Performance Evaluation of Bituminous Concrete Mixes Modified with SBS Polymer and Warm mix Additive
Harpreet Singh1, Tanuj Chopra2, Sahil Kamotra3, Sambhav Jain4, Amandeep Kaur5

1Harpreet Singh, Research Associate, Ministry of Road Transport & Highway- IIT Roorkee, Delhi, India.
2Tanuj Chopra, Associate Professor, Civil Engineering Department, Thapar University, Patiala, India.
3Sahil Kamotra, Assistant Professor, Himalyan Institute of Technology (H.P), India.
4Sambhav Jain, Assistant Professor, Amity University Haryana, India.
5Amandeep Kaur, Military Engineering Service, Leh, India. 

Manuscript received on 9 August 2019. | Revised Manuscript received on 18 August 2019. | Manuscript published on 30 September 2019. | PP: 441-450 | Volume-8 Issue-3 September 2019 | Retrieval Number: C4219098319/19©BEIESP | DOI: 10.35940/ijrte.C4219.098319
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Abstract: The main objective of this study was to investigate the effect of SBS polymer and warm mix additive on the performance of bituminous concrete mixes. SBS polymer dosage was kept 3%, 5% and 7% and Zycotherm additive dosage was kept 0.1% for all binder mixes. Comparisons were made between Base bitumen, SBS modified bitumen and Zycotherm modified bitumen. For preparation of bituminous mixes, two different types of aggregates were used in this study i.e. Limestone and riverbed aggregate. To evaluate the performance of modified binder; Marshall Stability test, Indirect Tensile Strength (ITS) test and Rheological test were performed on binders and bituminous concrete mixes. From Marshall Stability test, SBS dosage of 5% was found to be optimum polymer content for both aggregate mixes. Maximum tensile strength for both the aggregate bituminous mixes was achieved at 5% SBS content. It was observed that maximum Marshall Stability was achieved when Limestone aggregates were used for preparation of bituminous mixes. Zycotherm additive does not have any significant effect on the properties of bituminous concrete mixes. However Zycotherm additive tends to decrease viscosity of binder at a temperature above 100 ˚C which will result in lower mixing temperature without compromising the performance of bituminous binder. Rheological test on different binders has shown that Zycotherm additive has very less affect on rutting resistance of modified bitumen. It was finally concluded that best results were obtained from Limestone aggregates using 5% of SBS polymer and Zycotherm additive has no significant effect on mechanical properties of mix
Keywords: Base Bitumen, SBS Modified Bitumen, Zycotherm Additive, Stability, ITS, Marshall Stability, Dynamic Shear Rheometer, Limestone Aggregate, Riverbed Aggregate
Scope of the Article:
Performance Evaluation of Networks