Title:
Experimental Analysis of Cement Mortar with Varying Replacement Levels of Crumb Rubber
Author(s):
Rumman
Publication:
Web Session
Volume:
ws_F21_Rumman.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
10/17/2021
Abstract:
Disposal of the huge amount of rubber waste produced every year by the tire industry is a big concern. However, crumb rubber has an immense potential to be used in civil works, though mostly in non‐structural forms. Crumb rubber can also be used in concrete as a replacement for fine aggregate. Since there is no available guideline on the usage of rubber crumbs in concrete, its use is still limited. Moreover, contrasting results on fresh, mechanical and durability properties of rubber crumb replaced concrete are observed in previous studies. These inconsistencies give rise to the necessity of conducting studies on crumb rubber as a constituent in concrete. In this study, mortar samples were prepared with a water to cement ratio of 0.49 having crumb rubber replacement levels of 0, 10, 30, and 50% of sand particles in two different batches with cement to sand ratio of 1: 2.5, and 1: 3.0. Fresh and hardened properties of the mortar samples were observed through various tests and their failure pattern was investigated. The results indicated crumb rubber addition decreased the overall compressive strength of the mortar specimens, reduced their workability, and delayed the initial and final setting time. However, failure was more ductile and gradual with the increasing percentage of crumb rubber in mortar samples.