American Society for Testing and Materials (ASTM). Current edition approved Aug. 10, 2002. Published October 2002. 5 p. This test method covers determination of (1) chord modulus of elasticity (Young’s) and (2) Poisson’s ratio of molded concrete cylinders and diamond-drilled concrete cores when under longitudinal compressive stress. Chord modulus of elasticity and Poisson’s ratio are defined in Terminology E6.