Effective with the December 2018 Letting 130 2019 Standard Spec ifications Section 315 Asphaltic Base
315.1 Description
1.This section describes constru cting a plant mixed asphaltic base for overlaying with new pavement.
315.2 Materials
1.Furnish one-inch nominal size aggregate graded as specified in 460.2.2.3 and conform to the other material and mixture requirements specified for asphaltic surfa ce in 465.
315.3 Construction
315.3.1 General
1.Conform to the general requirement s for asphaltic pavements sp ecified in 450, except as modified here in 315.3. Place the mixture in 4-inch or thinner compacted layers unless the engineer directs otherwise. 315.3.2 Asphaltic Base Widening
1.Excavate and widen the existing shoulder to accommodate the ba se widening. After placing the asphaltic base, reconstruct the shoulder and slope to the grade and cross-section the plans show. Unless the engineer directs other wise, reconstruct using the pr eviously excavated material. Dispose of unused material as specified in 205.3.12 .
2.Prepare the foundation for the asphaltic base mixture as speci fied in 211. If the width of the base widening precludes using trench rollers and other conventional equipment, prepare and compact the foundation using engineer- approved hand methods.
3.Place the mixture to the thic kness of the existing abutting pa vement, including the existing asphaltic surfacing, unless the contract specifies otherwise. Construct i n successive layers until the top surface is flush with the adjacent pavement surface. Before allowing th e asphaltic mixture to cool; place, spread, strike off, and compact the material.
4.The engineer may allow other spr eading and compacting methods and equipment if the width of the base widening precludes using the equipment specified in 450.
315.4 Measurement
1.The department will measure Asphaltic Base and Asphaltic Base Widening by the ton acceptably completed as specified for asphaltic pavement in 450.4 .
2.The department will not measure asphaltic materials, required for and incorporated in the mixture, separately. 315.5 Payment
1.The department will pay for measured quantities at the contrac t unit price under the following bid items: ITEM NUMBER DESCRIPTION UNIT 315.0100 Asphaltic Base TON 315.0200 Asphaltic Base Widening TON
2.Payment is full compensation fo r preparing the foundation; for providing an asphaltic base mixture design, when required; for provid ing and placing the mixture, including reclaime d asphalt; and for compacting the mixture.
3.Payment for Asphaltic Base Widen ing also includes excavating, reconstructing earth shoulders, and disposing of surplus or unsuitable excavated material. Effective with the December 2018 Letting 131 2019 Standard Spec ifications Section 320 Concrete Base
320.1 Description
1.This section describes construct ing a concrete base for overla ying with new pavement.
320.2 Materials
1.Furnish materials as specifi ed for concrete pavement under 415 except use grade B, B-FA, B-S, B-IS, B-IP, or B-IT concrete as specified in 501. Provide QMP for class II ancilla ry concrete as specified in 716.
320.3 Construction
320.3.1 General
1.Construct as specified for concrete pavement under 415 except as modified here in 320.3.
320.3.1 1 Consolidating, Finishing, and Curing
320.3.1 2 Opening Concrete to Traffic
1.Conform to the procedures and op ening criteria specified for g rade A concrete used in concrete pavement under 415.3.15. If the contractor prevents l oading within 6 inches of a free edge or an edge abutting aggregate: 1. The engineer will allow the contractor to open to traffic when the concrete reaches 2000 psi. 2. In the absence of compressive strength information, the eng ineer may allow the contractor to open to traffic after 3 equivalent curing days expire.
320.3.1 3 Thickness Tolerance
1.The engineer will not require the contractor to conform to the tolerance in pavement thickness provisions specified for concrete pavement under 415.3.16.
320.3.2 Concrete Base
320.3.2 1 General
1.Construct as a single layer on a prepared foundation to the th ickness the plans show. Prepare the foundation as specified in 211.
320.3.2 2 Joints
1.Provide transverse joints as t he plans show or the engineer directs.
2.Locate longitudinal joints as the plans show. If the plans do not show the joint locations, provide longitudinal joints on the centerline for 2-lane concrete base or at the edges of the traffic lanes parallel to the centerline of the roadway for multilane concrete base.
3.Construct longitudinal joint s as the plans show. If the plans do not show construction details, install 1/2-inch diameter or larger tie bars, 24 inches long or longer, at 3 foot spacing.
4.Saw, form, or tool contraction jo ints as specified for transve rse joints in concrete pavement under
415.3.7 .
320.4 Measurement
1.The department will measure the bid items under this section b y the square yard acceptably completed. The department will m easure fillets for widened sections or fillets at drain basins and similar locations if placed mono lithic with the concrete base. The department will no t deduct for fixtures located within the limits of the concrete base. 320.5 Payment
1.The department will pay for measured quantities at the contrac t unit price under the following bid items: ITEM NUMBER DESCRIPTION UNIT 320.0100 - 0199 Concrete Base (inch) SY 320.0300 - 0399 Concrete Base HES (inch) SY
2.Payment for bid items under this section is full compensation for providing curing, and protecting concrete; and for providing tie bars and dowel bars in unharden ed concrete. For tie bars and dowel bars provided in concrete not p laced under the contract, the department will pay sep arately under the Drilled Tie Bars and Drilled Dowe l Bars bid items as specified in 416.5 .
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Source: Wisconsin Standard Specifications for Highway and Structure Construction, 2019 Edition. Pages 139–139 of 601. View official source ↗