Influence of Setting Time of Tack Coat on Bond Strength of Bituminous Paving Layers

Document Type : Research Paper

Authors

1 Department of Civil Engineering, National Institute of Technology, Rourkela, India

2 National Institute of Technology, Rourkela, India

Abstract

Poor adhesion between two successive bituminous layers causes adverse effects on the structural strength of the pavement and develops a numbers of premature failure. To improve the adhesion, it is a general practice to apply a tack coat over an existing or newly constructed bituminous surface before laying another bituminous layer. The main objective of this study is to explore the influence of setting time of tack coat material on the bond strength of a bituminous layer combination. The influence of tack coat type, application rate and test temperature on the interlayer bond strength (ILBS) have also been studied. Two types of bituminous emulsions (CRS 1 and CMS 2) and two types of bituminous binders (VG 10 and VG 30) have been selected as tack coat for a typical bituminous layer combination. When no tack coat is used, the influence of time interval between laying of the two successive bituminous layers has also been studied. A specially fabricated attachment (named interlayer bond strength testing device) has been used by fitting it to the loading frame of a Marshall testing apparatus. It is observed that the ILBS depends on setting time, test temperature, tack coat type and application rate of a tack coat. Out of the four tack coat materials, CMS 2 offers the maximum ILBS with minimum quantity requirements in the bituminous layer combination considered. The highest ILBS is observed when no tack coat is used, however the upper layer is to be laid and compacted immediately after the lower layer.

Keywords

References

-ASTM D 1559 (1989) “Test method for resistance of plastic flow of bituminous mixtures using Marshall apparatus”, American Society for Testing and Materials, Philadelphia, USA.
-ASTM D 6934 (2008) “Standard test method for residue by evaporation of emulsified asphalt”, American Society for Testing and Materials, Philadelphia, USA.
-ASTM D 7496 (2011) “Standard test method for viscosity of emulsified asphalt by Saybolt Furol Viscometer”, American Society for Testing and Materials, Philadelphia, USA.
-Al-Qadi, I. L., Hasiba, K. I., Cortina, A. S., Ozer, H., Leng, Z., Parish, D. C. and  Worsfold, S. J. (2012) “Best practices for implementation of tack coat: PART I-Laboratory study”, Research Report ICT-12-004, Department of Civil and Environmental Engineering, Illinois Center for Transportation, University of Illinois at Urbana-Champaign.
-IS: 73. (2006) “Paving bitumen-specification (Second Revision)”, Bureau of Indian Standards, New Delhi, India.
-IS: 1203. (1978) “Methods for testing tar and bituminous materials: determination of penetration”, Bureau of Indian Standards, New Delhi, India.
-IS: 1205. (1978) “Methods for testing tar and bituminous materials: determination of softening point”, Bureau of Indian Standards, New Delhi, India.
-IS: 2386 (Part I, III, and IV) (1963) “Methods of test for aggregates for concrete”, Bureau of Indian Standards, New Delhi, India.
-Kucharek, T., Esenwa, M. and Davidson, J. K. (2011) “Determination of factors affecting shear testing performance of bituminous emulsion tack coats”, 7e congrès annuel de Bitume Québec, Saint-Hyacinthe, Canada.
-Miro, R., Martínez, A., and Perez, F. (2006) “Evaluation of effect of heat-adhesive emulsions for Tack coats with shear test: From the Road Research Laboratory of Barcelona”, Annual Meeting of the Transportation Research Board: Journal of the Transportation Research Board, Vol.1, pp. 64-70, DOI: 2117/2878.
-Ministry of Road Transport and Highways (MORTH 2013) “Specifications for Road and Bridge Works, Section 500, Fifth Revision”, Indian Roads Congress, New Delhi, India.
-Ministry of Road Transport and Highways (MORTH 2007) “Specifications for Road and Bridge Works, Section 500, Fourth Revision”, Indian Roads Congress, New Delhi, India.
-Mohammad L. N., Bae, A., Elseifi, M.A., Button, J. and Scherocman, J. A. (2009) “Interface shear strength characteristics of emulsified tack coats”, Journal of the Association of Asphalt Paving Technologists, Vol. 78, pp. 249-278.
-Patel, N. B. (2010) “Factors affecting the interface shear strength of pavement layers”, Unpublished Thesis of in Civil Engineering, Louisiana State University and Agricultural and Mechanical College, Baton Rouge, Louisiana, United States.
-Partl, M. N., Bahia, H.U., Canestrari, F., de la Roche, C., Di Benedetto, H., Piber, H., Sybilski, D. (Eds.). (2012) “Advances in Inter laboratory Testing and Evaluation of Bituminous Materials”, Springer publication, pp.335-395.
-West R., Moore, J. and Zhang, J. (2005) “Evaluation of bond strength between pavement layers”, NCAT Report 05-08, National Center for Asphalt Technology, Auburn, Alabama, USA.
-Wheat, M. (2007) “Evaluation of bond strength at asphalt interfaces”, Master’s Thesis, Department of Civil Engineering, Kansas State University, Manhattan, Kansas.
International Journal of Transportation Engineering
Volume 2, Issue 4 - Serial Number 4
April 2015
Pages 297-306

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