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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/4799
Title: Strength characteristics of SBS modified asphalt mixes with various aggregates
Authors: Singh M.
Kumar, Praveen Kishore
Maurya, Mannar Ram
Published in: Construction and Building Materials
Abstract: In recent years, many authors have researched polymer-modified bituminous (PMB) mixes and tried to better understand the effect of these modifiers on the strength characteristics of hot mix asphalt mixes. The objective of this study is to determine the effect of bitumen modification with varying percentage of Styrene bitudiene styrene (SBS 3%, 5% and 7%) for preparing the hot mix asphalt (HMA) containing various aggregates (marble, granite and quartzite) and compare the results with mixes prepared with neat VG 30 HMA. The selection of aggregates has been made on the basis of their acidic and basic nature depending upon the amount of silica oxide and calcium carbonate present in them. Dynamic shear rheometer (DSR) was used to determine the mixing and compacting temperatures of modified bitumen and performance grade based on G /Sin ? value. The physical and mechanical properties of SBS modified bitumen and neat bitumen aggregates mixes are evaluated. Retained Marshall Stability (RMS) test and tensile strength ratio (TSR) tests were carried out to determine the moisture susceptibility and wheel tracking test was performed to compare the results of permanent deformation in samples. The results indicate that there was significant improvement in the strength characteristics, rutting resistance and moisture susceptibility of SBS modified mixes. Aggregates basic in nature i.e. with higher calcium (Ca) content show better bonding with neat bitumen compared to acidic aggregates i.e. aggregates with higher silica (Si) content. But with modified bitumen the percentage improvement in strength and moisture susceptibility is more pronounced in case of siliceous aggregates compared to calcareous aggregates. ¬© 2013 Elsevier Ltd. All rights reserved.
Citation: Construction and Building Materials(2013), 41(): 815-823
URI: https://doi.org/10.1016/j.conbuildmat.2012.12.062
http://repository.iitr.ac.in/handle/123456789/4799
Issue Date: 2013
Keywords: Calcareous aggregates
DSR
Moisture susceptibility
SBS polymer
Siliceous aggregates
TSR
ISSN: 9500618
Author Scopus IDs: 57208370698
55466569500
7005255411
Author Affiliations: Singh, M., Civil Engineering Department, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Kumar, P., Civil Engineering Department, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Maurya, M.R., Chemistry Department, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Corresponding Author: Singh, M.; Civil Engineering Department, Indian Institute of Technology Roorkee, Roorkee 247 667, India; email: maniravi79@gmail.com
Appears in Collections:Journal Publications [CE]

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