Performance Assessment of Warm Mix Asphalt (WMA) Pavements : Executive Summary Report
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2009-09-01
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Edition:Executive summary report.
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Abstract:Warm Mix Asphalt (WMA) is a new technology which was
introduced in 1995 in Europe. WMA is gaining attention all
over the world because it offers several advantages over
conventional asphalt concrete mixes. The benefits include:
(1) Reduced energy consumption in asphalt mixture
production process; (2) Reduced emissions, fumes, and
undesirable odors; (3) More uniform coating of aggregate
with binder, which should reduce surface aging; and (4)
Extended construction season in temperate climates. WMA
requires the use of additives to reduce the temperature of
production and compaction of asphalt mixtures. WMA
technologies include: Aspha-min, the addition of sodium aluminum
silicate or zeolite to the asphalt mix; Sasobit, the addition of a paraffin-wax compound
extracted from coal gasification; Evotherm, the addition of an emulsion to improve
the coating and workability of WMA mixes.
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