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From page 129... ... D-2 NCHRP Project 9-29 Simple Performance Tester for Superpave Mix Design Equipment Specification For The Simple Performance Test System LIMITED USE DOCUMENT The information contained in this Document is regarded as fully privileged. Dissemination of information included herein must be approved by the NCHRP. Read the entire page →
From page 130... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-4 1.0 Summary 1.1 This specification describes the requirements for a testing system to conduct the following National Cooperative Highway Research Program (NCHRP) Project 9-19 simple performance tests: Test Method For Static Creep/Flow Time of Asphalt Concrete Mixtures in Compression Test Method for Repeated Load Testing of Asphalt Concrete Mixtures in Uniaxial Compression Test Method for Dynamic Modulus of Asphalt Concrete Mixtures for Permanent Deformation Test Method for Dynamic Modulus of Asphalt Concrete Mixtures for Fatigue Cracking Test Methods for each of these tests using the equipment described in this specification are presented in Appendix A, B, and C of this equipment specification. Read the entire page →
From page 131... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-6 a. Permanent Axial Strain in Flow Number Test. Read the entire page →
From page 132... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-8 2.0 Definitions 2.1 Flow Time. Time corresponding to the minimum rate of change of axial strain during a creep test. Read the entire page →
From page 133... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-10 4.6 If a hydraulic power supply is required, it shall be air-cooled occupying a foot-print no larger than 1 m (3 ft) Read the entire page →
From page 134... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-12 8.0 Deflection Measuring System 8.1 The Simple Performance Test System shall include a electronic deflection measuring system that measures the movement of the loading actuator for use in the Flow Time and Flow Number Tests 8.2 The deflection measuring system shall have a range of at least 12 mm (0.5 in) Read the entire page →
From page 135... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-14 10.2 The confining pressure cell shall be designed to allow the operator to view the specimen, the specimen mounted deformation measuring system, and the specimen end platens during testing. 10.3 Confining pressure shall be controlled by the computer control and data acquisition system. Read the entire page →
From page 136... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-16 between (0.5 and 10 sec) Read the entire page →
From page 137... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-18 12.3.11 The Flow Time Test Software shall provide the capability of retrieving data files and exporting them to an ASCII comma delimited file for further analysis. 12.3.12 The Flow Time Test Software shall provide a one page hard copy output with the following: 1. Read the entire page →
From page 138... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-20 12.4.8 The Flow Number Test Software shall prompt the operator through the Flow Number Test. Read the entire page →
From page 139... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-22 12.5.4 The control system shall have the capability to adjust the dynamic stress and contact stress during the test to keep the average dynamic strain within the range of 75 to 125 µstrain. Adjustment of the dynamic stress shall be performed during the ten conditioning cycles at each loading frequency. Read the entire page →
From page 140... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-24 • The uniformity coefficient for the deformations, UA % • The uniformity coefficient for the deformation phase angles, Uθ , degrees. Read the entire page →
From page 141... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-26 formula. The rate of change of the strain with respect to time is estimated using the following equation: tdt d titii ∆ − ≅ ∆− ∆+ 2 ε ε ε (4) Read the entire page →
From page 142... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-28 13.2.4 The Flow Number is reported as the cycle at which the minimum value of the smoothed creep rate occurs. If there is no minimum, then the Flow Number is reported as being greater than or equal to the length of the test. Read the entire page →
From page 143... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-30 Where the regression coefficients can be used to calculate predicted values for each of the j transducers using the regression function: ( ) Read the entire page →
From page 144... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-32 13.3.11 The final part of the analysis involves calculation of several factors indicative of data quality, including the average drift for the deformations, the average standard error for the deformations, and uniformity coefficients for deformation amplitude and phase: %100 * Read the entire page →
From page 145... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-34 16.0 Documentation 16.1 The Simple Performance Test System shall include an on-line help and documentation. 16.2 A reference manual completely documenting the Simple Performance Test System shall be provided. Read the entire page →
From page 146... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-36 1 Scope 1.1 This test method covers testing and measurement of the resistance to tertiary flow of cylindrical asphalt concrete specimens in a triaxial state of compressive loading using the Simple Performance Test System. 1.2 In this test, a cylindrical sample of bituminous paving mixture is subjected to a static axial load. Read the entire page →
From page 147... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-38 8.1.3 Turn on the Simple Performance Test System, set the temperature control to the desired testing temperature and allow the testing chamber to equilibrate at the testing temperature for at least one hour. 8.1.4 When the dummy specimen and the testing chamber reach the target temperature, open the testing chamber, remove a test specimen and platen assembly, and quickly place it in the testing chamber. Read the entire page →
From page 148... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-40 Annex B Simple Performance Test System Flow Number Test Adapted From Test Method for Repeated Load Testing of Asphalt Concrete Mixtures in Uniaxial Compression NCHRP Report 465, 2002 NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-41 1. Scope 1.1 This test method covers testing and measurement of the resistance to tertiary flow of cylindrical asphalt concrete specimens in a triaxial state of compressive loading using the Simple Performance Test System. Read the entire page →
From page 149... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-42 4. Summary of Method 4.1 A cylindrical sample of bituminous paving mixture is subjected to a haversine axial load. Read the entire page →
From page 150... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-44 8.2.2 Encase the dummy specimen in a membrane. 8.2.3 Place the specimen and platen assembly in the environmental chamber with the dummy specimen, and monitor the temperature of the dummy specimen to determine when testing can begin. Read the entire page →
From page 151... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-46 Annex C Simple Performance Test System Dynamic Modulus Test Adapted From Test Method for Dynamic Modulus of Asphalt Concrete Mixtures for Permanent Deformation and Test Method for Dynamic Modulus of Asphalt Concrete Mixtures for Fatigue Cracking NCHRP Report 465, 2002 NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-47 1. Scope 1.1 This test method covers testing of asphalt concrete mixtures to determine the dynamic modulus and phase angle. Read the entire page →
From page 152... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-48 stress and the resulting axial strain response of the specimen at each frequency is measured and used to calculate the dynamic modulus and phase angle for each frequency. The test can be performed either with or without confinement. Read the entire page →
From page 153... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-50 9.2 Confined Tests 9.2.1 Assemble each specimen to be tested with platens and membrane as follows. Place the bottom friction reducer and the specimen on the bottom platen. Read the entire page →
From page 154... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-52 Annex D Specification Compliance Test Methods for the Simple Performance Test System NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-53 Table D1. Summary of Specification Compliance Tests. Read the entire page →
From page 155... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-54 Table D1. Summary of Specification Compliance Tests (Continued) Read the entire page →
From page 156... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-56 3.3 When performing verification of the deflection and strain measuring system, each transducer and associated electronics must be verified individually throughout it's intended range of use. 3.4 Mount the appropriate transducer in the micrometer stand and align it to prevent errors caused by angular application of measurements. Read the entire page →
From page 157... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-58 Annex E Minimum Testing Program For Comparison of a Non-Standard Specimen Deformation Measuring System to the Standard Specimen Deformation Measuring System NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-59 1.0 Summary 1.1 This Annex describes the minimum testing, analysis, and reporting required to demonstrate that a nonstandard specimen deformation measuring system produces the same dynamic modulus and phase angle results as the standard glued gauge point system specified in Section 9.0 of the these specifications. 1.2 The basic approach is to collect dynamic modulus and phase angle data on a single mixture using the simple performance test system with the standard glued gauge point system and the proposed alternative. Read the entire page →
From page 158... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-60 3.0 Dynamic Modulus Testing 3.1 Perform the dynamic modulus testing with the Simple Performance Test System in accordance with Annex C of these specifications. Repeat tests as needed to ensure that the data quality indicators are within their allowable ranges. Read the entire page →
From page 159... ... NCHRP 9-29 Equipment Specification for the Simple Performance Test System Version 1.1 August 30, 2003 D-62 where sp 2 = computed sample variance for the proposed system ss 2 = computed sample variance for the standard system Region of Rejection: For the sample sizes specified, the test statistic must be less than 2.82 to conclude that the variances are equal. 5.2 Summarize the resulting test statistics for dynamic modulus and phase angle. Read the entire page →

From page 129...

... D-2 NCHRP Project 9-29 Simple Performance Tester for Superpave Mix Design Equipment Specification For The Simple Performance Test System LIMITED USE DOCUMENT The information contained in this Document is regarded as fully privileged. Dissemination of information included herein must be approved by the NCHRP.