Assessment of stability test methods for self consolidating concrete old bachelour dating site

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Advances in Civil Engineering and Sustainable Construction (ACESC'16) International Conference, proceedings pro103.Microorganisms-Cementitious Materials Interactions International RILEM Conference, proceedings pro102.To monitor local change in ultrasonic velocity, the process consists of using a pair of transducers at different depths of the concrete.The aim of our experimental study was to establish the relationship between ultrasonic velocity measured by sensors of 50 mm diameter and of 54 k Hz frequency, and homogeneity of fresh concrete.Measurements of wave propagation velocity are carried out every half an hour on a vertical channel whose dimensions (in mm) are 160 × 160 × 700.These measurements have been determined with three modes of transmission: direct, semi-direct and indirect.One type of steel fibers (SF), three types of polypropylene fibers (PP1, PP2 and PP3) as well as one type of glass fibers (GF) with different fiber volume fractions and aspect ratios were conducted.

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Frost Action in Concrete International RILEM Conference Materials Systems and Structures in Civil Engineering 2016 (MSSCE 2016), proceedings pro114.Electrochemistry in Civil Engineering International RILEM Conference Materials Systems and Structures in Civil Engineering 2016 (MSSCE 2016), proceedings pro111.Historical Masonry International RILEM Conference Materials Systems and Structures in Civil Engineering 2016 (MSSCE 2016), proceedings pro110.The proposed method can be performed either at laboratory or at field with and without sampling.Moreover, it can be directly adapted to the cast concrete in structural members provided that there is no obstruction for penetration.