· The flakiness index is defined as the percentage by weight of aggregate particles whose least dimension is less than times their mean size. Flakiness gauge (see Fig4) is used for this test. Test procedure had been standardized in India IS: 2386 partI). The elongation index of an aggregate is defined as the percentage by weight of particles whose greatest .
· Flakiness and the shape of coarse aggregate in general have an appreciable effect on the workability of concrete. An increase in angularity from minimum to maximum would reduce the compacting ...
The mass of all flaky particles (passing appropriate slots) as percent of the sample is the flakiness index. Meets BS 812. Void Content Apparatus, Fine Aggregates— H1680A. Use to determine the uncompacted void content of a fine aggregate sample. Indies the angularity, sphericality, and workability of fine aggregate in a mixture. Includes ...
· The elongation index of an aggregate is the percentage by weight of particles in it whose greatest dimension is more than times their mean dimension. It is measured by a length gauge. A combined value of flakiness and elongation index is to be determined for a sample of aggregates.
Fineness Modulus (FM) is used in determining the degree of uniformity of the aggregate gradation. It is an empirical number relating to the fineness of the aggregate. The higher the FM is, the coarser the aggregate is. Fineness Modulus is defined as the sum of the cumulative percentages retained on specified sieves divided by 100.
1. To determine Flakiness and Elongation indices, a sample of crushed coarse aggregate (5000 g) was separated into single sizes before Flaky and Elongated aggregate were identified and weighed for each size. Results are listed below. Based upon given information: A) Compute F1 B) Compute EL Can this aggregate be used to produce concrete with a ...
· Coarse aggregates of basalt and granite were used in the study. Flakiness index (FI) and shape index (SI) were determined using two methods: in accordance with the European Standard and with the use of digital image analysis (reference method). Based on the obtained results it was found that there is an appropriate relationship between the ...
· Flakiness test is an important test of, aggregate is important ingredient of concrete. Aggregate is how much flaky, it will acceptable or not, it is known by flakiness am representing here flakiness test. Flakiness Index If aggregate least dimension is less than 3/5th or of its mean dimensions, then it is called Flaky.
Trilab's specific aggregate testing range includes: Particle Size Distribution. Wet / Dry Strength Variation. Los Angeles value. Flakiness Index. Degradation Factor – Source Rock and Coarse Aggregate. Crushed Particles in Coarse aggregate derived from gravel. Average Least Dimension. Aggregate Crushing Value.
Hence we offer thickness gauge and length gauge to check flakiness and elongation index of the aggregate respectively. Model. Description. Flakiness Gauge SLAG001. Used for Determination of flakiness index of coarse aggregates. It consists of a steel frame with a sliding panel having slots of different dimensions. Send Enquiry Download Catalog.
· Flakiness index Describes the method for determining the flakiness index of coarse aggregates. References This document is referenced by: NR/L2/TRK/8100 Railway Ballast .
· The durability properties of concrete Mix4 (20RCFA) is assessed by immersing the concrete cubes for 28 days in the acid solution comprising 3% of Concentrated H2SO4 and sulphate solution Comprising 3% of Na2SO4. After 28 days of soaking, the concrete specimen is tested for its density and Compressive strength.
Flakiness index. 4. Determination of particle shape. Shape index. 5. Determination of percentage of crushed and broken surfaces in coarse aggregate particles. 6. Assessment of surface characteristics. Flow coefficient of aggregates. 7. Determination of shell content. Percentage of shells in coarse aggregates. 8. Assessment of fines. Methylene blue test. 9. .
· BS1241 specifies a Flakiness index not exceeding 30% irrespective of the aggregate size. Maximum permitted Elongated index is 35, 40 or 45% for aggregate sizes 2 ½'' – 2'', 1 ½'' – ¾'' ½'' – 3/8''. Both Flakiness and Elongation tests are not applicable to sizes smaller then ¼'' sieve. RELATEDTHEORY: SHAPES OF PARTICLES
Answer: The Elongation index of an aggregate is the percentage by weight of particles whose greatest dimension (length) is greater than ninefifths ( or 9/5 times) their mean dimension. It is measured on particles passing through mesh size of 63mm and retained on mesh size of Pro...