Non-Nuclear Methods for Compaction Control of Unbound Materials (2014) / Chapter Skim
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Pages 105-110
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From page 105... ...
106 chapter six CONCLUSIONS INTRODUCTION For this report, all available knowledge and information from a variety of sources on various non-nuclear devices and methods that have been used for compaction control of unbound materials were compiled and summarized. Included were non- nuclear devices that measure density, as well as those that evaluate in situ stiffness- and strength-related properties of unbound materials.
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From page 106... ...
107 has the ability to measure it. The Briaud compaction device (BCD)
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108 Features BCD CH DCP GeoGauge LWD PSPA SCS ASTM standard None D5874 D6951 ASTM 6758 E2583 None None Measurement Modulus CIV DPI Modulus Modulus Modulus Compaction indicator Moisture measurement No Yes No No No No No Calibration of device UC test and BCD test on rubber blocks Laboratory testing in Proctor mold None Calibration plate Required Laboratory stiffness testing Preset system Portability Good Medium Good Good Medium Medium Good Durability N/A Poor Good Good Good Good Box -- good Sensors -- fair Ease of use/training Easy -- minimal Easy -- minimal Easy -- minimal Easy -- minimal Moderate Moderate Easy -- minimal Initial cost Not available $2,500 $1,000 $5,000–$5,500 $8,000–$15,000 $30,000 About $1,650 Data storage Yes Yes No Yes Yes Yes Yes Influence depth (inch) About 6 10–12 48 5–8 11 (1–1.5 D)
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109 Parameter Device Correlations Reference Soil Type Clegg Hammer CBR CBR = 0.07 (CIV) 2 Clegg (1980)
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110 contractors' unfamiliarity with stiffness- and strength-based specifications. Only the Indiana and Minnesota DOTs have widely implemented stiffness- and strength-based specifications, and both use the DCP and LWD in those specifications.
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From page 110... ...
111 (ICMVs) and spot in situ tests (particularly DCP and LWD)
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