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Modeling moisture warping in concrete pavement



Title: Modeling moisture warping in concrete pavement
Author(s): W. Hansen, Y. Wei, E. Schlangen
Paper category : conference
Book title: International RILEM Symposium on Concrete Modelling - ConMod '08
Editor(s): E. Schlangen and G. De Schutter
Print-ISBN: 978-2-35158-060-8
e-ISBN: 978-2-35158-076-9
Publisher: RILEM Publications SARL
Publication year: 2008
Pages: 715 - 723
Total Pages: 9
Nb references: 18
Language: English


Abstract: Internal self-desiccation and pore discontinuity are both properties of cement hydration. As long as a concrete slab is cured sealed (i.e. without exposure to drying and wetting) a uniform moisture gradient develops within a cross section. Thus, warping deformation does not occur.
New results presented in this study on concrete beam uplift and autogenous shrinkage demonstrate that a moderate water-cement ratio system (0.40-0.45), typical for highway concrete in the USA, can develop significant moisture warping uplift if the top surface is exposed to drying while the bottom surface is in contact with water. Finite Element analysis was found to be in good agreement with measurements. Moisture profile predictions within a cross section show three contributing components. They are: self-desiccation, drying shrinkage at the top, and water uptake at the bottom from wetting. The predictions further demonstrate that pore-discontinuity limits moisture transport within a cross section.


Online publication: 2009-06-15
Publication type : full_text
Public price (Euros): 0.00