Naslov
Characterization of cement materials prepared with addition of accelerator for shotcrete

Autori
Vrbos, Nevenka ; Žagar, Danijel ; Šipušić, Juraj

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Abstracts Book and Proceedings on USB of International Conference on Materials, Tribology, Recycling, MATRIB 2016 / Žmak, Irena ; Aleksandrov Fabijanić, Tamara ; Ćorić, Danko - Zagreb : Hrvatsko društvo za materijale i tribologiju (HDMT), 2016, 426-437

Skup
International Conference on Materials, Tribology, Recycling, MATRIB 2016

Mjesto i datum
Vela Luka, Hrvatska, 23.06.2016. - 25.06.2016

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
portland cement; accelerators; shotcrete; setting; compressive strength

Sažetak
Shotcrete are composite materials used for rock stabilization at steep slopes and in tunnels due to its setting time of only a few minutes. A further peculiarity of this material is its application to the surface by jet spraying, so-called concrete-gunning. In this work, hydration of Portland cement (PC) and Portland cement with various mass fraction additions of commercial product Kedobet AS 301 as an additive for the preparation of materials (shotcrete) with very short setting times has been investigated. The effect of additives on hydration kinetics was investigated in situ by calorimetry and powder X-ray diffraction of extracted material. The prepared materials do not show affinity towards cracking and expansive reactions, attain very short setting times and thus satisfies the requirements for composite placement by jet spraying.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Temeljne tehničke znanosti

POVEZANOST RADA