Effective with the December 2018 Letting 129 2019 Standard Spec ifications Section 313 Pit Run
313.1 Description
1.This section describes providing pit run material used primarily for subgrade correction and improvement.
313.2 Materials
1.Furnish a homogenous mixture of naturally occurring material that has at least 50 percent by weight retained on the 1 1/2 sieve, wit h the remaining material compos ed of sand with a nominal quantity of silt/clay. The maximum size of an individual piece cannot be mo re that 2/3 of the specified individual layer thickness. Obtain material from a department-approved sou rce substantially free of topsoil, organic materials, and other deleterious materials.
2.A department-approved source i s a pit with acceptable departme nt test results for wear and soundness on record. The engineer may also approve other sources conforming to the following criteria: 1. The deposit is of suitable te xture and composition to produ ce crushed and graded aggregates that, in the engineer’s judgem ent, conform to 313.2(1) . 2. The material in the deposit, in the engin eer’s judgement, i s sound, hard, and durable.
3.The department will assess pit run acceptability based primarily on the engineer's visual inspection. The engineer may reject material produced from any pit with exc essive non-durable rock such as sandstone, shale, slate, disintegrated granite, or heavily weathered rock.
313.3 Construction
1.Place pit run where the plans show or as the engineer directs. Ensure that there is adequate moisture in the aggregate during placing, shaping, and compacting to pre vent segregation and achieve adequate compaction.
2.Spread and compact pit run in co mpacted layers of 16-inches or less. The engineer may allow thicker layers to address so ft foundation conditions . Compact pit run u sing standard compaction conforming to 301.3.4.2 .
313.4 Measurement
1.The department will measure the Pi t Run bid items by the ton o r cubic yard acceptably completed.
313.5 Payment
1.The department will pay for measured quantities at the contrac t unit price under the following bid items: ITEM NUMBER DESCRIPTION UNIT 313.0110 Pit Run TON 313.0115 Pit Run CY
2.Payment for Pit Run is full comp ensation for providing pit run material. If the contractor substitutes 3- inch base, breaker run, or select crushed material for pit run as allowed under 313.2 , the department will pay for that material at the Pit Run unit price. 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.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.
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Source: Wisconsin Standard Specifications for Highway and Structure Construction, 2019 Edition. Pages 138–138 of 601. View official source ↗