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Mndot GRADING & BASE MANUAL

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Mndot GRADING & BASE MANUAL MnDOT GRADING & BASE MANUAL (Note: Use with the 2018 standard specifications. Use the 2016 Grading and Base Manual with the 2016 and prior standard specifications.) Published by Geotechnical Section Grading & Base Unit August 23, 2017 Foreword Grading and Base construction utilizes large quantities of materials. The control of the quality and placement of these materials involves the application of various test procedures and inspection techniques to ensure the materials and the manner in which they are placed comply with the specification requirements. The manual’s procedures help ensure uniformity of methods and that materials are placed as specified. Grading and Base Engineer Minnesota Department of Transportation Preface The final control of the quality of materials and their use is accomplished by the Engineer and Inspectors. Field personnel verify that materials meet the specifications, and procedures are followed. This manual specifies: sampling, testing and inspection requirements. Emphasis has been placed on procedures for field use and the application of the test results in controlling aggregate production and construction methods. Included is a section on soils classification. Table of Contents 5-692.000 General ........................................................................................................................1 5-692.001 Duties of the Inspector ................................................................................................1 5-692.002 Grading Construction ..................................................................................................2 5-692.003 Base Construction .......................................................................................................4 5-692.100 Sampling, Random Sampling and Splitting ................................................................5 5-692.101 Sampling, Random Sampling and Splitting - General ................................................5 5-692.102 General Sampling Requirements ................................................................................6 5-692.103 Rate of Sampling (Schedule of Materials Control) ....................................................6 5-692.104 Sampling at the Source (Contractor) ..........................................................................6 5-692.106 Sampling for Embankment Construction ...................................................................6 5-692.107 Sampling from the Road for Base, Surface and Shoulder Aggregates .......................6 5-692.110 Quality Control (QC) Testing, Sampling and Certification ........................................6 5-692.111 Contractor Control Charts and Tables ........................................................................7 5-692.120 Verification Testing (VT): Roadway Materials Sampling and Testing .....................8 5-692.125 Random Sampling Procedures ....................................................................................8 5-692.130 Non-Random Sampling ............................................................................................12 5-692.135 Sampling for Proctor (Moisture Density Test) .........................................................12 5-692.140 Splitting .....................................................................................................................13 5-692.141 Quartering Method of Sample Size Reduction .........................................................13 5-692.142 Ring and Cone Method of Sample Size Reduction ..................................................14 5-692.143 Riffle Splitter Method of Sample Size Reduction ....................................................16 5-692.150 Independent Assurance (IA) Sampling and Testing .................................................16 5-692.160 Sample Identification Card .......................................................................................17 5-692.170 Documentation ..........................................................................................................18 5-692.180 Sampling Bituminous Stabilized Materials ..............................................................19 5-692.181 Sampling for Stabilized Full Depth Reclamation (SFDR) Mix Design ...................20 5-692.182 Sampling for Cold In-Place Recycling (CIR) Mix Design .......................................20 5-692.200 Methods of Testing ...................................................................................................21 5-692.201 Test for Shale in Coarse Aggregate – Pick Method ..................................................21 5-692.202 Test for Shale in Fine Aggregate – Float Method ....................................................21 5-692.203 Field Test to Determine Crushing (%) - Conveyor Belt Method .............................21 5-692.204 Determination of Crushing (%) - By Crushed Particle Count of + No. 4 ................24 5-692.215 Sieve Analysis Test Procedure (Gradation) ..............................................................26 5-692.216 Washing & Drying Gradation Samples Containing Salvaged Bituminous ..............30 5-692.222 Moisture-Density Test Method (Proctor) .................................................................30 5-692.231 Calibration of Sand Cone and Ring ..........................................................................44 5-692.232 Calibration of Standard Sand ....................................................................................44 5-692.245 Moisture Test ............................................................................................................46 5-692.246 Field Density Test: Sand Cone Method ....................................................................55 5-692.247 Sampling and Inspection – Field Density .................................................................55 5-692.248 Field Density Test Procedure ....................................................................................55 5-692.251 Relative Density ........................................................................................................59 5-692.253 Relative Moisture ......................................................................................................59 5-692.255 Dynamic Cone Penetrometer (DCP).........................................................................61 5-692.256 Light Weight Deflectometer Procedure & Target Value Determination ..................67 5-692.260 Pulverization Determination for Binder Soils ..........................................................73 5-692.270 Test Rolling...............................................................................................................73 5-692.280 Moisture-Density Test Using Modified Effort .........................................................76 5-692.281 Moisture Test for Bituminous Stabilized Materials ..................................................81 5-692.282 In-Place Density Using Nuclear Methods ................................................................81 5-692.284 Measuring Grinding Depth in the Field ....................................................................83 5-692.285 Measuring Expansion Ratio and Half-Life of Foamed Asphalt in the Field ............84 5-692.286 Measuring Field Application Rates for Cement or Bituminous Materials ...............85 5-692.288 Soil-Cement Laboratory Design Procedure ..............................................................86 5-692.290 SFDR Mix Design Procedure ...................................................................................88 5-692.291 CIR Mix Design Procedure.......................................................................................94 5-692.293 Field Gradation Procedure for CIR & SFDR..........................................................100 5-692.294 Field Verification Tests and Observations for Determining Optimum Amount of Oil for CIR, CCPR, and SFDR and Constructability Issues .........................................101 5-692.300 Reports ....................................................................................................................102 5-692.301 Grading and Base Reports ......................................................................................102 5-692.315 Materials Certification ............................................................................................104 5-692.316 Project Compliance Review ...................................................................................106 5-692.400 Field Inspection of Materials ..................................................................................107 5-692.401 Culvert Inspection and Installation .........................................................................107 5-692.430 Grading and Base Conversion Factors (English) ....................................................109 5-692.500 Treatment & Stabilization of Soils/Bases ...............................................................111 5-692.515 Use of Calcium Chloride for Dust Control .............................................................111 5-692.521 Use of Lime to Dry Soil ..........................................................................................111 5-692.600 Soil Classification Introduction ..............................................................................113 5-692.601 Soil Identification ...................................................................................................113 5-692.602 Pedological
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