flat 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 (FE) particles to 20% or higher in .

FLAT OR ELONGATED PARTICLES IN COARSE AGGREGATE North Dakota Department of Transportation, Materials Research SFN 51700 (62019) 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)

5. Misshapen particles must be determined on the fraction of ballast retained on the mm test sieve using a 2:1 Calliper Ratio. The report must indicate each .

Flat and elongated particles 5:1, %, max Tex280F 10 Fine Aggregate Linear shrinkage, %, max Tex107E 3 Combined Aggregate3 Sand equivalent, %, min Tex203F 45 1. Not used for acceptance purposes. Used by the engineer as an indicator of the need for further investigation. 2. Only applies to crushed gravel. 3.

elongated, or flat and elongated particles per ASTM D4791. A flat particle is one having a ratio of width to thickness greater than 3; an elongated particle is one having a ratio of length to width greater than three (3). The aggregate shall have at least 90% by weight of particles with at least two fractured faces and

allowable flat and elongated (FE) particles. However, once production began, aggregate suppliers and asphalt producers worked together to produce the needed stockpiles. For the traveling public, the functional condition of the pavement is critical. SMA has a texture and appearance different than conventional hot mix asphalt concrete surfaces.

The flaky particles can affect the durability of concrete as they tend to be oriented in one plane, with water and voids forming underneath. The presence of flaky or elongated particles in excess of 1015% of the weight of coarse aggregate is undesirable. The test .

opportunities for describing shape and texture of particles in an automated fashion. Two independent systems are presented for capturing angularity and texture images and are analyzed with the help of the

Oct 01, 2016· Morphological characteristics of aggregate particles based on Superpave specifications for consensus properties,, flat and elongated particles (FE), coarse aggregate angularity (CAA) and fine aggregate angularity (FAA), were first determined.

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27 Changes note to read "A flat particle is one having a ratio of width to thickness greater than five (5); an elongated particle is one having a ratio of length

Flat and elongated particles in coarse aggregates, for some construction uses, may interfere with consolidation and be difficult to place. In this study, an experiment to evaluate properties of flat and elongated particles as coarse aggregate in concrete was conducted.

The aggregate shall not contain more than a total of 8 percent, by weight, of flat particles, elongated particles, and flat and elongated particles, when tested in accordance with ASTM D 4791 with a value of 5:1. Slag shall be aircooled, blast furnace slag, and shall have a compacted weight of not less than 70

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 479195, Flat

Flat, Elongated Particles (ASTM D4791) Scope: 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.

f) Flat or elongated piece requirement (1) < 8% (a) flat (b) elongated (c) flat and elongated (2) per ASTM D 4791 5:1 g) Slag (1) aircooled, blast furnace (2) compacted weight > 70 pcf (a) per ASTM C 29 3. Fine Aggregate a) clean, sound, durable, angular particles b) produced by crushing (1) stone or (2) gravel