Minutes

KDOT/KAPA SPECIFICATION COMMITTEE MINUTES

10:00, NOVEMBER 1, 2022, PRAIRIE BAND CASINO

Attendees—Scot Moeder, Ross Weber, Jake Lauer, Rocky Seybert, Blair Heptig, BJ Cottman, Pat Short, Dan Scherschligt, Scott Swanson, Tony Menke, Jason Van Nice, Rick Barezinsky, Phil Wait, David Wilson, Justin Bayes, Richard Jurey, Greg Schieber, Dean Boatright

Item 1—Set Prices---------------------------------Jake Lauer

KDOT is open to revising set prices. There was discussion about certain set prices that are low and about having more set prices that vary by District. KDOT will send the list of set price items to KAPA, and Contractors will provide feedback on what adjustments should be made. All recommendations and supporting data should be sent to Jason Van Nice by December 1st.

Item 2—-Coring Language for Calibrations-------------------------------------- Jake Lauer

There has been some confusion about how to pay for calibration cores. At least one construction office thought that each set of 3 calibration cores should be paid for at the set price instead of paying for each individual calibration core at the set price. Jake Lauer proposed revisions to Section 602 of the specifications to help address this issue. KDOT thought the specification language was clear; however, the proposed revisions will be considered for the next specification update.

Item 3—Partnering Status-------------------------------------------- Scott Swanson

Instead of having partnering conferences at the Districts, a statewide partnering conference will be held in Wichita on February 21-22, 2023. District partnering conferences will resume in 2024 like normal.

KDOT is going to convene a consultant inspection feedback meeting. Turnaround time on test results will be discussed. There was a recommendation to develop an inspection checklist so that expectations are clearly defined.

It was emphasized that the pre-construction meeting should be utilized to discuss partnering objectives.

Item 4—Buy America--------------------------------------------------- Rick Barezinsky

Based on the information contained in the Buy America, Build America Act (BABA) of the Infrastructure Investment and Jobs Act (IIJA), materials in asphalt mixes are exempt. These include the aggregates, binder, and additives. Suppliers on the pre-qualified lists have been sent information requesting that they provide a certificate stating that their product meets BABA. If we received that statement, then the product will have an “X” in the “Meets BABA” column on the PQL. The contractor will need to provide statements on federally funded projects that other materials used on a project meets BABA or it will not be paid. This takes effect in the November 2022 letting.

Item 5—$40/ton Air Void and Density Pay Adjustment------------------------ Blair Heptig

The $40/ton price for pay adjustments has not been changed for a long time, and it no longer reflects the actual material cost of HMA. The consensus was that $75/ton is a more reasonable value for current conditions. KDOT will consider changing the price for pay adjustments. A decision should be made by the end of 2022.

Item 6---Same Day Mill and Fill------------------------------------------------- Blair Heptig

Many 1R projects recently have been same day mill and fill jobs. Production becomes tied to the mill on these projects, at least to some degree, which adds cost. Also, on thin milling actions the mill is being paid for while it is idle for a large portion of the day. It would be helpful if the road could be milled a least a couple days prior to paving, when feasible. Not only will this help with production, but it will also improve the tack coat bond since traffic helps clean the milled surface. It was mentioned that milling ahead of time when going through towns helps with logistical issues with trucking and equipment.

KDOT headquarters will scrutinize decisions to specify same day mill and fill more on upcoming 1R tours.

Item 7—E-Ticketing Update----------------------------------------------------- Blair Heptig

e-Ticketing will be required on all HMA projects with the QC testing bid item starting with November 2022 letting. However, e-Ticketing will also be allowed for commercial grade HMA even if the QC testing bid item is not included on the contract. KDOT will upload all FY 2022 and FY 2023 projects into the portal this winter. Contractors will be expected to connect their tickets to the portal using the JOBSlip application.

Item 8—Release Agents---------------------------------------------------------- Blair Heptig

The use of diesel on the hopper of shuttle buggies and transfer devices needs to be avoided or at least minimized. Diesel strips asphalt binder off the aggregate. If this continues to be a problem, KDOT may specify the use of a pre-qualified release agent.

Item 9—AWP Pay Issues--------------------------------------------------- Greg Schieber

There have been some problems getting payments processed in a timely manner. Better communication on pay quantities and change order status is needed.

Item 10—Traffic Control on 4 Lanes------------------------------------------- Ross Weber

Do channelizers need to be pulled to the side of the road after 3 days (when not required at the end of each day)? KDOT will check with the Bureau of Traffic Engineering and report back to the committee.

Item 11—Approach Slabs------------------------------------------------------- Blair Heptig

There used to be a provision in Section 603 that excluded projects less than ½ mile in length from profilograph testing. This provision was removed with the 2015 update to the specifications manual. KDOT will consider whether to reinstate this provision and only use a 10’ straightedge to check for smoothness on short projects.

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KDOT/KAPA SPECIFICATION COMMITTEE MINUTES

August 9, 2022

District 5 Conference Room

Hutchinson, Kansas

Discussion Topics

1.What was the impact of accelerating the 1R lettings for FY 2023? (Schieber)

APAC

•Spread out the lettings, possibly July through December.

•The lab is busy in the summer and it’s difficult to evaluate the RAP samples and come up with preliminary designs for bidding.

•Early lettings help with materials coordination.

•Projects in a general area should be included in the same letting. This helps with scheduling and materials coordination.

•It can be difficult to pin down the exact dates or order of projects due to trucking and plant availability. If KDOT needs a proposed/tentative schedule to get an idea on inspection needs, it could be provided once all projects are let.

Cornejo

•The acceleration has caused some difficulties since lab personnel are busy in the field.

Venture

•No issue with the acceleration

•MR sheets 3 months ahead of time would be helpful.

•It is helpful to provide contractors a location/project summary when RAP samples are cut like is Districts 3 and 6 have done.

•It is difficult to pin down the schedule ahead of time since conditions are constantly changing.

Shilling

•The acceleration is helpful in terms of getting aggregates, but it was hard on the lab.

•Lighter lettings in July and August and bigger lettings September through December are preferred.

Pearson

•Understand difficulties that can arise when coordinating inspection needs at KDOT

2.e-ticketing discussion…internet connection and shutdown requirements, nomenclature and what information is required on the e-tickets, connecting projects to the portal. Where are contractors at on e-ticketing and setting up an API with Haul Hub? Are there any issues you would like to bring to KDOT’s attention? (Weber, Schieber, Heptig)

Concern had been raised at a previous specification committee meeting about the shutdown provisions in the e-ticketing specification. KDOT agreed to relax the provisions, which they did, but there are still some stringent provisions. The intent is to have an e-ticket system that feeds into the KDOT portal and to provide adequate internet connection at the plant. If that is done and there are issues getting the e-tickets in the portal, then hardcopy tickets should start being used and the contractor should not be shut down.

Tom Stivers said that there have been some system and/or cloud-based issues and not so much internet issues. Ross Weber said they have seen the e-ticketing connection to the portal go down for about half a day but then eventually the tickets show up.

Justin Bayes asked if there were any plans for e-ticketing millings or edge wedge. Sometimes RAP is weighed on an offsite certified scale, and e-tickets don’t work in that scenario. Greg Schieber said the next effort will likely be with Ready-mix concrete. Justin also asked about why KDOT is not doing more SY milling. District 1 has several SY milling jobs in FY 2022 and FY 2023, but the other Districts do not. KDOT will have more internal discussions on this topic. In terms of e-ticket requirements, Justin said that a list of required information with the nomenclature requirements would be needed if specific formats are required.

Blair Heptig said that he prefers that the contractor connect the project to the portal in JOBSlip. That way there is no confusion about what information KDOT has access to within the contractors e-ticketing system. KDOT will continue with bulk uploads of projects to the portal. Not all FY 2022 projects were uploaded, so contact Blair if any projects are missing.

Tom Stivers indicated there were some things on the e-tickets that are not currently required and that APAC has its own internal nomenclature requirements. Blair Heptig indicated that if there are specific nomenclature requirements needed by KDOT, dummy fields could be used so both KDOT and the contractor get information in the preferred format. This may require Haul Hub to update the API mapping.

Adam Wright said that there were issues determining spread rates when e-tickets were not available since the truck drivers were not carrying hardcopy tickets.

Greg Schieber said that KDOT will provide the contractors more guidance on nomenclature requirements and which fields are necessary.

3.Should the single point tolerance of ± 1.0% be changed on standard 3% air voids projects? (Moeder, Heptig)

The contractors indicated that the single point tolerance of ±1.0% on standard 3% air voids jobs can cause some issues with preproduction runs. If the contractor is slightly high on air voids, let’s say 4.2%, then the contractor is required to run another preproduction even though a small increase in asphalt content will put the air voids in spec. Another preproduction run may be waived by the DME since only a small change is needed, but this requires timely communication when an answer is needed ASAP. Timely communication has proven to be a problem at times. KDOT agreed to change the single point tolerance to -1.0% to +1.5% like it is on increased in-place density jobs with a target of 3.0% air voids. The HMA spreadsheets will be updated over the winter months and the specification change may be implemented by cost change order to all FY 2023 HMA projects. There was discussion about other single point tolerances, but KDOT felt that -1.5% was pushing it on the low end (rutting concerns) and +2.0% may require more substantial changes that could warrant another preproduction run.

4.We struggled with CIT certification this past season. Historically we signed up for a class/test date when we paid. This past year, we signed up and paid for the online class, then had to take the class before we signed up for the test. This led to classes being filled up, pushed back, or unavailable altogether. I would like to at least hear what KDOT’s plan is and/or discuss solutions to this issue we faced as well as see if other contractors faced similar issues. (Proehl)

Rick Barezinsky communicated information from Lora Kowach on this topic. KDOT will begin offering classes “on demand” that do not have a performance test requirement. Stormwater Compliance and QC/QA Asphalt are the exception. For the on demand classes there will not be a separate registration for the exam which can be taken any time after the student is enrolled. The on demand classes will be noted on the KSU Polytechnic website. Lora and Julie Wilson will be holding a Zoom meeting on September 29th to discuss changes to the CIT program. They requested that contractors and consultants involved with the registration of employees attend the meeting. Additional information about the meeting will be distributed through KCA and ACEC. KAPA, KAPA-KRMCA and ACPA will also be notified.

Scot Moeder asked whether a person becomes certified when the on demand test is completed or when the results are entered in the system. It is the date the test is taken as it has always been. If there is a failure then the student will have to wait about a week before the retest can be taken. Scot also asked if KDOT would consider IA witnessing for the performance requirement for new employees that need to be certified ASAP. Greg Schieber said KDOT would consider it and not just allow on a case by case basis.

Mark Weiser said there have been some issues getting people through radiation safety class. He said having the flexibility to administer the class himself like he did in 2020-2021 was helpful.

Travis Proehl commented that it would be helpful if NUC class was available year round with no shut down period.

Adam Wright said there has been some issues with registration since CMS DTMT Screen 295/296 is not available in AWP. Rick Barezinsky said IA witnessing records are contained in AWP. After the meeting Lora Kowach reported that there were issues migrating witnessing records from CMS to AWP. If a person was witnessed less than 2 years prior to certification expiration and before the transition to AWP, contact Lora and she will provide a witnessing record.

5.Discussion on late start dates...Projects with warm mix should be able to run past 10/15. (Spray)

Greg Schieber said that jobs with contract striping will be set up for working days to end on 11/15. KDOT will have more discussion on how to handle jobs with KDOT striping since KDOT striping crews typically start putting equipment away for the winter around then. There could be a penalty or some other repercussion if the job extends into November and is still not done. Alternatively, KDOT may consider no more KDOT striping on HMA jobs.

Darrin Petrowsky said that the October 15 deadline was partially due temperature limitations on the striping and not just the HMA.

Most of the Districts are allowing start dates to be moved this year if the job is likely to be completed in 2022.

6.KDOT has seen some performance issues at mainline tie-ins (bridges, ends of project) when a single lift of HMA is placed on top of PCCP (no spray paver). Moving forward, on projects with RCI and a two-lift overlay, the RCI will be carried through the transition, the first lift of dense HMA will be tapered down to 0 in the transition, and then the top lift of dense HMA will be paved through the transition. Does anyone else have suggestions on this? What about tie-ins on 2-lift overlays without RCI? (Heptig)

Blair Heptig shared a proposed transition detail for a 1” RCI + 3” overlay on top of PCCP. The transition should end at the approach slabs even though the detail indicated the bridge end. The 2.5” milling depth at the tie-in point could get into the approach slab reinforcement, and there is also the problem with paving over the expansion joint. This detail has prevented some of the early potholing that KDOT has seen on several recent projects, particularly in Districts 1 and 4. For a 3” overlay on top of PCCP, Blair proposed tapering the 1st lift from 1.5” to 1” in the transition and then paving the top lift 1.5” through the transition. This would also require a 2.5” milling depth at the tie-in point. If anyone has any input to share on this topic, please let Blair know. A 2.5” milling depth at the tie-in point could get into the longitudinal tie bars between mainline and the shoulder if the PCCP shoulders are 6” thick.

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KDOT/KAPA SPECIFICATION COMMITTEE MINUTES

10:00, APRIL 7, 2022, KAPA OFFICE

Attendees—Blair Heptig, Chris Leibrock, Dan Scherschligt, Greg Schieber, Jake Lauer, Jeff Barnes, Justin Bayes, Ross Weber, Scott Swanson, Todd Carlile, Scot Moeder, Tony Menke, Pat Short, David Wilson, Jason Van Nice, BJ Cottman, Phil Wait

There was discussion regarding changes to QC/QA requirements on FY 2023 projects where KDOT is unable to staff a lab inspector. At this time KDOT is considering having 6 sublots per lot instead of 4 on these projects (start at normal 750 ton sublots or potentially 1,000 ton sublots). District will perform the verification tests at the District lab, and general plant inspection duties may have to be performed by the road inspector. There is some concern about F&t comparisons, primarily on Gmm, due to variable binder absorption. There is also some concern about getting timely test results. If implemented, the adjusted QC/QA requirements will be added by a no cost change once it is known there will be an inspector shortage on a project.

Item 2—-34 Binders---------------------------------------Blair Heptig

KDOT would like to transition from mostly PG XX-28 virgin binders with 25% max RAP to mostly PG XX-34 virgin binders with 25% max RAP on FY 2023 1R projects. There is some concern this will have a significant impact on cost and supplier. Currently, other than PG 52-34, only FHR and Suncor supply -34 binders. These sources are a long haul to Districts 4 and 5. Contractors were generally supportive of this change but thought easing into this transition would be prudent. KDOT will provide general mix information on the FY 2023 1R list which will be distributed soon. KDOT requested that contractors provide feedback about which projects may be difficult to supply with -34 binder.

Item 3—KT-39 Sample Size----------------------------------Blair Heptig

There is a table in that specifies minimum sample by maximum aggregate size, but most have interpreted the table as referring to NMAS. AASHTO T 209 used to specify the minimum sample size by maximum aggregate size, but it was changed to NMAS in 2009. KDOT did not stay current with this change. The next update to Part V will revise the table in KT-39 to refer to NMAS. A 9.5 mm NMAS mix will require a minimum 1,000 g sample, a 12.5 mm NMAS mix will require a minimum 1,500 g sample, and a 19 mm NMAS mix will require a minimum 2,000 g sample (same as current practice). It was noted that KDOT deviates slightly from AASHTO which requires a minimum of 1,500 g for a NMAS of 12.5 mm and smaller and 2,500 g for a NMAS of 19 mm. It was also noted that most contractors utilize a 1,500 g sample for a 9.5 mm NMAS mix.

Item 4—Paving Side Roads and Entrances---Commercial Grade--------Blair Heptig

There have been requests to specify HMA for sideroads and entrances as commercial grade. KDOT will try to ensure this is done on FY 2023 projects. If a project gets advertised QC/QA mix for sideroads or entrances, inform KDOT and an addendum will be issued.

When one QC/QA mix is specified for mainline as well as side roads and entrances, the bid item cost is likely a weighted cost. Compensation at the bid item cost for overruns on side roads and entrances is likely not adequate. Also, it may not be appropriate to test the mix with QC/QA procedures when only low production side road and entrance construction is being done. If it is appropriate for project conditions (e.g. paving mainline and sideroad concurrently), the contractor has the option of having the mix tested with QC/QA procedures or with cold feed gradations.

Item 5—E-Gauge Combo--------------------------------------Blair Heptig

KDOT is exploring the use of Troxler’s 4540 E-Gauge Combo. Pross Engineering and District 2 have purchased the gauges and will utilize them on HMA projects this summer. The gauge has a low enough nuclear content that it is not regulated by the Nuclear Regulatory Commission. At this time it is unknown if KDHE will regulate the gauges. Since the nuclear source is utilized for the density reading only, KDOT’s position is that the gauge is acceptable for HMA densities but should not be used for moisture readings.

The gauge cannot be checked on the Validator, so stability and drift tests have to be performed instead. Also, the gauge has to be sent back to Troxler annually for calibration; it cannot be calibrated by a factory certified technician/company like Calibration Solutions.

There was a question about whether KDOT would allow the use of electronic density gauges on projects. KDOT is not going to allow them due to concerns about variability in measurements of dielectric properties.

Item 6---E-Ticketing---------------------------------------Blair Heptig

KDOT’s goal is for contractors to start utilizing e-Ticketing and the KDOT e-Ticketing portal on projects this summer with full implementation on QC/QA HMA project in 2023. A major benefit of e-Ticketing is safety. In the future the number of inspectors required for a project could be reduced if automated methods are available to identify trucks that are delivered to the paver.

The e-Tickets from the various e-Ticketing platforms get recreated in the KDOT portal where the inspector can accept or reject them. As far as KDOT knows, the portal does not send information about the status of the ticket in the portal back to the e-Ticketing system.

A draft e-Ticketing special provision was distributed to the group. The contractors indicated that providing clear truck numbers on both sides of the haul trucks was not a problem. There was some concern by contractors that the language requiring shutdown when the e-Ticketing system is not working is too restrictive. KDOT requested that contractors provide feedback on the draft special provision by the end of April.

Item 7—RCI Aggregate Tests---------------------------------Blair Heptig

Verification testing on the combined aggregates will be added to the sampling and testing frequency chart in Appendix B. These tests will have the same frequency as what is utilized for combined aggregates in QC/QA Superpave mix.

Item 8—BMD Update----------------------------------------Blair Heptig

KDOT’s goal is for contractors to start collecting data on FY 2024 projects. There was agreement that contractors should help shape the look of BMD in Kansas. Currently, IDEAL-CT is being investigated for cracking and IDEAL-RT is being investigated for rutting. There will be further research to determine if cracking and potentially rutting information may be able to be discerned from Lottman tests if some additional test data is collected as part of that test. There are many details to work out like requirements for sample preparation, timing, conditioning, equipment, etc. The contractors indicated that everyone using the same model of testing device is preferred to help minimize variability.

Item 9—Price Adjustment Payment--------------------------Dan Scherschligt

Pay adjustments and price adjustments should be paid out incrementally throughout the project. They should not be paid out once on the final pay estimate unless perhaps it’s a very small job. The contractors incremental payments are preferred and that cutting a check back to KDOT at the end of the project is no big deal. There was some discussion about how these adjustments will be handled differently in AWP (each items instead of lump sum).

Item 10—Open Discussion on Inspector Shortage---------------Dan Scherschligt

This topic was discussed in combination with the topic on adjusted QC/QA requirements on select projects. Reduced testing, at least by KDOT, is one way the issue may be addressed. There was also discussion about pay for KDOT inspectors versus the flexibility in pay for consultants.

Item 11—AASHTOWare CMS Implementation---------------Dan Scherschligt

The plan is for CMS to shut off April 22nd and AWP should be live in all Areas by May 16th. It is likely that pay estimates will not be able to be generated for over a month due to the switch. There was some concern about getting no pay for an extended period with cash flow issues that arise at the beginning of the season. KDOT agreed to pay “stored materials” for any materials including binder and mobilization for work anticipated to be completed up to June 1st. Requests for these payments need to be submitted to the KDOT Construction Office for the project and copied to Jason Van Nice (jason.vannice@ks.gov) before April 15th.

There was a comment that subcontractor approvals will have to be done on paper during the down time. Advanced requests can still be processed during the down time.

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KDOT/KAPA SPECIFICATION COMMITTEE MINUTES

9:00, NOVEMBER 3, 2021

VIRTUAL MEETING

Attendees—Blair Heptig, Dan Scherschligt, Greg Schieber, Jake Lauer, Justin Bayes, Phil Wait, Rick Barezinsky, Ross Weber, Waseem Fazal, Rocky Seybert, John Crofoot, Scott Swanson, Steven Houser, Tyler Francis, Tony Menke, BJ Cottman, Jason Van Nice, Brandon Hundley (guest)

Item 1—E-Ticketing Portal---------------------Greg Schieber/Brandon Hundley

The goal is to have majority implementation on HMA projects by calendar year 2023. Hardcopy tickets will still be required until full implementation is achieved. Ross described how e-ticketing helps achieve some efficiencies from a contractor perspective, and Greg emphasized the safety benefits for KDOT inspectors and ease of use with one portal for all types of systems. Brandon with HaulHub provided some background about onboarding to the portal.

Item 2—BMD Workshop and Implementation ---------------------Blair Heptig

FWHA will hold a BMD implementation workshop for Kansas on January 20 and 21 (two 3-hour sessions). Contractors are encouraged to attend and are to notify Dan or Blair if they plan to attend. KDOT is currently exploring IDEAL-CT for cracking and IDEAL-RT for rutting. These tests are easy to run compared to many other performance tests, and the equipment is relatively inexpensive. Benchmarking data is being collected by District 2 and by Research statewide. Industry was encouraged to help KDOT in this effort so they can help shape specification framework and ensure it is reasonable. After the meeting Blair distributed a summary of IDEAL-CT and IDEAL-RT results from District 2.

Item 3—Specification Changes Discussion-------------------------Blair Heptig

The updated special provision for Section 602 is being implemented in the November letting. There are two major changes – 1) separate RAP and RAS weights must be totalized at the plant, and 2) an increased joint density requirement of 91.0%. The special provision allows for alternate devices to be used for weighing materials at the plant like optical scanners. Blair described circumstances when the new joint density requirements will be modified on the MR sheet (only 90.0% density on unconfined joints or joints that are confined by 0.5” of mix except on increased in-place density jobs).

Item 4—WMA----------------------------------------------Tyler Francis

Tyler Francis referenced some studies that demonstrated the benefits of lower mixing temperatures. He also presented a proposed Oklahoma DOT draft special provision that provides pay adjustments based on mixing temperature. Discussion followed. No change or proposal for now in Kansas, basically a heads up.

Contractors asked KDOT to extend the seasonal limitations for establishing late start dates. WMA allows paving to extend well after October 15th.

KDOT Update---------------------------------------------Greg Schieber

• Local Consult Project Pipeline projects are to be announced in December followed by letting announcement next summer

• FY23 1R and set aside budget=$265 million, Heavy Preservation = $90 million

• FY22 tonnage = 3.1 million tons, FY23 tonnage = 3.5 million tons, approximately 2.8 million tons expected to be completed in 2021.

• Erosion control specification was to take effect in December letting, probably will be delayed.

• KDOT will be moving from the current PMS which is specific to KDOT to an off the shelf system to prepare for the eventual retirement of Rick Miller.

ITEM 5—Other Business

Dan Scherschligt gave a summary of upcoming conferences, specifically KU Asphalt conference and KCA Annual Meeting. KAPA Quality awards will be presented at the KU conference. Flexible Paving Division meeting will be combined with KAPA members meeting on Thursday, January 27.

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KDOT/KAPA SPECIFICATION COMMITTEE MINUTES

MARCH 25, 2021

VIRTUAL MEETING

Attendance: BJ Cottman, Blair Heptig, Chris Leibrock, Dan Scherschligt, Greg Schieber, Jake Lauer, Jason Van Nice, Jeff Barnes, Steven Houser, Tony Menke, Justin Bayes, Lee Ann Legge, Phil Wait, Rick Barezinsky, Ross Weber, Scott Swanson, Todd Carlile, Tyler Francis, Rocky Seybert, Scot Moeder

1. CIT Discussion – There were some glitches with the online courses; most issues have now been resolved. The overall failure rate was higher this year, likely due to the nature of online training. Superpave class had a particularly high failure rate, so there will be another online offering this spring. The plan for next year is to offer online training and testing and some in person training and testing.

A couple of Contractors expressed concern about requiring a person certified in Superpave to collect HMA samples. They noted it is not in their interest to have someone sampling incorrectly. They also pointed out that minimizing the amount of time the QC tester is collecting samples could help with QC operations at the plant. KDOT decided that specifications will be updated to allow non-certified people to collect HMA samples. Additional witnessing and checks on sampling procedures will likely be required for non-certified personnel.

2. WMA Mixing Temperatures – Tyler Francis gave a brief presentation on the benefits of lowering mixing temperatures on binder properties, mix properties and pavement life. Sustainability is also being evaluated. Ross Weber said APAC would work with Ingevity on collecting more data this summer. KDOT may consider a trial project with a mixing temperature pay adjustment in 2022.

3. Longitudinal Joint Durability – More roadways will require rumble strips based on recent updates to the rumble strip policy. This may cause more issues statewide with centerline joint durability. There was discussion on products, construction procedures, test methods and specification requirements to address durability concerns. Based on the discussion, KDOT is planning to increase the joint density requirement from > 90.00% of Gmm to > 91.00% of Gmm (or interior density minus joint density < 3.0 pcf) on FY 2022 projects. There will be additional discussion on this topic at the summer specification committee meeting.

Some of the Contractors plan on collecting cores on the joint this summer to compare with nuclear density results.

Spray pavers were brought up as a method to improve joint density. There was also some discussion on the use of spray pavers to address longitudinal cracking problems.

4. Mix Design Material Submittal – KDOT emphasized the importance of communicating with the Districts regarding material submittals for mix designs. Some Districts would like to have gyratory pills submitted as well as a separate sample of RAP for the project.

5. QC Lab Approval – KDOT will be looking over lab quality manuals and equipment calibrations much more than usual since an annual inspection by an AASHTO accredited lab is no longer required. KDOT is supposed to provide a formal approval of the QC lab. Formal approval of QC labs was an issue brought up by FHWA during a review of KDOT’s QC/QA procedures.

6. Tack Sampling – Tack samples should be collected from the transport truck and not the distributor since KDOT is evaluating the material provided by the supplier. If there are storage or handling issues, then KDOT may collect a sample from the distributor as a check.

7. Requirement for RAS – KDOT is seeing more and more national data regarding the negative effects of RAS. There was a proposal to only allow RAS as an option on jobs that permit up to 20% or 25% RAP, but this proposal did not gain traction.

Accurate proportioning of RAP and RAS is a concern of KDOT. The plan is to require separate RAP and RAS weights on FY 2022 projects. The plant controls will not have to make adjustments based on the individual weight measurements (controls can still be tied to total recycle material content). KDOT will schedule another RAS subcommittee meeting and present a draft specification at that time or will present the draft specification at the summer specification committee meeting. This draft will be similar to the draft presented at the last RAS subcommittee meeting.

8. RAP Milling Samples – KDOT was reminded about the importance of getting timely RAP samples. In previous years samples were not collected for some interstate and heavy preservation projects. These projects are being programmed earlier than in previous years, so that should help minimize the number of samples that are missed.

9. Partnering – Scott Swanson gave a partnering update.

10. CMS Update – KDOT is planning to go live with AASHTOWare Product (AWP) on November 1. Starting on October 22, no payments will be issued for 2 to 3 weeks during the transition from CMS to AWP.

11. Certifications – AWP can require materials certifications to be submitted prior to payment, but this option has not been turned on. There may be an audit to check that materials certifications are being submitted prior to payment.

12. Emerging Leaders – Dan Scherschligt shared some thoughts on a potential Emerging Leaders group.