A multi-scale creep model for cement asphalt mortar

Author(s): K. C. Qiu, H. S. Chen, J. X. Hong, W. Sun, L. Sun
Paper category: Proceedings
Book title: Proceedings of the Seventh International Conference on Concrete under Severe Conditions – Environment and Loading
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjørv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 176-189
Total Pages: 14
Language : English

Abstract: The volume deformation of cement asphalt mortar (CAM) is critical to the stability and safety of the non-ballast slab track. Based on multi-scale homogenization approach, this contribution presents a creep model for hardened CAM. It takes into account pore water and investigates their effects on the CAM creep behaviour. In addition, the temperature effect on creep behaviour is also elucidated. The multi-scale homogenization approach is first employed to the cement asphalt paste (CAP) system formed of porosity, main hydrated products and asphalt emulsion particles, then to CAM, which is the composite of porosity, CAP and fine aggregate (sand). With this model, the evolution of the macroscopic behaviour of CAM subjected to constant loading is examined under different relative humidity and temperature. Finally, a creep experiment for CAM is conducted to validate the proposed creep model.

Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00