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Material Properties of Retested Specimens Composed of Tailings, Cement, and Blast-Furnace Slag.

PB97133276

Publication Date	1996
Personal Author	Tesarik, D. R.; Seymour, J. B.; Lane, W. L.
Page Count	24
Abstract	Four combinations of binder and cycloned tailings were cast into cylindrical specimen molds. The specimens were then tested in a servo-hydraulic loading frame to determine 28- and 90-day unconfined compressive strength and apparent modulus of deformation. The four mixes were cement and tailings; lead slag and tailings; cement, lead slag, and tailings; and cement, iron slag, and tailings. After various periods of additions curing, the specimens containing blast-furnace slag were retested up to three times. The objective of these tests was to quantify the benefits of adding slag to backfill mixes, measure strength gain or loss of retested specimens over time, and determine if slag can be substituted for cement without a loss in specimen strength. Results indicated that adding blast-furnace slag increased 28-day unconfined compressive strength for all mixes and modulus of deformation values for all but one mix. Some specimens exhibited increased strength and modulus values when they were retested at 356 days and again at 90 days after they were cast.
Keywords	Mines(Excavations) Backfilling Underground disposal Mineral wastes Slags Mine tailings Cements Waste minimization Lead ores Iron ores Binding agents Compressive strength Mechanical properties
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 68C - Solid Wastes Pollution & Control
Corporate Authors	Department of Energy, Spokane, WA. Spokane Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations/1996.
NTIS Issue Number	199708

Material Properties of Retested Specimens Composed of Tailings, Cement, and Blast-Furnace Slag.

Material Properties of Retested Specimens Composed of Tailings, Cement, and Blast-Furnace Slag.
PB97133276

Publication Date	1996
Personal Author	Tesarik, D. R.; Seymour, J. B.; Lane, W. L.
Page Count	24
Abstract	Four combinations of binder and cycloned tailings were cast into cylindrical specimen molds. The specimens were then tested in a servo-hydraulic loading frame to determine 28- and 90-day unconfined compressive strength and apparent modulus of deformation. The four mixes were cement and tailings; lead slag and tailings; cement, lead slag, and tailings; and cement, iron slag, and tailings. After various periods of additions curing, the specimens containing blast-furnace slag were retested up to three times. The objective of these tests was to quantify the benefits of adding slag to backfill mixes, measure strength gain or loss of retested specimens over time, and determine if slag can be substituted for cement without a loss in specimen strength. Results indicated that adding blast-furnace slag increased 28-day unconfined compressive strength for all mixes and modulus of deformation values for all but one mix. Some specimens exhibited increased strength and modulus values when they were retested at 356 days and again at 90 days after they were cast.
Keywords	Mines(Excavations) Backfilling Underground disposal Mineral wastes Slags Mine tailings Cements Waste minimization Lead ores Iron ores Binding agents Compressive strength Mechanical properties
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 68C - Solid Wastes Pollution & Control
Corporate Authors	Department of Energy, Spokane, WA. Spokane Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations/1996.
NTIS Issue Number	199708