Methodology Development for performance evaluation of low volume roads in the State of Chhattisgarh

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1 Methodology Development for performance evaluation of low volume roads in the State of Chhattisgarh By Sunny Deol. G Assistant Professor Dept. of Civil Engineering STA- NIT-Raipur 12 th June 2014

2 Research Project Proposal

3 Contents Objectives Scope of Work Methodology Brief Introduction About Performance Analysis Non-destructive testing methods

4 Mechanistic-empirical design process

5 Mechanistic-Empirical method

6 Study Objectives To study the various types of NDT test methods for collecting the pavement responses of different category of the roads on the distinct soil strata in the state of Chhattisgarh Selection of appropriate NDT and Conventional test method. Collection of data by performing various NDT as well as conventional field & lab test on different location. Analysis of the results from the objective 1, 2, & 3, including software. To prepare and develop a data base of in-situ resilient modulus of various types of soils using NDT tests Development of methodology on rapid NDT test for low volume roads

7 Scope of Work To study and understand various conventional practices being adopted for the performance evaluation of low volume roads. To carryout laboratory and in-situ experimental work on various low volume road sections in the state of Chhattisgarh.

8 Methodology Research Objectives Scope of the work Litera ture Survey Primary/Secondary Data Collection Reconnaissance Su rvey PMGSY road sections in CG state (Location Selection Methodology for NDT test Investigation s Back calculation Procedures Field Investigations Laboratory Investigations Resilient Moduli Data base of Strength Parameters Deflection data from NDT Back calculation of Surface m oduli Development of Correlations with various strength parameters LWD mod/elmod Research Output

9 Field & Laboratory Investigations Investigations Field Investigations Laboratory Investigations Crust thickness measurement In-situ density assessment for all layers BBD survey for surface layers Subgrade Sieve Analysis Atterberg s Limits Granular Subbase (GSB) Sieve Analysis Atterberg s Limits Wet mix macadam (WMM) Sieve Analysis Combined Flakiness & Elongation index Bituminous layers Sieve Analysis LWD survey for all layers Free swell Index 10% fines value Aggregate Impact value (AIV) AIV, FI & EI Extraction of core from bituminous layers Findings Modified Proctor test Soaked CBR at MDD & FDD Modified Proctor test Soaked CBR at MDD & FDD Water Absorption test Atterberg s Limits Binder content Modified Proctor test Pavement Design Alternatives/Maintenan ce strategies Performance Analysis

10 Study Outcomes Data base for model development for Reducing the huge testing cost Realistic Assessment of Pavement behavior Accelerating the decision making process in defining the maintenance strategies.

11 Work Schedule

12 Performance Evaluation

13 Step-2: Prediction of pavement performance

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15 Critical failure locations of flexible pavement

16 Pavement Behavior Under loading

17 Non-Destructive Testing NDT equipment operates by applying a load to the pavement and measuring the resulting maximum surface deflection or the surface deflection basin. NDT results are used to determine the following: Asphalt Pavements Elastic modulus of each of the structural layers Allowable loads for a specified number of load applications Overlay thickness design

18 Pavement Deflection Measurement Devices

19 FWD

20 Light Weight Deflectometer

21 Data Analysis Tools: LWDmod KENPAVE

22 LWD Data Analysis

23 Methodology of Resilient Modulus Primary Data Secondary Data Trial Pit FMC LWD Pavement composition Surface deflections Surface modulus Details of chainage Design crust thickness Vehicular loadings Root mean Square (RMS value) Rayleigh damping parameters Back calculated layer moduli (LWDmod software) Viscous damping parameters M R value of Subgarde and Granular layers Required surface modulus Overlay Thickness (LWDmod software)

24 Surface Modulus

25 Surface deflections

26 Analysis of Pavement responses

27 Section-wise Back calculated Layer moduli

28 Seed values (Damping Parameters)

29 Design of overlay Thickness

30 Estimation of Stress and Strains F PAVE IIT PAVE KENPAVE MICHPAVE ILLIPAVE ELMODE 6.0

31 KENPAVE

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42 Tensile strain

43 Compressive Strain

44 THANK YOU

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