Studying the effect of partial replacement of coarse aggregates in PCC by waste tire rubber aggregates in the case of rigid pavements

VW Engineering International, Volume: 4, Issue: 3, 96-103

Received: Nov. 14, 2022
Accepted: Nov. 28, 2022
Published online: Nov. 30, 2022

Zaffer Salam Padder ^1*, Vishal Yadav ¹, Pooja Sharma ¹

¹Department of Civil Engineering, Desh Bhagat University, Mandi Gobindgarh, Punjab 147301, India.

Abstract:  In this research work, our emphasis is laid on the employment of rubber tire aggregates( 5% min & 15% max) by partially replacing the coarser rock aggregates in plain cement concrete in the case of rigid pavements. To get the maximum possible outcome it is very much advised to treat the rubber tire aggregate surface with NaOH and cement paste, before using them with M20 concrete mix. Using untreated rubber it was noticed that the overall compressive strength of the concrete mix had a rapid dip but when treated rubber was employed the overall 28-day compressive strength of the mix showed more than a 90% increase, which is quite satisfactory, considering the availability of used tire rubber at ease and cheap rates furthermore its employment reducing the amount of hazardous threat it can pose to the environment. Such an amount of compressive strength is accepted as quite satisfactory for treated rubberized tires, e.g. in the case of floor construction and concrete pavements where the compressive strength is not of so much importance. It was found that the flexural and split tensile strength is higher than the normal concrete but only when the rubber was treated with NaOH and cement paste. However, the workability had a certain dip, flexibility shows awesome increment, and the resultant mix is lighter than the concrete mix because of the light weight of rubber particles. Such enhancement in the properties like compressive strength, split and flexural strength, lightweight, high impact, toughness resistance, etc. can be helpful in the employment of this concrete in various civil engineering works.

Keywords:  OPC (ordinary Portland cement) UTR (untreated rubber), CTR (cement treated test)  NTR (NAOH treated rubber) workability Test, slump value, flexural test, tensile split strength test, compressive strength