From the concrete to the paste: a scaling of the chemistry

Author(s): L. Oblak, L. Pavnick, D. Lootens
Paper category: Conference
Book title: Rheology and processing of Construction Materials – 7th RILEM International Conference on Self-Compacting Concrete and 1st RILEM International Conference on Rheology and Processing of Construction Materials
Editor(s): Nicolas Roussel and Hela Bessaies-Bey
Print ISBN: 978-2-35158-137-7
e-ISBN: 978-2-35158-138-4
Publisher: RILEM Publications SARL
Pages: 91-98
Total Pages: 8
Language: English

Abstract: 
The design of a concrete is a time consuming process which need large amounts of materials and generates huge costs. A reduction of this work is however possible if the characterization is only made with the equivalent or constituting paste of the mortar or concrete. In order to make the scaling between concrete and cement paste, isothermal and semi-adiabatic calorimetric techniques are used to follow the evolution of the heat rate and cumulative heat. The paper demonstrates that the results obtained with the isothermal calorimetry can be also generated with the semiadiabatic calorimetry which is a more suitable tool to follow the chemistry evolution during the hydration of cementitious material in the conditions met in the reality. We demonstrate the ability of the semi-adiabatic calorimeter to study the effects of the mixing protocol, admixture additions and curing conditions on the hydration kinetics of the concrete and its equivalent paste.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00