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IRC: 82-2015: First Revision of Code of Practice for Maintenance of Bituminous Road Surfaces, New Delhi, IndiaĪbaza, K.A.: Performance-based models for flexible pavement structural overlay design. Strengthening of flexible Road Pavements Using Benkelman Beam Deflection Technique, First revision, New Delhi, India IRC:117-2015: Guidelines for the Structural Evaluation of Rigid Pavement by Falling Weight Deflectometer, New Delhi, India IRC:115-2014: Guidelines for Structural Evaluation and Strengthening of Flexible Road Pavements Using Falling Weight Deflectometer (FWD) Technique, New Delhi, India IRC:37-2012: Guidelines for the Design of Flexible Pavements (Third Revision) New Delhi, India IRC SP 72-2015: Guidelines for the Design of Flexible Pavements for Low Volume Rural Roads, First Revision, New Delhi, India Irwin, L.H.: Backcalculation: an overview and perspective. įleming, P., Frost, M., Lambert, J.: A review of the lightweight deflectometer (LWD) for routine insitu assessment of pavement material stiffness. doi: 10.1061/(ASCE)0733-947X(1999)125:5(463)Įlbagalati, O., et al.: Development of the pavement structural health index based on falling weight deflectometer testing. 8, 13–27 (2014)ĭas, A., Pandey, B.B.: Mechanistic-empirical design of bituminous roads: an Indian perspective. doi: 10.3141/2152-04īarodiya, P., Pateriya, I.K.: Estimating maintenance cost of rural roads in PMGSY. In: TRB 2010 Annual Meeting CD-ROM (2010). doi: 10.1007/s1144-0ĭu Tertre, A., et al.: Combined PFWD and surface wave measurements for evaluation of longitudinal joints in asphalt pavements. doi: 10.1520/E2583-07Īdam, C., Adam, D., Kopf, F.: Computational validation of static and dynamic plate load testing. Annual Book of ASTM Standards, ASTM International, West Conshohocken, PA, 04.03 (2007). KeywordsĪSTM, E2583-07: Standard test method for measuring deflections with a light weight deflectometer. The practical shortcoming of deflection correlation between BBD and LWD may be overcome by using more data points of LWD in Indian conditions for further research. The correlation of deflection values between LWD and BBD was found with R 2 value of 0.741. The LWDmod overlay thickness analysis ranges from 28.00 to 180 mm, and BBD based calculated overlay thickness ranges 10 to 210 mm were observed. Obtained backcalculated layer moduli results are used to calculate critical stresses and strains generated by standard axle load of 8 tons by using KENLAYER software. The proposed methodology for overlay design using LWD, LWDmod, and KENLAYER software’s results was discussed. Deflections collected by LWD using 20 kg falling weight with radial geophone spacing 300 mm and 600 mm are used in this study. Pavement deflection response data collected using a Benkelman Beam deflectometer (BBD) and lightweight deflectometer used to identify structural integrity of pavement. In this paper, an experimental stretch 550 m length and width 7 m was considered for structural evaluating the pavement using LWD and BBD. In some parts around the globe, still uses conventional Benkelman beam deflectometer (BBD) method for structural evaluation purpose.
For this type of roads, a light weight deflectometer (LWD) may be useful for structural evaluating the pavement layer moduli and overlay design. Low volume roads (LVR) are most accessible road network in India, and it contains thin asphalt surface (less than 100 mm).