Annexure PSTS31.1 Heavy Duty Dense Graded Asphalt

Transcription

1 Annexure PSTS31.1 Heavy Duty Dense Graded Asphalt Specific Contract Requirements Contract Number Note: Clause references within brackets in this Annexure refer to Clauses in the parent Technical Specification PSTS31 unless otherwise noted. 1 MINIMUM FREQUENCY OF TESTING (Clauses & 9.5.1) The minimum frequency for sampling/testing asphalt and for other testing associated with constituents, asphalt production, asphalt placing and finished pavement are listed in Tables 1A to 1E. Table 1A Minimum frequency of sampling/testing asphalt Normal Testing Level Quantity of Asphalt Supplied in Each Shift Less than or equal to 300 tonnes Minimum Frequency of Testing One per 100 tonnes or part thereof 301 to 600 tonnes One per 150 tonnes or part thereof Over 600 tonnes One per 200 tonnes or part there of Reduced Testing Level Quantity of Asphalt Supplied in Each Shift Less than or equal to 600 tonnes Minimum Frequency of Testing One per 200 tonnes or part thereof 601 to 1200 tonnes One per 300 tonnes or part thereof Over 1200 tonnes One per 400 tonnes or part there of Table 1B Constituents Clause Constituent Minimum Frequency of Testing as per Coarse aggregate PSTS Fine aggregate PSTS Reclaimed asphalt pavement (RAP) material PSTS109 and Table 1C Filler PSTS110 and Table 1C Binder MRTS17 and MRTS Bituminous emulsion tack coat AS 1160 Transport and Main Roads Specifications, July

2 Table 1C Asphalt production Clause Characteristic Test Method / Procedure Filler in asphalt Dry compacted voids Filler in asphalt Methylene blue value for the combined filler excluding hydrated lime Filler in asphalt Methylene blue value for the combined filler including hydrated lime Binder content Combined particle size distribution AS AS AS Q308A or AS/NZS Q308A or AS/NZS Minimum Testing Frequency of Testing design submission and monthly thereafter design submission and three monthly thereafter for materials typically having a methylene blue value 10 mg/g, and monthly thereafter for materials typically having a methylene blue value > 10 mg/g design submission and monthly thereafter for materials typically having a methylene blue value for the combined filler excluding hydrated lime > 10 mg/g As per Table 1A As per Table 1A Filler/binder ratio - As per Table 1A Binder film index Q317, AS or AG:PT/T237 VMA and air voids in laboratory compacted mix (120 cycles or 50 blows per face) Air voids in laboratory compacted mix (350 cycles) a) AS or Q305 b) Q307A or AS c) AS , Q306B or Q306C and d) Q311 or AS a) AS b) Q307A or AS c) AS , Q306B or Q306C and d) Q311 or AS design submission As per Table 1A design submission. Prior to 30/6/2015, the frequency thereafter to be nominated by the Contractor in the Asphalt Quality Plan. After 30/6/2015, the frequency shall be not less than once per shift. Transport and Main Roads Specifications, July

3 Clause Characteristic Test Method / Procedure Moisture content (only drum plants) Degree of particle coating Tensile Strength Ratio RMS T660 AS Q315 or AG:PT/T232 Minimum Testing Frequency of Testing As per Table 1A for the first production lot of the Works, and frequency thereafter to be nominated by the Contractor in the Asphalt Quality Plan As per Table 1A for the first production lot of the Works, and frequency thereafter to be nominated by Contractor in the Asphalt Quality Plan design submission, once during the first 2,000 tonnes or part thereof of production mix for each mix design, and thereafter one test per 5,000 tonnes or part thereof of the production mix (testing not required where the Works involves less than 100 tonnes of a particular nominal size mix) Resilient modulus AS One test with each mix design submission for mixes containing > 15% RAP and/or a WMA additive, and other mixes as requested by the Asphalt Mix Design Registrar Deformation resistance AG:PT/T231 One test with each mix design submission for mixes containing > 15% RAP and/or a WMA additive, and additional tests where nominated in Clause 3 of Annexure PSTS31.1. Fatigue life AG:PT/T233 One test with each mix design submission for mixes containing > 15% RAP Permeability Q304A One test with each mix design submission for AC14 and AC20 mixes. Production temperature of asphalt Frequency to be nominated in the Contractor s Asphalt Quality Plan Transport and Main Roads Specifications, July

4 Clause Characteristic Test Method / Procedure Minimum Testing Frequency of Testing Dispatch temperature of asphalt Each delivered load Table 1D Asphalt placing Clause Characteristic Test Method / Procedure Minimum Frequency of Testing 8.7 Pavement temperature 1 measurement every 2 hours 8.8 Temperature at initial compaction Each delivered load 8.9 Tack coat application rate Each lot 9.1 Homogeneity Visual assessment Each lot Table 1E Finished pavement Clause Characteristic Test Method Lot Size Min No. of Tests Min Frequency of testing 9.2 In situ air voids (mat) a) AS b) AS , Q306B, Q306C or Q306E c) Q307A or AS and d) Q311 or AS m² 1 N/A m² 3 N/A m² 4 N/A m² 5 1 per 500 m² > 5000 m² 10 1 per 1000 m² 9.2 In situ air voids (joints) a) AS b) AS , Q306B, Q306C or Q306E c) Q307A or AS and d) Q311 or AS Administrator may order tests if a nonconformance with joint compaction standard is suspended 9.3 Course thickness a) Coring or b) Measured dip As specified for in situ air voids 3 points on cross section per 50 m Transport and Main Roads Specifications, July

5 Clause Characteristic Test Method Lot Size Course position - Horizontal geometry 1 test per 50 m Min No. of Tests Min Frequency of testing Reduced levels at shoulder edges and lane lines (where applicable) Survey 1 test per 20 m 9.5 Surface shape Q712 a) Within lane: one measurement in longitudinal direction and 1 measurement in transverse direction every 60 m² b) Longitudinal joint excluding crowns: one measurement per 10 lineal metres c) Transverse Joint: One measurement in each wheel path in each lane except at the boundaries of the contract 9.6 Ride Quality Q708A, Q708B, Q708C, Q708D As defined in the relevant test method 2 BINDER (Clause 7.1.6) The following binder requirements apply. Location Nominal Mix Size Binder Class Binder Specification Where no indication is given, the contractor shall use a binder complying with the requirements of the Pavement Design Supplement. Transport and Main Roads Specifications, July

6 3 DEFORMATION RESISTANCE TESTING (Clause 7.2.7) Examples of where deformation resistance testing may be ordered are as follows: - Large scale / high risk projects where it is desirable to know the deformation resistance characteristics of the mixes at the commencement of the asphalt works. - New mix designs that do not have a track record of proven performance. Deformation resistance testing is required for the following mixes. 4 CRACK FILLING (Clause 8.2.3) Cracks are to be filled in the following areas. 5 STRAIN ALLEVIATING FABRIC STRIPS (Clause 8.2.4) Strain alleviating fabric strips are required in the following areas. Transport and Main Roads Specifications, July

7 6 MATERIAL TRANSFER VEHICLE (Clause 8.3) Technical Note 28 provides guidance on the appropriate selection and use of a Material Transfer Vehicle. A material transfer vehicle is required to be used for the following layers. 7 BRIDGE STRUCTURES (Clause 8.3) Load limits apply on structures within the Work as follows. STRUCTURE CHAINAGES DETAILS 8 PAVING IN ECHELON (Clause 8.3) An example of where paving in echelon may be specified is as follows: - A large scale project - The site is free from public traffic - The site does not have constrained site conditions and - Full width paving is possible Paving in echelon is required to be used for the following layers. Transport and Main Roads Specifications, July

8 9 PLACEMENT TRIAL (Clause 8.11) An example of where placement trial may be specified is a large scale/high risk project. A placement trial is required for each of the following layers. 10 RIDE QUALITY (Clauses & 9.6.2) A better ride quality (i.e. lower roughness count) costs more to achieve than a lower ride quality. Therefore it is important that an appropriate ride quality requirement is specified for the particular project involved. A maximum roughness count of 50 counts per kilometre typically applies on TMR roads. However, a lower maximum roughness count of 40 counts per kilometre may be specified in some instances (e.g. for heavily trafficked, high speed roads such as motorways, arterial roads and national highways). The surface evenness requirement for the Works shall be as follows. If no indication is given, a maximum roughness count of 50 counts per kilometer shall apply. 11 SUPPLEMENT REQUIREMENTS (Clause 11) The following supplementary requirements shall apply. Transport and Main Roads Specifications, July