Effective with the December 2018 Letting 128 2019 Standard Spec ifications Section 312 Select Crushed Material
312.1 Description
1.This section describes providi ng select crushed material used primarily for subgrade correction and improvement.
312.2 Materials
1.Furnish crushed stone or crushed concrete from a department-approved source sub stantially free of unconsolidated overburden materials, topsoil, organic materials, steel, and other deleterious materials.
2.A department-approved source is a source with acceptable depar tment test results for wear and soundness on record. The engineer may also approve other sources as follows: 1. Mined or quarried waste rock that, in the engineer's opinio n, is hard, durable, and when processed through a primary crusher, will produce a material similar in size and texture to that produced from a quarry face. 2. Crushed concrete that the engi neer judges substantially free of steel, building materials or other deleterious material; and when p rocessed through a primary crus her produces a material similar in size and texture to that produ ced from a quarry face.
3.The engineer may reject material produced from deteriorated co ncrete or from non-durable rock such as sandstone, shale, slate, disintegrated granite, or heavily w eathered rock.
4.Conform to the following gradation: SIEVE PERCENT PASSING (by weight) 5-inch 90 - 100 1 1/2-inch 20 - 50 No. 10 0 - 10
5.Furnish material that has a m inimum of 50 percent, by count, o f the number of particles retained on the 1 1/2-inch sieve with at least 2 fractured faces.
6.The department will assess selec t crushed material acceptabili ty based primarily on the engineer's visual inspection. The departmen t may also test for gradation o r fracture.
312.3 Construction
1.Place select crushed material where the plans show or as the e ngineer directs. Ens ure that there is adequate moisture in the aggre gate during placing, shaping, and compacting to prevent segregation and achieve adequate compaction.
2.Spread and compact select crushed material in compacted layers of 16-inches or less. The engineer may allow thicker layers to address soft foundation conditions. Compact select crushed material using standard compaction conforming to 301.3.4.2 .
312.4 Measurement
1.The department will measure the Select Crushed Material bid it ems by the ton or cubic yard acceptably completed. 312.5 Payment
1.The department will pay for measured quantities at the contrac t unit price under the following bid items: ITEM NUMBER DESCRIPTION UNIT 312.0110 Select Crushed Material TON 312.0115 Select Crushed Material CY
2.Payment for Select Crushed Material is full compensation for p roviding select crushed material. 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.
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Source: Wisconsin Standard Specifications for Highway and Structure Construction, 2019 Edition. Pages 137–137 of 601. View official source ↗