A.J. BELL1, A.M. AL-JOLAHY2 and M. KULAIB2 1Manchester Centre for Civil and Construction Engineering, UMIST, Manchester, UK 2Department of Civil Engineering, Sana’a University, Yemen

Compression tests have been carried out on two types of natural stone masonry, volcanic Tuffstone, a soft rock, and fine grained Limestone, a harder rock. Stone units were tested under compression in both dry and wet conditions and masonry was tested in the form of wallettes of single and double-leaf construction. Compressive strengths and stress-strain properties of the masonry were determined and modes of failure were identified. Comparisons are made between the experimental results and the provisions of ENV 1996-1-1 (Eurocode 6).