Naslov
APPLIANCE OF RAPID METHOD FOR DETERMINATION REACTIVE SILICA IN FLY ASH

Autori
Mužek, Mario Nikola ; Zelić, Jelica

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
XXII. Hrvatski skup kemičara i kemijskih inženjera, Zagreb 2011, Knjiga sažetaka / Tomašić, Vesna ; Maduna Valkaj, Karolina - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2011, 273-273

ISBN
978-953-6894-42-0

Skup
XXII. Hrvatski skup kemičara i kemijskih inženjera

Mjesto i datum
Zagreb, Hrvatska, 13.02.2011. - 16.02.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
reactive silica; fly ash; geopolymers

Sažetak
Thermal power plants produce large amounts of fly ash (FA), which must be disposed in landfills and is a significant environmental problem. Researches suggest that FA can be converted into geopolymers, which are good binders for construction. Reactive silica (SiO2) is the main active constituent located in the glass phase of the fly ash and the fraction of the total silica participating in the pozzolanic reactions. It controls the use of FA in cement and building materials. The aim of this work was to determine reactive silica in the fly ash by acid treatment followed by alkali digestion in a digestion bomb under pressure. The SiO2 content so obtained was precipitated as potassium hexafluorosilicate (K2SiF6). The precipitate was filtered, washed and hydrolyzed with warm water and finally titrated with NaOH. The percentage of reactive silica is calculated using equation[1]. [1] N.K. Katyal, J.M. Sharma, A.K. Dhawan, M.M. Ali, K. Mohan, Cem. Concr. Res, 38 (2008) 104-106.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA