Evaluation of the Aggplus� System and Ssdetect System Against the Current Aashto T-84 and T-85

Abstract

Current AASHTO T-85 and T-84 procedures for determination of bulk specific gravity and absorption of coarse and fine aggregates are time consuming and repeatability is poor especially for angular fine aggregates with high absorption and rough surface texture. A total of eight coarse and 15 fine aggregate sources from Oklahoma were selected for evaluation of the AggplusTM system using the CoreLok device and the SSDetect system The objectives of this study were to determine if either the Aggplustm system or the SSDetect system could produce statistically similar results to the current AASHTO procedures. It was concluded that the CoreLok procedure for fine aggregate was the only procedure that produced statistically similar results to the AASHTO T-84 procedure. Also, It was concluded that the CoreLok and SSDetect methods for determining bulk specific gravity show better repeatability compared to AASHTO T-85 and T-84 and offer significant time savings over traditional methods.