DYNAMIC COMPRESSIVE BEHAVIOR OF RECYCLED AGGREGATE CONCRETE BASED ON SPLIT HOPKINSON PRESSURE BAR TESTS
DYNAMIC COMPRESSIVE BEHAVIOR OF RECYCLED AGGREGATE CONCRETE BASED ON SPLIT HOPKINSON PRESSURE BAR TESTS
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DOI：
10.1590/s1679-78252014000100008
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发表时间：
2014
影响因子：
1.2
通讯作者：
Yubin Lu
中科院分区：
文献类型：
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作者：
Yubin Lu
本文介绍了再生粗骨料（RCA）掺量为0、25%、50%、75%和100%的再生粗骨料混凝土（RAC）试件在劈裂Hopkinson压杆冲击荷载作用下的试验结果。研究了应变率对再生骨料混凝土动压强度和临界应变的影响。结果表明，再生骨料混凝土的冲击性能具有很强的应变率依赖性，并随应变率近似线性增加。从低应变率敏感到高应变率敏感的转变点随基体强度的增加而减小。
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.