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From page 111... ... A-1 Proposed Standard Specifications and Test Methods to Estimate Mechanical Properties of Geomaterials Using Intelligent Compaction This appendix contains the proposed specifications developed during NCHRP Project 24-45, which was conducted to develop procedures to estimate mechanical properties of geomaterials using Intelligent Compaction (IC) Read the entire page →
From page 112... ... A-2 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction PROPOSED STANDARD SPECIFICATION FOR EXTRACTING MODULUS OF COMPACTED GEOMATERIALS USING INTELLIGENT COMPACTION (IC) AASHTO Designation: PP YY-XX 1 1. Read the entire page →
From page 113... ... Proposed Standard Specifications and Test Methods to Estimate Mechanical Properties of Geomaterials Using Intelligent Compaction A-3 3.4 Vibration Amplitude -- The height of a roller drum's lift from the pavement surface during vibratory compaction. 3.5 Mapping -- Collecting IC data at a specific vibration setting and roller speed after completion of the compaction process. Read the entire page →
From page 114... ... A-4 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction 5.1.2 GPS Radio and Receiver Units -- GPS units shall be mounted on each IC roller to monitor the drum locations and track the number of passes of the rollers. The mounted GPS units connect with hand-held survey-grade GPS rover(s) Read the entire page →
From page 115... ... Proposed Standard Specifications and Test Methods to Estimate Mechanical Properties of Geomaterials Using Intelligent Compaction A-5 6.3 Perform Pre-Mapping -- Follow AASHTO T XXX 3 to pre-map the existing layer prior to placement and compaction of the layer of interest. Perform the pre-mapping process at low amplitude and low frequency vibration settings with forward passes of the IC roller over the section at a uniform speed of no more than 3 mph (5 km/h) Read the entire page →
From page 116... ... A-6 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction 6.6 Perform Proof Mapping of Compacted Layer -- Upon completion of the compaction process, map the section using the IC roller with the same vibration settings as in Section 6.3, "Pre-Mapping," to generate color-coded maps of the vibration amplitude (surface deformation) using a rectangular grid. Read the entire page →
From page 117... ... Proposed Standard Specifications and Test Methods to Estimate Mechanical Properties of Geomaterials Using Intelligent Compaction A-7 ELWD-1, the averaged effective LWD modulus (Eeff) as obtained from the spot tests on top of the underlying layer (subgrade) Read the entire page →
From page 118... ... A-8 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction Appendix I – Estimating Resilient Modulus Constitutive Model Coefficients (as per FHWA-LTPP) Crushed Stone Base Materials: k1 = 0.7632 + 0.008(P3/8) Read the entire page →
From page 119... ... Proposed Standard Specifications and Test Methods to Estimate Mechanical Properties of Geomaterials Using Intelligent Compaction A-9 PROPOSED STANDARD SPECIFICATION FOR QUALITY MANAGEMENT AND DESIGN VERIFICATION OF EARTHWORK AND UNBOUND AGGREGATES USING INTELLIGENT COMPACTION (IC) AASHTO Designation: PP XX-XX 1 1. Read the entire page →
From page 120... ... A-10 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction 3.4 Vibration Amplitude -- The height of a roller drum's lift from the pavement surface during vibratory compaction. 3.5 Mapping -- Collecting IC data at a specific vibration setting and roller speed after completion of the compaction process. Read the entire page →
From page 121... ... Proposed Standard Specifications and Test Methods to Estimate Mechanical Properties of Geomaterials Using Intelligent Compaction A-11 transmit and record GPS data. The recorded GPS data, whether from the IC rollers or handheld GPS rovers, shall include the date (in yyyymmdd format) Read the entire page →
From page 122... ... A-12 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction 6.4 Perform Pre-Mapping -- Follow AASHTO T XXX 3 to pre-map the existing layer to generate color-coded maps of the ICMV and COV of ICMV and to assess the uniformity of the existing layer prior to placement and compaction of the layer of interest. Perform the pre-mapping process at low amplitude and low frequency vibration settings with forward passes of the IC roller over the section at a uniform speed of no more than 3 mph (5 km/h) Read the entire page →
From page 123... ... Proposed Standard Specifications and Test Methods to Estimate Mechanical Properties of Geomaterials Using Intelligent Compaction A-13 7.1.1.2 Option 2 -- Estimate k1 through k3 related to Equation 7.2 for the OMC and MDD from a catalog of materials tested locally, often in conjunction with the implementation of the mechanistic-empirical design algorithms and convert them to k´1 through k´3 according to the process discussed in Section 7.1.2. 7.1.1.3 Option 3 -- Estimate regression parameters k1 through k3 related to Equation 7.2 for the optimum moisture content and maximum dry density from relationships established in the literature. Read the entire page →
From page 124... ... A-14 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction Appendix I – Estimating Resilient Modulus Constitutive Model Coefficients (as per FHWA-LTPP) Crushed Stone Base Materials: k1 = 0.7632 + 0.008(P3/8) Read the entire page →
From page 125... ... Proposed Standard Specifications and Test Methods to Estimate Mechanical Properties of Geomaterials Using Intelligent Compaction A-15 PROPOSED STANDARD TEST METHOD FOR DETERMINING INTELLIGENT COMPACTION MEASUREMENT VALUE (ICMV) Read the entire page →
From page 126... ... A-16 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction 3.1.2 IC rollers shall be equipped with GPS radio and receiver units mounted on each roller to monitor the drum locations and track the number of passes of the roller. The mounted GPS units connect with hand-held survey-grade GPS rover(s) Read the entire page →
From page 127... ... Proposed Standard Specifications and Test Methods to Estimate Mechanical Properties of Geomaterials Using Intelligent Compaction A-17 Figure 1. GPS calibration process. Read the entire page →
From page 128... ... A-18 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction Table 2. Material type designation acronyms. Read the entire page →
From page 129... ... Proposed Standard Specifications and Test Methods to Estimate Mechanical Properties of Geomaterials Using Intelligent Compaction A-19 4.6 Deliver the electronic IC data files and a hard copy of the color-coded map to the Engineer. The IC data will be color-coded using green, yellow, and red colors as shown in Table 5 and Figure 2. Read the entire page →
From page 130... ... A-20 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction Inspector Name: Date: Project Location: Coordinate System: County: Roller Type: Material Type: Roller Model: Layer Type: Intelligent Compaction Data Report Worksheet Figure 3. IC data report worksheet (page 1) Read the entire page →
From page 131... ... Proposed Standard Specifications and Test Methods to Estimate Mechanical Properties of Geomaterials Using Intelligent Compaction A-21 Inspector Name: Date: Project Location: Coordinate System: County: Roller Type: Material Type: Roller Model: Layer Type: Intelligent Compaction Data Report Worksheet Figure 4. IC data report worksheet (page 2) Read the entire page →
From page 132... ... A-22 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction PROPOSED STANDARD TEST METHOD FOR ESTIMATING MODULUS OF EMBANKMENT AND UNBOUND AGGREGATE LAYERS WITH PORTABLE FALLING WEIGHT DEVICES AASHTO Designation: T YYY 1 1. SCOPE 1.1 This test method describes the procedure for measuring the deflection with a Light Weight Deflectometer (LWD) Read the entire page →
From page 133... ... Proposed Standard Specifications and Test Methods to Estimate Mechanical Properties of Geomaterials Using Intelligent Compaction A-23 Figure 1. Components of light weight deflectometer (LWD) Read the entire page →
From page 134... ... A-24 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction 5. PROCEDURE 5.1 Close off the entire testing area from any vehicular or construction equipment for the entire testing period. Read the entire page →
From page 135... ... Proposed Standard Specifications and Test Methods to Estimate Mechanical Properties of Geomaterials Using Intelligent Compaction A-25 6. ADJUSTMENT OF MEASUREMENTS 2 6.1 Alternatively, the measured LWD deflection, deff, can be converted to adjusted deflection, dadj, from: dadj = deff / Kadj (6.1) Read the entire page →
From page 136... ... A-26 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction 7.3 Estimate the Poisson's ratio, ν, of the geomaterial using recommended values shown in Table 1. Table 1. Read the entire page →
From page 137... ... Proposed Standard Specifications and Test Methods to Estimate Mechanical Properties of Geomaterials Using Intelligent Compaction A-27 Layer(s) tested and base layer thickness (if applicable) Read the entire page →

From page 111...

... A-1 Proposed Standard Specifications and Test Methods to Estimate Mechanical Properties of Geomaterials Using Intelligent Compaction This appendix contains the proposed specifications developed during NCHRP Project 24-45, which was conducted to develop procedures to estimate mechanical properties of geomaterials using Intelligent Compaction (IC)