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
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:
Brian Hawkins (HM Geotechnics) and Tom St John (University of Bristol) have published a paper on the presence of sulfur-species in glacial tills (boulder clays) and the implications for engineering and construction. The authors consider a case study of road construction (A10) in an area underlain by glacial till in Hertfordshire, UK.
The paper, titled “Engineering significance of sulfur/sulfate in glacial tills” follows prior discussion of the A10 case study by Hawkins (2013):
Hawkins, A.B. (2013). Some engineering geological effects of drought: examples from the UK. Bulletin of Engineering Geology and the Environment.… 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.
The Pyrite Resolution Board (PRB) has produced six 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.
Homebond’s repudiation of purchasers’ claims – was it lawful?
Joseph Tyrrell (FCII, FCILA, FUEDI-ELAE), an insurance claims expert from Dublin, has published an extensive report on HomeBond’s repudiation of purchasers’ claims under the Major Defects Warranty in the HomeBond Agreement for Damage by Pyritic Heave.
report executive summary
In the report summary, Joseph Tyrrell writes:
“Following a wide-ranging investigation, I am satisfied that HomeBond’s rejection of hundreds of its warranty-holders’ claims was invalid, for reasons which I have examined in detail in the main body of this report…”
“It is astonishing, to my mind, that no one in authority appears to have looked closely at the reasons given for wrongfully turning down so many Purchasers’ claims, but it seems that this is what happened and that HomeBond has thus far got away with its shameful behaviour.
“BS 5930:2015 deals with the investigation of sites in order to assess their suitability for construction and to identify the characteristics of a site that affect the design and construction of the project. It also considers related issues including the environment and the security of adjacent land and property.”
“This is a full revision of the standard and introduces some principal changes…” [including] “…Compliance with BS EN 1997-1 and BS EN 1997-2 and related test standards…” [and] “…New information on geophysical surveying and ground testing and updated guidance on desk studies, field reconnaissance, ground investigations on contaminated ground and ground affected by voids.”
Guidance on sulfur-species
BS 5930:2015 provides considerable additional guidance on the presence and assessment of sulfur-species in geological materials compared to the 1999 version.… Read the rest