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Computers and Concrete Volume 19, Number 1, January 2017, pages 033-39 DOI: http://dx.doi.org/10.12989/cac.2017.19.1.033 |
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Effect of aggregate type on heated self-compacting concrete |
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Hamoon Fathi and Tina Lameie
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| Abstract | ||
| In this study, two types of aggregate were used for making self-compacting concrete. Standard cubic specimens were exposed to different temperatures. Seventy-two standard cylindrical specimens (150x300 mm) and Seventy-two cubic specimens (150 mm) were tested. Compressive strengths of the manufactured specimens at 23oC were about 33 MPa to 40 MPa. The variable parameters among the self-compacting concrete specimens were of sand stone type. The specimens were exposed to 23, 100, 200, 400, 600, and 800oC and their mechanical specifications were controlled. The heated specimens were subjected to the unconfined compression test with a quasi-static loading rate. The corresponding stress-strain curves and modulus of elasticity were compared. The results showed that, at higher temperatures, Scoria aggregate showed less sensitivity than ordinary aggregate. The concrete made with Scoria aggregate exhibited less strain. The heated self-compacting concrete had similar slopes before and after the peak. In fact, increasing heat produced gradual symmetrical stress-strain diagram span. | ||
| Key Words | ||
| thermal effects; self-compacting concrete; elastic module; stress-strain curve; aggregate types | ||
| Address | ||
| Hamoon Fathi and Tina Lameie: Young Researchers and Elite Club, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran | ||