COMPRESSIVE STRENGTH, SHRINKAGE AND MASS LOSS DURING SIMULTANEOUS HYDRATION AND DRYING OF CONCRETE: EXPERIMENTAL AND MODELING RESULTS

Author(s): B. Huet, A. Delaplace, G. Pham, R. Barbarulo
Book Title: RILEM International Symposium on Concrete Modelling - CONMOD 2014
Editor: Kefei Li, Peiyu Yan and Rongwei Yang
ISBN: 978-2-35158-139-1
e-ISBN: 978-2-35158-140-7
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 160-167
Total Pages: 8
Language: English

Abstract: Understanding hydration, drying and shrinkage is a challenge for the optimal design of concrete structures with supplementary cementitious materials (SCM). Different tools exist to model elementary steps of the overall process. The strategy proposed here is to solve sequentially the drying and hydration problem with an implicit scheme to analyze the mass loss, relative humidity profile, total strain and compressive strength behavior of concrete samples over time. Two types of conditioning are compared: 1) curing in sealed conditions for 28 days, 2) 1 or 7d of sealed curing followed by a drying period.

The difficulty to predict experimental results with the model suggest that some key properties should depend on paste hydration degree and phase assemblage and not merely on porosity and liquid saturation: 1) water sorption isotherm, 2) coefficient of shrinkage constitutive law, 3) mass transfer properties.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00