Wisconsin WisDOT Standard Specifications (within FDM) — Section 315

Effective with the December 2018 Letting 130 2019 Standard Spec ifications Section 315 Asphaltic Base

315.1Description

(1)This section describes constru cting a plant mixed asphaltic base for overlaying with new pavement.

315.2Materials

(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 surface in 465.

315.3Construction

315.3.1 General

(1)Conform to the general requirements 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.

315.4Measurement

(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 providing and placing the mixture, including reclaime d asphalt; and for compacting the mixture.

(3)Payment for Asphaltic Base Widening 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

320.1Description

(1)This section describes constructing a concrete base for overla ying with new pavement.

320.2Materials

(1)Furnish materials as specified 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.

320.3Construction

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

(1)Consolidate and finish as spec ified for concrete pavement unde r 415.3 , except the engineer will not

require tining under 415.3.8.3 , or surface testing and correction under 415.3.10.

(2)Cure concrete base as speci fied for concrete pavement in 415.3.12 . Use wax-based curing compound

conforming to 501.2.9 . 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 joints 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 .

320.4Measurement

(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 unhardened 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 .

Source: Wisconsin Standard Specifications for Highway and Structure Construction, 2019 Edition. Pages 139–139 of 601.

← Previous

313 Pit Run

320 Concrete Base