National Frost Project

National Frost Project in Finland aims to update concrete’s frost resistance requirements and testing practices as well as methods. The project is divided into a preliminary study and a main project, addressing current challenges in the field such as evolving mix compositions, variation in testing methods, and outdated requirements especially for salt freeze-thaw resistant concrete.

The preliminary study identified three promising test methods: the slab test, the Swiss Q-slab test, and the air void analysis. Comparison of requirements between countries revealed similarities in basic principles and requirement levels but differences in practices. For instance, Finland’s P-factor system for infrastructure concrete is unique, while other countries mainly specify requirements through water-to-binder ratio and air content.

The main project is planned to start in 2025 and will include an extensive testing program. The objective is to update frost resistance requirements for current and future concrete compositions, improve testing methods and quality control processes, and unify requirements for building and infrastructure construction.

Close collaboration between the concrete industry and research community is essential for the project’s success. Preparations will continue in autumn 2024, focusing on assessing laboratory capacities, identifying training needs, and mapping potential participants. The outcomes are expected to significantly influence quality control of concrete and requirement levels for frost resistant concrete in Finland.

Read the entire article in Finnish and see the images >>