Air-entrained concrete

Paper 1: A method was developed which makes it possible to determine the characteristics of the entrained air voids in concrete. Briefly, the procedure consisted of cutting and polishing a section of concrete to expose the distributed voids. Paper 2: The performance record is described of 14 concrete test roads in five northeastern states. Built 10 to 14 years ago with a wide range of variables, these roads provide an opportunity to compare the performance of air-entrained concrete with adjacent sections of the same construction but without air entrainment.