Recycled rubber access cover riser

Browne, Michael Charles (2015) Recycled rubber access cover riser. [USQ Project]

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Abstract

The aim of this dissertation was to design an environmentally sustainable recycled rubber access cover riser (RAC) for raising existing stormwater and sewer access covers (AC) during asphalt overlays. This was achieved by performing a material analysis and detailed structural design of the RAC. The result was a cost effective RAC product design that satisfies the geometric criteria identified and also the structural design requirements using the von Mises yield criterion. The RAC supply and installation cost was calculated at $1,536.74 per maintenance hole (MH).

The RAC will be compatible with all existing AC diameters and will be manufactured in two (2) thicknesses. Also the RAC will meet the following design criteria, it must be a permanent product equalling the life of the asphalt wearing course; there must be a marked cost saving; the installation treatment must be non-destructive, quick and simple.

The RAC is a solid recycled rubber circular disk 1000.0 mm in diameter. It will be bolted and glued to the existing AC which will also provide structural support. The RAC and connection design will conform to Class D AS 3996 Access Covers and Grates.

KN Rubber’s Symar bearing pads were selected for modelling and possible development as they are geometrically adaptable and environmentally sustainable.

Modelling was performed in Strand7 using Mooney-Rivlin material theory and processing was performed using the nonlinear solver. The RAC design must above all, be safe and able to stand the loads prescribed in AS 3996 without yielding. The design model was tested through application of the von Mises yield criterion and critically the von Mises stresses for both RAC thicknesses were less than the material yield strength.

In conclusion the parameters outlined show it is reasonable to state that the RAC is a feasible product based on the design performance and cost estimate.


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Item Type: USQ Project
Item Status: Live Archive
Additional Information: Bachelor of Civil Engineering project
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Supervisors: Ghabraie, Kazem
Date Deposited: 31 May 2016 23:55
Last Modified: 05 Jun 2016 23:56
Uncontrolled Keywords: Rubber access cover riser (RAC), Asphalt overlays, recycled rubber
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering
URI: http://eprints.usq.edu.au/id/eprint/29179

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