Conclusion

The results presented in this dossier show that the incorporation of rubber granulates from shredded used tires into a mortar confers on the composite a gain in deformation capacity before localization of the macrocrack with, on the other hand, a significant drop in compressive strengths. They also show that the beneficial effects of incorporating rubber aggregates and fiber reinforcement can be combined to limit composite brittleness. Ring shrinkage tests show that the effects of the composite's improved deformability outweigh those of dimensional variations in shrinkage. As a result, cementitious composite incorporating rubber aggregates has greater resistance to shrinkage cracking than so-called traditional mortars, and compared with simple fiber reinforcement, the combination of rubber aggregates and fibers proves to be a promising alternative. Cementitious composites doped with rubber...