Scientia Iranica

Scientia Iranica

Investigation of mechanical and durability properties of recycled aggregate concrete containing crumb rubber considering a new model of elastic modulus

Articles in Press

Document Type : Research Article

Authors
Mahroo Piri
Ali Akbar Shirzadi Javid
Ramin Momen
School of Civil Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Narmak, Tehran, Iran
10.24200/sci.2023.60833.7013
Abstract
Natural gravel and Sand are growing more and more expensive due to its scarcity. Therefore, replacing natural aggregates with recycled materials has been a concern of researchers. In this paper, crumb rubber was utilized to supersede a few of the aggregate in percentages of 5, 10, and 15 aggregate volume. In concrete containing 15% rubber crumbs, 10%silica fume, and 10%zeolite were used along with crumb rubber. The findings of this investigation indicated that concrete containing 15% crumb rubber causes the greatest decline in compressive strength. Comparative to control concrete, compressive strength was decreased by 35% at 28 days and 36% at 7 days by substituting 15% of crumb rubber with aggregate volume. Additionally, it was discovered that the compressive strength of concrete containing 15% rubber crumbs rised by 23% and 33% at 28 days, and 21% and 34% at 7 days, respectively, when the mixture was containing 10% zeolite and 10% silica fume. Also, the greatest recline in flexural strength, tensile strength, and modulus of elasticity was related to concrete containing 15% crumb rubber, which was improved by adding 10% pozzolan. Finally, an elastic modulus prediction model for this type of concrete (recycled aggregate concrete) is presented.
Keywords
Crumb rubber
Elastic modulus model
Silica fume
Zeolite
Mechanical properties
Concrete durability
Recycled aggregate concrete
Subjects
Scientia Iranica

Articles in Press, Accepted Manuscript
Available Online from 15 November 2023

  • Receive Date 23 July 2022
  • Revise Date 11 February 2023
  • Accept Date 15 November 2023