for Highway Construction Page 550 of 71 5 SECTION 631 – RUMBLE STRIPS
631.01 Description.
Construct rumble strips.
631.02 Materials.
Provide materials as specified in: Fog Coat ....................................................................................................................................... 408 Emulsified Asphalts ................................................................................................................. 702.03 Provide CSS -1 or CSS -1H diluted emulsified asphalt for the fog coat .
631.03 Construction Requirements.
Construct a 500- foot rumble strip test section within the project site for approval before proceeding. Limit the longitudinal rumble strip deviati on to less than 2 inches per 100 feet. Remove debris and apply fog coat as specified in 408. When applicable, remove and dispose of debris before opening adjacent lane to traffic. When rumble strips are installed under pavement markings, place 1 application of temporary pavement markings, construct and fog coat rumble strips, then place 2 applications of pavement markings as specified in 630.
631.04 Method of Measurement.
The Engineer will measure acceptably completed rumble strips by the mile.
631.05 Basis of Payment .
The Department will pay for accepted work as follows: Pay Item Pay Unit Rumble Strips ......................................................................................... Mile Debris removal, waste disposal, and emulsified asphalt are incidental to rumble strip installation. Rumble strips that deviate 2 inches or greater longitudinally from the initial marking will be paid at 50 percent of the unit price for the length of the deviation. Deviations of 4 inches or greater longitudinally from the mar king will be paid at 0 percent of the unit price for the length of the deviation. The length of the deviation will be measured to the nearest foot. The first application of pavement markings will be paid for as temporary pavement markings as specified in 626. The permanent pavement markings will be paid as specified in 630. for Highway Construction Page 551 of 715 SECTION 632 – REMOVAL OF BRIDGE DECK CONCRETE
632.01 Description.
Remove defective concrete and/or contaminated concrete from the upper portions of bridge deck s as specified. Removal does not include full depth deck removal, unless required as Class B or surface preparation beyond that which is incidental to the removal process. On completion of removal, the Engineer will inspect the deck to determine if further removal is required. Temporarily plug bridge drains to prevent waste materials from entering the drainage system. Protect expansion joints and barrier curbs from damage. Class A removal is the removal of concrete from the deck top surface specified and to the mean depth limits specifie d. Use hydrodemolition or mechanical means after the seal coat has been removed. If the hydrodemolition removal extends beyond the mean removal depth where unsound concrete is encountered, the Department will still consider the work Class A removal at no additional cost to the Department. Remove concrete, not removed to specified limits during hydrodemolition, by mechanical means. If less than an entire continuous slab is to undergo Class A removal, saw cut the line separating where it is required and the section where removal is not required, before removal of concrete, to a depth of approximately 75 percent of the planned removal depth. Class B removal is the removal of concrete after completion of Clas s A removal and as directed.
632.02 Materials.
None specified.
632.03 Construction Requirements.
Before starting deck remo val, obtain Department approval of the concrete mix design for the new deck
A.Class A Removal.
1.Mechanical Removal. Perform mechanical removal using power -operated diamond grinding machinery or by the use of 30- pound maximum jackhammers operated at a 45° angle or less from the surface of the slab. If reinforcing steel is exposed in the course of this class of removal, immediately stop work and request instructions from the Engineer.
2.Hydrodemolition Removal
a.Concrete Removal. The Engineer will designate a trial area for the Contractor to show the equipment, personnel, and methods of operation are capable of producing satisfactory results. The Engineer will set parameters for the removal of the concrete. Begin work upon Engineer acceptance of the trial results area.
b.Completely clean exposed steel of rust, scale, and corrosion. Repair reinforcing steel that is damaged or broken with an approved procedure at no additional cost to the Department as specified in 502.03.E.
c.Equipment. Use hydrodemolition equipment that is self -propelled with a high- pressure water jet stream capable of removing concrete to the specified depth and capable of removing rust and concrete particles from reinforcing steel . Use hand -held, high- pressure wands or 30- pound
Source: Idaho Standard Specifications for Highway Construction, 2023 Edition. Pages 586–586 of 768.