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Evaluation Of Nebraska’S Aggregate Reactivity By The Miniature Concrete Prism Test Method – Aashto T380, Lieska Halsey, Wally Heyen
Evaluation Of Nebraska’S Aggregate Reactivity By The Miniature Concrete Prism Test Method – Aashto T380, Lieska Halsey, Wally Heyen
Nebraska Department of Transportation: Research Reports
The evaluation of nine different aggregates shows the viability of the T380 test method as an alternative to the standard C1293 test method. The T380 assesses the Alkali-Silica Reaction potential of aggregates with the same reliability as C1293 and correlates well with the C1293 test method. Results are obtained within 56 days by T380 compared to 365 days required by C1293. The T380 method at 56 days appears to characterize the aggregate reactivity similarly to C1293 for all the aggregates evaluated in this study. Therefore, T380 will be part of the Department test method for approval of interground/blended cements along …
Effect Of Moisture Condition On Concrete Core Strengths, Wally Heyen, Lieska Halsey
Effect Of Moisture Condition On Concrete Core Strengths, Wally Heyen, Lieska Halsey
Nebraska Department of Transportation: Research Reports
The main purpose of this study was to determine if there would be any major differences between curing methods of cores taken for acceptance testing from a highway slab on a project. The comparison provided data to determine the effect of the moisture gradients created by these different curing treatments on core strength and core permeability. The strengths were measured of moist cured cores and sealed plastic bag cured cores from the day cores were obtained (14, 21 and 26 days) until they reached 28 days. Permeability was also measured at 26, 28 and 32 days. According to ASTM C42, …