Investigation on Mechanical Properties of Recycled Concrete Containing Natural Zeolite

Fathola Sajedi, Hasan Jalilifar

In this study, the effect of various dosages of natural zeolite (NZ) on the mechanical properties of recycled coarse aggregates concrete (RC) was presented. The RC was prepared by using 0, 25, 50 and 100% coarse aggregate replacement and sourced from demolished concrete piles and building projects. Three dosages of NZ i.e. 10, 20 and 30% were replaced with cement.  Mechanical properties as compressive strength, splitting tensile strength, modulus of elasticity and ultrasonic pulse velocity were evaluated. The test results demonstrated that although compared with other NZ dosages, the use of 10% of NZ as a conservative dosage of NZ, lead to more mechanical properties, but a combination of 25% of RA replacement and 20% of NZ replacement can produce RC with mechanical properties close to RC made with 10 of NZ.