The construction industry is subject to extensive norms and standards to guarantee the fire safety of both existing and new structures. Structural fire testing and analysis of full-scale structural elements and assemblages based on non-traditional or newly developed materials is essential in order to validate emerging construction and retrofitting technologies and to increase their market acceptance. This ESR project will provide a fundamental understanding of the behaviour of: (1) steel-reinforced AAM concrete and AAM FRHPC structural elements and (2) RC and masonry elements strengthened with AAM-TRM, under simulated fire conditions. To achieve this, the following objectives are defined:
|Tuning the mix design of different types of AAM (plain, fiber-reinforced, or combined with textiles) for fire resistance taking into account both theoretical predictions (e.g. based on the FactSage thermochemical software) and experimental results (derived from small-scale tests designed to assess material properties under elevated temperatures).
|Perform medium-scale indicative fire resistance testing on unloaded: (a) beam-/slab-type and column-/wall-type specimens of type (1) and (b) slab-/wall-type specimens of type (2).
|Optimize the mix design of the different AAM types based on the results of indicative fire resistance tests.
|Perform large-scale fire resistance testing on load-bearing: (a) slabs and walls of type (1), (b) RC slabs and columns furnished with AAM-TRM overlays and jackets, respectively and (c) masonry walls strengthened with AAM-TRM overlays. Cases (b) & (c) will be similar to elements tested by ESR6.
Develop analytical models to describe the structural behaviour of elements tested as above under fire.
|Understanding the effect of mix design and curing regimes on the material properties of different types of AAMs under elevated temperatures;
|producing guidelines for the production of fire resistant AAMs depending on the intended use;
|filling the knowledge gap related to the fire resistance of load-bearing structural elements made of or incorporating AAMs;
|providing guidelines for the fire protection systems needed for AAM- based structures;
|examining the adequacy of contemporary fire engineering design procedures applicable to conventional RC structures for AAM-based ones;
|providing an analytical tool for the simulation of the response of selected structural elements under fire.