nc flat and elongated specs on aggregate

RECOMMENDED GUIDE SPECIFICATIONS FOR LONG LIFEKnow More

b Coarse Aggregate Flat and Elongated Particl The maximum amount of flat and elongated particles in coarse aggregate for SMA is shown in the table below of Flat and Elongated Particles 20 Flat and Elongated by Count 5 1 max to min ASTM D4791 Section 84 5 c Coarse Aggregate Soundness for SMA The percent degradation of the source...

PHYSICAL PROPERTIES OF AGGREGATESKnow More

Physical Properties of Aggregates 21 Flat Elongated Particles Superpave Aggregate Specifications Required on total aggregate blend Not individual aggregate stockpil Physical Properties of Aggregates 44 4 Steps of Superpave Mix Design 2 Design Aggregate Structure 3 Design Binder Content 4...

Aggregate Tests for HotKnow More

Flat or Elongated Particles in Coarse Aggregate ASlM D4791 This method determines the percentages of flat or elongated particles in coarse aggregates which are defined as those particles of aggregate having a ratio of width to thickness or length to width greater than a specified value...

FLAT OR ELONGATED PARTICLES IN COARSE AGGREGATEKnow More

FLAT OR ELONGATED PARTICLES IN COARSE AGGREGATE North Dakota Department of Transportation Materials Research SFN 51700 3-2020 Project PCN District Engineer Contractor Submitted By Date Sampled Material Specification Size or Class Sample From Field Sample Number Pit Location Sand Gravel Aggregate Pit Owner B Original Weight Total Sample...

DETERMINING FLAT AND ELONGATED PARTICLESKnow More

DETERMINING FLAT AND ELONGATED PARTICLES TxDOT Designation Tex-280-F Effective Date February 2005 1 SCOPE 11 Use this test method to determine the percentage of flat and elongated particles in coarse aggregat Flat and elongated aggregate particles interfere with compaction and can result in harsh difficult to place materials...

Proportional Calipers Device for Aggregates TestingKnow More

Shape characteristics of coarse aggregates are important when determining the performance of materials or mix Proportional Calipers are timesaving devices used for the rapid determination of percentages of flat and elongated particles in coarse aggregate fractions of 3/8in 95mm or larger Units are constructed of durable plated steel precision-tooled for accuracy...

Aggregate Presentation Porosity Construction AggregateKnow More

Particle shape has a significant effect on properties of concrete Natural sand and gravel are generally round and smooth Crushed aggregate may have shapes that are flat elongated angular cubical disk or rodlike Typical Shapes of Aggregat Typical shapes of aggregat...

2012 Standard Specifications ManualKnow More

Flat and Elongated Pieces Use coarse aggregate meeting Table 1012-1 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 S95B Soundness...

Material Properties for Asphalt MixturesKnow More

311 Have no more than 10 flat and elongated particles based on a 5 1 ratio based on SC-T-77 312 Determine coarse aggregate Sodium Sulfate Soundness by AASHTO T 104 313 Determine LA Abrasion by AASHTO T 96 314 Determine Absorption by AASHTO T 85 315 The composition limits are master ranges of toleranc...

Standard Specification for Concrete AggregatesKnow More

13 This specification is also for use in project specifications to define the quality of aggregate the nominal maximum size of the aggregate and other specific grading requirements Those responsible for selecting the proportions for the concrete mixture shall have the responsibility of determining the proportions of fine and coarse...

Aggregate Properties and TestingKnow More

The following test procedures will be covered sampling aggregates materials finer than No 200 0075 mm sieve unit weight and voids in aggregate sieve analysis in fine and coarse aggregates reducing field samples of aggregate to testing size method for determining flat and elongated pieces in coarse aggregate Los Angeles abrasion...

MATERIAL SPECIFICATION FOR AGGREGATESKnow More

LS-608 Determination of Percent Flat and Elongated Particles in Coarse Aggregate LS-610 Organic Impurities in Sands for Concrete LS-614 Freezing and Thawing of Coarse Aggregate LS-616 Petrographic Analysis of Fine Aggregate LS-618 Resistance of Coarse Aggregate to Degradation by Abrasion in the Micro-Deval Apparatus...

NCAT Report 17Know More

European specifications were considered when developing the requirements of AASHTO M325 and typically require SMA aggregates to have no more than 30 percent Los Angeles abrasion loss and no more than 20 percent flat and elongated F E particles when measured at a 3 1 ratio of length to maximum thickness...

Aggregates for Use In ConcreteKnow More

Flat Elongated Angular Round Manufac- tured Bond Natural Band Coatings Roughness Bond to Paste Freezing and Thawing Workability and Water Requirement Aggregate Specifications ASTM C33 - Normal Weight Aggregates Size and Gradation 2/12/2015 11 Always read Materials section of an ASTM 22 Aggregate Size...

FLAT AND ELONGATED PARTICLES IN COARSE AGGREGATEKnow More

FLAT 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 11...

AggregatesKnow More

Rough-textured angular and elongated particles require more water to produce workable concrete than smooth rounded compact aggregate Consequently the cement content must also be increased to maintain the water-cement ratio Generally flat and elongated particles are avoided or are limited to about 15 percent by weight of the total aggregate...

5 Aggregate Specifications and RequirementsKnow More

A flat and elongated piece is defined as one having a ratio of length to thickness greater than five The method for determining the actual percentage of flat and elongated pieces is described in test method ASTM D 4791 Dolomitic Aggregates There is a special requirement to be met when dolomitic coarse aggregates are specified in HMA These...

4 Aggregate Specifications and RequirementsKnow More

on the number of flat and elongated piec Section 90403 sets the limits for the number of flat and elongated piec A flat and elongated piece is defined as one having a ratio of length to thickne ss greater than five The test method for determining the actual percentage of elongated pieces is ASTM D 4791 Dolomitic Aggregates...

DEVELOPMENT OF A MIXTURE DESIGN PROCEDURE FORKnow More

flat and elongated particle ratio showed excellent correlation with aggregate breakdown 4 in a SMA mix the percent passing the 475 mm sieve must be below 30 percent to ensure proper stone-on-stone contact 5 the percent passing the 002 mm sieve did not show a correlation with...

nc flat and elongated specs on aggregate Ore plantKnow More

May 30 2013 0183 32 FLAT PARTICLES ELONGATED PARTICLES OR FLAT AND ELONGATED Flat and Elongated Particles of Aggregate Superpave specifications require hot mix asphalt to have less than 10 flat and elongated particles using a 5 1 ratio FLAT AND ELONGATED PARTICLES IN COARSE AGGREGATE FLAT AND ELONGATED PARTICLES IN COARSE Set the proportional...

SECTION 20110 BALLAST AND WALKWAY AGGREGATEKnow More

Sep 30 2011 0183 32 B Ballast/walkway aggregate shall be crushed stone broken by the crusher and have at least 2 broken surfaces angular rough-surfaced clean and free of sand loam clay flat elongated soft or disintegrated pieces and other deleterious substanc 1 The Ballast/walkway aggregate shall conform to the property...

Coarse Aggregate AngularityKnow More

This test is used to help ensure that the resulting HMA mixture will be resistant to deformation under repeated loads Specifying a minimum percentage of coarse aggregate angularity can also be used to obtain improved durability for aggregates used in surface treatments and to obtain increased friction and texture for aggregates used in pavement surface cours...

Combined effect of flaky and elongated aggregates onKnow More

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...

Definition of Flakiness index and Elongation index CivilKnow More

Apr 07 2013 0183 32 Elongated particl The particles whose greatest dimension is greater than 18 times the mean size dimension Mean size of aggregat Mean size of aggregates is defined as the mean of two seive sizes between which the particle is retained Mean size = Passing sieve size Retaining sieve size /2 Flakiness index...

Standard Test Method for Flat Particles ElongatedKnow More

11 This test method covers the determination of the percentages of flat particles elongated particles or flat and elongated particles in coarse aggregat 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...

NPTEL Civil EngineeringKnow More

Lecture 6- INTRODUCTION AGGREGATES 1 Download 7 Lecture 7- INTRODUCTION AGGREGATES 2 Download 8 Lecture 8- INTRODUCTION AGGREGATES 3 Download 9 Lecture 9- INTRODUCTION CONCRETE MIXTURE PROPORTIONING STRATEGIES Download 10 Lecture 10- INTRODUCTION CHEMICAL ADMIXTURES Download 11 Lecture-11 Portland...

Summary Aggregate Properties and the Performance ofKnow More

The percentage of flat and elongated particles has been related to volu- metric properties therefore changes in percentages of flat and elongated particles may be related to changes in volumetric properti However flat and elongated aggregate tests performed at the 5 1 ratio are generally insensitive to production changes in aggre- gate shape...

Flat and Elongated ParticlesKnow More

Flat and Elongated Particles - Pavement Interactive...

Why should flaky and elongated aggregates not be used inKnow More

Dec 25 2018 0183 32 Flaky means have less thickness elongated means having more length Such aggregates have low crushing strength in most of the concrete produced other than high strength concrete loads are taken by aggregates only and cement acts as a binder ad...

Evaluation of the Specification for Flat and ElongatedKnow More

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 B...