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  4. Stephen Hetherington

Stephen Hetherington HNC, BSc(Hons), PG Cert LTHE

Senior Lecturer in Building Surveying


Summary

I am a senior lecturer and module leader for materials. My role as senior lecturer requires me to design and deliver lectures and tutorials on modules in Conservation Studies, Materials; Science of Materials, Pathology and Domestic Construction Technology.

About

My core research interests are in service performance of construction materials namely their durability, repair and conservation. Recent external contract work has focused on the production of stone roofing slates and proprietary frost testing of historic masonry.

Teaching

I have a varied and interesting teaching portfolio being involved in the delivery of modules that require me to convey lectures and laboratory sessions on the production performance and use of a variety of materials used in the construction industry. I am particularly interested in the durability of construction products and how the incorrect use of combinations of materials can cause issues within the structure of buildings.

I also deliver lectures and tutorial sessions in Building Conservation, Building Pathology and Domestic Construction and Environment Technology.

Research

I have been involved in a variety of different research projects for some of the most well-known Building , conservation and research establishments in the UK including Hanson Brick , Blue Circle cement (now Lefarge ) English Heritage ,Oxford Brookes University and The Building Research Establishment .

A selection of some of the consultancy and research projects I have been involved in

A Comparative study into the performance of hot mixed and lime putty mortars with additions of metakaolin and brick dust pozzolans.

The Palace of Westminster Courtyards Project: Sourcing Stone for Repair and Conservation.

A comparative investigation into lime activated ground granulated blast furnace slag as a sustainable alternative to Portland cement in masonry mortars.

Comparative testing of hydraulic lime and OPC mortar mixes.

Laycock, E. A. & Hetherington, S. 2006 Testing of Stoke Rochford stone For Jefferson Consulting [Confidential]
Laycock, E. A. & Hetherington, S. 2005 Testing Horsham stone tiles Ambo Architects [Confidential]
Laycock, E. A. & Hetherington, S. 2005 Damp Towers Project. part 2 For English Heritage
Laycock, E. A. & Hetherington, S. 2004 Damp Towers Project. part 1For English Heritage
Laycock, E. A. & Hetherington, S. 2004 Evaluation testing of stone building materials for Jefferson consulting ltd [Confidential]
Laycock, E. A. & Hetherington, S. 2001. Truro Stone Testing 100 cycle summary. September 2001 For English Heritage and Dean and Chapter of Truro Cathedral
Laycock, E. A. & Hetherington, S. 2000 Comparison of two mortars. Reference: BC Report 1. January 2000 Blue Circle [Confidential]

A contract for Blue circle was undertaken at the end of November 1999 to compare two masonry cements in two designated mixes and report on their workability ,volume yield spotboard life and compressive strength. The work was carried out to BS4551 (1998) and BS 5224 (1995)

Laycock, E. A. & Hetherington, S Durability of Concrete Railway Sleepers BRE /Tarmac in November 1999 To Belgian standard NBN B 15-231 (1987) [Confidential]

(This contract for BRE in November 1999 on Tarmac railway sleeper had a tight deadline and involved the auditing of our test procedures and equipment by the BRE(DETR). The tests were carried out to a national Belgium standard NBN B 15-231 (1987) and reported to the satisfaction of all concerned.)

Publications

Journal articles

Laycock, E., David, J., & Hetherington, S. (2020). The Palace of Westminster Courtyards Project: Sourcing Stone for Repair and Conservation. XV International Conference on Durability of Building Materials and Components, 1649-1656. https://congress.cimne.com/dbmc2020/frontal/Doc/EbookDBMC2020.pdf

Hetherington, S., & Laycock, E. (2020). A Comparative study into the performance of hot mixed and lime putty mortars with additions of metakaolin and brick dust pozzolans. Journal of Building Survey, Appraisal and Valuation, 8 (4), 309-325. https://www.ingentaconnect.com/content/hsp/jbsav/2020/00000008/00000004/art00004

Laycock, E., Jefferson, D., Hetherington, S., Clegg, F., & Wood, C. (2017). Revitalising Collyweston limestone slate production by artificial freeze/thaw splitting. Construction and Building Materials, 159, 486-498. http://doi.org/10.1016/j.conbuildmat.2017.10.039

Hetherington, S. (2015). A comparative study into the tensile bond strength of the brick mortar interface of Naturally Hydraulic lime and Portland cement mortars. Masonry International, 28 (2), 67-64.

Hetherington, S. (2015). A Comparative study into the tensile bond strength of the brick mortar interface of natural hydraulic lime and Portland cement mortars. Masonry International, 28 (2), 37-43.

Hetherington, S. (2014). Comparative testing of hydraulic lime and OPC mortar mixes. Journal of Building Survey, Appraisal & Valuation, 3 (3), 274-281. http://henrystewart.metapress.com/link.asp?id=585166042m182352

Laycock, E.A., Spence, K., Jefferson, D.P., Hetherington, S., Martin, B., & Woods, C. (2008). Testing the durability of limestone for cathedral façade restoration. Environmental Geology, 56 (3-4), 521-528. http://link.springer.com/journal/254

Laycock, E.A., Spence, K., Jefferson, D.P., Hetherington, S., Martin, B., & Wood, C. (2008). Testing the durability of limestone for Cathedral façade restoration. Environmental Geology, 56 (3-4), 521-528. http://doi.org/10.1007/s00254-008-1333-x

Hetherington, S. (n.d.). A comparative investigation into lime activated ground granulated blast furnace slag as a sustainable alternative to Portland cement in masonry mortars. Masonry International, 30 (1). https://www.masonry.org.uk/downloads/a-comparative-investigation-into-lime-activated-ground-granulated-blast-furnace-slag-as-a-sustainable-alternative-to-portland-cement-in-masonry-mortars/?highlight=hetherington

Conference papers

Laycock, E., Jefferson, D., & Hetherington, S. (2020). The Palace of Westminster Courtyards Project: Sourcing stone for repair and conservation. In Serrat, C., Casas, J.R., & Gibert, V. (Eds.) The Palace of Westminster Courtyards Project: Sourcing Stone for Repair and Conservation, (pp. 1649-1656). CIMNE: https://congress.cimne.com/dbmc2020/frontal/Doc/EbookDBMC2020.pdf

Other activities

Consultancy projects

Research activities

Teaching Development

ABE (Association of Building Engineers)

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