specifiion of flat and elongated particles

  • Evaluation of the Specification for Flat and Elongated

    a maximum acceptable percentage of flat and elongated particles that a coarse aggregate blend may have before being ruled out as an acceptable source Regional state requirements for flat and elongated particles are shown in Table 1 Table 1 Regional States Flat and Elongated Specifications State Specification ASTM D4791, Method Bweighed to determine a percentage of flat, elongated, or flat and elongated particles in a sample Superpave specifications require hot mix asphalt to have less than 10% flat and elongated particles using a 5:1 ratio Apparatus Proportional Caliper Device Balance, accurate to 05% of the weight of the sampleFLAT PARTICLES, ELONGATED PARTICLES, OR FLAT AND11 This test method covers the determination of the percentages of flat particles, elongated particles, or flat and elongated particles in coarse aggregates Two procedures, Method A and Method B, are presented in this standard Method A is a reflection of the original procedure as developed prior to Superpave and is intended for all nonSuperpave applicationsStandard Test Method for Flat Particles, Elongated

  • Flat & Elongated Particles

    thickness If it does, the particle should be counted as flat and elongated (F&E) 36 Repeat 34 and 35 for each particle to be tested 37 Weigh the Flat and Elongated particles for each sieve sample to the nearest 01 gram and record in column (C) “Weight of Flat/Elongated Particles”specification of flat and elongated particles Mining Equipment Sales Companies Percentage of Fractured Particles shall be determined on the aggregateASTM D4791 PDF PDF DownloadFLAT AND ELONGATED PARTICLES IN COARSE AGGREGATE FOP FOR ASTM D 4791 Scope This FOP covers the determination of the percentage, by mass, of flat and elongated particles in coarse aggregates for comparison with specification limits This FOP can be performed in conjunction with AASHTO T 27/T 11FLAT AND ELONGATED PARTICLES IN COARSE

  • DETERMINING FLAT AND ELONGATED PARTICLES

    DETERMINING FLAT AND ELONGATED PARTICLES TXDOT DESIGNATION: TEX280F CONSTRUCTION DIVISION 2 – 3 LAST REVIEWED: SEPTEMBER 2014 42 Reduce the sample to an amount suitable for testing in accordance with Tex200F 5 PROCEDURE 51 Ovendry the sample to constant weight, at a temperature of 230 ± 9°F (110 ± 5°C)Flatandelongated particles are considered to be undesirable in HMA because they have a tendency to break or degrade during the construction process and under applied traffic Generally, throughout the country, very few coarse aggregates will fail the flat and elongated specification at a 5:1EVALUATION OF THE EFFECT OF FLAT AND ELONGATEDFlat and elongated particles will tend to lie flat during the compaction phase of emplacement, resulting in anisotropic properties and slip planes , and reducing(PDF) Measurement of flat and elongation of coarse

  • Evaluation of the specification for flat and elongated

    Evaluation of the specification for flat and elongated particles for use in hot mix asphalt in ConnecticutFlatandelongated particles are considered to be undesirable in HMA because they have a tendency to break or degrade during the construction process and under applied traffic Generally, throughout the country, very few coarse aggregates will fail the flat and elongated specification at a 5:1EVALUATION OF THE EFFECT OF FLAT AND ELONGATEDDETERMINING FLAT AND ELONGATED PARTICLES TXDOT DESIGNATION: TEX280F CONSTRUCTION DIVISION 2 – 3 LAST REVIEWED: SEPTEMBER 2014 42 Reduce the sample to an amount suitable for testing in accordance with Tex200F 5 PROCEDURE 51 Ovendry the sample to constant weight, at a temperature of 230 ± 9°F (110 ± 5°C)DETERMINING FLAT AND ELONGATED PARTICLES

  • (PDF) Measurement of flat and elongation of coarse

    Flat and elongated particles will tend to lie flat during the compaction phase of emplacement, resulting in anisotropic properties and slip planes , and reducing aggregate interlock 4Standard Test Method for Flat Particles, Elongated Particles, or Flat and Elongated Particles in Coarse Aggregate 11 This test method covers the determination of the percentages of flat particles, elongated particles, or flat and elongated particles inASTM D479110 Standard Test Method for Flat ParticlesFlat and Elongated Pieces Use coarse aggregate meeting Table 10121 for flat and elongated pieces when tested in accordance with ASTM D4791 on the No 4 sieve and larger with a 5:1 aspect ratio (maximum to minimum) for all pavement types, except there is no requirement for Types SF95A and S95B2012 Standard Specifications Manual 10 MATERIALS

  • waqtc tm 16 (19)

    particles in coarse aggregates for comparison with specification limits Flat and elongated particles of aggregates, for some construction applications, may interfere with consolidation and result in harsh, difficult to place materials and a potentially unstable mixture For purposes of this test procedure, the term “Elongated Pieces” in25 FLAT PIECES The crushed rock ballast shall not exceed 5 % by weight of flat and elongated particles and shall be determined in accordance with Method A of ASTM D4791 Flat and elongated particles are particles with the ratio between the largest dimension and the smallest dimension exceeding four (4) 26 ABSORPTIONCrushed Rock Track Ballast Specificationand flat and elongated particles, when tested in accordance with ASTM D4791 with a value of 5:1 Slag shall be aircooled, blast furnace slag, and shall have a compacted weight of not less than 70 pounds per cubic foot when tested in accordance with ASTM C29 bFine aggregate Fine aggregate shall consist of clean, sound, tough, durable, angularATTACHMENT B ELAINE SPRAUVE LIBRARY AND

  • The pros and cons of cone crusher applications Quarry

    When a cubical product shape is required, the following process controls when correctly applied to the crushing circuit will minimize the flat and elongated particles generated inside the cone crusher: 1 Keep the crusher chokefed Choke feed means to keep the head covered with at least 150mm of feed materialEvaluation of the specification for flat and elongated particles for use in hot mix asphalt in ConnecticutEvaluation of the specification for flat and elongatedFlatandelongated particles are considered to be undesirable in HMA because they have a tendency to break or degrade during the construction process and under applied traffic Generally, throughout the country, very few coarse aggregates will fail the flat and elongated specification at a 5:1EVALUATION OF THE EFFECT OF FLAT AND ELONGATED

  • DETERMINING FLAT AND ELONGATED PARTICLES

    DETERMINING FLAT AND ELONGATED PARTICLES TXDOT DESIGNATION: TEX280F CONSTRUCTION DIVISION 2 – 3 LAST REVIEWED: SEPTEMBER 2014 42 Reduce the sample to an amount suitable for testing in accordance with Tex200F 5 PROCEDURE 51 Ovendry the sample to constant weight, at a temperature of 230 ± 9°F (110 ± 5°C)Some states have recommended changing the definition of flat and elongated aggregates from 5:1 to 3:1 and an increase in the maximum allowable percentage of flat and elongated (F&E) particles to 20% or higher in the Superpave aggregate specificationFlat and Elongated Aggregates in Superpave RegimeFLAT AND ELONGATED AGGREGATES IN SUPERPAVE REGIME Some states have recommended changing the definition of flat and elongated aggregates from 5:1 to 3:1 and an increase in the maximum allowable percentage of flat and elongated (F&E) particles to 20% or higher in the Superpave aggregate specificationFLAT AND ELONGATED AGGREGATES IN SUPERPAVE

  • Investigation into Flat and Elongated Particles Ratio for

    Flat and elongated particle ratio is a shape characteristic for coarse aggregates used in pavements The ASTM D 4791 is the standard test method to determine flat and elongated coarse aggregate particles in asphalt mixes However, this method is subjective, making it less reliable to accurate measurementsFlat and Elongated Pieces Use coarse aggregate meeting Table 10121 for flat and elongated pieces when tested in accordance with ASTM D4791 on the No 4 sieve and larger with a 5:1 aspect ratio (maximum to minimum) for all pavement types, except there is no requirement for Types SF95A and S95B2012 Standard Specifications Manual 10 MATERIALSspecification of flat and elongated particles [randpic] Evaluation of the Specification for Flat and Elongated a maximum acceptable percentage of flat and elongated particles that a coarse aggregate blend may have before being ruled out as an acceptable source Regional state requirementspecification of flat and elongated particles

  • Crushed Rock Track Ballast Specification

    25 FLAT PIECES The crushed rock ballast shall not exceed 5 % by weight of flat and elongated particles and shall be determined in accordance with Method A of ASTM D4791 Flat and elongated particles are particles with the ratio between the largest dimension and the smallest dimension exceeding four (4) 26 ABSORPTIONand flat and elongated particles, when tested in accordance with ASTM D4791 with a value of 5:1 Slag shall be aircooled, blast furnace slag, and shall have a compacted weight of not less than 70 pounds per cubic foot when tested in accordance with ASTM C29 bFine aggregate Fine aggregate shall consist of clean, sound, tough, durable, angularATTACHMENT B ELAINE SPRAUVE LIBRARY AND

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