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Stamatia Gavela Nikolaos Nikoloutsopoulos George Papadakos Dimitra Passa Anastasia Sotiropoulou

Abstract

The objective of the study is to introduce an experimental un­cer­tainty budget process for concrete compressive strength test, based on a pro­to­col that incorporates effects of multiple factors significant for the measure­ment result. The proposed procedure is rather useful for laboratories seeking accreditation according to ISO/IEC 17025, in order to emphasize the contri­bu­tion of type A uncertainty estimations, rather than relying on type B estimations that are unable to address the correlation between those factors. Two indepen­dent experiments were performed. Experiment I is proposed as a simple, suit­ably designed, reproducibility trial for laboratories performing EN 12390 test method, i.e. when a specified nominal curing age is targeted, following experi­mental design on multiple uncertainty parameters. A sensitivity analysis was introduced based on a semi-empirical multifactorial regression model (experi­ment II) for concrete compressive strength as a function of specimen’s curing age and W/C ratio. The present study is an effort towards an integrated and standardized method for experimental, semi-empirical multifactorial re­gression estimation of the uncertainty budget for the EN 12390 test method, being useful, also, as a baseline for internal quality control programs when ad­justed for the specific characteristics of concrete specimens tested by a laboratory.

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Section
SI: Research activities of the Greek Society of Experimental Mechanics of Materi

How to Cite

Gavela, S., Nikoloutsopoulos, N., Papadakos, G., Passa, D. and Sotiropoulou, A. (2019) “Experimental uncertainty budget for concrete compressive strength test based on a multifactorial analysis ”, Frattura ed Integrità Strutturale, 13(50), pp. 383-394. doi: 10.3221/IGF-ESIS.50.32.