Case study Case investigation on application of steel fibers in roller compacted concrete pavement in Thailand Piti Sukontasukkul a, *, Udomvit Chaisakulkiet b , Pitthaya Jamsawang c , Suksun Horpibulsuk d , Chai Jaturapitakkul e , Prinya Chindaprasirt f a Construction and Building Materials Research Center, Department of Civil Engineering, Faculty of Engineering, King Mongkut’s University of Technology North Bangkok, Thailand b Department of Civil Engineering, Rajamangala University of Technology Rattanakosin, Nakhon Pathom, Thailand c Soil Engineering Research Center, Department of Civil Engineering, Faculty of Engineering, King Mongkut’s University of Technology North Bangkok, Thailand d School of Civil Engineering and Center of Excellence in Innovation for Sustainable Infrastructure Development, Suranaree University of Technology, Thailand e Department of Civil Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi, Thung Khru, Bangkok 10140, Thailand f Sustainable Infrastructure Research and Development Center, Department of Civil Engineering, Faculty of Engineering, Khon Kaen University and Academy of Science, The Royal Society of Thailand, Thailand A R T I C L E I N F O Article history: Received 22 May 2019 Received in revised form 1 July 2019 Accepted 19 July 2019 Keywords: RCCP Fiber reinforced RCCP Compressive strength Flexural performance Flexural toughness Residual strength A B S T R A C T This case study aims to investigate the improvement in mechanical behavior of roller compacted concrete pavement (RCCP) mixed with steel fibers. Hooked end type steel fibers were used at 0.5 and 1.0% by volume fractions. The modified Proctor test was adopted in the mix proportional process to determine the optimum moisture content for each type of RCCP. The Vebe consistency test was used to determine their consistencies under surcharge load. The experimental series consisted of compression and flexural performance tests to investigate the development of compressive strength, strain energy density, flexural strength, flexural toughness, and residual strength at different concrete ages. Tests were carried out at 3, 7, 14, and 28 days. Results showed that the water requirement and density of fiber reinforced roller compacted concrete pavement (FRRCCP) were slightly higher than those of RCCP. The compressive strength was found to decrease by 1–2% with an increase in fiber content. However, flexural strength, toughness, and residual strength improved significantly with the addition of steel fibers. All mechanical properties were found to increase with age. © 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). 1. Introduction In 2018, Thailand’s road network has approximately 470,000 km in length [1]. Generally, there are two types of road pavements in Thailand: flexible (asphaltic materials) and rigid (reinforced concrete) pavements. Both must be laid on stable soil foundations, which may sometimes require chemical stabilization. This process is meant to improve the mechanical properties of problematic soil foundations prior to road construction [2,3] due to the rapid strength gain. * Corresponding author. E-mail addresses: piti.kmutnb@gmail.com, piti.s@kmutnb.ac.th, piti@kmutnb.ac.th (P. Sukontasukkul). https://doi.org/10.1016/j.cscm.2019.e00271 2214-5095/© 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/ 4.0/). Case Studies in Construction Materials 11 (2019) e00271 Contents lists available at ScienceDirect Case Studies in Construction Materials journal homepa ge: www.elsevier.com/locate/cscm