This guide presents general methods for selecting mixture proportions forhigh-strength concrete and optimizing these mixture proportions on thebasis of trial batches. The methods are limited to high-strength concrete containing portland cement and fly ash, silica fume, or slag cement(formerly referenced as ground-granulated blast-furnace slag) andproduced using conventional materials and production techniques.Recommendations and tables are based on current practice and infor-mation provided by contractors, concrete suppliers, and engineers whohave been involved in projects dealing with high-strength concrete.