Integrated Sulphation Removal and Mineral Matrix Consolidation for Pollution Induced Stone Deterioration

Historic stone buildings suffer continuous deterioration from environmental pollution, acidic rain, and changing weather, exacerbated by climate change. Sulphation, forming black crusts, damages limestone fabrics, but current conservation methods are invasive and lengthy without effectively preventing further decay. This project aims to create integrated, non-invasive treatments to both remove sulphation and protect the stone, filling a key gap in built heritage conservation. Develop and characterise novel stone conservation treatments using analytical techniques. Test and compare these treatments on historical limestone blocks from project partners in laboratory settings. Assess treatment durability via accelerated weathering tests. Apply treatments onsite at Canterbury and Gloucester Cathedrals, evaluating their performance with non-destructive methods. Finally, disseminate research findings and prepare treatments for commercialisation. Smarter and more effective sulphation removal treatments to preserve historic limestone. Validated, non-invasive preservation techniques tested on real heritage sites. Enhanced reputation for Sheffield Hallam University in heritage conservation research. This project addresses urgent conservation challenges in protecting iconic historic stone buildings worldwide. By delivering innovative solutions to remove damaging black crusts while consolidating and safeguarding the stone fabric against pollution and weathering, it promotes sustainable heritage preservation amid environmental changes.

Applicants should hold at least a 1st or 2:1 Honours degree in built heritage conservation, materials science and engineering, or a related discipline. Non-native English speakers must provide IELTS 7.0 (minimum 6.5 in all components) or equivalent, taken within the last two years. Applications are strongly encouraged from underrepresented groups including women, LGBTQ+, and minoritised ethnic communities.

Submit via Sheffield Hallam University's online application form (PHD Materials Science and Engineering Full-time 2025). Upload the following:
(1) a personal statement (max 2 pages) detailing your interest and relevant experience;
(2) two letters of reference (at least one academic, both dated within the last 2 years);
(3) copy of your highest degree certificate;
(4) non-UK applicants must also submit IELTS results (taken within the last 2 years) and a copy of their passport. If applying to multiple GTA projects, list all in your application and submit a tailored personal statement for each. Application deadline: 07 May 2026. Interviews: TBC.