Abstract
The aim of this study is to analyze the effect of an environmentally friendly tire rubber content on mechanical and porosity a high-early strength (HES) cement mortar. These results were also associated with two distinctive porous morphologies (spheroidal and irregular). Specimens were produced using recycled tire waste rubber, which is constituted by a mixture between spheroid and fiber-like rubber particles. The use of a recycled rubber into a HES is scarce/absent in literature. A percentage of 30wt% of the fine tire rubber replaces the natural sand as fine aggregate. The experimental results after 7days show the compressive and tensile flexure strengths, water absorption and porosity. It is found that the rubber addition both the compressive and flexural strengths have considerably decreased. Both the control and rubberized mortars revealed irregular and spheroidal pores associated with gel/space ratio and air entrapped, respectively. An ettringite structure associated with gel/space ratio in a control mortar is observed. Distinctive engineering applications can be used for the rubberized mortar considering environmental, economical and lightweight aspects.
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