Abstract
Mechanical properties of extremely lean concrete were studied with uni-axitial compressive tests, splitting tests and tri-axial compressive tests. The following results were obtained. (1) Extremely lean concrete can be compacted properly as long as 20 seconds of VC value is sustained. (2) The strength of extremely lean concrete is determined by the law of cement-water ratio. (3) There is no big difference between the deformability of extremely lean concrete and conventional concrete in the tri-axial test under the same rate of the confine stress to the uni-axial compressive strength.
