Naslov
The hydration kinetics in industrial cements with addition of waste zeolite and mud from a zinc-plating plant

Autori
Dabić, Pero ; Krolo, Petar ; Barbir, Damir

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

Izvornik
Non-TraditionalCement & Concrete III / Bílek, Vlastimil and Keršner, Zbyněk - Brno : Brno University of Technology, 2008, 155-162

ISBN
978-80-214-3642-8

Skup
NON-TRADITIONAL CEMENT & CONCRETE III

Mjesto i datum
Brno, Češka Republika, 10.06.2008. - 12.06.2008

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Portland cement hydration ; Waste zeolite ; Solidification/Stabilization ;

Sažetak
The study has examined the effect of waste zeolite saturated with Zn2+ - ions and residual mud from wastewaters from the zinc-plating plant on the Portland cement hydration processes. The development of hydration heat was traced in hydration of Portland cement, CEM I, with additions of waste zeolite and the waste zeolite + mud mixture, in quantities from 0 – 40 mass %. The values for specific conductivity of cement pastes were determined with additions of saturated zeolite and the saturated zeolite mud mixture, in quantities from 0 – 50 mass %. The measurements were made at 20 oC and the water/solid ratio, W/S = 0.5. Hydration heats were determined by differencial microcalorimetry up to 48 hours of hydration, and the specific conductivity by a digital conductometer using metal electrodes. The results obtained for hydration heat indicate that the additions used affect the cement hydration kinetics. Kinetic curves clearly show the effects of additions on hydration processes. When the addition content increases, especially mud, the processes slow down, and the values of heat measured are lower. When the addition content increases, the has higher values, and the curves recorded do not have a typical shape with an expressed maximum.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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