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Abu-Shabeen, N N (2008) Development of multi-criteria decision analysis models for bidding and contractor selection, Unpublished PhD Thesis, School of the Built Environment, Edinburgh Napier University.
Alsulamy, S (2015) Developing a performance measurement framework for municipal construction projects in Saudi Arabia , Unpublished PhD Thesis, School of Engineering and the Built Environment, Edinburgh Napier University.
De Venny, A S (1999) Recycling of demolished masonry rubble, Unpublished PhD Thesis, School of the Built Environment, Edinburgh Napier University.
- Type: Thesis
- Keywords: masonry rubble; waste; coarse aggregate; materials management; recycling; demolition
- ISBN/ISSN:
- URL: http://researchrepository.napier.ac.uk/Output/6043
- Abstract:
The recycling of demolished masonry rubble as the coarse aggregate in new concrete represents an interesting possibility at a time when the cost of dumping such material is on the increase. With growing concerns over the environmental impact of aggregate extraction and the continued rise in aggregate demand in the UK, it is clear that the market is now there for recycled and secondary aggregates. The present investigation consists of experimental and theoretical studies into the effects of using recycled aggregates to produce concrete instead of virgin aggregates. The aggregates used have been recycled from construction and demolition waste. The recycled aggregates were predominately made up of crushed bricks but the aggregates did contain impurities such as timber and mortar. New bricks were crushed to form an aggregate in order to investigate the properties of brick as a material without impurities. The physical properties of the various aggregates were firstly examined and compared with granite aggregate, an aggregate proven in the production of good quality concrete. Concrete was then produced with the aggregates and all the physical and mechanical properties of the concretes were examined in some detail. The results showed that recycled masonry aggregates can be used successfully to produce· concrete of an acceptable standard. New test methods were presented in this investigation to determine brick porosity and water absorption. This involved the testing of broken brick fragments under vacuum, rather than the testing of whole brick units by 5hrs boiling or 24hrs submersion in cold water. The new test methods proved to be easy to perform and provided accurate results. A new test method for estimating the strength of bricks was presented. This involved point-loading of masonry specimens to obtain strength index values. From the pointload results, equations were presented relating the strength index values of brick fragments to the compressive strength of whole brick units. This involved the development of shape factors for different masonry specimens. The point-load test is easy to perform, presents a cheaper alternative to heavy compression machines and can be used on site to determine the suitability of recycled bricks as the aggregate in new concrete.
Delaney, F T (2003) Effectiveness of mergers and acquisitions and corporate financial performance in construction, Unpublished PhD Thesis, School of Built Environment, Edinburgh Napier University.
Elsayah, O S (2016) A framework for improvement of contractor selection procedures on major construction project in Libya, Unpublished PhD Thesis, School of Engineering and the Built Environment, Edinburgh Napier University.
Guo, Q L (2001) Development of risk analysis models for decision-making in project management, Unpublished PhD Thesis, School of the Built Environment, Edinburgh Napier University.
Hairstans, R (2007) Optimisation of timber platform frame construction, Unpublished PhD Thesis, School of Engineering and the Built Environment, Edinburgh Napier University.
Robinson, M J (2021) The delusion of innovations? An investigation into micro-level factors to an effective macro-level diffusion of Building Information Modelling in the UK, Unpublished PhD Thesis, , Edinburgh Napier University.
Sanna, F (2018) Timber modern methods of construction: a comparative study, Unpublished PhD Thesis, Institute for Sustainable Construction, Edinburgh Napier University.
Schrapers, M (2018) Applying standards, guidelines and methods in construction project management, Unpublished PhD Thesis, Business School, Edinburgh Napier University.
Tan, J (2021) The role of social media marketing in organisational business development in the construction industry: managerial perspectives, Unpublished PhD Thesis, , Edinburgh Napier University.
Taylor, M D (2003) Economic appraisal and risk analysis of construction automation, Unpublished PhD Thesis, School of the Built Environment, Edinburgh Napier University.
Tokede, O O (2016) Developing whole-life cost models for retrofit options in office buildings, Unpublished PhD Thesis, School of Engineering and the Built Environment, Edinburgh Napier University.