UK: Hepworth Clay has achieved independent certification for its HepCem calcined clay, confirming conformity with BS 8615-1:2019 and A1:2026 for use as a pozzolanic material with Portland cement. The certification was awarded by Construction Products Certification (CPC) and applies to calcined clay manufactured at its Crow Edge manufacturing site in Sheffield. Hepworth said that HepCem gives cement and concrete producers a reliable, UK-manufactured alternative to clinker.
CEO Daniel Hannappel said "Achieving certification to BS 8615-1 is a significant milestone for HepCem and gives our customers independent assurance around both the product and the controls behind its manufacture. We have decades of experience working with clay materials and calcination, and HepCem allows us to apply that expertise to one of the most important challenges facing the construction industry: reducing the embodied carbon associated with cement and concrete.
The company said that it is now ready to work with cement and concrete producers that may be looking to evaluate calcined clay within lower-clinker cement formulations.