A STUDY ON THE PROPERTIES OF SAND AT THAP YAI CHIANG MOUNTAIN AREA FOR GREEN SAND CASING
This research study examines the properties of sand at mountain areas from Baan Thap Yai Chiang, Phromphiram District in Phitsanulok, which is used in greensand casting. The study tested physical properties, chemical compositions and molding test attributes under the standards of the American Foundry Society (AFS) including green compressive strength (GCS) and permeability. The Design of Experiment (DOE) is two-level factorial designs which mixtures including sand, water, and bentonite. The results of the study showed that sand in the studied mountain areas contained 96.95% of silica, and 50.47% of grain fineness. The appropriate greensand casting ratio is 90.00% w/w of sand, 6.00% w/w of water and 8.00% w/w of bentonite, which had a positive impact to green compressive strength and permeability. Therefore, the sands in the selected mountain areas are likely to become a new source for greensand casting process.
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