Digitized Honors Theses (2002-2017)

Date of Award

7-2014

Document Type

Undergraduate Thesis

Degree Name

BS

Department

Civil Engineering

Faculty Mentor

John Cleary

Abstract

Pervious concrete, a rapidly developing construction material, has become the focus of much research and investigation. This material is basically conventional concrete, just without the fine aggregate. The removal of fine aggregate from the mixture creates pores, allowing water to flow through the concrete. Applications for pervious concrete include parking pavement for parking lots, driveways, residential alleys, roads, sidewalks, pathways and edge drains. While it is a very effective construction material, its low strength and low resistance to freeze-thaw cycles has presented major concerns. This study was conducted to measure the effect of adding fine aggregate incrementally to a standard pervious concrete mixture in order to measure increases in strength.

A standard mixture was obtained and used as the control, while six other mixes were produced, each with a different fine aggregate content. Every other component of the mixture was held constant. Specimens from each mix were tested for compressive strength, splitting tensile strength, flexural strength and permeability. No apparent correlation was observed between added fine aggregate and increased compressive, splitting tensile, and flexural strengths. However, due to the incremental addition of fine aggregate, permeability decreased since the added fine aggregate clogged the pores of the pervious concrete mixture, making it less and less permeable. As a result, it was demonstrated that as the permeability of a sample decreased, the compressive strength increased, which was the expected trend.

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