Comparison of concrete creep test methods as per Russian and foreign normative documents. Part 2. Testing and processing of results

Abstract

Introduction. The main approaches to long-term creep tests of concrete regulated by GOST 24544-2020, valid in the Russian Federation, as well as foreign ISO, ASTM, and EN standards, are analyzed.Aim. In this work, fundamental differences in conducting tests following Russian and foreign standards are determined. These efforts are essential and urgent, since, in order to use test results obtained abroad in Russia, it is necessary to harmonize test methods and initial test parameters (samples, measuring and test equipment, etc.).Materials and methods. The article reviews testing procedures, controlled parameters, and processing of result; part 1 of the article covered the application, testing and measuring equipment, manufacturing process, sample parameters and fittings, and test preparation.Results. ISO, ASTM, and EN are comparable; however, they differ greatly from GOST 24544 in some respects, in particular, regarding the sample parameters and the methods of their installation in the testing equipment.Conclusion. Further harmonization of GOST 24544 with the aforementioned foreign standards is necessary.