Paving with a pollution-abating activity and a photocatalytic mixture for its preparation
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United States of America Patent
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Sep 22, 2015
Grant Date -
Feb 24, 2011
app pub date -
Apr 28, 2009
filing date -
Apr 29, 2008
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Abstract
A new photocatalytic composition is described that is designed for percolation in road surfaces. The composition contains no aggregates, but consists of cement, a photocatalyst, a superfluidifier, a viscosity modifier and an antifoaming agent, in suitable proportions. The composition is applied to porous open-graded asphalt courses, completely filling the cavities down to a thickness coming between 30 and 50 mm. The treated asphalt acquires a strong, durable photocatalytic activity, even when it is submitted to heavy mechanical loads and adverse weather conditions, as in the case of road surfaces in and out of town, liable to intense traffic.
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