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Experimental study of concrete behaviour in compression under high level sustained loads

Tailhan, J.L. / Maou, F. Le / Rossi, P. / Boulay, C. / Fakhri, P. / Saussol, J.L.

The paper presents an adaptation of a 'classical' device developed at the LCPC for studying creep on concrete in compression under high level of sustained loads. The results of the first tests on normal (28 and 143 days old) concrete specimens are shown. The corresponding load levels are 30 %, 50 % and 70 % of the material compressive strength (ref. 28 days). Specimes are cylinders of a 16 cm diameter and a 100 cm height, sealed and unsealed. Tests are performed in a controlled environment (T = 20+-1 deg C and HR = 50+-5 %). Their durations are from three to six months (six months is the one of the lowest load level, i.e. 30 %). Longitudinal strains are continuously measured during the tests. Crack patterns are also noted on unsealed specimens. Two tests are lightly overloaded in order to obtain the failure. Failure modes are observed and compared to the one of a classical compressive test. Results are given and discussed. They tend to show that cracking processes are more diffuse in creep tests than in classical compression tests.

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Experimental study of concrete behaviour in compression under high level sustained loads

Tailhan, J.L. / Maou, F. Le / Rossi, P. / Boulay, C. / Fakhri, P. / Saussol, J.L.

The paper presents an adaptation of a 'classical' device developed at the LCPC for studying creep on concrete in compression under high level of sustained loads. The results of the first tests on normal (28 and 143 days old) concrete specimens are shown. The corresponding load levels are 30 %, 50 % and 70 % of the material compressive strength (ref. 28 days). Specimes are cylinders of a 16 cm diameter and a 100 cm height, sealed and unsealed. Tests are performed in a controlled environment (T = 20+-1 deg C and HR = 50+-5 %). Their durations are from three to six months (six months is the one of the lowest load level, i.e. 30 %). Longitudinal strains are continuously measured during the tests. Crack patterns are also noted on unsealed specimens. Two tests are lightly overloaded in order to obtain the failure. Failure modes are observed and compared to the one of a classical compressive test. Results are given and discussed. They tend to show that cracking processes are more diffuse in creep tests than in classical compression tests.

Experimental study of concrete behaviour in compression under high level sustained loads

Tailhan, J.L. / Maou, F. Le / Rossi, P. / Boulay, C. / Fakhri, P. / Saussol, J.L.

The paper presents an adaptation of a 'classical' device developed at the LCPC for studying creep on concrete in compression under high level of sustained loads. The results of the first tests on normal (28 and 143 days old) concrete specimens are shown. The corresponding load levels are 30 %, 50 % and 70 % of the material compressive strength (ref. 28 days). Specimes are cylinders of a 16 cm diameter and a 100 cm height, sealed and unsealed. Tests are performed in a controlled environment (T = 20+-1 deg C and HR = 50+-5 %). Their durations are from three to six months (six months is the one of the lowest load level, i.e. 30 %). Longitudinal strains are continuously measured during the tests. Crack patterns are also noted on unsealed specimens. Two tests are lightly overloaded in order to obtain the failure. Failure modes are observed and compared to the one of a classical compressive test. Results are given and discussed. They tend to show that cracking processes are more diffuse in creep tests than in classical compression tests.

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Title:

Experimental study of concrete behaviour in compression under high level sustained loads

Additional title:

Experimentelle Untersuchung des Betonverhaltens bei hohen ungedämpften Druckbeanspruchungen

Contributors:

Tailhan, J.L. (author) / Maou, F. Le (author) / Rossi, P. (author) / Boulay, C. (author) / Fakhri, P. (author) / Saussol, J.L. (author)

Published in:

Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures, International Conference on Creep, Shrinkage and Durability of Concrete and Concrete Structures, 8 ; 447-452

Publication date:

2009

Size:

6 Seiten, 10 Bilder, 1 Tabelle, 10 Quellen

ISBN:

978-0-415-47586-0

Type of media:

Conference paper

Type of material:

Print

Language:

English

Keywords:

Beton , Druckbeanspruchung , Kriechen (Werkstoff) , Hydratationsdauer , Rissbildung , mechanische Spannungsverteilung , Schädigung , Schwindung , Zement , Zuschlagstoff , Sand

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