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Abstract:
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Although pervious concrete was first used in the nineteenth century, it has only recently
begun to increase in popularity. As urban areas expand, the problems associated with runoff
management have become more challenging. The focus on the negative environmental
effects associated with pavement runoff has also increased. These two issues have spurred
the recent interest in pervious concrete pavements.Pervious concrete, however, has
deficiencies which limit its application as pavements. These limitations include low
compressive strength, flexural strength, clogging, and other durability issues. The overall
purpose of this project was to provide tools to evaluate and improve the durability and
strength of pervious concrete such that it may be more confidently employed in urban
roadways. The specific objectives of this project were to
(a) investigate the effect of mixture design on strength of pervious concrete (including
the effect of fibers),
(b) evaluate effect of clogging materials on coefficient of permeability,
(c) and investigate the use of the dynamic pressurization test to evaluate the durability
of pervious concrete, (d) develop a simple model for predicting removal of clogging particles from pervious
concrete pavement surface pores.
This thesis documents the results of the laboratory testing, and presents recommendations for
mixture proportioning. In addition, recommendations are provided for optimizing the balance
between compressive strength and permeability. |
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