New experimental approach to accelerate the development of internal swelling reactions (ISR) in massive concrete structures

2021 ◽  
Vol 313 ◽  
pp. 125388
Author(s):  
Jacques Jabbour ◽  
Aveline Darquennes ◽  
Loic Divet ◽  
Rachid Bennacer ◽  
Jean-Michel Torrenti ◽  
...  
Keyword(s):  
Experimental Approach ◽  
Concrete Structures ◽  
Massive Concrete

scholarly journals Optimization of concrete mix design to account for strength and hydration heat in massive concrete structures

2019 ◽  
Vol 103 ◽  
pp. 233-241 ◽  
Author(s):  
Agathe Bourchy ◽  
Laury Barnes ◽  
Laetitia Bessette ◽  
Florian Chalencon ◽  
Aurélien Joron ◽  
...  
Keyword(s):  
Concrete Structures ◽  
Hydration Heat ◽  
Mix Design ◽  
Massive Concrete ◽  
Concrete Mix Design ◽  
Concrete Mix

Fly-Ash Concretes of 50% of the Replacement Ratio to Reduce the Cracking in Concrete Structures

2013 ◽  
Vol 405-408 ◽  
pp. 2665-2670 ◽  
Author(s):  
Ming Jie Mao ◽  
Qiu Ning Yang ◽  
Wen Bo Zhang ◽  
Isamu Yoshitake
Keyword(s):  
Fly Ash ◽  
Concrete Structures ◽  
High Volume ◽  
Pozzolanic Reaction ◽  
Strength Development ◽  
Early Age ◽  
Replacement Ratio ◽  
Fly Ash Concrete ◽  
Massive Concrete ◽  
Normal Strength

Fly-ash concrete used in massive concrete structure has superior advantages to reduce hydration heat. On the other hand, the fly-ash concrete has negative property of low strength development at early age because pozzolanic reaction of fly-ash activates at mature age, such as after 28 days. To investigate these characteristics of fly-ash used in concrete, the present study discusses thermal cracking possibility of fly-ash concrete by using FE analysis software. The present study employs prediction formulae proposed by Zhang and Japanese design code in the simulations. The objects in this study are normal strength concrete mixed of fly-ash up to 50% of replacement ratio to cement. The comparative investigations show that temperature effect is more significant than strength development at early age. Based on the analytical study, high volume fly-ash concretes of 30-50% of the replacement ratio can be concluded as effective and useful materials to reduce the cracking possibility in massive concrete structures. Keywords-Fly-ash concrete; Early Age, Prediction Formulae for Strength; Thermal Stress Analysis

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