Both the cylinder and cube compressive strengths of UHPdC are measured and compared. The reason of using two different shape of specimens are because in some bridge design code such as the Eurocode 2 (2004), Australian bridge design code Ð AS5100 (2004), the AASTHO-LRFD Bridge Design Specification (2006) using cylinder compressive strength as the design basis, whereas the British bridge design code, BS5400.4 (1990) is base on the characteristic compressive strength of cube specimen. The cylinder compressive strength (   ) was measured according to AS1012.9-1999 using cylinder specimens with 75 mm diameter and 150 mm height. The cube compressive strength (   ) was measured according to BS6319.2-1983 using cube specimen with dimension of 100 mm.