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From page 41... ... 41 Field Evaluation Introduction Initial field tests for this research took place at two locations: Cleburne, Texas, and the 9.5 km (6 mi.) MnROAD test track pavement facility located 65 km (40 mi.) Read the entire page →
From page 42... ... 42 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction (a) Read the entire page →
From page 43... ... Field Evaluation 43 North Side South Side MnROAD Low-Volume Road Figure 4-2. Location of cells used for test sections in MnROAD low-volume road. Read the entire page →
From page 44... ... 44 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction (a) Read the entire page →
From page 45... ... Field Evaluation 45 Proof Mapping. Minnesota DOT and UTEP personnel coordinated to perform proof mapping of test sections after compaction of the section was finished. Read the entire page →
From page 46... ... 46 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction of spot-test measurements was modified for Cell 185 and Cell 186 to accommodate enough representative measurements. The NDT devices used for those tests included: • Nuclear Density Gauge (NDG) Read the entire page →
From page 47... ... Field Evaluation 47 0 25 50 75 100 125 150 175 0 50 100 150 200 250 Bulk Stress (kPa) Read the entire page →
From page 48... ... 48 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction Cells Moisture Content % Dry Density Nonlinear Parameters Representative Resilient Modulus (MR) Read the entire page →
From page 49... ... Field Evaluation 49 operating speed and frequency. In addition, the CMVs obtained on top of the flexible bases were greater than those obtained on their respective subgrades. Read the entire page →
From page 50... ... 50 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction Each sublot was equal in width to the width of the roller, and the length was equal to the minimum length of the compacted section that was deemed practical to rework, as set by the judgment and discretion of the engineer. In the study performed at MnROAD, a length of 7.5 m (25 ft.) Read the entire page →
From page 51... ... Field Evaluation 51 (b) Number of CMV Measurements (a) Read the entire page →
From page 52... ... 52 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction the eccentric force, and the drum and frame inertia. The drum and frame weight, masseccentricity, and phase lag are parameters listed among the operating features of the roller used at the site, and are provided in Table 4-2. Read the entire page →
From page 53... ... Field Evaluation 53 force-displacement hysteresis loops from proof-mapping measurements along one of the line passes on top of the two different subgrade materials and on top of one of the base materials, respectively. Figure 4-16 compares the stiffness between the sandy and clayey subgrade materials. Read the entire page →
From page 54... ... 54 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction Red = > 133% Mean; Yellow = 100%–133% Mean; Green = < Mean. Figure 4-14. Read the entire page →
From page 55... ... Field Evaluation 55 -200 -150 -100 -50 0 50 100 150 200 -2.5 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5Fo rc e ( kN ) Deflection (mm) Read the entire page →
From page 56... ... 56 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction Red < 75% Mean; Yellow = 75%–100% Mean; Green > Mean. Stiffness Value (MN/m) Read the entire page →
From page 57... ... Field Evaluation 57 Red = < 75% Mean; Yellow = 75%–100% Mean; Green = > Mean. Read the entire page →
From page 58... ... 58 Evaluating Mechanical Properties of Earth Material During Intelligent Compaction is color coded using the criteria shown in Table 4-7. The FWD moduli were calculated using the same equation for calculating the LWD moduli, by using the deflection directly under the load. Read the entire page →
From page 59... ... Field Evaluation 59 (a) Operating Frequency (Hz) Read the entire page →

From page 41...

... 41 Field Evaluation Introduction Initial field tests for this research took place at two locations: Cleburne, Texas, and the 9.5 km (6 mi.) MnROAD test track pavement facility located 65 km (40 mi.)