A micromechanical approach to computing linear and nonlinear moisture and temperature stresses in concrete pavements

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Temperature and moisture gradients can cause significant tensile stresses in concrete pavement, which can lead to cracking without the occurrence of any mechanical loads. Currently, most analysis and design methods assume linear distribution of thermal and hygrothermal strains through the slab depth, which usually underestimates the critical tensile stresses in the concrete pavement. A novel micromechanical approach to calculate the moisture curling stresses in concrete pavements based on measured relative humidity gradients is proposed. In this approach, the loss in moisture from the cement microstructure creates a negative pressure in the concrete capillary pores, which ultimately produces the bulk concrete shrinkage and moisture curling (differential shrinkage). The hygrothermal strain at each point in the slab depth is calculated through the Kelvin-Laplace and Mackenzie equations, which provide a basis for calculating the moisture curling stresses at any time, similarly to the formulation for calculating temperature curling stresses. The evolution of stresses due to nonlinear temperature and moisture gradients are calculated based on field measurements with consideration for the tensile creep of concrete. The proposed formulation allows for a concise analytical solution to evaluate the effects of moisture and temperature curling on slab size and the concrete's material constituents.

Original languageEnglish (US)
Title of host publicationAdvanced Characterisation of Pavement and Soil Engineering Materials - Proceedings of the International Conference on Advanced Characterisation of Pavement and Soil Engineering Materials
Pages1563-1570
Number of pages8
StatePublished - Dec 1 2007
EventInternational Conference on Advanced Characterisation of Pavement and Soil Engineering Materials - Athens, Greece
Duration: Jun 20 2007Jun 22 2007

Publication series

NameAdvanced Characterisation of Pavement and Soil Engineering Materials - Proceedings of the International Conference on Advanced Characterisation of Pavement and Soil Engineering Materials
Volume2

Other

OtherInternational Conference on Advanced Characterisation of Pavement and Soil Engineering Materials
Country/TerritoryGreece
CityAthens
Period6/20/076/22/07

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials

Fingerprint

Dive into the research topics of 'A micromechanical approach to computing linear and nonlinear moisture and temperature stresses in concrete pavements'. Together they form a unique fingerprint.

Cite this