Concrete Science Research Brief: Modeling of Drying Shrinkage

Model of drying shrinkage
July 7, 2014

Drying shrinkage, resulting from the action of water and dissolved ions in the various pores in cement paste, can cause substantial problems in the use of concrete, such as surface cracking. This model links together quantitatively drying shrinkage, water sorption isotherm, and pore structure (sizes and connectivity) of cement paste. Thanks to its simplicity, it can be used for rapid predictions of water sorption isotherms and shrinkage for a paste with known pore structure or, vice-versa, to extract quantitative information on the pore structure from measured sorption and shrinkage data. Since mechanical properties are strongly influenced by evaporable water, the model will have a range of possible applications including materials design and quality control. MORE