Evaluation of the measurement uncertainty of the stiffness modulus: test case of indirect tensile on cylindrical specimens

This study treats the measurement uncertainties that we can find in stiffness modulus of bituminous test. We present all sensors installed on rigidity chains and also their uncertainty ranges. Several parameters influence module's value, such as related to experimental conditions, others are rather connected equipment's specification, which speed, loading level, temperature, tested sample dimension, data acquisition, etc. All these factors have a great value rigidity. To qualify factors, used two approaches: first one is made by following method described GUM (Guide expression measurement), second approach based numerical simulation Monte Carlo. The results then compared for an interval confidence 95%. paper shows employment basic methods statistical analysis, Comparing variances. Essential concepts been compiled determination module discussed. It has demonstrated biggest source error measuring process repeatability contribution around 45.23%.