Naslov
INVESTIGATION OF PORTLAND CEMENT SETTING ACCELERATOR
(ISPITIVANJE UBRZIVAČA VEZANJA PORTLAND CEMENTA)

Autori
Vrbos, Nevenka ; Šitum, Ana ; Šipušić, Juraj

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

Izvornik
International Conference MATRIB 2012 / Alar, Željko ; Jakovljević, Suzana - Zagreb : Hrvatsko društvo za materijale i tribologiju (HDMT), 2012, 371-378

Skup
International Conference MATRIB 2012 materials/tribology/recycling

Mjesto i datum
Vela Luka, Hrvatska, 20.06.2012. - 22.06.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Portland cement; setting accelerators; hydration; setting time; strength

Sažetak
Portland cement (PC) hydration consists of numerous individual physicochemical processes in complex interaction, e.g. processes of individual PC clinker minerals dissolution and precipitation of diverse hydration products. Hydration reaction is affected by substances dubbed concrete additives. These substances cause notable effects during the hydration reaction of fresh cement composite and modify its rheological properties, as well as those of hardened material. The scientific focus of this paper is the effect of calcium chloride, CaCl2, as setting accelerator on Portland cement hydration. In order to draw conclusions, it was necessary to determine optimal quantities of added CaCl2 for all effects tested (setting acceleration, increase in early compressive strengths etc.) The nature of the products of Portland cement hydration with CaCl2 addition was tested with X-ray diffraction analysis (XRD) as well as infrared spectroscopy (FTIR) methods.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Temeljne tehničke znanosti

POVEZANOST RADA