Revisions and Additions History of revisions and additions to standards for the 2012 and 2018 Standard Specifications.

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Dtl/Provision #	Standard Name	New/Revised	Effective Date	Standard Type	Summary of Changes
SP05 R008	Aggregate Subgrade	New	5/15/2018	Provision	Designates current aggregate subgrade in Section 505 as a Type 1 Aggregate Subgrade and adds a Type 2 Aggregate Subgrade Includes thickness, proofrolling, compaction and undercutting requirements for each aggregate subgrade type
SP05 R017	Class IV Subgrade Stabilization in Lieu of Chemical Stabilization	Revised	5/15/2018	Provision	Adds proofrolling requirement and aggregate subgrade type for Class IV Subgrade Stabilization
	Geotechnical Summary Tables	Revised	5/15/2018	Form	Revises Summary of Aggregate Subgrade/Stabilization table to accommodate both aggregate subgrade types
7	Geotextile for Pavement Stabilization	Revised	5/15/2018	Provision	Adds proofrolling requirement and aggregate subgrade type for Class IV Subgrade Stabilization
SP04 R002B	Alternate Bridge Approach Fills for Integral Abutments	New	1/16/2018	Provision	Addresses new bridge approach fill for integral abutments (2018 Roadway Standard Drawing No. 422.03) Includes Contractor's option for new Type A Alternate Approach Fill for Integral Abutments
SP04 R002A	Bridge Approach Fills	Revised	1/16/2018	Provision	Addresses new bridge approach fills (2018 Roadway Standard Drawing No. 422.01 and 422.02 and Roadway Detail Drawing No. 422D10) Includes 3 new bridge approach fill types (Type I Standard Approach Fill, Type II Modified Approach Fill and Type III Reinforced Approach Fill for MSE Abutments)
SP05 R017	Class IV Subgrade Stabilization in Lieu of Chemical Stabilization	Revised	1/16/2018	Provision	Adds substitution is not allowed for chemically stabilized sections with geotextile for pavement stabilization Makes minor updates for 2018 Standard Specifications
16	Compaction Grouting	New	1/16/2018	Provision	Addresses compaction grouting to stabilize subgrades and embankments and prevent future subsidence Requires the use of a prequalified Subsurface Grouting Contractor Pays for compaction grouting in cubic feet of grout pumped and linear feet of grout pipe installed
SP09 R005	Foundations and Anchor Rod Assemblies for Metal Poles	Revised	1/16/2018	Provision	Adds standard foundation for light standards Makes minor updates for 2018 Standard Specifications
	Geotechnical Design Cell Library	New	1/16/2018	Cell	Removes Standard Embankment Monitoring and Rock Plating Details because these details are Roadway Standard Drawings No. 235.01 and 275.01, respectively, in the 2018 Roadway Standard Drawings Revises Standard CIP and Segmental Gravity Wall Detail Nos. and CIP, Segmental and Precast Gravity Wall Cells and Notes because these wall types are Sections 453, 454 and 455, respectively, in the 2018 Standard Specifications Revises Notes for the Concrete Barrier Rail with Moment Slab Cell because barrier rails with moment slabs are incorporated into Section 460 in the 2018 Standard Specifications Revises Soldier Pile Wall Cell and Note because Section 442 is rewritten in the 2018 Standard Specifications Revises MSE Wall Notes and MSE Abutment Wall Cells because bridge approach fill details and provisions will be significantly changed for 2018 lettings
	Geotechnical Summary Tables	Revised	1/16/2018	Form	Revises footnote for Summary of Aggregate Subgrade/Stabilization table Adds Class IV Subgrade Stabilization to Summary of Geotextile for Pavement Stabilization table
7	Geotextile for Pavement Stabilization	Revised	1/16/2018	Provision	Adds Class IV Subgrade Stabilization over Geotextile for Pavement Stabilization for pavement sections with asphalt base or surface course Makes minor updates for 2018 Standard Specifications
4	MSE Retaining Walls (LRFD)	Revised	1/16/2018	Provision	Revises provision for new Type III Reinforced Approach Fill for MSE Abutments Removes restriction for 57 stone with geosynthetic reinforcement since Geogrid Evaluation Program includes full scale damage testing from NTPEP Evaluations Makes minor updates for 2018 Standard Specifications
8,9	Reinforced Soil Slopes, Cellular Confinement Systems	Revised	1/16/2018	Provision	Makes minor updates for 2018 Standard Specifications and other Department changes Revises material requirements for geocell tendons and crest anchorages Expands and further defines design requirements for cellular confinement systems
SP14 R004	Roadway Lighting Foundations	New	1/16/2018	Provision	Combines 2012 Roadway Standard Provision "High Mount Foundations" with Section 1405 "Standard Foundation" that was removed from the 2018 Standard Specifications Addresses High Mount Foundation (2018 Roadway Standard Drawing No. 1402.01) and Standard Foundation (2018 Roadway Standard Drawing No. 1405.01)
	Standard Foundation Notes (LRFD)	Revised	1/1/2018	Notes	Adds new note for MSE abutment walls Updates notes for 2018 Standard Specifications
	Summary of Quantities Worksheet	Revised	11/29/2017	Form	Updates pay item information for 2018 Standard Specifications and Special Provisions Adds Class IV Subgrade Stabilization for geotextile for pavement stabilization
3,9,10	Anchored Retaining Walls (LRFD), Soil Nail Retaining Walls (LFD-ASD), Soldier Pile Retaining Walls (LRFD)	Revised	5/16/2017	Provision	Revises materials for most recent Geosynthetics (Section 1056) Provision Updates geocomposite drains for most recent Geosynthetics (Section 1056) Provision
	Anchored, Soil Nail and Soldier Pile Wall Typicals	Revised	5/16/2017	Cell	Updates geocomposite drains for most recent Geosynthetics (Section 1056) Provision
	Drilled Piers (LRFD)	Revised	5/16/2017	Provision	Replaces Table 411-3 from the Standard Specifications with specific polymer slurry requirements for each approved polymer Adds exception to method of measurement for SPT testing
6	MSE Retaining Walls (LRFD)	Revised	5/16/2017	Provision	Clarifies and improves wording Adds electrochemical testing requirements for coarse aggregate from coastal plain sources Adds exceptions to FHWA requirements for rubber bearing pads Adds minimum gauge thickness for steel strip reinforcement Adds aluminized coating as an option for steel strip reinforcement Removes geostrips Replaces prequalification with other requirements for engineers designing MSE panel walls Addresses gap between concrete barrier and MSE wall facing Adds corrugated steel pipes for pile sleeves Adds polypropylene geogrid reinforcement for MSE abutment walls with polyester type (PET) geogrid reinforcement connected to SRW units Adds materials for PET geogrid reinforcement vertical obstruction detail
	MSE Wall Typicals and Details	New	5/16/2017	Cell	Adds 2 new abutment wall cells with pile sleeves Adds polypropylene geogrid reinforcement to abutment wall cells for MSE abutment walls with polyester type (PET) geogrid reinforcement connected to SRW units Adds geogrid cap connection detail to MSE abutment wall with SRW units cells Adds a new cell for PET geogrid obstruction details for MSE segmental walls and moves leveling pad detail for SRW units to this cell
	Piles (LRFD)	Revised	5/16/2017	Provision	Adds requirement for when to use AASHTO driving stress limits for severe corrosive environments Adds new pile driving equipment setup pay items
7,8,10	Precast Gravity Retaining Walls (LRFD), Segmental Gravity Retaining Walls (LRFD), Soldier Pile Retaining Walls (LRFD)	Revised	5/16/2017	Provision	Addresses gap between concrete barrier and wall facing
	Precast Gravity, Segmental Gravity and Soldier Pile Wall Typicals	Revised	5/16/2017	Cell	Addresses gap between concrete barrier and wall facing
453.01	Standard CIP Gravity Retaining Wall	Revised	5/16/2017	Detail	Adds label to top of footing for payment purposes
	Standard MSE Wall Notes	Revised	5/16/2017	Notes	Adds new pile sleeve notes
	Geotechnical Design Cell Library	Revised	1/20/2017	Cell	Adds a new cell for private engineering box (PEF) insert Updates borders and cells for PEF box placeholder location Makes all notes in cells independent of each other to make drafting easier and adds note placeholders that do not print
	Geotechnical Cell Library	New	9/20/2016	Cell	Adds a new cell for a private engineering box (PEF) insert Adds a new supplemental legend for Geological Strength Index (GSI) Tables for both 11x17 & 8.5x11 sheets Updates title sheets for PEF box placeholder location and index lists for GSI supplemental legend Revises Appendix Cover Sheet to be both an Appendix Cover Sheet and a Divider Sheet for separate PDF files
20,21	Slab Jacking, Polyurethanes	New	9/20/2016	Provision	Addresses slab jacking with cementitious grout and polyurethane foam Requires the use of a prequalified Subsurface Grouting Contractor Pays for slab jacking in square feet of slab raised but also includes estimated quantities of grout and foam for bidding purposes Addresses polyurethane foam materials for slab jacking, void filling, leak sealing, permeation grouting, subgrade stabilization and other applications Specifies 3 types of polyurethane with various components and properties Requires the use of an approved foam from the Approved Products List based on polyurethane type

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Revisions and Additions History of revisions and additions to standards for the 2012 and 2018 Standard Specifications.

NCDOT Geotech Alerts

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