Evaluation and Development of Performance-Engineered Specifications for Monotonic Loading Cracking Performance Assessment Tests and Indicators

Abstract

This study investigated the validity of various monotonic cracking performance assessment testing standards and indicators to describe the expected cracking performance in the field. A total number of 17 field test sections with known field cracking performance were selected and evaluated. Field cores were extracted from these sections, and a comprehensive laboratory testing program was carried out. The authors conducted four monotonic testing standards and calculated 11 performance indicators. The study findings showed that there was no direct correlation between the laboratory testing results of monotonic tests and indicators and the observed field cracking performance. The variable air void content and thickness of the extracted field cores are believed to influence the laboratory testing results of monotonic tests and indicators. Therefore, this study proposed an alternative approach to develop performance specifications (thresholds) for monotonic tests and indicators. The thresholds were developed indirectly using a correlation between cyclic testing and both monotonic tests and the observed field cracking performance. The results demonstrated the effectiveness and success of the proposed approach in developing performance thresholds. Pass/fail cracking performance assessment thresholds were proposed for various monotonic indicators to distinguish between asphalt mixes with good, fair, and poor cracking resistance. Besides, the study recommends the Weibull cracking resistance index, determined from the indirect tension test, as a simple performance indicator to assess mixes resistance to cracking.

Performance Assessment of Waste Cooking Oil-Modified Asphalt Mixtures

“…Several performance assessment tests were proposed and evaluated to assess asphalt mixtures' cracking and rutting resistance [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48]. In this study, the authors selected two of the most promising monotonic cracking and rutting assessment tests: the Indirect Tensile Asphalt Cracking Test (IDEAL) and the High-temperature Indirect Tensile (High-IDT) Rutting Assessment Test, respectively.…”

“…The BMD implements the performance assessment specifications to assess mixture performance. It is defined as "pre-determined thresholds/limits that need to be achieved for a given performance indicator obtained from a given performance assessment test to assess mix resistance to a specific distress" [48]. Several thresholds were proposed for CT Index and HI-IDT Strength indicators [48,78,79].…”

“…It is defined as "pre-determined thresholds/limits that need to be achieved for a given performance indicator obtained from a given performance assessment test to assess mix resistance to a specific distress" [48]. Several thresholds were proposed for CT Index and HI-IDT Strength indicators [48,78,79]. In this study, a mixture shall have a minimum value of 26.4 and 110 KPa of CT Index and HI-IDT Strength , respectively, to be approved [48,56].…”

“…Several thresholds were proposed for CT Index and HI-IDT Strength indicators [48,78,79]. In this study, a mixture shall have a minimum value of 26.4 and 110 KPa of CT Index and HI-IDT Strength , respectively, to be approved [48,56].…”

“…The primary objective of such tests is to discern mixtures that exhibit inadequate performance (e.g., rutting, cracking) during the mix design or production phases using well-established performance thresholds. Several studies have proved the ability of such tests to assess the performance of asphalt mixtures [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48].…”