Vol.2, No 1, 2004 pp. 141 - 151
UDC 666.943.2
THE DEPENDENCE OF PHYSICAL-MECHANICAL CHARACTERISTICS OF CEMENT ON FLY ASH ORIGIN
Gordana Stefanović1, Ljubica Ćojbašić1,
Živko Sekulić2, Snežana Heckmann3
1Faculty of Mechanical Engineering, Aleksandra Medvedeva 14, 18 000 Niš, Serbia and Montenegro
E-mail: goca@masfak.ni.ac.yu
2The Institute for technology, nuclear and other raw materials, Franche d' Epere 86, 11 000 Belgrade, Serbia and Montenegro
E-mail: z.sekulic@itnms.ac.yu
3AURAPLAN, Germany, E-mail: AURAPLAN@aol.de
Abstract. The paper presents the results of an investigation of the potential to use the fly ash as a component of cement mixtures. For this purpose, fly ash from 3 locations has been chosen: from Kragujevac (LP1), Svilajnac (LP2) and Vreoci (LP3). The research was conducted by making cement mixtures with the portions coming up to 10, 20, 30 and 50% of each mentioned type of ash.
The physical-mechanical characteristics of the cement mixtures created in this way have been determined.
On the basis of the obtained experimental results, the maximum content of fly ash in the cement mixtures has been determined. Also, the areas where the individual mixtures can be optimally applied, depending on their setting time, have been determined.
Key Words: Fly Ash, Portland Cement, Cement Mixture, Compressive Strength, Bending Strength, Specific Surface Area, Fly Ash Composition.
ZAVISNOST FIZIČKO-MEHANIČKIH KARAKTERISTIKA CEMENTA OD POREKLA LETEĆEG PEPELA
U ovom radu su dati rezultati ispitivanja mogućnosti korišćenja letećeg pepela kao komponente cementnih smeša. U tom smislu je izabran letećI pepeo sa 3 lokacije: Kragujevac (LP1), Svilajnac (LP2) i Vreoci (LP3). Ispitivanja su urađena tako što su napravljene cementne smeše sa učešćem 10, 20, 30 i 50% od svake navedene vrste pepela.
Određene su fizičko-mehaničke karakteristike tako napravljenih cementnih smeša.
Na osnovu dobijenih eksperimentalnih rezultata utvrđen je maksimalni sadržaj letećeg pepela u cementnim smešama. Takođe su određena i optimalna područja primene pojedinih smeša u zavisnosti od perioda očvršćavanja.
Ključne reči: Leteći pepeo, portland cement, cementna smeša, čvrstoća na pritisak, čvrstoća na savijanje, specifična površina, sadržaj letećeg pepela.