Abstract
The AE signals were detected in concrete specimen by means of Acoustic Emission Method during heating or cooling of concrete. The temperature when the first AE signal is detected, is lower than that when the dehydration of moisture in concrete takes place. This result suggests that the reason for the change of property of concrete subjected to high temperature cannot be explained only by the dehydration of moisture in concrete. It is the purpose of this paper to point out that the microscopic cracks are developed by the microscopic thermal stress due to the difference between the thermal expansion coeffcient of mortar and coarse aggregate. From the experimental results, it was proved that the mechanical properties of concrete subjected to the high temperature are influenced by the generation of microscopic stress and the formation of crack.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
