Sintering of fly ash based composites with zeolite and bentonite addition for application in construction materials | Zendy

Anja Terzić | Zendy; Nataša Djordjević | Zendy; Miodrag Mitrić | Zendy; Smilja Marković | Zendy; Katarina Djordjević | Zendy; Vladimir B. Pavlović | Zendy

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Sintering of fly ash based composites with zeolite and bentonite addition for application in construction materials

Author(s) -

Anja Terzić,

Nataša Djordjević,

Miodrag Mitrić,

Smilja Marković,

Katarina Djordjević,

Vladimir B. Pavlović

Publication year - 2017

Publication title -

science of sintering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.309

H-Index - 25

eISSN - 1820-7413

pISSN - 0350-820X

DOI - 10.2298/sos1701023t

Subject(s) - fly ash , bentonite , materials science , zeolite , sintering , microstructure , compaction , cement , composite number , sorption , pozzolan , composite material , thermogravimetric analysis , chemical engineering , adsorption , chemistry , biochemistry , portland cement , organic chemistry , engineering , catalysis

Due to pozzolanic characteristics, fly ash is commonly used as a cement replacement in construction composites. Addition of natural clays with sorption ability (i.e. zeolite and bentonite) in to the fly ash based construction materials is of both scientific and industrial interest. Namely, due to the application of sorptive clay minerals, it is possible to immobilize toxic heavy metals from the composite structure. The thermal compatibility of fly ash and zeolite, as well as fly ash and bentonite, within the composite was observed during sintering procedure. The starting components were used in 1:1 ratio and they were applied without additional mechanical treatment. The used compaction pressure for the tablets was 2 t•cm-2. The sintering process was conducted at 1000ºC and 1200ºC for two hours in the air atmosphere. The mineralogical phase composition of the non-treated and sintered samples was analyzed using X-ray diffraction method. Scanning electron microscopy was applied in the analysis of the microstructure of starting and sintered samples. The thermal behavior was observed via DTA method. The influence of temperature on the properties of fly ash-zeolite and fly ash-bentonite composites was investigated. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. III 45008 and OI 172057

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