IDL - International Digital Library Of Technology & Research Volume 1, Issue 5, May 2017
Available at: www.dbpublications.org
International e-Journal For Technology And Research-2017
Indirect Tensile Strength of Modified Bitumen Mixture Satyanarayana Bale, Head Of Department Of Civil Engineering Ramachandra College of Engineering, Eluru, A.P-534007.India
Abstract: - The performance of flexible pavements depends on bituminous mixture and external factors such as traffic loading and weather conditions. Bitumen mixture is elastic, viscoelastic and plastic material where rate of traffic loading and weather conditions plays very significant role on its behavior .Conventional bitumen mixture is unable bear the present traffic volume and environmental conditions by considering this an attempt has been made to study the indirect tensile strength of modified bitumen mixture using cellulose fiber as a modifier. Higher tensile strength resist the cracks, fatigue and rutting which are common failure in the flexible pavements. For preparation of bituminous concrete mixture (BC) gradation has been taken as per MORTH (table no: 500-18) specification. Bitumen content is optimized at 5% and cellulose binder content has been varied such as 1%, 3% and 5% of total mix. Conducted different types of tests such as penetration, ductility, softening point and indirect tensile strength . It has been observed that the behavior of asphalt cement after adding the modifier differ from percentage to another, At 5% an ideal improvement to the fatigue and rutting resistance properties of the asphalt cement in terms of indirect tensile strength as compared with 1%,2% of modifier and conventional bitumen . The addition of 5% Cellulose is found more significant. I. INTRODUCTION Bituminous mixture is a composite material consists of bitumen (binder), coarse aggregates, fine aggregates and filler and suitability of these materials according to their availability and specification should be thoroughly examined before undertaking any design methodology. Different pavement design methods need various types of desirable properties of materials. Therefore it is very necessary to determine engineering properties of materials that are used in pavement construction. The present study was related to improving the tensile strength of bituminous mixes for resisting the fatigue and rutting potential. Different kinds of basic aggregates tests has been conducted like aggregate impact test, Los Angeles abrasion test, aggregates crushing test, stripping of aggregates and specific gravity . In the same manner basic bituminous tests also conducted such as penetration test, softening point test and ductility test.
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