Abstract
Durability is a prerequisite for satisfactory performance of concrete pavements in freeze-thaw environments. The Kansas Department of Transportation (KDOT) has been experiencing durability problems of limestone aggregates since the 1930s and, finally, has developed stringent specifications for concrete aggregates through a series of field and laboratory studies in the mid-1980s. Recently, pavements that potentially are nondurable because of contamination of limestone aggregates have been detected on three projects on 1-35 and US-50. These projects involved more than 500,000 yd2 of concrete pavement, worth approximately $10,000,000. The suspected contamination was first detected by a geological investigation on slices of cores and beam samples randomly taken from the project as well as on loose coarse aggregate samples larger than 4.75 mm (U.S. No. 4) sieve size. Freeze-thaw tests (ASTM C-666; Procedure B) on the cores and beams retrieved from these projects indicated that the samples with higher percentag...
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Schedule a callMore From: Transportation Research Record: Journal of the Transportation Research Board
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