Effective with the December 2018 Letting 137 2019 Standard Spec ifications Section 340 Cracked and Seated Pavement
340.1 Description
1.This section describes cracking and seating existing concrete pavement to create a stable construction platform for a pavement overlay.
340.2 (Vacant)
340.3 Construction 340.3.1 Equipment
1.Use a spade or guillotine type breaker mounted on a vehicle an d capable of controlled forward and transverse movement. The breaker must be capable of exerting a minimum of 12,000 foot-pounds of energy.
2.Use 10-ton or heavier vibrator y rollers operated at an enginee r-approved frequency and amplitude.
340.3.2 Cracking and Seating
1.Crack the pavement full depth while maintaining aggregate inte rlock between the pieces. Do not unduly displace the concrete; damage drainage facilities, utili ties, or other property; or destabilize the base or subgrade.
2.Crack concrete uniformly acros s the pavement width into pieces approximately 4 to 8 square feet in area and having their maximum di mension transverse to the pavem ent centerline. Do not crack concrete within 2 feet of transve rse joints, or at other locati ons designated by the contract or engineer.
3.Roll the cracked surface to firmly seat the cracked pieces and produce an even surface. Clean the surface of the cracked and s eated pavement before opening to tr affic and again just before placing the asphaltic leveling co urse. Remove dust, dirt, debris, or other foreign or loose material.
340.4 Measurement
1.The department will measure Cracking and Seating by the square yard acceptably completed.
340.5 Payment
1.The department will pay for the measured quantity at the contr act unit price under the following bid item: ITEM NUMBER DESCRIPTION UNIT 340.0100 Cracking and Seating SY
2.Payment is full compensation for cracking, rolling, and cleani ng the concrete pavement. Effective with the December 2018 Letting 138 2019 Standard Spec ifications Section 350 Subbase
350.1 Description
1.This section describes constru cting a granular subbase on the prepared subgrade.
350.2 Materials
1.Conform to 209.2 for granular backfill, except ensure that the maximum dimensio n of a particle does not exceed 3/4 of the compacted thickness of any individual layer being placed.
350.3 Construction
350.3.1 General
1.Do not place loam, clay, silt, o r similar soil materials on the subbase surface or incorporate into the subbase. With the engineer's approval, the contra ctor may use c ement, fly ash, lime, or similar engineer-approved materials to stabilize the subbase.
2.If the contract speci fies both a subbase and a flexible base, and constructing the subbase in multiple layers, construct successive layers in the sequence and at the times the engineer directs. The engineer will phase that construction to provide a usable surfa ce for traffic.
350.3.2 Preparing Subgrade
1.Prepare and maintain the subgrade as specified for preparing t he foundation for non-rigid base under 211. Excavate and backf ill areas of soft, yielding, or spongy subg rade or otherwise treat unstable areas as the engineer directs.
350.3.3 Constructing Subbase
1.Place granular subbase on the prepared subgrade in a way that minimizes contamination with the subgrade material. Do not place s ubbase material on a frozen su bgrade, subgrade covered by ice or snow, or on a wet or soft subgrade unless the engineer specific ally directs.
3.Place, shape, and compact the s ubbase to the lines, grades, an d section the contract specifies. Maintain the finished subbase unt il it is covered, or until the engineer accepts the work if the contract does not require covering the subbase.
350.4 Measurement
350.4.1 General
1.The department will measure the Su bbase bid items by the cubic yard, the ton, or the square yard acceptably completed. 350.4.2 By Volume
1.For material measured by the cubic yard, the department will c ompute the volume of material in its original source position using one of the following methods: - Average end areas, with no correction for curvature. - Truncated prisms.
2.The department will measure the or iginal volume after the cont ractor strips or otherwise prepares the deposit. Notify the engineer before removing subbase material. The department will not measure material removed before the engineer measures the original volu me.
3.For small quantities, the depar tment may elect to determine th e volume in the vehicle. The engineer will determine the capacity of each vehicle used to the nearest 1/10 cubic yard.
350.4.3 By Weight
1.For measurement by the ton, the department will determine weig ht based on contractor-provided tickets submitted daily. Submit a ticket for each load showing the material, net weight, date, and project ID. For material with mor e than 7 percent moisture, the department will reduce the ticket weight by the weight of water exceeding 7 percent. The department will determine moisture content as a percent of dry weight.
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Source: Wisconsin Standard Specifications for Highway and Structure Construction, 2019 Edition. Pages 146–146 of 601. View official source ↗