Published Online: 1 September 2012
Page Count: 20
Assistant Professor, Dept. of Technology, Campus Box 5100, Illinois State Univ., Normal, IL
Zaman, Musharraf M.
David Ross Boyd Professor and Aaron Alexander Professor, School of Civil Engineering and Environmental Science, Norman, OK
Former Graduate Student, School of Civil Engineering and Environmental Science, The Univ. of Oklahoma, Norman, OK
(Received 29 November 2011; accepted 23 March 2012)
A test program was carried out to examine the relative behavior of normal-strength concrete (NSC) and high-strength concrete (HSC). The experimental program included macroscopic and microscopic study of NSC and HSC specimens (designed compressive strengths of 27.6 MPa and 82.8 MPa at 28 days). The macro-behavior of concrete was determined on the basis of multi-axial testing, while the micro-behavior was evaluated using acoustic emission (AE) test and optical petrographic microscopic analysis. The results reveal that, for both NSC and HSC, macro-responses are dependent on and a manifestation of various micromechanical changes. The normal-strength concrete yielded a very different behavior in changes of internal microstructure as compared to the high-strength concrete.
Paper ID: ACEM104569