140L5723Q0033_Amendment_0001_Flush_Coat_Specifications_0001.pdf
PDF 141 KB Posted
- Attached to
- BLM UT-Red Cliffs Recreation Chip Seal/Flush Coat Federal contract opportunity
- Solicitation number
- 140L5723Q0033
About this file
This document outlines specifications for a flush coat application project. The Bureau of Land Management Utah Region is soliciting bids for contract 140L5723Q0033 to apply a flush coat to existing chip seals at Red Cliffs Recreation sites. Specifications require the use of cationic emulsified asphalt with natural latex rubber material applied at a rate of 0.12 to 0.16 gallons per square yard. The surface must be cleaned, dried, and prepared before application between 50-120 degrees Fahrenheit. All markings, sweeping, and equipment are also specified.
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Other files for this federal contract opportunity
| File | Type | Posted |
|---|---|---|
| 140L5723Q0033_Amendment_0001_Site_Visit_Notes_Q_A_0001.pdf | ||
| Sol_140L5723Q0033_Amd_0001.pdf | ||
| 140L5723Q0033_Amendment_0001_Chip_Seal_Specifications_0001.pdf | ||
| 140L5723Q0033_Attachment_03_Bid_Schedule.pdf | ||
| Sol_140L5723Q0033.pdf | ||
| 140L5723Q0033_Attachment_04_Wage_Determination_UT20230045_02-03-2023.pdf | ||
| 140L5723Q0033_Attachment_03_Bid_Schedule.xlsx | XLSX spreadsheet | |
| 140L5723Q0033_Attachment_01_Plans.pdf | ||
| 140L5723Q0033_Attachment_02_SOW.pdf |
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Text version
RED CLIFFS FLUSH COAT
SPECIFICATIONS
FLUSH COAT APPLICATION. Work shall consist of preparing and treating an existing bituminous chip seal with asphaltic emulsion. The type and grade of bituminous material shall be cationic emulsified asphalt with a natural latex rubber material (type CSS 2:1 Oil).
Contractor recommends any other bituminous material it must be approved by the Contractors Officer Representative and shall conform to local County specifications.
Asphalt emulsion used as a Flush coat between courses of plant mix surface, or over an existing surface, shall be prepared for application by using warm water to cut back the emulsion in the quantity of fifty (50) percent of the emulsion weight.
Bituminous material shall be applied to the width of the section to be tacked by means of a pressure distributor in a uniform, continuous spread. Care shall be taken that the application of bituminous material at the junctions of spreads is not in excess of the specified amount. Skipped areas or deficiencies shall be corrected.
The Contractor shall provide equipment for heating and applying the bituminous material. The asphalt distributor shall be so designed, equipped, maintained and operated that bituminous material will be applied uniformly on variable widths of surface at readily determined and controlled rates.
Application of Flush coat may occur only when the surface and air temperature is 50° Fahrenheit, and rising. The surface shall be clean, dry, free of irregularities, and shall be smooth and uniform.
At the time of placement, the temperature of the asphaltic emulsion shall be uniform and not less than 100 degrees Fahrenheit or more than 170 degrees Farenheit. The Flush shall be applied at a rate of 0.12 to 0.16 gallon per square yard. The rate of application may be adjusted by the Contractors Officers Representative.
ASPHALT DISTRIBUTOR. The asphalt distributor shall be equipped with a calibrated dipstick marked in gallons per in of length, and an accurate thermometer and speedometer. The distributor shall also be capable of maintaining proper pump pressure to ensure a uniform distribution of liquid asphalt emulsions at all times. The pump shall be able to maintain the correct pump speed and pressure, without either atomizing the asphalt of distorting the spray fan. However, the pump shall be able to maintain a pressure which shall be sufficient to prevent streaking from a non-uniform discharge.
ASPHALT EMULSION FLUSH COAT. The asphalt emulsion should be a liquid asphalt cement emulsified in water. Composed of asphalt water and emulsifying agent. Asphalt emulsion shall be spread evenly on top of existing surface and shall only be applied on clean and debry free pavement. Asphalt emulsion must meet Department Of Transportation standards.
POWER BROOMS. The Contractor shall provide at least one self-propelled rotary power broom our sweeper at the job site, and shall use supplemented hand brooms if necessary as required, to sweep the excess aggregate on the edge of each pass which will be in contact with the next pass so that there will be no build up of excess chips.
SURFACE PREPPARATION. All dust, dirt and foreign material shall be removed from the surfaces, by process of power sweeping the surface with power brooms our power blowers, or by flushing it with water or a combination of the above. All patching, crack -filling and drainage improvements required by the Contractors Officer Representative, shall be completed prior to the commencement of the treatment application. After the cleaning operation has been completed, and prior to the application of the surface treatment., the are to be treated will be inspected by the COR, to determine its fitness for receiving the Flush coat.
MARKINGS/PAINTING. Paint shall conform to the requirements of AASHTO M 248.
ProMar Acrylic Solvent Based Traffic Marking Paint. The paint shall be homogeneous, easily stirred to smooth consistency, and shall show no hard settlement or other objectionable characteristics during a storage of 6 months. Pavement markings paints shall comply with applicable state and local laws enacted to ensure compliance with Federal Clean Air standards.
WEATHER LIMITATIONS. Flush Seal treatments shall be placed only when the air temperature in the shade is above 50 degrees Fahrenheit. The fog coat shall not be placed when the road surface is below 70 degrees Fahrenheit, and above 120 degrees Fahrenheit, Do not apply Flush Coat if road is wet our during any conditions that are not suitable for road work.
The Contractor Representative can stop work on any weather-related issues.
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