Comparison of fracture test standards for a super pave dense-graded hot mix asphalt

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• 作者：Calvin Maurice Stewart^a ; ^{cmstewart@utep.edu} ; Jesú ; s Gerardo Reyes^a ; ^{jgreyes4@miners.utep.edu} ; Victor M. Garcia^b ; ^{vmgarcia5@miners.utep.edu}
• 关键词：Fracture resistance ; Hot mix asphalt ; Test standards ; Digital image correlation ; Repeatability
• 刊名：Engineering Fracture Mechanics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：169
• 期：Complete
• 页码：262-275
• 全文大小：1967 K
• 卷排序：169

文摘

The objective of this work is to compare the semi-circular bend (SCB) and disk-compact tension (DCT) fracture tests for asphalt-aggregate mixtures. Fracture tests are performed. Statistical analysis, digital image correlation, and 3D scans show that the SCB tests measure a low fracture resistance with a high coefficient of variation due to stress concentrations and plasticity developing at the anvil contact point. The DCT test is found to measure a high fracture resistance with a low coefficient of variation. The DCT tests is determined to provide a superior measurement of fracture resistance. Evidence concerning the physical problems with SCB is provided.