Publication detail
The comparison of the effect of Zinc compounds on hydration of ordinary Portland cement
MATĚJKA, L. ŠILER, P. NOVOTNÝ, R. ŠVEC, J. MÁSILKO, J.
Original Title
The comparison of the effect of Zinc compounds on hydration of ordinary Portland cement
Type
conference proceedings
Language
English
Original Abstract
The content of heavy metals in various secondary industrial products and alternative fuels increases with the ecological push for reuse of waste materials and recycling. This effect is especially visible in the Portland cement properties. The cement production often involves burning of old tires as fuel and source of iron oxide and ground communal waste or industrial waste sludge as cheap fuel. The burning of waste in rotary kiln introduces heavy metal into cement clinker that have adverse effects on the properties and use of cement. Zinc has been proven to drastically increase of induction period of cement setting. The negative effect of zinc compounds on hydration of ordinary Portland cement was measured by isoperibolic calorimetry. Zinc was added to the cement in the form of two soluble salts of Zn(NO3)2 hydrate, ZnCl2 and a poor soluble compound ZnO. The concentration of zinc added was chosen as 0.1, 0.5 and 1 mass %. The results show significant retardation of cement hydration with increasing zinc content with ZnO causing most drastic increase in induction period.
Keywords
Portland cement, Hydration, Zinc, Heavy metals, isoperibolic calorimetry
Authors
MATĚJKA, L.; ŠILER, P.; NOVOTNÝ, R.; ŠVEC, J.; MÁSILKO, J.
Released
21. 11. 2019
Publisher
Vysoké učení technické v Brně, Fakulta chemická, Purkyňova 464/188 612 00 Brno
Location
Brno
ISBN
978-80-214-5807-9
Book
Sborník abstraktů
Edition number
první
Pages from
82
Pages to
82
Pages count
90
BibTex
@proceedings{BUT162090,
editor="Lukáš {Matějka} and Pavel {Šiler} and Radoslav {Novotný} and Jiří {Švec} and Jiří {Másilko}",
title="The comparison of the effect of Zinc compounds on hydration of ordinary Portland cement",
year="2019",
number="první",
pages="82--82",
publisher="Vysoké učení technické v Brně, Fakulta chemická, Purkyňova 464/188 612 00 Brno",
address="Brno",
isbn="978-80-214-5807-9"
}