IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308 _______________________________________________________________________________________ Volume: 05 Issue: 03 | Mar-2016, Available @ http://www.ijret.org 32 A STUDY ON THE MARSHALL PROPERTIES OF DBM MIX PREPARED USING VG-30 AND CRMB-55 AS BINDER MATERIALS Lokesh Gupta 1 , Ashutosh Patil 2 , Avinash Ojha 3 1 Assistant Professor, Civil Engineering Department, Sir Padampat Singhania University Udaipur, Rajasthan, India 2 Assistant Professor, Civil Engineering Department, N. B. Navale Sinhgad College of Engineering Solapur, Maharashtra, India 3 Assistant Professor, Civil Engineering Department, Sir Padampat Singhania University Udaipur, Rajasthan, India Abstract A good bituminous mix design is anticipated to produce a mix which is supposed to be sufficiently sturdy, long-lasting, resistive.DBM is used as a binder course in the highway pavement. Binder is a prime material in the bituminous mix. Marshall properties of bituminous mix varies from binder to binder. In this work an effort has been ended to evaluate the Marshall properties of dense bituminous macadam prepared using VG-30 and CRMB-55 as binder materials. DBM mix is prepared using 2% lime as filler material and VG-30, CRMB-55 as binder material. Marshall method of bituminous mix design is adopted to decide the optimum bitumen content (OBC )and Marshall properties were determined at optimum bitumen content. On the basis of limited laboratory studies carried out, it is conclude that CRMB-55 is superior binder material in terms of Marshall properties. Key Words: VG-30, CRMB-55, Lime, and DBM. --------------------------------------------------------------------***---------------------------------------------------------------------- 1. INTRODUCTION Greater part of the roads in India is black topped. Earlier due to scarcity of cement, it was a trend and convention to adopt the bituminous road as flexible pavement. Therefore, bituminous pavement are adopted over cement concrete roads, since it has a immense pro that these pavement can be enhanced and strengthened as the traffic increases in the different phase.. Dense bituminous macadam is a binder course used for road construction with more number of heavy commercial vehicles. The permanence and remote future acceptable performance of pavements are invariably shaped and altered to a large scale by the occupied pavement integral materials and their natural properties. In DBM, constituents of mix such as coarse aggregate, fine aggregates, filler material and bitumen or modified bitumen as binder material are the chief ingredients and therefore mandatorily have to posses superior quality without any compromise. Hence the choice of pavement material is an essential assignment. The pertinence and glutinous properties of binder material, moreover with the appropriate proportioning of coarse aggregates and fine aggregate is the fundamental necessity to result in effective and applicable bituminous mixes. In a DBM mix, there is a wide scope for using different types of binder to obtain a good mix without affecting the durability of pavement. 2. OBJECTIVES OF PRESENT STUDIES The main objectives of the analysis are-  Ensure the properties of aggregates by conducting the test in the laboratory as per MoRT&H (IV Revision) specification.  To conduct tests on bitumen binder.  To determine the optimum bitumen content for bituminous concrete mix (Grade-2) prepared using VG-30 and CRMB-55 as binder materials by adopting Marshall method of bituminous mix design.  To determine the Marshall properties of bituminous concrete mix (Grade-2) prepared using VG-30 at OBC.  To determine the Marshall properties of bituminous concrete mix (Grade-2) prepared using CRMB-55 at OBC.  To compare the Marshall properties of bituminous concrete mix (Grade 2) prepared using VG-30 and CRMB-55. 3. EXPERIMENTAL INVESTIGATION DBM mix is prepared using viscosity grade (VG-30) and CRMB-55 as binder material . Aggregate material was tested in the laboratory to ensure its selection as pavement material for the construction of road. Marshall method of bituminous mix design is used for preparing bituminous mix design. 3.1 Aggregates Aggregates posses good shear and compressive strength, therefore results in better interlocking properties. To assess the properties of aggregates i.e. sufficient strength, hardness, toughness, specific gravity and shape, tests were conducted on aggregates in the laboratory and the test results are presented in table-1.