DRYING AND SHRINKAGE BEHAVIOUR OF PORTLAND CEMENT MORTAR AT INTERMEDIATE BUT CONSTANT HYDRATION DEGREE

Author(s): G. Pham, A. Bauland, A. Delaplace, Q-H. Vu and 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: 152-159
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 various elementary steps of the overall process.

The strategy proposed here is to use them in 2 main sequential steps to analyze the mass loss and strain behavior over time after short curing time and to compare the results to those obtained on mimics corresponding to the samples at these curing times.

By using a thermodynamic-hydration tool (MoNTY) up to curing time, hydration is estimated. Then, relevant Thermal-Hydric-Hydration-Mechanical (THHM) properties as a function of water content at the intermediate curing time are calculated.

Code_ASTER is finally used to evaluate the material response and results are compared to experiments.

Results show that fixed transport properties is sufficient for predicting drying rate and linear drying shrinkage constitutive law is determined to be insufficient.

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