Explosive Spalling of Fire Exposed Resource Saving Concrete Structures

The paper describes briefly a new test facility, which has been developed within the project “Resource Saving Concrete Structures”, also called “Green Concrete” and some test results from the project. A full report is available from the home page of the Department of Civil Engineering Kristiansen, Hertz, Sørensen [1]. The main idea was to establish a test method by means of which it should be possible to assess whether a particular concrete has an increased risk of spalling compared to traditional concretes as defined in Hertz [2] and only using ordinary standard cylinders as test specimens. The method has been applied on the green concretes of the project and later also as a first indicator in other projects. The method appears to be a valuable tool for the first investigation of new concretes