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ASTM D 4791 Standard Test Method for Flat Particles Elongated Particles or Flat and Elongated Particles in Coarse Aggregate 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
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2024 11 18 time the only national specification that references this test is the Superpave Specification which refers to Flat and Elongated Particles in Coarse Aggregate Flat and elongated particles of coarse aggregates have a tendency to fracture more easily than other aggregate particles When the coarse aggregate does fracture the gradation will likely
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ConnDOT specification allows for no more than 10 percent flat and elongated particles utilizing a 3 1 ratio It has been speculated that this specification may not be achievable by most HMA producers in Connecticut The research team evaluated specifications from numerous regional state agencies for comparison with the ConnDOT specification
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Method for Determining Flat and Elongated Particles in Coarse Aggregate SC T 77 1 Scope This method will be used to determine the percentage of flat and elongated Standard Size Of Processed Aggregate Hotel Pratap standards for flat and elongated particles in LS 607 Percent Crushed Particles in Processed Coarse Aggregate LS 608 The standard coarse aggregate minimum size specifiion of flat
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Jun 02 2024 specification of flat and elongated particles Two procedures Ashm A and Method B are presented in this standard Flat or elongated aggregate particles can if present in sufficient number 1 impede compaction or 2 affect HMA behavior by fracturing during compaction A flat and elongated piece is defined as one having a ratio of
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2 The maximum amount of flat and elongated aggregate with a ratio of 3 1 shall not exceed 12 percent as determined by ASTM D 4791 3 When blast furnace slag is used the weight per cubic foot shall be at least 70 pounds 4 For Type I II or IV cover coat material 90 percent by weight of the particles retained on the mm No 4
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Flat and Elongated Particles Flat and elongated particles are defined as the coarse aggregate particles which have a ratio of maximum to minimum dimensions greater than five 5 The percentage of flat and elongated particles is measured on the portion of the blended aggregate retained on the mm sieve by ASTM Standard Method of Test D 4791
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This indicates that material particles longer than say 41mm will be elongated particles and the particles thinner than say 13mm will be considered flat particles This means that the particles of the material 42mm long and will not qualify the test Similar with other groups separated with other sieves
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Flat and Elongated Particles Flat and elongated particles are defined as the coarse aggregate particles which have a ratio of maximum to minimum dimensions greater than five 5 The percentage of flat and elongated particles is measured on the portion of the blended aggregate retained on the mm sieve by ASTM Standard Method of Test D 4791
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This test method covers the determination of the percentages of flat particles elongated particles or flat and elongated particles in coarse aggregates The values stated in inch pound units are to be regarded as the standard except in regard to sieve size and the size of aggregate which are given in SI units in accordance with Specification E 11
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This research was conducted to determine if the specification for flat and elongated aggregates for use in Hot Mix Asphalt HMA in Connecticut can be reasonably achieved Currently the Connecticut Department of Transportation ConnDOT specification allows for no more than 10 percent flat and elongated particles utilizing a 3 1 ratio It has been speculated that this
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This specification covers the requirements for aggregates for use in surface treatment Quality control and quality assurance procedures and referee protocol are incorporated Significance and Use of Appendices Appendices are not a mandatory part of this specification unless invoked by the Owner Appendix 1006 A is a commentary appendix to provide designers with information on the
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Percent of flat and elongated particles 6 Clay lumps and friable particles b Fine Aggregate 1 Liquid limit 2 Plasticity index 3 Sand equivalent 4 Un compacted void content for HMA Type V 5 Clay lumps and friable particles 6 Soundness 7 Percent Natural Sand P 401 4 10/21 c Mineral Filler 1 Gradation 2 Plasticity Index 3 Organic content d Asphalt Binder The
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ASTM D4791 19 The particles shape of course aggregates influences the properties of some construction materials and may affect their placement and consolidation This test method provides a means for checking compliance with specifications that limit such particles or to determine the relative shape characteristics of coarse aggregates
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ASTM D 4791 Standard Test Method for Flat Particles Elongated Particles or Flat and Elongated Particles in Coarse Aggregate C SIGNIFICANCE AND USE Use ASTM D 4791 Section D APPARATUS Use ASTM D 4791 Section 6 Digital Caliper the caliper illustrated in Figure 1 shows another suitable device for this test method E TERMINOLOGY Use ASTM D 4791 Section 3 Section does not
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weighed 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 % of the weight of the sample
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What are four consensus properties of aggregates 1 coarse aggregate angularity CAA 2 fine aggregate angularity FAA 3 flat elongated particles causes segregation 4 clay content want minimum for maximum bonding What are three source properties of aggregates 1 toughness 2 soundness 3 deleterious materials
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The Total Percent Flat and Elongated Particles G Is the sum of the Percent Flat/Elongated Weighted Average Column E
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This research was conducted to determine if the specification for flat and elongated aggregates for use in Hot Mix Asphalt HMA in Connecticut can be reasonably achieved Currently the Connecticut Department of Transportation ConnDOT specification allows for no more than 10 percent flat and elongated particles utilizing a 3 1 ratio It has been speculated that this specification may not be
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Flat and Elongated Particles Flat and elongated particles are defined as the coarse aggregate particles which have a ratio of maximum to minimum dimensions greater than five 5 The percentage of flat and elongated particles is measured on the portion of the blended aggregate retained on the mm sieve by ASTM Standard Method of Test D 4791
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Price $ Description Specifications Questions Shape characteristics of coarse aggregates are important when determining the performance of materials or mixes Proportional Calipers are timesaving devices used for the rapid determination of percentages of flat and elongated particles in coarse aggregate fractions of 3/8in or
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This test method covers the determination of the percentages of flat particles elongated particles or flat and elongated particles in coarse aggregates The values stated in inch pound units are to be regarded as the standard except in regard to sieve size and the size of aggregate which are given in SI units in accordance with Specification E 11 The SI units in parentheses are for
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The presence of flaky or elongated particles in excess of 10 15% of the weight of coarse aggregate is undesirable The test is carried on aggregate sizes between 63 mm and mm Apparatus 1 A balance of accuracy of % of the sample weight 2 A set of sieves 3 A special scale for elongation index 4 A special scale for flakiness index Eng Mohammed Y Mousa Materials Lab Procedures
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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 non
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Specification Arahan Teknik Jalan 15 samples were prepared using Marshall Mix Design methods in order to determine the optimum asphalt content OAC The second stage of the research was to evaluate the performances of the mixture consist of flat and elongated aggregates 12 samples were prepared with different percentage of flat and elongated aggregate which is 0% as the standard mixture 20
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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 non Superpave applications
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and flat and elongated particles when tested in accordance with ASTM D4791 with a value of 5 1 Slag shall be air cooled 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 aggregate Fine aggregate shall consist of clean sound tough durable angular
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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 non Superpave applications Method B is a comparison of the
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