Asphalt Technician Certification Program S - Smoothness (Operator) 2015 Presentation Manual In cooperation with the Colorado Asphalt Pavement Association, the Colorado Department of Transportation, and the Federal Highway Administration
October 2014 LabCAT Certification Program Information based on: Revisions of Sections 105-89 Hot Mix Asphalt Pavement Smoothness and Revisions of Sections 105-90 and 601 Introduction of CAPA & RMAEC Staff LabCAT Board of Directors LabCAT Technical Committee Program Description Safety General G l facility f ilit IInformation f ti 1
Tom Peterson, P.E. Tom Clayton, SET Diane Hammond Cindy Rutkoski Jim Fife Thomas Peterson, P.E. Bill Schiebel, P.E. Gary DeWitt, P.E. Mike Coggins, P.E. Randy Jensen, P.E. Jeff Keller Ken Coulson K C l Dale Miller Scott Sounart, P.E. Mike Skinner, PE CAPA Executive Director RMAEC Director of Training RMAEC Training Coordinator RMAEC Instructor CAPA Western Slope Consultant CAPA Co Chairman CDOT Co Chairman CDOT R 4 CDOT, R 5 FHWA APC Construction Coulson Excavating C l E i Larimer County Kleinfelder, Inc Skinner PE 2
Tom Clayton, SET Stanford P.E. PE Mike Stanford, Johnny Lam, EIT Darrell Harding, P.E. Donna Harmelink, P.E. Clayton Goodwin Ethan Weichert, P.E. David Fife John Cheever Todd Geneovese Carey Jones, P.E. Tom Hastings RMAEC, Co Chairman CDOT, Co Chairman CDOT Asphalt Pavements FHWA/CFLHD FHWA City/County of Denver Earth Engineering United Companies Aggregate Industries Martin Marietta Materials Kumar and Associates AG Wassenaar Inc Certification A Laydown Certification B Plant Materials Control Certification C Volumetrics & Stability Certification E Aggregates (A separate 1 day program) Certification I Asphalt Inspector (A separate 1 day program) Certification S HSP (Smoothness) (Operators) (Today s session) 3
Certification Level Overview: This certification will cover profiling for smoothness of HMA and PCCP materials using the high speed inertial profiler for HMA and PCCP. This is Certification for High Speed Profile operators, only. Equipment Certification will occur Annually and be administered by CDOT, at a different location. Item #1 Effective January 31, 2014 This change has been approved by the LabCAT Technical Committee and the LabCAT Board of Directors. Change took effect January 31, 2014. Written Exam Re Test Fees The written exam re test fee is $25 per level. 4 Item #2 Effective December 2,, 2014 This change has been approved by the LabCAT Technical Committee and the LabCAT Board of Directors. Change will take effect December 2, 2014. 4
Written Exam Re Test Administration re test The written exam re test will be administered immediately following failure of the initial written exam. If the re test is failed, the technician will not be allowed to continue the certification process. The level must be started over in a new session date. The full certification fee per level will be assessed. These policy supersede h l changes h d all ll references f regarding written re test fees and re test administration published in the 2014 RMAEC Policy and Procedure Manual. Written test will be given, You will have 45 minutes to complete the written test! 80% correct required to pass, Written and Proficiency. One written re re test will be allowed at a cost of $25. If a candidate Fails the p proficiencyy p portion of the exam, f ll be b charged h d at $150 and d will ll not b proficiency re exams will be allowed on the same day as the original testing. Retesting will need to be scheduled prior to the Retest occurring. Operator field proficiency testing will be done and administered at the approved track established by the RMAEC, near the RMAEC Training Facility. The operator will be tested on the setup and operation of the equipment. Operators must pass both parts to be eligible to operate the profiling equipment on a CDOT project. 80% correct will be required on both parts of the certification (Written and Proficiency) 5
If a candidate is re certifying, the proficiency examination mayy be conducted verbally. y The operators will be required to re certify on a 3 year basis. The contractor should survey the roadway for anything which mayy cause issues in obtaining g an accurate profile. It is important that the operator be able to drive the project from one point to another without having to alter the speed or without swerving from lane to lane. 6
High Speed Profiling has many challenges! At times the operator will need to make a decision on to move right or move left Here is an example of when this might occur! It is important for contractors to prepare the roadway prior to the actual p profile being performed. p gp The roadway must be sufficiently cleaned utilizing the most modern equipment available. 7
To achieve as accurate of a profile as possible, the paving contractor must prepare the roadways in attempt to have the surface be clean and free of debris and loose materials Using the best and most sophisticated machinery possible is a must! Over the next few slide we will present some process of obtaining information on the p g data for roadway smoothness. High speed profiling is based on research from the automobile companies and has evolved in what is being done today to measure roadway smoothness. 8
Ride Quality depends on: 1 Human response to vibration of vehicle 1. vehicle. 2. Vehicle response to the road. 3. Road roughness transferred through the vehicle limitations. Auto companies in the 1970 s spend considerable effort studyy vehicle vibrations,, theyy were determined to be: heave, waddle, shake, chatter, jitter, porpoise, tire nibble, etc. There are two major motions which ultimately effect the movement of a vehicle, they are; body bounce axle hop. 9
Th U.S. U S auto companies i The contracted with a University to research the human movements in a vehicle. The research determined g byy using g the manyy things services of University student. The data included the human response to vibration. The automobile industry estimates ride by at several interfaces: measuring g response p Seat/buttock Seat/back Floor/feet Steering Wheel/Hand 10
Vital organs in the abdominal cavity resonate at about 5 Hz. A human head resonates at about 25 Hz. Human eyes resonate at 30 80 Hz. It is tough to grip a steering wheel if it is moving at 50 200 Hz. The vehicle exaggerates some road features and isolates you from others. Each vehicle responds to the roughness of the road differently. Some features in the road are more significant to vehicle response than others. 11
Gain 4 Pickup 3 2 Sedan 1 0 5 1 2 5 10 Frequency (Hz) 2 5 100 History IRI Response 2 1.5 1.5 0 1 10 Wavelength (ft) 100 12
International Roughness Index A filter that a road profile is passed through to estimate vehicle response to a road Quarter Car Model or Golden Car Units of in/mi (Up/Down deviation from a known ZERO Plane) Left Profile Average of Profiles Right Profile 1/2 Car = 1/4 Car using averaged profile input 13
The HRI is calculated from profile elevations in the LWP and the RWP The profiles are averaged point by point to create an average profile The IRI algorithm is applied to the resulting profile. Good way to isolate Localized Roughness High Speed Inertial Profiler Straight Edge Walking Profilographs Lightweight Inertial Profiler Pave set system 14
Inertial Profilers Diagram courtesy of LMI Taking the place of walking profilographs Using Laser and Technology U i L d IInertia ti T h l Faster response time Roughness and Rut Depth are the most common uses for inertial profilers 15
Components of a Profiler Vehicle GPS Optional Computer Vehicle to house q p Equip Sprung Vehicle Mass Suspension Spring & Dampener Speed & Distance Encoder Accelerometer & Laser Sprung Axle Mass Tire Spring 1960 s; GM Research Laboratories 16
Accelerometer Laser Photo cell used for auto triggering This is the Surface Area getting tested with a single spot laser Most common Laser is small spot size laser 17
100mm (4inches) 18
LMI Roline; 50mm measurement window is less resolute than the RoadMap. Standoff; 200mm Measurement Range; 200mm Actual Measurement Window; 50mm FOV @ SO; 76.4mm FOV @ FE; 147mm Profile Rate; 3kHz max. p ; 256max ((100 normal)) Points/profile; Tracking window 50mm measurement range (28 pixels) Scan rate 750Hz 19
Critical to finding the areas of concern Calibrating prior to each test is critical Has to be accurate to a certain tolerance Can manipulate the data 20
Components of a profiler? Lasers? Manufacturer off profilers M f t fil? Data collection? 21
The Smoothness Categories have been changed; the new Categories are I, II, III and I II IV 22
1. Use on Urban Reconstruction with or without curb and gutter; 2. Use on construction of one layer y over an intermediate treatment [Removal of Asphalt Mat (Planning), Cold Bituminous Pavement (Recycle), Heating and Remixing, Heating and Repaving, Full Depth Reclamation, leveling course with a thickness of 1.5 inches or less, or other intermediate treatment]; 3. May use on overlays meeting case No. 2 above, with curb and gutter when a shoulder separates driving lanes from the curb and gutter. A minimal amount of utility boxes, intersections and grade changes are allowed. Inset a plan note stating that lanes do not h have h the h new asphalt h l driving d l d to match curb and gutter. 4. May use on overlays meeting case No. 2 above, with curb and gutter when pavement smoothness is very important (Example: Speed limit higher than 39 mph). A minimal amount of utility boxes, intersections and grade changes are allowed. Inset a plan note stating that the new asphalt driving lanes do not have to match curb and gutter. 1. Use on new construction with or without curb and gutter; 2. Use on construction of more than one layer; 3 May use on overlays meeting case No 3. No. 2 above above, with curb and gutter when a shoulder separates driving lanes from the curb and gutter. A minimal amount of utility boxes, intersections and grade changes are allowed. Inset a plan note stating that the new asphalt driving lanes do not have to match curb and gutter grades. 4. May use on overlays meeting case No. 2 above, with curb and gutter when pavement smoothness is very important (Example: Speed limit higher than 39 mph). mph) A minimal amount of utility boxes, intersections and grade changes are allowed. Inset a plan note stating that the new asphalt driving lanes do not have to match curb and gutter. 23
1. Only one layer of pavement is being placed without an intermediate treatment. 2. Only one layer of pavement is being placed over Heating and Scarifying. 3. Heating and Repaving without an overlay. 4. May be used in urban overlays with curb and gutter when a shoulder separates driving lanes from the curb and gutter. A minimal amount of utility boxes, intersections and grade changes are allowed. A note needs to be placed in the plans stating that the new asphalt driving lanes will not have to match curb and gutter grades. 24
5. May be used in urban overlays with curb and gutter when pavement smoothness is very important (Example: Speed limit higher than 39 mph). A minimal amount of utility boxes, intersections and grade changes are allowed. A note needs to be placed in the plans stating that the new asphalt driving lanes will not have to match curb and gutter. HRI Category IV is applied to the following asphalt pavement construction: 1. Cold Recycling without an overlay. 2. Thin overlays (less than 1.5 inches thick) of HMA or SMA without an intermediate treatment. 3. Heating and Scarifying without an overlay. 4. Heating and Remixing without an overlay. 5. Urban rehabilitation treatments when smoothness is affected by matching existing curb ff t d b t hi i ti b and d gutter tt and/or d/ numerous intersections and/or utility boxes. This is not for reconstruction in urban areas. 25
Paving Category IV has no incentive 1-5 or disincentive and treatments 1 5 are is tested according to subsection 105.07 (f). A force account for pavement smoothness is not needed if the project is only HRI Category IV. HRI Category I is for construction that will be affected by curb & gutter, numerous intersections, and utility boxes. HRI Category II is for express ways, interstates and any other PCCP that is not affected by curb & gutter, numerous intersections, and utility boxes. Short sections of PCCP panel replacement will not be subject to incentive/disincentive payment, but will be evaluated for localized roughness. Pick HRI Category I or II and use the following note: PCCP Panel Replacement shall not be subject to Incentive/Disincentive payments but shall be subject evaluation of localized roughness for HRI Category (I or II) 26
No pavement smoothness category is applied to the following asphalt pavement construction: Chip seals Chip seals are not tested at all for smoothness. Place the pavement smoothness category assignment in the General Notes. HRI Category II is the default smoothness category in the specification if a smoothness category is not listed in the plans. Do not assign Urban or Rural to any smoothness category. Do not assign percent improvement. improvement These smoothness categories are no longer in existence. 27
When appropriate, divide the project into different sections with different pavement smoothness categories instead of using the easier pavement smoothness category for the whole project If the designer intends for shoulders to be g lanes, add a note to the General future driving Notes stating whether these future driving lanes are subject to incentive/disincentive adjustments. Each lane shall be profiled at least once. Profiling shall be at a constant speed (+/ p ( / 5 mph p of the distance calibration speed ) with a minimum speed of 15 mph and a maximum speed of 70 mph. Shoulders with a width of 12 feet or more, ramps, tapers, turn slots, acceleration lanes and deceleration lanes shall be profiled. The profile shall be taken in the planned direction of travel. travel The left and right wheel paths shall be profiled simultaneously. The collected profiles shall be turned over immediately to the Engineer and will be analyzed using CP 74. 28
Tests begin 25 feet outside joint This 25 ft plus 25 feet of new pavement is subject to Localized Roughness Only Table 105 6 HMA PAVEMENT SMOOTHNESS (INCHES/MILE) HALF CAR HALF CAR ROUGHNESS INDEX When HRI 45.0 I = $1.28 When HRI 70.0 and 80.0 I = $0.00 When HRI > 80.0 and < 100.0 I = 5.12 0.064 x HRI (Disincentive) When HRI > 45.0 and < 70.0 I = 3.584 0.0512 x HRI When HRI 100 I = $1.28 (Disincentive) When HRI > 100 Corrective Work 29
Areas of localized roughness are determined to be where the continuous HRI report exceeds the values in Table 105 9. Areas of localized roughness greater than 15.0 feet in length shall be considered deficient, and require corrective work. Areas of localized roughness less than 25 feet in distance that contain a valve box shall be tested in accordance with subsection 105.07 (a) 2. for corrective work. Table 105 9 CONTINUOUS HRI USING 25 FOOT AVERAGING FOR LOCALIZED ROUGHNESS CORRECTIVE WORK ON HMA PAVEMENTS HRI SMOOTHNESS CATEGORY HRI In/mile I / il I = 135.0 II = 125.0 III = 150.0 IV does not have a threshold 30
HMA Recycling Treatment s, Thin Lifts Urban ifts and U ban Rehabilitation treatment s smoothness criteria. When HMA recycling, urban rehabilitation treatments or when only one layer less than 1.5 inches of HMA Pavement is p placed without an intermediate treatment are constructed as the final riding surface, the following shall be used for acceptance Report results to the nearest 0.1Mile f 2000 tons for f the h final fi l SQC test after layer Contractor notification of SA testing Contractor must wait maximum of 10 working days to do corrective work if SVT is i tto be b done d Contractor must mark profiling limits and excluded areas. 31
Certification should follow AASHTO guidelines Do not use another profiler to set the standard IRI<6 no worries Driving Styles Who has the best profiler? Do not certify on a smooth surface Needs to be med smooth to semi rough Do put out dots where WP will be Do make it long enough 528 2640 CDOT Equipment Certification Smoothness Assurance; Texture Micro vs. Macro; Too much or little Negative or positive Longitudinal or transverse Walking Profilograph Texture Texture Depths; Different HMA surface courses Surfacing Material Texture Depth Asphalt Concrete (fine graded) 0.4mm - 0.6mm (coarse graded) 0.6mm - 1.2mm Open Graded Friction Coarseness SMA 1.5mm - 3.5mm 32
Think Thi k about b t the th end d fifirstt CP 74 06 (AASHTO PP 50 03) Height sensor check Accelerometer check Bounce Test Distance calibration Verification site check 33
Performed weekly To ensure accuracy of each height sensor Compare readings of blocks of known thickness The laser shall read the blocks thickness to within 0.01 of an inch Blocks are measured yearly with a certified caliper Base plate 0.25 inches h 0.50 inches 1 inches 2 inches Base plate At a minimum a 1 and 2 block will be checked per AASHTO PP 50 Each apparatus manufacturer will have specific height blocks for their equipment 34
Laser 1 Driver side New set Base check 2nd reading Laser 1 driver side Sensor block #1 March 2008 Laser 1 driver side S bl k # 2 Sensor block Continue with all required blocks per the manufacturers instructions i t ti Repeat same procedure for laser 2 March 2013 35
The accelerometer calibration is performed to ensure the accuracy of each accelerometer Position the inertial profiler on a relatively flat and level area The accelerometer calibration performed everyday prior to testing or when the profiler measurements are in doubt. Software may vary from manufacturer to manufacturer Screen May appear different from Manufacturer to Manufacturer The bounce test is performed to verify that height sensors and accelerometers in the profiler are functioning properly together Measures the electrical noise of the profiler Performed weekly j with a smooth surface An object is placed on the pavement under each laser sensor so that the texture of the pavement will not affect the test Software may vary from manufacturer to manufacturer Screen May appear different from Manufacturer to Manufacturer 36
Prompt the Computer to run a bounce test Perform a bounce test per the manufacturers directions Analyze the data collected. Verifyy the data collected meets the manufacturers recommendations for this equipment Software may vary from manufacturer to manufacturer Screen May appear different from Manufacturer to Manufacturer Tires are warmed to assure proper tire pressure per the tire manufacturer Verify the tires are inflated to the tire manufactures recommendations Check Tire Pressure of all tires on the vehicle, record the date and pressure of each tire in a log book The Th pressure is i acceptable bl only l if all ll pressures are the same 37
The distance calibration is performed to ensure the accuracy of the profilers distance measuring instrument (DMI) Done prior to measurements at each project Prepare the equipment per the manufacturers directions Run the Distance Calibration, verify the distance measured. Continue following the on screen directions Site should be run at the same speed as distance calibration Done once a week at a known verification site. (This should be a site you create within a short period of time after you have your equipment certified by CDOT. It does not d to t be, b but b t can b tifi ti site.) it ) need be th the CDOT certification To ensure the accuracy of the profiler s data collection systems. A CDOT site will be established one or more times a year where the profile of the road should remain stable. This will be the site CDOT will use to Certify Equipment, yearly. The site should profiled 10 times. 38
The average of the 10 runs is the target for future runs. The weekly runs are considered acceptable if the IRI is within 2 standard deviations from the average of the 10 initial runs Conformity y to Roadway y Smoothness Criteria. Roadway smoothness testing and corrective work shall be performed as described in the CDOT Specifications and procedures 39
HMA Pavement Criteria: (Continued) Contractor Smoothness Quality Control. A profile shall be taken on the first 2,000 tons of each profiled lift and again after completion of that lift, submitted to the Project Engineer within 48 hours hours. NOTE: The contractor may at their own risk, continue to place materials without the final smoothness data being available. Test results shall show the Half Car Roughness Index (HRI) for each 0.10 mile QC and QA testing shall be performed using the Contractor s inertial profiler. The Contractor s QC will Profiler shall be certified byy CDOT, the operator p be required to have a current LabCAT Level S Certification at the time of equipment certification. The contractor shall notify the engineer in writing of his intention to perform the initial QA testing. This shall be at least 5 working days in advance of ant work that will affect the smoothness of the lanes. CDOT may elect to profile any project using the DOT HSP equipment. equipment The DOT profile will be considered an independent profile to verify the data collected by the contractors equipment 40
Production shall be suspended if QC testing indicates that corrective work is required. P d i will ill remain i suspended d d until il the h Production problem is identified and corrected. Each time production is suspended, corrective actions shall be proposed in writing by the Contractor. When production resumes, the Contractor shall profile the first 2,000 tons of HMA. The conditions above for suspension of work will apply. apply Contractor Corrective work shall be proposed in writing by the Contractor. Corrective work shall not be performed until approved in writing by the Engineer. Corrective work shall be completed on the top lift after the Quality Assurance Smoothness (QA) testing is complete. Corrective work on lower lifts will be at the Contractor s discretion. Incentive/disincentive payments will be based on the QA testing and analysis by CDOT. The Contractor shall verify and perform any corrective work in the areas indicated by the QA testing report by CDOT. The Contractor shall profile the roadway to verify that the required corrective work has been completed. 41
Half Car Roughness Index Corrective Work: The criteria for determining if a 0.1 mile section or fraction thereof requires corrective work is specified in Table 105 7. In addition to determining if a 0.1 mile section or fraction thereof requires corrective work, the profiles shall be analyzed for areas of Localized Roughness. Localized Roughness. The profiles shall be analyzed to determine where areas of localized roughness occur. The profile shall be summarized using the continuous HRI reporting system using an averaging length of 25 feet. The latest release of the FHWA s ProVal software shall be used to generate the continuous HRI report. (www.roadprofile.com) Areas shall be considered deficient, and require corrective work where the continuous HRI report exceed 150.0 In/mile. ROUGHNESS CORRECTIVE WORK ON HMA PAVEMENTS Half Car Roughness Index Corrective Work. The criteria g if corrective for determining work is required for a 0.10 mile section or fraction thereof is within the CDOT Specifications HRI SMOOTHNESS CATEGORY HRI In/mile I 135.0 II 125.0 III 150.0 42
HRI Category g y I is for construction that will be affected by curb & gutter, numerous intersections, and utility boxes. HRI Category II is for express ways, interstates and d any other th PCCP that th t is i not affected by curb & gutter, numerous intersections, and utility boxes. PCCP Pavements Criteria: Conformity to Roadway Smoothness Criteria. Roadway smoothness testing and corrective work shall be performed as described in REVISION OF SECTIONS 105.90 PORTLAND CEMENT CONCRETE PAVEMENT ROADWAY SMOOTHNESS (HIGH SPEED PROFILER) The pavement smoothness category shall be HRI Category II unless shown on the plans. The Contractor shall perform Smoothness Quality Control (SQC) testing. A profile shall be taken for each day s paving within 24 hours after the concrete has achieved sufficient strength. The Contractor shall not perform the SQC testing until after the concrete has attained a compressive strength of 1,000 psi if a light weight profiler is used or 2,000 psi if a high speed profiler is used. The test results shall be submitted to the Engineer within 48 hours of completion. completion SQC test results shall show the Half Car Roughness Index (HRI) for each 0.10 mile section and the results for localized roughness 43
All traffic control costs associated with SQC testing will be paid for in accordance with Section 630. SQC testing shall be performed using the Contractor s Contractor s inertial profiler, pursuant to the methods described in subsection 105.07(b) and in accordance with the manufacturer s recommendations. The Contractor s Profiler shall be certified according to CP 78. A list of certified profilers is located at http://www.dot.state.co.us/designsupport/ Production shall be suspended if SQC testing indicates that corrective work is required in accordance with subsection 105 105.07 07 (c). Production will remain suspended until the problem is identified and corrected. Each time production is suspended, corrective actions shall be proposed in writing by the Contractor. Corrective work shall not be performed prior to the Department s Initial Smoothness Acceptance testing. resumes the Contractor shall profile the first half When production resumes, mile of paving. The conditions above for suspension of work will apply. The finished transverse and longitudinal surface elevation of the pavement shall be measured using a 10 foot straightedge. The Contractor shall furnish an approved 10 foot straightedge and depth gauge and provide an operator to aid the Engineer in testing the finished pavement surface. Areas to be measured shall be as directed by the Engineer. Engineer Areas showing high spots of more than 3/16 inch in 10 feet shall be marked and diamond ground until the high spot does not exceed 3/16 inch in 10 feet. When longitudinal tining is required on concrete pavement, the pavement shall be grooved to restore the longitudinal texture (tining) as shown in the plans and specifications. 44
Initial Smoothness Acceptance (SA) Testing. The Department s smoothness testing results will be used for acceptance and calculation of incentive and disincentive payments. All traffic control costs associated with SA testing will be paid for by the Department in accordance with Section 630. Longitudinal Pavement Surface Smoothness Acceptance. Pavement surfaces shall be tested and accepted for longitudinal smoothness as described herein. Testing Procedure (General). The longitudinal surface smoothness of the final pavement surface shall be tested and evaluated by the Department in accordance with CP 74 using the Department's high-speed profiler (HSP). The HSP instrumentation will be verified in accordance with CP 74 prior to measurements. The Contractor shall lay out a distance calibration site. The distance calibration site shall be located no more than ten miles from the Project limits. The distance calibration site shall be 1056 feet long g and shall be on a relatively y flat, straight section of pavement as approved by the Engineer. The site shall have a speed limit equal to the Project s highest speed limit that allows for the HSP to operate uninterrupted. The limits of the site shall be clearly marked and the distance shall be measured to an accuracy of +/- 3 inches. The Contractor shall provide in writing the site location to the Engineer. The cost of the distance calibration site will not be measured and paid for separately, but shall be included in the work. The Contractor shall notify the Engineer in writing at least 10 working days in advance to schedule SA testing. The Engineer will not schedule pavement smoothness testing if the Contactor has not submitted SQC results 45
The Contractor shall notify the Department at least 48 hours prior to the scheduled SA testing date when the smoothness testing needs to be cancelled for any reason. The Contractor shall be charged $500 for failure to meet this requirement and rescheduling i required. i d Th i i th h is The E Engineer may waive the $500 charge if rescheduling is a result of weather or at the convenience of the Department. The entire length of each through lane, climbing lane and passing lane including bridge approaches, bridge decks and intersections from the beginning to the end of the project shall be profiled. A sufficient distance shall be deleted from the profile to allow the profiler to obtain the testing speed plus a 300 foot distance to stop and start when required. Incentive/disincentive payments will not be made for this area. The profile shall include transverse joints when pavement is placed by the project on both sides of the joint. When pavement is placed on only one side of the joint, the profile shall start 5 feet outside the project paving limits. Th profile fil off th h side id off every manhole, h l railroad il d The the area 25 ffeett each crossing, cattle guard, gutter pan and intersection (where there is a planned breakpoint in the profile grade line in the direction of testing) shall be deleted from the profile before the HRI is determined. When both new pavement and a new bridge or new bridge pavement are being constructed in a project, the profile of the area 25 feet each side of every bridge expansion device shall be deleted from the profile before the HRI is determined. Diamond grinding will not be measured and butt shall be iincluded the work. d paid id ffor separately, t l b h ll b l d d iin th k 46
Localized Roughness. The profiles shall be analyzed to determine where areas of Localized Roughness g occur. The profile shall be summarized using the continuous HRI reporting system using an averaging length of 25 feet. The FHWA s ProVal (Version 2.7 or later) software shall be used to generate the continuous HRI report. ProVal can be downloaded at www.roadprofile.com www roadprofile com Corrective work on concrete pavements shall consist of diamond grinding. When any grinding on concrete pavement occurs where a core for determining pavement thickness has been previously taken, another core shall be taken after the grinding has been completed and shall replace the original core in the calculation of pavement thickness incentive and disincentive. Joint sealant that has been damaged by grinding on concrete pavement shall be repaired or replaced at the Contractor s expense. Cores shall be taken to verify that minimum pavement thicknesses have been maintained. A minimum of one core shall be taken every 100 cumulative feet per lane of diamond grinding, as directed by the Engineer. Coring shall be at the Contractor s expense. When longitudinal tining is required on concrete pavement, the pavement shall be grooved to restore the longitudinal texture (tining) as shown in the plans and specifications. 47
The Contractor shall lay out a distance calibration site. The distance calibration site shall be at least 1056 feet long pavement as approved byy the Engineer. g section of p pp g The site shall allow the HSP to operate at the testing speed without interruption. The limits of the site shall be clearly marked and the distance shall be measured to an accuracy of +/ 3 inches. The Contractor shall provide the measured distance of the site to the Engineer. The cost of the distance calibration site will not be measured and paid for separately, but shall be included in the work. The Contractor shall notify the Engineer in writing at in advance to of the intent to perform pavement smoothness Quality Assurance testing at the completion of paving and after corrections are completed. The Engineer will not accept finial pavement smoothness testing if the Contactor has nott submitted b itt d QC results. lt 48
A sufficient distance will be deleted from the profile to profiler to obtain the testing plus allow the p g speed p p a 300 3 foot distance to stop and start when required. The profile will include transverse joints when pavement is placed by the project on both sides of the joint. Questions? Are you ready for your written test? October 2014 49
Questions? If no questions, We will test now. 50