Relationship between static and dynamic elastic modulus of calcarenite heated at different temperatures: the San Julián’s stone
The San Julián’s stone is the main material used to build the most important historical buildings in Alicante city (Spain). This paper describes the analysis developed to obtain the relationship between the static and the dynamic modulus of this sedimentary rock heated at different temperatures. The rock specimens have been subjected to heating processes at different temperatures to produce different levels of weathering on 24 specimens. The static and dynamic modulus has been measured for every specimen by means of the ISRM standard and ultrasonic tests, respectively. Finally, two analytic formulas are proposed for the relationship between the static and the dynamic modulus for this stone. The results have been compared with some relationships proposed by different researchers for other types of rock. The expressions presented in this paper can be useful for the analysis, using non-destructive techniques, of the integrity level of historical constructions built with San Julián’s stone affected by fires.
KeywordsNon-destructive techniques Calcarenite stone Elastic dynamic modulus Elastic static modulus San Julián’s stone Temperature
The authors would like to thank Dr. D. Benavente and Dr. J. Martínez from the Earth Sciences Department and Applied Petrology Laboratory from the University of Alicante for allowing us to perform ultrasonic tests on their laboratories and Dr. J. M. Ortega from the Department of Civil Engineering from the University of Alicante for kindly performing the mercury intrusion porosimetry test. The companies U.T.E. FCC Construcción, S.A. and Enrique Ortiz e Hijos Contratistas de Obras, S.A. provided the rock samples from the TRAM tunnel excavation. This work has been partially funded by the University of Alicante projects uausti11–11 and gre09–40, the Spanish National project BIA2012-34316, and the Generalitat Valenciana project gv/2011/044.
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