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Effect of a heating–cooling cycle on elastic strain and Young’s modulus of high performance and ordinary concrete
Abstract In this paper, the variations of elastic strain and Young modulus of high performance concrete and ordinary concrete during a heating–cooling cycle is presented. For the HPC, two heating rates are applied: 1.5 and 0.1 °C/min corresponding respectively to accidental and service conditions. For ordinary concrete, the results of service conditions are given. The temperatures of 400 and 220 °C are the heating’s final temperature phase of the accidental and service conditions respectively. The present work analyses the differences between the value of the elastic strain and the Young’s modulus at the beginning of the test (at ambient temperature), the end of the heating part and the end of the cooling part of each variation. Indeed, during the heating phase, the corresponding heating rates are applied until successive constant temperature levels are achieved: 150, 200, 300 and 400 °C for the high-performance concrete under accidental conditions and 140, 190 and 220 °C for both high-performance and ordinary concrete under service conditions. Those applied temperatures are maintained for several hours to ensure the stabilisation of internal temperature and physico-chemical thermo dependent processes. Moreover, the influence of the difference in mix concretes between the two types of concretes and the heating rate influence on those variations is also presented.
Effect of a heating–cooling cycle on elastic strain and Young’s modulus of high performance and ordinary concrete
Abstract In this paper, the variations of elastic strain and Young modulus of high performance concrete and ordinary concrete during a heating–cooling cycle is presented. For the HPC, two heating rates are applied: 1.5 and 0.1 °C/min corresponding respectively to accidental and service conditions. For ordinary concrete, the results of service conditions are given. The temperatures of 400 and 220 °C are the heating’s final temperature phase of the accidental and service conditions respectively. The present work analyses the differences between the value of the elastic strain and the Young’s modulus at the beginning of the test (at ambient temperature), the end of the heating part and the end of the cooling part of each variation. Indeed, during the heating phase, the corresponding heating rates are applied until successive constant temperature levels are achieved: 150, 200, 300 and 400 °C for the high-performance concrete under accidental conditions and 140, 190 and 220 °C for both high-performance and ordinary concrete under service conditions. Those applied temperatures are maintained for several hours to ensure the stabilisation of internal temperature and physico-chemical thermo dependent processes. Moreover, the influence of the difference in mix concretes between the two types of concretes and the heating rate influence on those variations is also presented.
Effect of a heating–cooling cycle on elastic strain and Young’s modulus of high performance and ordinary concrete
Hassen, Sabeur (author) / Colina, Horacio (author)
2012
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2012
Elastic strain, Young's modulus variation during uniform heating of concrete
| Online Contents | 2007