The relation between concrete, mortar and paste scale early age properties

Klun, Martin (avtor), Bosiljkov, Vlatko (avtor), Bokan-Bosiljkov, Violeta (avtor)

Microstructure 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 V$_P$/V$_S$ 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 V$_P$/V$_S$ 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 V$_S$ and that the V$_S$ is highly correlated to the cube compressive strength—but a separate trendline exists for each CBM scale.

• Jezik: Angleški jezik
• Ključne besede: concrete, mortar and paste scale of cement-based material, early hydration stage, microstructure development, electrical conductivity, ultrasonic method, standard tests
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FGG - Fakulteta za gradbeništvo in geodezijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2021
• Št. strani: 24 str.
• Številčenje: Vol. 14, iss. 6, art. 1569
• PID: 20.500.12556/RUL-127258
• UDK: 620.1:691
• ISSN pri članku: 1996-1944
• DOI: 10.3390/ma14061569
• COBISS.SI-ID: 57744899
• Datum objave v RUL: 31.05.2021

Gradivo je del revije

• Naslov: Materials
• Skrajšan naslov: Materials
• Založnik: MDPI
• ISSN: 1996-1944
• COBISS.SI-ID: 33588485

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 23.03.2021

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: beton, nivo malte in paste v betonu, zgodnja starost, razvoj mikrostrukture, električna prevodnost, ultrazvočna metoda, standardni testi