Paper Key : IRJ************952
Author: Challa Raghuram
Date Published: 03 Oct 2023
Abstract
Recycled concrete aggregates are made from building and demolition debris that is either disposed of in landfills or only sometimes utilized as filler. These aggregates are only used in a restricted number of applications due to drawbacks including excessive water absorption and permeability, poor compressive strength, etc. The mortar of the preceding concrete matrix that was bonded to it is what gives it these terrible qualities. With fresh mortar producing a weak inter-transitional zone, the old mortar fails to make a firm link. This study examines the improvement in recycled aggregate qualities when zeolite serves as a partial cement substitute. Due to the high silica concentration of zeolite, it combines with Ca(OH)2 to generate additional C-S-H gel, which reduces pores and increases the durability of concrete. Zeolite at a concentration of 5% has given compressive, and flexural strength approximately equal to Normal mix for 7 days. The strength qualities declined when zeolite was added more and more.