Calculation method of representative value of inorganic binder strength based on combined standard uncertainty

Abstract

This paper analyzes the limitations of calculating the representative value using standard deviation. Based on the measurement uncertainty evaluation theory and method, this paper proposes to use the combined standard uncertainty to calculate the representative value instead of standard deviation. In this way, the representative values of the test results from a certain guarantee rate based on the combined standard uncertainty can reflect the degree of dispersion of the series of test data values, and can also reflect the impact on the measurement objects, instruments, methods, conditions and personnel on the test data. Taking the unbounded compressive strength and flexural tensile strength of inorganic binders on highway pavements as examples, a method of calculating representative values of unbounded compressive and flexural strength based on combined standard uncertainty is established. The establishment of article conclusions, providing a new application path for national standards “Assessment and Expression of Measurement Uncertainty.”