Wisconsin WisDOT Standard Specifications (within FDM) — Section 310

Effective with the December 2018 Letting 126 2019 Standard Spec ifications Section 310 Open-Graded Base

310.1Description

(1)This section describes constru cting open-graded base course us ing crushed stone, crushed gravel, or

both.

310.2Materials

(1)Furnish crushed stone or c rushed gravel conforming to 301.2 , except for gradation. Provide QMP for

open-graded base as specified in 730. For gradation conform to the following: SIEVE PERCENT PASSING (by weight) 1-inch 90 - 100 3/8-inch 45 - 65 No. 4 15 - 45 No. 10 0 - 20 No. 40 0 - 10 No. 200 0 - 5.0

(2)The contractor may substitute material conforming to the gradation requirements specified for size No.

1 coarse aggregate in 501.2.5.4.4 if that material conforms to the fracture requirements for ope n- graded crushed gravel specified in 301.2.4.5 .

(3)Do not place reclaimed asphalt, reprocessed ma terial, or blended materials below open-graded base

unless the contract specifies o r the engineer allows in writing .

310.3Construction

(1)Construct open-graded base conforming to 301.3 . Use standard compaction conforming to 301.3.4.2 .

(2)Compact in layers using the equipment specified in 301.3.1 . If using a pneumatic roller, do not exceed

a compacted thickness of 6 inc hes per layer. If using a vibrato ry roller, do not exceed a compacted thickness of 8 inc hes per layer.

(3)Load and carry forward, or other wise remove, excess material p roduced during trimming operations to

prevent contamination of the dense-graded material in the shoul der area.

310.4Measurement

(1)The department will measure Base Aggregate Open-Graded by the ton or cubic yard acceptably

completed. The department may deduct for contaminated aggregate or unrecovered aggregate deposited outside the outer shoulder limits. 310.5 Payment

(1)The department will pay for measured quantities at the contrac t unit price under the following bid

items: ITEM NUMBER DESCRIPTION UNIT

310.0110 Base Aggregate Open-Graded TON

15 Base Aggregate Open-Graded CY

(2)Payment for Base Aggregate O pen-Graded is full compensation fo r preparing the foundation; and for

stockpiling, placing, shaping, compacting, and maintaining the base.

Effective with the December 2018 Letting 127 2019 Standard Spec ifications Section 311 Breaker Run

311.1Description

(1)This section describes providing breaker run used primarily fo r subgrade correction and improvement.

311.2Materials

(1)Furnish stone or concrete processed through a primary crusher set to produce material predominantly

6 inches or less in a t least one dimension, and which is not fu rther screened or crushed. Obtain material from a department-approved source substantially free o f unconsolidated overburden materials, topsoil, organic mate rials, steel, and other deleter ious materials.

(2)A department-approved source is a quarry 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.Concrete that the engineer judges substantially free of ste el, building materials or other deleterious

material; and when processed through a primary crusher, produces a material similar in size and texture to that produced from a quarry face.

(3)The department will assess breaker run a cceptability based pri marily on the engineer’s visual

inspection. The engineer may rejec t material produced from dete riorated concrete or from non-durable rock such as sandstone, shale, s late, disintegrated granite, or heavily weathered rock.

(4)The contractor may sub stitute select crushed material conforming to 312.2 for breaker run.

311.3Construction

(1)Place breaker 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 prevent segregation and achieve adequate compaction.

(2)Spread and compact breaker run in compacted layers of 16-inches or less. The engineer may allow

thicker layers to address soft f oundation conditions. Compact b reaker run using standard compaction conforming to 301.3.4.2 .

311.4Measurement

(1)The department will measure the Br eaker Run bid items by the ton or cubic yard acceptably

completed.

311.5Payment

(1)The department will pay for measured quantities at the contrac t unit price under the following bid

items: ITEM NUMBER DESCRIPTION UNIT

311.0110 Breaker Run TON

15 Breaker Run CY

(2)Payment for Breaker Run is full compensation for providing bre aker run. If the contractor substitutes

select crushed material for br eaker run as allowed under 311.2, the department will pay for that material at the Breaker Run unit price.

Source: Wisconsin Standard Specifications for Highway and Structure Construction, 2019 Edition. Pages 135–135 of 601.

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