Download - Spot Compaction Methods - CEAM
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� Spot Compaction MethodsDefaults Test Methods for:
� Non – Granular Subgrade
� Granular Subgrade
� Base
� Drainable Base
� Shouldering Material
� Acceptable Alternative Methods (Quality Compaction or LWD)
� Full Coverage Compaction Methods� Test Rolling
� Intelligent Compaction
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Defaults Spot Test Methods for:� Non – Granular Subgrade
Specified Density – Proctor
Optimum Moisture
Maximum Density (Target)
Compaction Compliance
Sand Cone
Nuclear Density Gauge
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Reasons for change� Vast majority of States, and private work allows for the device.
� Requested by local agencies.� Quick Results� ASTM and AASHTO Standards� Federal Approval� CO Safety Office procedures� Upped Testing Rate in Trenches for 2014
� Requirements for projects let in 2015 Certified by AASHTO Materials Reference Laboratory (AMRL)
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Defaults Spot Test Methods for Granular Subgrade & Base
Dynamic Cone Penetrometer (DCP)
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Defaults Test Methods for Surfacing Aggregate and Drainable Aggregate Base
Quality Compaction
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Quality Compaction or Light Weight Deflectometer may be substituted by Special provision for specified density or DCP
Still need Proctor for optimum moisture on non-granular material.
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1) Review/Revise & place LWD procedure into the grading and base manual.
2) Place LWD as an option within the 2105/2106, and 2211 specifications, Schedule of Materials Control, & Independent Assurance requirements
3) Follow our current specification that requires the LWD yearly calibration per ASTM Standard E2835, and require proof (documentation) during IA review.
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Quality Compaction Compact each lift until there is no further evidence of consolidation during compaction.
Add no evidence of (Ohio DOT):� Pumping – vertical displacement of the top surface of the
compacted layer, not directly under the vehicle tire. � Reaction – a movement back to a former or less advance condition. � Yielding – giving under pressure flexible.� Cracking – cracking of material on visible surface � Lateral movement – No lateral movement allowed
� Additionally all other compaction requirements must meet quality compaction
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� Added Tandem – Now Test roller 30 and 10
� Standard for TR 10
� total weight for front axle,
� tires,
� deflection
� included quality compaction language
� Currently using feeler gauges on both, but researching using a laser/GPS for Test Roller 10.
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Developing/Evaluation/Researching
Contact Rebecca Embacher for information and Special Provisions
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� Four projects in 2014
� Transferring Responsibility to Contractor
� Gathering information/evaluating from this and next year’s projects
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� Moistures
� Aggregate Qualities
� Gradations
� Compaction
If interested contact me for special provisions.
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Revise G&B Manual (online and dated) each year.
Contact me to get on email update list.
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Le finis