Use of spent foundry sand and fly ash for the development of green self-consolidating concrete |
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Authors: | Mustafa Şahmaran Mohamed Lachemi Tahir K Erdem Hasan Erhan Yücel |
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Affiliation: | (1) Department of Civil Engineering, Gaziantep University, Gaziantep, Turkey;(2) Department of Civil Engineering, Ryerson University, Toronto, ON, Canada;(3) Department of Civil Engineering, Izmir Institute of Technology, Izmir, Turkey; |
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Abstract: | In the United States alone, the foundry industry discards up to 10 million tons of sand each year, offering up a plentiful
potential resource to replace sand in concrete products. However, because the use of spent foundry sand (SFS) is currently
very limited in the concrete industry, this study investigates whether SFS can successfully be used as a sand replacement
material in cost-effective, green, self-consolidating concrete (SCC). In the study, SCC mixtures were developed to be even
more inexpensive and environmentally friendly by incorporating Portland cement with fly ash (FA). Tests done on SCC mixtures
to determine fresh properties (slump flow diameter, slump flow time, V-funnel flow time, yield stress, and relative viscosity),
compressive strength, drying shrinkage and transport properties (rapid chloride permeability and volume of permeable pores)
show that replacing up to 100% of sand with SFS and up to 70% Portland cement with FA enables the manufacture of green, lower
cost SCC mixtures with proper fresh, mechanical and durability properties. The beneficial effects of FA compensate for some
possible detrimental effects of SFS. |
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