Information Session: Update to TMR sprayed sealing documents

Transcription

1 Information Session: Update to TMR sprayed sealing documents Jason Jones Principal Engineer (Asphalt and Surfacings) Department of Transport and Main Roads 1 Our values, our diversity 2 1

2 Queensland Government s objectives for the community Advance Queensland 3 Our strategic plan 4 2

3 About us Creating a single integrated transport network accessible to everyone As at 30 June 2016 we manage: As at 30 June 2016: As at 30 June 2016 there were: 33,343km state-controlled roads 3.5m drivers licensed 5m vehicles registered 3,260 taxis licensed 180m in SEQ 12.1m outside SEQ trips taken annually on bus, rail, ferry and light rail 3,029 bridges 256,151 recreational vessel registrations 997,289 boat licenses 20 ports 3.63m customers served face-to-face at 59 Customer Service Centres Our customers conducted 6.68m online services 2.5m go cards in use Over 490,000 passengers travel on the south-east Queensland network on average each day 5 Agenda 1. Purpose of Information Session 2. MRS/ Overview 3. Details of MRS/ 4. MRTS18 Update 5. Sprayed Seal Design Supplement 6. Stakeholder feedback process. 6 3

4 Purpose of Information Session MRS11/MRTS11 Sprayed Bituminous Treatments Overview of the proposed changes Reasons for change MRTS18 Polymer Modified Binders Historical background Response to feedback TMR Sprayed Seal Design Supplement Historical background Development of Chapter MRS/ Overview Why update? Facilitate increased use of crumb rubber modified (CRM) binders Enable TMR Sprayed Seal Design Supplement Alignment with Austroads Feedback. 8 4

5 Overview Current state of play on TMR projects: A high percentage of seals use a polymer modified binder Typically S0.3B, S0.7S and S4.5S binders classes are specified TMR rarely specifies CRM binders S1.8R, S15RF or S18RF The number of alternative tenders using CRM binders has increased significantly over the last 2 years. 9 MRS/ Overview Potential benefits: Sustainability Performance Cost Capital Whole-of-life. 10 5

6 MRS/ Overview Considerations: Binder conformance Industry appetite and capacity Logistical challenges For TMR Cost competitiveness Performance Education Who is doing the seal design? TMR Contractor. 11 MRS/ Overview Considerations: How it could be implemented: Guidance for alternative tenders Mandate Permissive use Approach to be adopted: Contractor s seal design: Permissive use Principal s seal design: Principal nominates binder class Guidance for alternative tenders. 12 6

7 MRS/ Overview Assumptions: Seal design in accordance with TMR s Sprayed Seal Design Supplement using equivalent binders will provide equivalent outcomes Polymer factors What impact does polymer type and/or seal thickness have on seal life? 13 MRS/ Overview Other changes: Terminology changes: Binder classes Treatment types Binder handling requirements moved from MRTS11 to MRTS18 Pavement surface temperature requirements Additional guidance for selection of Period between bituminous treatments Removal of cutting tables: Guidance only Austroads/AAPA work tips Selection of cutter rates is the responsibility of the seal designer s delegate. 14 7

8 Update of MRTS11 Alignment of treatment types with Austroads 15 New terms: Initial treatment: Prime Initial seal replaces primerseal Secondary treatment: An application of a sprayed bituminous treatment over an initial treatment Retreatment: An application of a sprayed bituminous treatment on an existing bituminous surfacing 16 8

9 Treatment types to align with Austroads Treatment Type Treatment Label Initial Treatments Prime Initial Single/Single Seal Initial Double/Double Seal P I-S/S I-D/D Secondary Treatments and Retreatments Single/Single Seal Double/Double Seal High Stress Single/Single Seal for medium traffic loadings High Stress Single/Single Seal for heavy traffic loadings High Stress Double/Double Seal for medium traffic loadings High Stress Double/Double Seal for heavy traffic loadings S/S D/D HSS1-M HSS1-H HSS2-M HSS2-H 17 Treatment types to align with Austroads continued Treatment Type Treatment Label Secondary Treatments and Retreatments Extreme Stress Seal Strain Alleviating Membrane for slow moving cracks Strain Alleviating Membrane for rapid moving cracks Strain Alleviating Membrane Interlayer Waterproofing Seal under Asphalt 1 Geotextile Reinforced Seal with a Single/Single Seal Geotextile Reinforced Seal with a Double/Double Seal Surface Enrichment Scatter Coat XSS SAM-S SAM-R SAMI WP-A GRS-S/S GRS-D/D SE SC 18 9

10 Acceptable binder classes Treatment Type Technical Specification Acceptable Binder Class Initial Treatments Prime MRTS20 AMC00, AMC0 or AMC1 I-S/S or I-D/D MRTS20, MRTS17 AMC4, AMC5, AMC6, AMC7 or C Acceptable binder classes continued Treatment Type Technical Specification Acceptable Binder Class Secondary Treatments and Retreatments S/S or D/D MRTS17 C170 HSS1-M MRTS18 S0.25S, S0.7S, S0.3B, S1.8R or S15RF HSS1-H MRTS18 S0.7S, S2S, S1.8R or S15RF HSS2-M MRTS18 S0.25S, S0.3B, S1.8R or S15RF HSS2-H MRTS18 S0.7S, S2S, S1.8R or S15RF XSS MRTS18 S2S, S1.8R, S15RF 20 10

11 Acceptable binder classes continued Treatment Type Technical Specification Acceptable Binder Class Secondary Treatments and Retreatments SAM-S MRTS18 S0.25S, S0.3B, S1.8R or S15RF SAM-R MRTS18 S0.7S, S2S, S1.8R or S15RF SAMI MRTS18 S4.5S or S18RF WP-A MRTS18 S2S, S4.5S, S1.8R or S15RF GRS-S/S or GRS-D/D MRTS17 C170 SE MRTS20 AMC4 21 Method of specifying treatment. Principal s seal design: Binder class Cover aggregate nominal size(s) Estimated application rates Contractor s seal design: Treatment type Cover aggregate nominal size(s) 22 11

12 Annexure MRTS11.1 Update 23 New milestone: Notification of binder class: Contractor seal design and Principal supplied binder

13 Binder handling requirements moved from MRTS11 to MRTS17 and MRTS Ball penetration testing is required for initial seals on: Granular pavement (existing requirement) Stabilised pavement (new) Lightly bound pavement (new) 26 13

14 27 Default pavement surface temperatures (Cl.11.2): Temperature Previous d MRTS11 10 C Primes Primes 15 C Primer seals Cutback bitumen (other than primes), bitumen, multigrade bitumen and S35E; WP-A and SAMI seals placed over an existing seal or asphalt and overlaid with asphalt prior to trafficking 20 C Bitumen and PMBs S0.25S, S0.7S, S1.8R or, S15RF (excluding WP-A or SAMI seals placed in applications stated above); Geotextile reinforced seals 25 C Nil S2S, S4.5S or S18RF (excluding WP- A or SAMI seals placed in applications stated above) Cutting back binder (Cl. 12.7) Cutting tables removed Feedback has indicated they no longer reflect current practice Amount of cutter determined by the Seal Designer s Delegate Guidance: Austroads/AAPA Pavement Work Tips

15 Cover aggregate time limit (Cl.11.3): Previous MRTS11 Updated MRTS11 Primerseal 15 mins C170, M500, C mins Cutback bitumen, bitumen and multigrade bitumen 10 mins PMB including crumbed rubber binder 5 mins PMB including crumbed rubber binder 5 mins 29 Geotextile reinforced seals (Cl. 9): Reference to MRTS57 Geotextiles for Paving Applications added Sealing aggregate Main binder application Geotextile First binder application (bond coat) Weak or cracked base 30 15

16 MRS11 Update New serial of standard work items and relevant work operations introduced: Standard Item No. AAAA BBBB CCCC DDDD EEEE Description Seal design by the Principal Spraying bituminous material, treatment type [treatment type], binder [binder class], spray rate [spray rate], [including excluding] supply of binder, excluding supply of additives, [location] Spreading prime cover material [material], [spread rate], [including excluding] supply of prime cover material, [location] Spreading cover aggregate [size], [spread rate], [including excluding] supply of cover aggregate, [location] Seal design by the Contractor Initial treatment - Prime, [including excluding] supply of binder, [including excluding] supply of prime cover material [location] Initial treatment - Initial seal, Type I-[S/S D/D], cover aggregate size(s) [size(s)], [including excluding] supply of binder, [including excluding] supply of cover aggregate, excluding supply of additives, [location] Unit of Measurement litre m 3 m 3 m 2 m 2 31 MRS11 Update Standard Item No. FFFF GGGG Description Secondary treatment / retreatment - type [S/S D/D HSS1-M HSS1-H HSS2-M HSS2-H XSS SAM-S SAM-R SAMI WP-A], cover aggregate size(s) [size(s)], [including excluding] supply of binder, [including excluding] supply of cover aggregate, excluding supply of additives, [location] Secondary treatment / retreatment - type GRS-[S/S D/D], cover aggregate size(s) [size(s)], [including excluding] supply of binder, [including excluding] supply of cover aggregate, [including excluding] supply of geotextile [grade g/m²], excluding supply of additives, [location] Examples provided in guide notes Unit of Measurement HHHH Scatter coat, [including excluding] supply of cover aggregate m 2 General Work Items IIII P Supply and addition of adhesion agent (Provisional Quantity) litre JJJJ P Supply and addition of cutter oil (Provisional Quantity) litre KKKK P LLLL P Transport of bituminous material supplied by the Principal, [material], from [supply location] (Provisional Quantity) Return of excess bituminous material supplied by the Principal, [material], to [return location] (Provisional Quantity, if ordered) m 2 m 2 litre litre 32 16

17 MRS11 Update Methods of quantifying sprayed bituminous treatment (Cl.2.3): Seal designed by the Principal: Quantified by the materials used Seal designed by the Contractor: Quantified by area of seal applied Cutter oil, adhesion agent, and transport of Principal supplied binder scheduled as separated work items to ensure appropriate application and payment fairness For cutter oil and adhesion agent Provisional Quantity work items, limits of accuracy ± 100% Standard work item for supply of binder is removed from the standard work item list Supply of binder is included in relevant spraying or treatment work items and will not be quantified separately. 33 MRS11 Update Calculation of quantities (Cl. 2.4): Supply of binder is included in relevant spraying or treatment work items and will not be quantified separately Standard work item for return of excess bituminous material supplied by the Principal added. The quantity will be the actual quantity of bituminous material, at 15 C, returned by the Contractor, measured at the point of return Supply of materials (Cl. 2.5): Binder, aggregate materials, and geotextile can be supplied by either the Principal or the Contractor Cutter oil and adhesion agent is always supplied by the Contractor

18 MRS11 Update Return of excess Principal supplied bituminous materials (Cl. 4.1) Where the return work item omitted in the Schedule of Rates, the payment to be as agreed by the Administrator and the Contractor If an agreement cannot be reached, the Administrator will determine a rate based on quotations from a third party for work of a similar nature If the excess Principal supplied bituminous materials are contaminated or considered by the Administrator as unsuitable for return, these materials shall be dealt with as directed by the Administrator. 35 MRTS18 Update Why update? Deficiencies with TMR CRM binder requirements Alignment with Austroads binder classifications Sampling and testing requirements Insertion of EN07 conformance requirements Consultation: August September 2016 Feedback: Metropolitan, Wide Bay and Central West Districts Engineering and Technology Laboratory staff Australian Asphalt Pavement Association

19 MRTS18 Update Further amendments: Transfer of binder handling and storage requirements from MRTS11 to MRTS18 Records: binder composition Sampling: multiple transfers from a tanker during a single shift Point-of-delivery requirements: testing guidance for Administrators. 37 Sprayed Seal Design Supplement Why develop a Supplement? Which Austroads report? AP-T68 AP-T236 AP-T310 Link the Austroads reports together Deficiencies with AP-T68: Voids factor for very low volume roads Aggregate spread rates Flakiness index requirements for double/double seals Adjustment (Vt) to basic voids factor for traffic effects Ball embedment requirements Sprayed sealing with a variable rate spray bar Polymer factors for sprayed seal design Binders used for initial seals (primerseals)

20 Sprayed Seal Design Supplement Consultation: Sections 1-11: May-June 2016 Feedback from: Metropolitan District North Coast District Fitzroy District Darling Downs District South West Districts Australian Asphalt Pavement Association. 39 Sprayed Seal Design Supplement Further amendments: Address preliminary feedback Section 12: NACOE P36 project TMR practice for primerseals Release of AP-T310 in August 2016 Nonalignment between P36 findings and AP-T310. Project P36: Initial seals in Queensland AP-T310: Selection and Design of Initial Treatments for Sprayed Seal Surfacings 40 20

21 Sprayed Seal Design Supplement Issues with AP-T310: Recommendations vary significantly from historical TMR practices Binder selection for initial seals (primerseals) varies significantly across the state: Inconsistencies between TMR Districts Inconsistencies within the same TMR District A cutback bitumen selection table has been developed based on feedback: promote greater consistency between TMR Districts TMR has minimal experience with using polymer modified binders for primerseals Further guidance for: Foamed bitumen stabilised pavements Use of bituminous emulsion binders. 41 Sprayed Seal Design Supplement Typical grades of cutback bitumen used for initial seals TMR District Typical Winter Grade Typical Summer Grade Far North AMC6 AMC7 Northern AMC6 AMC7 North West AMC6 AMC7 Central West AMC5 AMC7 Fitzroy AMC6 AMC7 Mackay / Whitsunday AMC6 AMC7 North Coast AMC5 AMC6 2 Wide Bay / Burnett AMC6 AMC7 Darling Downs AMC5 1 AMC6 2 South West AMC5 1 AMC7 Metropolitan AMC5 AMC6 2 South Coast AMC5 AMC

22 Feedback on Specifications and Design Supplement Feedback: to: Template will be provided Provide examples / data / suggested wording changes as part of the feedback Proposed closing date: 14/04/ Thank you and stay connected LinkedIn Blog Department of Transport and Main Roads blog.tmr.qld.gov.au 44 22