A full-scale revolution is being spearheaded from the Portland Cement Association's Research and Development Center in Skokie, Illinois, on its tenth birthday- a revolution in concrete that affects everyone connected with the concrete industries, including the men who build with this versatile material. Some of the most important contributions are: (1) high strength steel, (2) improved methods of concrete design, including ultimate strength and limit design, (3) knowledge of the characteristics of lightweight aggregates and lightweight concrete, (4) new sense of coordination of materials, (5) growth of quality control in materials, and (6) general acceptance of new developments in air entrained concrete. What do all of these accomplishments add up to? On the basis of the evidence available at Skokie and many discussions with scientists and technicians there, five guideposts seem to point quite clearly the direction in which concrete construction will travel in the years ahead. (1) The great burgeoning increase in the use of concrete will be in the structural field. Spectacularly expanding use of structural concrete as a result of revolutionary new design concepts making concrete lighter, stronger and more economical, may outstrip what even its most optimistic advocates predict. (2) Almost every element of the concrete industries stands of benefit by the resurgence of structural concrete. (3) Concrete highways will increase somewhat in the absolute, but not necessarily in relation to other materials in the total amount of new highways constructed. (4) Concrete paving can be expected to expand in other fields- particularly airport runways. Lastly, (5) the keynote of the future is quality. More and more, concrete will become an exact material, made by exacting engineering methods.