Gambin, Monique (2024) Impact of Pavement Material for Flood Resistance on Rural Roads. [USQ Project]
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Abstract
This dissertation analyses and develops the idea that there is a lack of understanding between which granular road base materials are best suited for the construction of rural flood-affected roads, in terms of quality and cost.
The Queensland road network is approximately 226,000 km long of which 80% can be classified as rural roads. A lack of road maintenance and upgrade services in rural areas ultimately results in a failing ti·anspo1i system, which leads to rising costs and significant financial impacts to the local economy and population. Specifically, insufficient road maintenance leads to reduced service delivery and decreased safety on the roads. Consequently, the impo1iance of maintenance needs to be recognized by government to ensure these issues can be avoided.
The ultimate goal for this project is to determine the most cost-effective way to repair and restore mral unsealed granular, flood affected roads when there is a sho1iage of quality materials. To determine the best option, various tests were conducted including testing road subgrade sti·ength using both Dynamic Cone Penet:I'ation (DCP) testing and California Bearing Ratio (CBR) testing. This testing took place on N01manton - Burketown Road in Carpentaria Shire, Queensland.
DCP testing yielded an average CBR value for existing poorer quality material along Normanton - Burketown Road of 36%. According to MRTS05 this would most likely be a Type 2.4 material. CBR test results from gravel of higher quality from Well's Quany yielded a CBR result of 1000/o. According to MRTS05 this would most likely be a Type 2.1 material.
For this specific example, it is predicted that flooding will occur each year on No1manton - Burketown Road, in which case the preferred option for this scenario is the Type 2.4 material. It has been dete1mined that the Type 2.1 material will not perform better under flooded/soaked conditions then the Type 2.4 material will, and due to the Type 2.4 material being cheaper and more easily accessible throughout the entire shire, this is ultimately the preferred option. With flooding of the road each year being extremely likely, it is proposed that the Type 2.4 material option will be required.
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| Item Type: | USQ Project |
|---|---|
| Item Status: | Live Archive |
| Faculty/School / Institute/Centre: | Current – Faculty of Health, Engineering and Sciences - School of Engineering (1 Jan 2022 -) |
| Supervisors: | Seligmann, Hannah |
| Qualification: | Bachelor of Engineering (Honours) (Civil) |
| Date Deposited: | 07 Oct 2025 05:31 |
| Last Modified: | 07 Oct 2025 05:31 |
| Uncontrolled Keywords: | Pavement; rural roads; flood resistant |
| URI: | https://sear.unisq.edu.au/id/eprint/53041 |
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