United States Department of Transportation
i
The effects of combined supplementary cementitious materials on physical properties of Kansas concrete pavements : [technical summary].
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2013-12-01
[PDF-272.43 KB]
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Abstract:The Kansas Department of Transportation (KDOT) has controlled harmful alkali-silica reactions (ASR)
through testing and selective use of sand and gravel aggregates for more than 70 years. ASR can also be
controlled through the addition of a non-reactive coarse aggregate “sweetener” and by the judicious use
of selected supplementary cementitious materials. Current KDOT specifications allow the use of sands
and gravels that may otherwise undergo ASR with the addition of a “sweetener” aggregate. Using one or
more supplementary cementitious materials (SCMs) in a concrete may accelerate or hinder alkali-silica
reactions, depending on the alkali and silica contents of the SCM and the aggregates used. Class C fly ash
may aggravate ASR and until 2009 was not approved for use in Kansas pavements.
The purpose of this project is to evaluate the effect of combining portland cement with Class C fly ash and
slag cement on the physical properties, alkali-silica reactivity (ASR), and durability of concrete containing
reactive fine aggregate and limestone coarse aggregate.
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