Comportement du béton au jeune âge sous différentes conditions thermiques
|Advisor:||Bissonnette, Benoît; Marchand, J.|
|Abstract:||Cementitious materials are used increasingly in the field of civil construction. Several experimental investigations are conducted to better understand the mechanisms controlling the behaviour of concrete and identify the factors responsible to ensure both durability and strength. But the so-called high performance concretes are likely to crack in the first hours after the initiation of the hydration reaction. The durability of concrete is thus affected. This constitutes a challenge for today. This research has been initiated with this perspective in mind. The term young age represents the first days, even the first few hours following the initiation of the reaction of hydration of cement grains. Currently, there is no procedure or experimental setups standardized to assess the behaviour of concrete from an early age. The Research Center on Concrete Infrastructures (CRIB) has developed an experimental device that simulates the behaviour of concrete under conditions of restricted deformation. The assembly, called the assembly for restrained shrinkage deformations (R2D2) was improved as part of this study to help examine the influence of temperature on the behaviour of concrete at early age. Several concrete were formulated and tested based on three types of cements. Five water /cement ratios were tested and several thermal profiles were applied. The influence of the water /cement ratio, the mineralogical composition of cement and the effect of the temperature on the concrete behaviour have been investigated in more depth.|
|Document Type:||Thèse de doctorat|
|Open Access Date:||18 April 2018|
|Collection:||Thèses et mémoires|
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