Characterisation & applications of trommel fines derived from recycling of construction, demolition & excavation waste
PhDs and postgraduate research
Self-funded PhD students only
School of Civil Engineering and Surveying
Applications accepted all year round
Applications are invited for a self-funded, 3-year full-time or 6-year part-time PhD project, to commence in October or February.
The United Kingdom, like other developed nations, is constantly improving its infrastructure, towns and cities. These activities generate a huge amount of construction, demolition and excavation (CD&E) waste. Recent government statistics identified that the UK produces around 200 million tonnes of waste per year, of which approximately 60% results from CD&E waste activities. Much of this waste is typically destined for landfills, but since the awareness of the negative impacts of landfilling on the environment, enforcement of European and national legislation, recycling and reuse of CD&E wastes is becoming inevitable. Other key factors such as the policies related to the disposal of CD&E waste need further development based on scientific evidence.
Waste recycling companies segregate CD&E waste to extract recyclates, but still, a large quantity of residual waste is landfilled. This includes a potentially useful smaller fraction of CD&E waste, known as trommel fines. This is the by-product of trommel screens that pre-treat CD&E waste prior to recycling and disposal. While the UK faces landfill shortage combined with economic and environmental issues, the large proportion of trommel fines add to the waste. This calls for a consideration of sustainable options that convert this waste material into a useful resource, easing the burden on landfills. The UK Government is continuing to impose taxes on CD&E waste fines based on the volatile organic content alone but this approach is not enough to divert waste from landfills.
The primary goal of the project is to conduct in-depth characterisation studies to improve the management of CD&E fines from material recovery facilities. This project will undertake fundamental research on CD&E waste recycling processes, which involves investigations into efficient and effective material separation techniques, development of a new breed of trommel fines based construction materials such as recycled concrete, paving blocks, soil-based building materials, identify various uses in roads construction, land reclamation and will explore applications within horticultural and agricultural sectors as a plant growth media. This project will also assess environmental issues such as leaching of toxic elements from fines, which is a key to achieve the end-of-waste status for such materials.
This study also plans to evaluate the current regularity policies on CD&E wastes and will recommend improvements by establishing testing protocols for fines. Moreover, this project will undertake a life cycle assessment (LCA) of fines using SimaPro (LCA software), to quantify environmental impacts associated with the production, use, and disposal of this material. The LCA will also examine the application of circular economy, calculations for carbon footprinting, embodied energy of trommel fines in civil engineering application and identify routes for sustainable reuse of CD&E waste fines.
Fees and funding
Funding availability: Self-funded PhD students only.
PhD full-time and part-time courses are eligible for the UK Government Doctoral Loan (UK and EU students only).
2021/2022 fees (applicable for October 2021 and February 2022 start)
PhD and MPhil
Home/EU/CI full-time students: £4,500 p/a**
Home/EU/CI part-time students: £2,250 p/a**
International full-time students: £17,600 p/a*
International part-time students: £8,800 p/a*
PhD by Publication
External candidates: £4,407*
Members of staff: £1,720
All fees are subject to annual increase. If you are an EU student starting a programme in 2021/22 please visit this page.
*This is the 2020/21 UK Research and Innovation (UKRI) maximum studentship fee; this fee will increase to the 2021/22 UKRI maximum studentship fee when UKRI announces this rate in Spring 2021.
Some PhD projects may include additional fees – known as bench fees – for equipment and other consumables, and these will be added to your standard tuition fee. Speak to the supervisory team during your interview about any additional fees you may have to pay. Please note, bench fees are not eligible for discounts and are non-refundable.
- You'll need a good first degree from an internationally recognised university (minimum upper second class or equivalent, depending on your chosen course) or a Master’s degree in Civil Engineering or a related area
- In exceptional cases, we may consider equivalent professional experience and/or Qualifications
- English language proficiency at a minimum of IELTS band 6.5 with no component score below 6.0
- The project requires a candidate with suitable honours degree (at least 2:1) in Civil and/or Environmental Engineering, Materials Science or a related subject with some experience of working with multi-discipline teams.
- A suitable MSc/MPhil/MEng Degree with a background in waste management is desirable.
- This project is suitable for both home/EU and or International students.
How to apply
We’d encourage you to contact Dr Muhammad Ali (email@example.com) to discuss your interest before you apply, quoting the project code ACES4510219.
When you're ready to apply, you can use our online application form and select ‘Architecture, Civil Engineering and Surveying’ as the subject area. Make sure you submit a personal statement, proof of your degrees and grades, details of two referees, proof of your English language proficiency and an up-to-date CV.
Our How to Apply page also offers further guidance on the PhD application process.