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The relation between concrete, mortar and paste scale early age properties [Elektronski vir]Klun, Martin ; Bosiljkov, Vlatko ; Bokan-Bosiljkov, VioletaMicrostructure development of concrete, mortar, and paste scale of cement-based material (CBM) during the early hydration stage has a significant impact on CBM%s physical, mechanical, and durability ... characteristics at the high maturity state. The research was carried out using compositions with increased autogenous shrinkage and extended early age period, proposed within the RRT+ programme of the COST Action TU1404. The electrical conductivity method, used to follow the solidification process of CBM, is capable of determining the initial and final setting time, and the end of the solidification process acceleration stage for the paste and mortar scale. Simultaneous ultrasonic P- and S-wave transmission measurements revealed that the ratio of velocities VP/VS is highly dependent on the presence of aggregates%it is considerably higher for the paste scale compared to the mortar and concrete scale. The deviation from the otherwise roughly constant ratio VP/VS for each scale may indicate cracks in the material. The non-linear correlation between the dynamic and static elastic moduli valid over the three scales was confirmed. Additionally, it was found that the static E-modulus correlates very well with the square of the VS and that the VS is highly correlated to the cube compressive strength%but a separate trendline exists for each CBM scale.Vir: Materials [Elektronski vir]. - ISSN 1996-1944 (Vol. 14, iss. 6, 23. mar. 2021, str. 1-24)Vrsta gradiva - e-članek ; neleposlovje za odrasleLeto - 2021Jezik - angleškiCOBISS.SI-ID - 57744899
Avtor
Klun, Martin |
Bosiljkov, Vlatko |
Bokan-Bosiljkov, Violeta
Teme
beton |
nivo malte in paste v betonu |
zgodnja starost |
razvoj mikrostrukture |
električna prevodnost |
električna prevodnost |
ultrazvočna metoda |
standardni testi |
concrete |
mortar and paste scale of cement-based material |
early hydration stage |
microstructure development |
electrical conductivity |
ultrasonic method |
standard test
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