Recycling of marine dredged materials coal fly ash and waste foundry sand as lightweight aggregates
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Date
2019
Authors
Erdogan, Pembe Ozer
Basar, Hatice Merve
Journal Title
Journal ISSN
Volume Title
Publisher
Gazi Univ Fac Engineering Architecture
Open Access Color
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Abstract
Nowadays sustainable environmental management of high quantities of marine dredged material (DM) together with other industrial wastes is a common problem across Turkey. The beneficial use/recovery of DM and wastes in the production of lightweight aggregate (LWA) instead of dumping at sea/disposal will provide substantial environmental savings in terms of circular economy. In this study the production of LWA by using marine DM coal fly ash and waste foundry sand were investigated. Three different mixtures of raw materials were granulated in pelletizing disc dried at 105 degrees C and sintered in muffle furnace at 1100 1150 1170 1180 and 1190 degrees C with 5-10 degrees C/min heating rates and 10-20 min sintering period. Sintered LWAs were analyzed in terms of physical mechanical microstructural mineralogical and leaching properties. LWA produced at 1190 degrees C sintering temperature 5 degrees C/min heating rate and 20 min sintering period resulted in better aggregate properties. Furthermore according to the leaching test results
it is observed that the parameters of the eluate and original waste were lower than the Class III (inert waste) landfilling limit values due to the entrapment of those into the silicate matrix in sintering process
thus causing no environmental risk to be used at construction sector.
it is observed that the parameters of the eluate and original waste were lower than the Class III (inert waste) landfilling limit values due to the entrapment of those into the silicate matrix in sintering process
thus causing no environmental risk to be used at construction sector.
Description
Keywords
Beneficial use, Lightweight aggregate, Dredged material, Fly ash, Waste foundry sand
Turkish CoHE Thesis Center URL
Fields of Science
Citation
3
WoS Q
Q4
Scopus Q
Q2
Source
Volume
34
Issue
3
Start Page
1378
End Page
1394