement designer should take this into consideration.

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