Hydraulic Properties of Surface Runoff on Ash-Mixed Concrete Pavementby Reza M. Khanbilvardi, City Univ of New York, NY, United States,
Shahriar Afshari, City Univ of New York, NY, United States,
Abstract: The disposal of incinerated sludge ash from wastewater treatment plants is becoming an increasingly difficult problem in highly populated cities. The feasibility of reusing sludge ash in concrete mixes was investigated. Experiments were conducted to analyze the rainfall runoff events on a laboratory scale concrete platform in which a portion of fine aggregates was replaced by sludge ash. Another platform with the same mix design and under a similar rainfall simulation, but without having sludge ash, was established to act as a control reference. The two platforms were subjected to various precipitation in terms of intensity and duration by a rainfall simulator system. Sufficient runoff data was gathered for both of the pavements. Attempts were made to correlate the sheet flow depth to the Manning's roughness by analyzing the gathered data. The computations are based on the kinematic wave approximation to the sheet flow equations.
Subject Headings: Ashes | Runoff | Sludge | Sheet flow | Wastewater treatment plants | Concrete | Pavements | Sheets
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