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From page 104... ... 0 Quality assurance of Pavement Earthwork Using Roller-integrated Continuous Compaction Control (Recommended specification options) 4 into viable performance-based specifications that can be efficiently implemented in practice. Read the entire page →
From page 105... ... 0 COnTEnTS 106 7.1 Scope 106 7.2 Definitions 108 7.3 Notation 108 7.4 Important Considerations 110 7.5 Instrumented Roller Requirements 112 7.6 QA Option 1: Spot Testing of Roller-Informed Weakest Area(s) 113 7.7 QA Option 2: Limiting Percentage Change In Roller MV 114 7.8 QA Option 3: Comparison of Roller MV Data to Target MV 117 7.9 Uniformity Criteria Read the entire page →
From page 106... ... 0 7.1 Scope This specification covers the QA of subgrade, subbase, and aggregate base course compaction using roller-integrated CCC. The six recommended QA specification options are summarized in Table 7.1 and Figure 7.1. Read the entire page →
From page 107... ... 0 Figure 7.1. Summary of CCC specification options. Read the entire page →
From page 108... ... 0 Intelligent Compaction: the combined use of an Instrumented Roller and Automatic Feedback Control in an attempt to improve earthwork compaction. Layer: a component of the pavement earthwork with distinct soil properties (e.g., subgrade, subbase, or base course) Read the entire page →
From page 109... ... 0 orientation (e.g., forward, reverse) Read the entire page →
From page 110... ... 0 7.4.7 Calibration area Option 3 requires the establishment of an MV-TV prior to acceptance testing in an Evaluation Section. If possible, a portion of the Evaluation Section should be used as the Calibration Area. Read the entire page →
From page 111... ... 7.5.3 verification of roller mv repeatability and gpS position reporting Roller MVs must be repeatable (i.e., repeated Measurement Passes over the same, fully compacted material must exhibit similar magnitudes and trends) Read the entire page →
From page 112... ... ter. This can also be accomplished by establishing a marker of known position on the ground and approaching the marker with the roller from different directions. Read the entire page →
From page 113... ... An important premise of Option 1 is that there is a positive correlation between Roller MV and soil compaction (i.e., the lowest Roller MVs correspond to lowest compaction) Read the entire page →
From page 114... ... % – – – ∆MV MV MV MVi i i i = ×1 1 100 (7.3) This spatial analysis involves transforming the Roller MV data onto a fixed grid for direct comparison. Read the entire page →
From page 115... ... achieving the MV-TV over a specified proportion or percent area threshold of the Evaluation Section. The range of recommended proportions is 80% to 95% and should be defined prior to testing. Read the entire page →
From page 116... ... Figure 7.9. Determination of MV-TV via Option 3a. Read the entire page →
From page 117... ... 7.8.3 determination of mv-Tv for Qa option 3c: relating roller mv to labdetermined properties In this approach the MV-TV is established through empirical correlation to laboratory-determined engineering properties (e.g., M r ) based on a preselected combination of moisture contents and dry unit weights. Read the entire page →
From page 118... ... Figure 7.12. Determination of MV-TV via Option 3c. Read the entire page →

From page 104...

... 0 Quality assurance of Pavement Earthwork Using Roller-integrated Continuous Compaction Control (Recommended specification options) 4 into viable performance-based specifications that can be efficiently implemented in practice.