Development of a sustainable footpath material using recycled road profile, natural soils and PolyCom stabilising aid

Jackson, Scott (2016) Development of a sustainable footpath material using recycled road profile, natural soils and PolyCom stabilising aid. [USQ Project]

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Recycling and sustainability is a key element that needs to be addressed in modern day construction, to ensure the preservation of resources for future generations. The Ipswich City Council currently removes road profile and stores it for future use; and have only recently begun considering, researching and testing possible uses for it. This project aims to investigate the feasibility of using a material that is 99.998% -100% recycled, and is also suitable for use for pedestrian thoroughfare. Current research pertaining to road profile use has indicated that it requires improvement, thus the natural soils found within the Ipswich region and PolyCom Stabilising Aid will be utilised in an attempt to provide the stabilisation that the road profile might require. Laboratory testing of four different soils and road profile with and without PolyCom will occur. Different mix proportions of the four common soils of the Ipswich region and road profile will be tested, and the optimal mix proportion will be tested with and without the addition of the PolyCom Stabilising agent in California Bearing Ratio (CBR), Unconfined Compressive Strength (UCS) and Slip Resistance tests.

The successful application of this project will provide many benefits to Councils and thoroughfare construction industries by providing a more sustainable material that is cheaper than traditional reinforced concrete. Furthermore, this material may be an alternative for concrete in rural areas, and may also act well to provide thoroughfare in emergency situations, as it does not require curing like other materials.

Testing has indicated that the Road Profile does indeed benefit from the addition of soil, especially in samples that feature mix proportions of 25% Road Profile to 75% soil, and even 50% Road Profile to 50% soil. These samples demonstrate improved stabilisation when compared to samples of 100% Road Profile, and improved strength when compared to 100% soil samples. Optimal mixtures of road profile and soil samples reached CBR ratings of 70% - 80%.

When added with PolyCom Stabilising Aid, the Road Profile and soil mixtures did not perform very well in soaked CBR tests, revealing that in wet conditions, the PolyCom Stabiliser does not work well with the given materials. However, when tested in dry conditions in the Unconfined Compressive Strength tests, strengths of 1.82 MPa to 2.37 MPa were achieved by the Road Profile, Soil and PolyCom mixtures.

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Item Type: USQ Project
Item Status: Live Archive
Additional Information: Bachelor of Engineering (Honours) Major Civil Engineering project
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 - 31 Dec 2021)
Supervisors: Wahalathantri, Buddhi; Zhuge, Yan
Date Deposited: 20 Jul 2017 04:38
Last Modified: 20 Jul 2017 04:38
Uncontrolled Keywords: sustainable footpath; recycled road profile; natural soils; PolyCom stabilising aid
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400505 Construction materials

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