The effect of fibres on the properties of concrete with oil contaminated sand

Braden, Ashleigh (2015) The effect of fibres on the properties of concrete with oil contaminated sand. [USQ Project]


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The use of oil contaminated materials in construction applications such as concrete could result in a cleaner environment and a cost effective construction material. This research aimed at investigating the physical and mechanical properties of concrete with light crude oil contaminated sand. It focused on evaluating the effects of the addition of short fibres and determining the optimum dosage of short fibres that can enhance the physical and mechanical properties of concrete consisting of sand contaminated with light crude oil. In order to achieve the project objectives, the following experimental programmes were implemented:
1. Characterisation of the physical and mechanical properties of concrete using sand with different levels of oil contamination.
2. Evaluation of the compressive and flexural behaviour of crude oil-impacted sand in concrete with four types of short fibres.
3. Determination of the optimum dosage by volume through investigation of compressive and flexural behaviour.

The results of the experimental investigation showed that concrete density and compressive strength decreases with increased oil content. To maximise options for the use of oil contaminated materials, a maximum oil content of 10% by volume of sand was deemed suitable for use in concrete for construction applications.

The addition of 0.1% by concrete volume of Forta Ferro, polpropylene and ReoShore 45 fibres had an insignificant effect on the mechanical properties of concrete with 10% oil contamination, while steel fibres slightly enhanced the concrete compressive and flexural strength. Thus, it was selected as the best performing fibre.

The steel fibres in 10% oil contaminated concrete at dosages between 0.00115% - 0.5% by concrete volume (0.9 - 39.65 kg/m3) had minimal effect on oil-impacted concrete mechanical properties. The maximum fibre volume dosage of 0.5% most improved concrete flexural strength while causing minimal reduction to compressive strength.

From the results of this study, it was found that minimal recovery of concrete strength properties with 10% oil contaminated sand was made with the inclusion of fibres. This could be due to concrete saturation due to oil, which greatly affected its bond with fibres. Further investigations should be conducted to determine the maximum level of oil contamination that will not hinder the enhancement provided by short fibres on concrete properties to make this waste material applicable in building and construction.

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Item Type: USQ Project
Item Status: Live Archive
Additional Information: Bachelor of Civil Engineering (Honours) 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: Lokuge, Weena Manalo, Allan
Date Deposited: 31 May 2016 23:30
Last Modified: 05 Jun 2016 23:58
Uncontrolled Keywords: Oil Contaminated Sand, Fibres, Steel Fibres
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400502 Civil geotechnical engineering

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