The Multiple Stress Creep Recovery Test: A Detailed Analysis of Repeatability and Reproducibility

The Multiple Stress Creep Recovery Test (MSCR) was recently introduced to evaluate bituminous binders at high service temperatures, in particular to evaluate the stress or loading resistance

Abstract

The Multiple Stress Creep Recovery Test (MSCR) was recently introduced to evaluate bituminous binders at high service temperatures, in particular to evaluate the stress or loading resistance. This test allows classifying binders at the high PG temperature, according to the traffic loading, starting from standard, to heavy, very heavy and extreme traffic loading. It is the intention that this test includes non-linear binder properties. 

In this study, five laboratories have participated in a round robin test to evaluate the repeatability and reproducibility of the parameters derived from the MSCR test. Nine different binders were evaluated, including unmodified, slightly and highly modified binders. The MSCR tests were conducted at 50°C, and each laboratory performed testing five times under repeatability conditions. The test results were analysed according to ISO 5725 and observations and reasons for deviating test results are discussed in detail. 

KEYWORDS: rheology, creep, recovery, polymer modified, reproducibility

The findings of a joint study on the recently implemented Multiple Stress Creep Recovery Test (MSCR) will be presented at the 5th European Asphalt Technology Association Conference in Braunschweig, Germany, June 3-5 www.eata2013.eu

Authors

Hilde Soenen,Timo Blomberg from Nynas,Terhi Pellinen, Olli-Ville Laukkanen from Aalto University in Finland.