Mark Tyrer - Consulting Geochemist
I have undertaken consultancy for around ten years, but since 2005, have been working in private practice for about half of my time. Some of this work is under direct contract to a client, or is undertaken through a partner, such as MIRO or ICON. I have acted on behalf of commercial clients in a range of technical and advisory capacities, including BP; Shell; Britannia Refined Metals; the Health and Safety Executive; Castle Cements; Tarmac Quarry Products Ltd, Tarmac Southern Ltd., The Minerals Industry Research Organisation, National Physical Laboratory and Westminster Abbey amongst others.


Most of my work is technical, arising from specific problems identified by a client and has included desk studies, such as reviews or thermodynamic calculations and more practical studies which have required site investigations or laboratory work. Occasionally, this has extended to preparation of expert witness evidence, prior to litigation.

The principal services I offer are thermodynamic simulations, document reviews, chemistry and microscopy in the following fields:
  • Thermodynamic simulation of near field processes
  • Cement chemistry, especially as it applies to waste management
  • Geomaterials, such as cement and concrete, engineered clays, aggregates etc.
  • Low-embodied energy construction materials
  • Novel sorbents derived from waste materials
  • Leaching studies of industrial by-products and wastes
  • Mineral processing technologies
  • Resource-efficient materials and materials re-use
I offer light microscopy as a routine service and have access to other techniques through commercial or academic laboratories. I would be happy to discuss sampling and specimen preparation by telephone.


1)    Computational Thermodynamics

I have taught computational thermodynamics as both post-graduate and undergraduate courses in several universities and to a commercial audience. This can be tailored to meet the needs of the trainees and can include tuition with the following codes:
All but the last code are in the public domain, so may be down-loaded in advance of a course, allowing web-based tuition to precede contact training. I work closely with the National Physical Laboratory and can provide training with MTDATA through NPL (My licence does not allow me to use it for commercial training!)

In addition, I have used ORCHESTRA, Geochemists Workbench, EQ3/6, Hydrogeochem, METSIM, Thermo-Calc and CHEMCAD and would be willing to discuss training requirements with any of these codes. If necessary, I also offer a "refresher" course on chemical thermodynamics. For the most part, I have taught on low temperature geochemical systems such as:
  • Grounwater- Rock interactions
  • Cement Chemistry
  • Clay Chemistry
  • Water and Waste Water chemistry
  • Acid Mine Drainage
The processes simulated are largely straight-forward ones, including:
  • Acid-Base Reactions
  • Precipitation-Dissolution Reactions
  • Redox processes
  • Surface Sorption and Desorption
  • Phase changes in 2 and 3 phase systems
  • Co-precipitation
  • Phase diagram construction
  • Invariant point calculations and model / data testing
  • Coupled chemical-transport modelling
  • Estimation of missing data
  • Uncertainty assessment and error propagation studies.

I would be happy to discuss specific requirements in other areas.

2)    Geomaterials

I have taught courses in geomaterials to many (and very varied!) audiences and am willing to tailor what began as an M.Sc. module to the requirements of an interested group. The topics are as follows:
  • Cement Chemistry (cement types, production, testing and standards)
  • Cement hydration (Chemistry and evolution of physical properties)
  • Aggregates ( Sources, types, processing, testing and standards
  • Clays (Chemistry and microstructure, properties of engineered clays)
  • Stone products (armour stone, dimension stone, alternatives to natural stone)
  • Concrete (Applications, types, production and emplacement, testing)
  • Durability of cement and concrete (Corrosion, carbonation, aggregaete reactions, sulphate attack, leaching, acid attack, leaching, fire and frost damage)
  • Plaster and other gypsum products (History, types, applications)
  • Low embodied energy materials
  • Ceramics in construction (Bricks, tiles and pipes)
  • Other construction materials (Glass, metals, timber, plaster and fibre board)
  • Analysis of geomaterials (Chemical and physical analysis and testing)
  • Resource efficiency in construction
  • Controlled low strength materials