3/27/2016. Crack filling/sealing PLANNING & SCHEDULING. Two types of crack treatment

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1 Crack filling/sealing Two types of crack treatment Crack Filling: Pavements that are in good condition Working cracks Crack Sealing: Filling non working cracks closely spaced Most cost effective treatment for preventive maintenance PLANNING & SCHEDULING 1

2 OVERBANDING CHIPSEALING Blowing Cracks 2

3 Lighting Heat Lance 3

4 Using Heat Lance 4

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9 Router CRACK SEALING CHECK LIST Do site inspection/evaluation Do traffic control plan to include speed reduction Schedule equipment and people for job Insure that quantity of crack filler material is on hand Coordinate for Colorado State Patrol support for job Coordinate for press release through Bob Wilson Set out VMS boards to warn public of prior to job Designate Traffic Supervisor and insure flagger certification Schedule heating of material several hours prior to work Schedule tail gate talk 9

10 EQUIPMENT Tar pot Air compressor with heat lance 2 VMS boards Tow vehicle/crack filler hauler REPORTING Material class code Activity Material quantity reported = pounds Accomplishment = gallons 10

11 QUESTIONS? CHIP SEALS 11

12 PROPER SHOT RATE POUNDS PER SQUARE YARD CLEAN SURFACE AND SHOULDERS PUSHED BACK 12

13 CHIP PILE AND STORAGE Loading for Chip Seal Traffic Control 13

14 Shot rate even tack coat Screen Maintenance 14

15 Incorrect Nozzles or plugged Screen Nozzle selection Spray bar height must be set exactly for proper coverage Coverage Single Double Triple 15

16 Calibrate equipment Spray bar height Nozzle angle Spray bar pressure Proper nozzle angle setting Nozzle Angle Setting = Spray bar Axis SPRAY BAR 16

17 Depth of asphalt binder just before chip application Depth of asphalt binder just after chip application Depth of asphalt binder just after rolling Depth of asphalt binder after considerable traffic Backing (GOAL) 17

18 Stagger Trucks when backing to help with rolling. Hookup 18

19 Joints Paper all Joints Clean joint 19

20 Overlap no paper Keep correct distance from distributor 20

21 Roll chips as soon as possible Blot Truck 21

22 Rolling 22

23 CHIP CALCULATION GUIDE DETERMINE: 1. Length of job in feet 2. Width of job in feet 3. Chip rate (28 lbs by normal estimate factor/starting point) CALCULATE TONS : Length X Width divided by 9 = square yards Square yards X Pounds per square yard (28) = pounds Pounds divided by 2000 = tons of chips LIQUID ASPHALT (HFMS2P) CALCULATION GUIDE DETERMINE: 1. Length of job in feet 2. Width of job in feet 3. Desired shot rate of job (normally.38 to.46 depending on chip size) CALCULATE GALLONS AND TONS : Length X Width divided by 9 = square yards Square yards X shot rate (.38) = gallons of oil Gallons divided by 238 = tons of oil CHIP JOB CHECK LIST Do site inspection to do materials estimate Do job estimate to insure commission limits are met Order and schedule chip deliver (PO) Order oil 4 days out (PO) Do traffic control plan to include speed reduction Schedule equipment and people for job Coordinate to sweep job site Order and plan tab placement Secure and put up job signs and VMS boards Coordinate for Colorado State Patrol support Coordinate with Bob Wilson for press release Identify traffic control supervisor/insure flagger cards Schedule to move equipment to job site Schedule tailgate talk Schedule briefing for traffic control personnel Schedule drivers meeting day prior/training talk Mark overhead wires Monitor weather/2 am call off if poor weather Pavement/air temperature: 70 degrees and rising Warning letter in mailboxes prior to job Arrange for post job sweeping Have blotting material on hand Have truck with MDSS on site Have rosin paper on hand Check chipper bar height on all tandems Check truck fit (bar and bed) to chipper day prior to job 23

24 ORDERING FACTORS There are 25 tons per tanker load One tanker load will normally cover 2 miles/one lane (15 ft) Order oil 4 days in advance Confirm order the day before 1 st tanker should be on site at 7 am Order loads 1.5 hours apart One tanker normally carries 25 tons/6000 gallons Normally use 8 tandems with one spare Oil is polymer modified emulsion CRS-2P 2000 gallons distributor gets 3.25 pulls from tanker Oil is 238 gallons per ton/8.4 lbs per gallon Demurrage is paid 2 hour after scheduled delivery time. Pay attention to arrival time. Call vendor if truck is late. Have blotting material on site. Can be sand or crusher fines. Have rosin paper on hand Allow 25 minutes to load 2000 gallons Tab every 4 th stripe EQUIPMENT NEEDED Chipper Roller x 2 Distributor x 2 Dump trucks x 8 Tilt trailer Broom/side sweep Tandem with water tank Loader MATERIAL REPORTING Activity 160 Emulsion= class 13 in gallons Chips= class 11 in tons 24

25 QUESTIONS? 25