HIGH PERFORMANCE CONCRETE: fib-APPROACH TO CODIFICATION

摘要

From about 1990 substantial research has been carried out in the field of high strength concrete. Since high strength/high performance concretes offered attractive possibilities for applications, there was a need to extend existing codes to higher concrete strength classes. Extension proposals have been given for the CEB/FIP Model Code 1990 for concrete structures. Simultaneously areas of potential weakness have been traced. "High Strength Concrete" is not synonymous to "High Performance Concrete". High Performance Concrete can be any concrete with a particular favourable property. Examples of High Performance Concrete in a wider sense are Self Compacting Concrete, High Strength Fibre Concrete, Self Compacting Fibre Concrete, Concrete with High Fire Resistance and Ultra High Strength Concrete. In the paper a short survey is given about what has been reached in the field of codification and application up to now. Furthermore some new developments in High Performance Concrete are highlighted. It is discussed which demands should be imposed on future codes in order to be able to fully profit from the favourable properties of those improved concretes.