311.05 Processing Existing Base and Surface
192 SECTION 311
311.01 Description
This work consists of removing, processing, reusing, or disposing of existing aggregate surface course, base course, or asphalt surface.
311.02 Materials — Vacant
311.03 Equipment — Vacant
311.04 Construction Methods
Loosen or scarify the aggregate or other material to its full depth and width. Break aggregate or asphalt into pieces that will pass a 3 in [75 mm] sieve. Place the materials in windrows on the subgrade or shoulder. Avoid contamination of base or surface material due to exce ss soil or other foreign material. The Department will not pay for the costs of reworking damaged or contaminated material. Compact processed material used for base courses, shoulders, and drives in Method B, Method C, and Method D to at least 95 percent of maximum density in accordance with AASHTO T 99.
A.Method A —For Salvage and Stockpiling Prepare storage area by removing grass, weeds, and other waste before stockpiling material. Avoid the addition of excess amounts of soil or other foreign material, which would render it unusable. Load and haul the processed material to storage locations shown on the Plans.
B.Method B —For Use in Subgrade Place processed material in windrows on the shoulder during shaping and conditioning the subgrade. After complet ing the subgrade, spread the processed material uniformly over the width of the section and compact with the subgrade.
C.Method C —For Use as Subbase Spread the processed material evenly on the previously shaped, conditioned, and compacted subgrade and co mpact.
D.Method D —For Use in New Base Courses, Shoulders, or Drives Place the processed material on the completed subgrade as a base course, shoulder, or drive, or blend uniformly with new material for any course. Obtain approval by the Resident Engineer before using processed material.
311.05 Method of Measuremen T
The Resident Engineer will measure Processing Existing Base and Surface, Method A , Method B , Method C , and Method D along the centerline to the nearest foot [meter]. CEMENT TREATED BASE 317.03
311.06 Basis of Payment
The Department will pay for each pay item at the contract unit price per the specified pay unit as follows: Pay Item: Pay Unit:
A.PROCESSING EXISTING BASE AND SURFACE, METHOD A Linear Foot [Meter]
B.PROCESSING EXISTING BASE AND SURFACE, METHOD B Linear Foot [Meter]
C.PROCESSING EXISTING BASE AND SURFACE, METHOD C Linear Foot [Meter]
D.PROCESSING EXISTING BASE AND SURFACE, METHOD D Linear Foot [Meter] SECTION 317 CEMENT TREATED BASE
317.01 Description
This work consists of constructing a cement treated base (CTB) using a soil, aggregate, and cement mixture.
317.02 Materials
Provide material in accordance with the following subsections: Material: Subsection: Portland Cement 701.02 Water 701.04 Fly Ash 702.01 Curing Agents 701.07.C Aggregates 703.02 Geotextiles for Bond Breakers 712.1 Provide aggregates that conform to the requirements of Subsection 703.02 , except ensure that the aggregate has an Aggregate Durability Index of at least 30, tested in accordance with AASHTO T 210.
317.03 Equipment
Use equipment for producing and placing the CTB in accordance with Subsection 301.03, “Equipment,” except, only use stationary plants and equipment that combines placement and initial compaction.
Source: Oklahoma Standard Specifications for Highway Construction, 2019 Edition. Pages 206–206 of 935.