J.A. TINKER University of Leeds

Concrete blocks incorporating lightweight aggregates are well known for their loadbearing and thermal insulating properties. Mix proportions are often changed to maintain or alter block strength properties with little attention being paid to the changes such modifications may have on the insulating properties. Using three lightweight aggregates, the effects of mix proportioning on the thermal conductivity and equilibrium moisture content of lightweight aggregate concretes were investigated. Aggregate type and mix proportions significantly affect the thermal conductivity whilst the cement content influences the equilibrium air-dry moisture content.