Laboratory Studies to Assess the Fatigue Behavior of Bituminous Concrete Mix Lokesh Gupta 1(&) and Rakesh Kumar 2 1 Department of Civil Engineering, Sir Padampat Singhania University, Udaipur, India lokeshgupta699@gmail.com 2 Department of Civil Engineering, S.V. National Institute of Technology Surat, Gujarat, India Abstract. Bituminous concrete is a premix widely used in road construction as a surface course. A high amount of expenditure is required for the construction of pavement structure. Due to increase in the magnitude of commercial vehicles, bituminous mixes are now exposed to greater stresses, and hence the perfor- mance of bituminous mixes is not good enough for paving applications. The present investigation, primly emphasizes to study the effect of filler materials and stress levels based on tensile strength on the number of load repetition sustained against the initiation of the first crack of a bituminous concrete mix. At controlled test temperature 25 °C, Indirect tensile fatigue test is conducted on bituminous concrete mix prepared using Stone dust and Cement as filler materials at 10%, 20%, and 30% stress level. Further regression analysis Based on the data obtained from Indirect Tensile Fatigue test and cost estimation per km for the construction of one kilometer of bituminous concrete mix prepared using both types of filler materials is carried out. As per the limited laboratory studies carried out, It can be concluded that no of load repetition varies with the addition of filler content and filler type. Fatigue life against the cracks decreases with an increase in stress level irrespective of filler materials. In the mathe- matical model Stress level and tensile stress are statistically significant with fatigue life, i.e., no of load repetition of a bituminous concrete mix. Keywords: Fatigue life Á Stress Á Indirect tensile fatigue test Á Stone dust Cement 1 Introduction Presently rise in traf fic flow has been noticed on most of the road stretches in India. Bituminous layer within the pavement structure experiencing a high amount of stress caused subsequently due to increases axle load, contact and tyre pressure. In addition to this considerable change in pavement temperature and stress developed may further result in progress of pavement distress. Appropriate selection of filler type and its share in the bituminous mix improves performance and fatigue behaviour of surface course (Gupta and Suresh 2017). Bituminous concrete is strong enough to handle years of vehicle traf fic and is relatively easy to repair or refinish (Rodrigues 2000). Fatigue failure is one of the main © Springer Nature Switzerland AG 2019 S. El-Badawy and R. Abd El-Hakim (Eds.): GeoMEast 2018, SUCI, pp. 124–134, 2019. https://doi.org/10.1007/978-3-030-01908-2_10