Project 3: Evaluation of laboratory test methods for carbonation, chloride, freeze/thaw salt and acid resistance.

Project duration: January 2021 to June 2023

Research objective: The main objective of the project is to ensure the transferability of laboratory results from tests of durability-relevant chloride penetration, carbonation, freeze-thaw, freeze-thaw and acid resistance to construction practice. Only in this way can both the acceptance of the use of established cements with reduced clinker content or of additives, which makes sense from an ecological point of view, be increased and the development of new cements with reduced clinker content and thus reduced CO2 emissions be made possible, with which durable concretes can be produced in a resource-conserving manner. The project will also make a significant contribution to concrete standardization, which envisages a shift to a performance concept.

Approach: The project is part of a joint project coordinated by the DAfStb. In 7 work packages, 4 very different commercial cements, a new CEM II/C cement and a fly ash are used for the production of a wide variety of concretes. The starting materials are selected in close consultation with the other 4 projects of the joint project. The influences of the pre-storage of the concretes and the time-rapid test boundary conditions on the results obtained with established test methods are determined, statistically evaluated and compared with practical experience.

Key publications