Potential of rubber aggregates to modify properties of cement based-mortars: Improvement in cracking shrinkage resistance

摘要: Abstract Cement-based materials suffer from their low tensile strength and poor strain capacity: they are sensitive to cracking, above all shrinkage cracking. Enhancing the cracking resistance of cementitious is objective a broad ongoing research programme. In this regard, aim work design composite exhibiting high capacity before localised It was assumed that use aggregates with elastic modulus could be solution. Rubber obtained shredded non-reusable tyres were used, conferring an additional environmental interest on study. As expected, results show rubberised mortars exhibit lower elasticity have higher for deformation macrocrack formation. However, there one drawback: decrease in cement-based material accompanied by its strength. Results also confirm rubber aggregate incorporation increases length change due shrinkage. contrast, ring-test demonstrate enhancement provided largely offsets changes: delayed and, when it occurs, crack network exhibits thin openings which less detrimental.