2019 CSCE Annual Conference - Laval (Greater Montreal) Conference
Dr. Ahmed Soliman, Concordia University
Dr. Michelle Nokken, Concordia University
The application of crumb rubber from recycled tires has been used in construction as a replacement for the aggregate and fine sand in concrete. The use of these materials can improve the concrete performance and may enhance its properties along with minimizing the cost. This paper investigates the effect of 10% replacement of sand with fine crumb rubber on properties of concrete mixtures with and without silica fume. Compressive and tensile strengths, surface resistivity, and rapid chloride penetration tests were conducted. Results showed that the use of rubber without silica fume decreases the mechanical properties compared to the plain concrete, while it enhances concrete modulus. In addition, rubber had a marginal effect on the relationship between concrete mechanical properties and electric resistivity. Moreover, the rubber with silica fume had a significant effect on the electrical conductivity.