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| Research Domain： |
Cement Chemistry |
| Keyword： |
Donald E. Macphee |
| Research Production： |
Portland cement has many uses but it is best known as the binding constituent of concrete, the most extensively used man-made construction material in the modern world. Although considered largely an engineering material, its setting and subsequent durability properties are controlled by chemistry. Consequently, cement chemistry research, over many years, has lead to a range of technologically significant products and processes. For example:
Cement formulations appropriate for extreme environmental conditions are used routinely in mine stabilisation, oil well cementing, underwater construction, cold weather climates, etc. · Durable concretes can be designed to limit degradation that previously would have arisen due to reinforcement corrosion, alkali aggregate reaction and sulphate attack. · High performance concretes can be formulated to enable the fabrication of high strength support columns for multi storey construction. · Mechanical properties (e.g. tensile strength and toughness) of mortars and concretes can be modified by mix composition. · The physical and chemical properties of cements can now be optimised for the immobilisation of hazardous waste.
The Cements Research Group at Aberdeen University Department of Chemistry have research activity over a broad range of areas. Dr Macphee is currently involved in several areas:
*characterisation of cement systems using ac impedance spectroscopy. This is a rapidly developing area of research with the technique having potential for application as a non-destructive test of the integrity of concrete structures
*toughening of cement systems. Two parallel studies are currently underway.
*the use of glass fibres as reinforcement.
*development of internal residual stresses.
*characterisation of high performance cements. Pore Reduced Cements (PRC) are derived from a process in which immature cement pastes mixed at normal water/cement (w/s) ratios are pressed (to 200 MPa) in a pore fluid squeezer. The resulting compaction and reduction in w/s produces a dense cement product with considerably improved mechanical properties and durability. Scanning electron microscopy coupled with image analysis follows a range of other techniques used in the characterisation of these materials.
*development of clay-based absorbers for the treatment of industrial waste waters.
Research Page:http://www.abdn.ac.uk/chemistry/research/dem/dem.hti |
| Remarks： |
Room O19
Tel. 01224 272941
Email d.e.macphee@abdn.ac.uk
Aberdeen University |
| Original file： |
No File
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