DYNAMIC COMPRESSIVE BEHAVIOR OF RECYCLED AGGREGATE CONCRETE BASED ON SPLIT HOPKINSON PRESSURE BAR TESTS
Keywords:RECYCLED COARSE AGGREGATE (RCA), RECYCLED AGGREGATE CONCRETE (RAC), SPLIT HOPKINSON PRESSURE BAR TESTS, COMPRESSIVE STRENGTH, STRAIN-RATE.
THIS PAPER PRESENTS THE EXPERIMENTAL RESULTS OF RECYCLED AGGREGATE CONCRETE (RAC) SPECIMENS PREPARED WITH FIVE DIFFERENT AMOUNT OF RECYCLED COARSE AGGREGATE (RCA) [I.E. 0, 25%, 50%, 75% AND 100%] SUBJECTED TO IMPACT LOADING BASED ON SPLIT HOPKINSON PRESSURE BAR TESTS. STRAIN-RATE EFFECTS ON DYNAMIC COMPRESSIVE STRENGTH AND CRITICAL STRAIN OF RECYCLED AGGREGATE CONCRETE WERE STUDIED. RESULTS SHOW THAT IMPACT PROPERTIES OF RECYCLED AGGREGATE CONCRETE EXHIBIT STRONG STRAIN-RATE DEPENDENCY, AND INCREASE APPROXIMATELY LINEARLY WITH STRAIN-RATE. THE TRANSITION POINT FROM LOW STRAIN-RATE SENSITIVITY TO HIGH SENSITIVITY DECREASES WITH THE INCREASE OF MATRIX STRENGTH.
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