Fred Shrimer (Golder Associates, Vancouver, Canada) has published a paper on the geomechanics of heave due to pyrite oxidation.
The paper, titled “Geomechanics of heave due the use of pyritic mudstone, Ireland” follows previous presentations and publications by Shrimer:
Shrimer, F.H., and Briggs, A. (2014). Pyritic heave in Ireland: A case study in selection. Paper presented at the 67th Canadian Geotechnical Conference (GeoRegina 2014). Saskatchewan, Canada, September 28th-October 1st 2014. Link to full paper PDF (permission granted by Fred Shrimer to upload PDF).
Shrimer, F.H., and Bromley, A.V. (2012). Pyritic heave in Ireland: The role of petrography.… Read the rest
“Bore samples taken two years ago for this project did not initially reveal a pyrite problem, but recent borings did show it in various places along the entire project area, which runs from where the last phase ended at Little Egypt Road to Oakridge Road.”
In July 2014, PyriteProblem.com reported on how engineers from the Pennsylvania Department of Transportation (PennDOT) were attempting to determine how much pyrite was present and how to mitigate the problem.… Read the rest
Dr Brian Hawkins, a former Reader in Engineering Geology at the University of Bristol and independent consultant engineering geologist, passed away in January 2016. A remembrance article for Dr Hawkins can be found at the University of Bristol news pages (here).
Research into the engineering implications of pyrite oxidation and sulfur-species
Since at least the 1980s, Dr Hawkins was involved with the examination of, and research into, cases of pyrite heave. He published two books and over 20 papers on the topic of pyrite oxidation and sulfur-species in geological materials.… Read the rest
The Pyrite Resolution Board (PRB) has produced eight reports since the Pyrite Remediation Scheme was introduced in February 2014. Further statistics are provided on the PRB website and in recent news articles. See statistics below and follow links for original data.
The Advocate General of the European Court of Justice, Campos Sanchez-Bordona has delivered an opinion on Case C-613/14 (James Elliott Construction Ltd v Irish Asphalt Ltd). The Opinion was given in response to the request for a preliminary ruling from the Supreme Court of Ireland. The Opinion was delivered on 28/01/2016. The full text of the Opinion and the conclusions can be read by clicking here.
George Matheson (Matrock Consulting) and Paul Quigley (Irish Geotechnical Services Ltd) have published a paper on the petrological examination and assessment of aggregates that have undergone pyrite-induced swelling.
The paper, titled “Evaluating pyrite-induced swelling in Dublin mudrocks” follows previous presentations and publications by the Matheson:
Matheson, G.D, and Jones, G.L.I. (2015). The habit and form of gypsum crystals in Irish mudstone aggregate affected by pyrite-induced swelling. Quarterly Journal of Engineering Geology and Hydrogeology. 48, 167-174. Click here to read a summary of the paper.
Matheson, G. (2012). Pyrite-induced swelling. Annual Guest Lecture given to the Geotechnical Society of Ireland.… Read the rest
George Matheson (Matrock Consulting) and Gareth Jones (Conodate Geology) have published a paper on the mineralogy of gypsum in aggregates that have undergone pyrite heave. The authors used advanced petrography to examine the form of gypsum and its relation to forceful or passive growth with regards to aggregate expansion.
The paper, titled “The habit and form of gypsum crystals in Irish mudstone aggregate affected by pyrite-induced swelling” follows previous presentations by Matheson, e.g., in December 2012:
Czerewko and Cross (AECOM) have published a paper on the use of a granular construction interface to separate road pavements from underlying pyritic subgrade. The authors consider case studies and the implications for road construction where such an interface has and has not been used.
The paper, titled “Benefits of a granular construction interface in highway construction over pyritic subgrades for mitigating against deleterious ground effects” follows a prior case history publication by M. Czerewko on the construction of the A46, whereby pyritic subgrade extended over much of the road scheme:
Czerewko, M.A., Cross, S.A., Dimelow, P.G., and Saadvandi, A.… Read the rest
Taylor, Cripps and Clarke (University of Sheffield) have published a paper on the identification of pyrite induced heave using chemical and structural assessments. The authors consider the use of chemical and structural assessments to determine whether pyritic heave caused structural damage in a number of case studies.
The paper, titled “The identification of pyrite induced foundation heave by chemical and structural assessments” follows prior research on the in-situ investigation of pyritic fill by the authors:
Taylor, A.J., Cripps, J.C., and Clarke, S.D. (2015). The effect of temperature and moisture content on the behaviour of pyritic fill: development of an in situ monitoring system.… Read the rest
Mourice Czerewko (AECOM) and John Cripps (University of Sheffield) have published a paper on the investigation of pyrite heave affecting properties in Dublin, Ireland. The authors report on a case study from north Dublin, where pyrite bearing fill had been used below the new-build property floor slabs.
“Although structural damage caused by the expansion of bedrock and fills due to the presence of pyrite has been documented internationally since the 1960s, there is an apparent lack of awareness of the potential for these problems in the construction industry, particularly the domestic housing sector.