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May 08 2013 · Objective For determination of flakiness index of coarse aggregate where the size of the coarse aggregate are larger than 63mm Reference Standards IS 2386 Part I – 1963 – Method of test for aggregates for concrete Part I Particle size and shape Equipment Apparatus Thickness gauge Sieves 63 50 40 315 25
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IS sieves of sizes 63 50 40 315 25 20 16 12510 and 63mm A balance of capacity 5kg readable and accurate up to 1 gm Theory of Flakiness Index and Elongation Index Tests The particle shape of aggregates is determined by the percentages of flaky and elongated particles contained in it
SECTION 423 LEAN MIX ASPHALT 42301 GENERAL This section is a supplement to Standard Section 407 Asphalt and covers special requirements for lean mix asphalt that Flakiness Index 40 max Total Marginal and Unsound Rock Content 15 by Mass max Grading Limits and Production Tolerances for Aggregates
95 mm Nominal Maximum Size Aggregate Mixes Noncarbonate plus 32 mm particles must comprise a minimum of 100 of the total aggregate by weight with adjustments to equivalent volumes for materials of different specific gravities Additionally a minimum
Apr 07 2013 · Mean size of aggregates 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 size2 Flakiness index The percentage by weight of flaky particles present in a given test sample Elongation index
Sep 12 2011 · An aggregate with a maximum size of 14 mm is also used mainly for precast aggregate 5 down Normally not more than 10 should be retained on a 5mm sieve and preferably not more than 10 should pass a 150 µ m sieveNote Where the fine aggregates are predominantly of one size eg dune and beachsands
In this experiment the flakiness index was found to be 19 which is less than the specified limit of 40 while the elongation index was found to be 8 which is also within the limit of 15 Therefore the given sample would be approved for use in concrete mixtures
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’’ – 38’’
D Adjustment of Flaky aggregates Flakiness index test is Applicable on those aggregate sizes bigger than 63 mm This process is carried out when the aggregate proportions such as coarse fine and dust is identified In order to determine the effect of flakiness index on the bituminous mix a number of aggregate
No absorption limits are specified in AS 27581 but it is noted that the average absorption of normal weight aggregate is about 2 It is also noted that higher values may be acceptable based on local experience Changes in water absorption may indicate potential
FLAKINESS INDEX As per TMH1 B3 shall not exceed 35 on each of the 26519mm fraction and 19132mm fraction FRACTURED FACES All faces shall be fractured faces Alluvial colluvial gravels shall be crushed so that at least 50 by mass of the fractions retained on each standard sieve 475mm and larger shall have at least one fractured face
Sep 24 2010 · The elongation index of an aggregate is defined as the percentage by weight of particles whose greatest dimension length is 18 times their mean dimension This test is applicable to aggregates larger than 63 mm This test is also specified in IS2386 PartI However there are no recognized limits for the elongation index
4500 Mm 95100 2650 Mm 2240 Mm 6080 1120 Mm 4060 475 Mm 2540 236 Mm 1530 60000Micron 822 7500Micron 08 Materials finer than 425 micron shall have Plasticity Index PI not exceeding 6 The final gradation approved within these limits shall and shall not vary from the low limit on one sieve to or vice versa
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Assessing the Impact of Aggregate Quality on Flexible Pavement Flakiness Index FI 16 Aggregate Crushing Value ACV 7 aggregate which Enkulu aggregate production site Sieve size mm Retained gm of Retained wt of pass of Pass Specification limit 25 0 0 5050 100 100 19 1515 3 48985 97 85100
Design of Rigid Pavement 32 Aggregate Design of Rigid Pavement Aggregates form the major portion of pavement structure and they form the prime materials used in pavement construction Aggregates have to bear the wheel load of the vehicles and
Sep 24 2010 · The elongation index of an aggregate is defined as the percentage by weight of particles whose greatest dimension length is 18 times their mean dimension This test is applicable to aggregates larger than 63 mm This test is also specified in IS2386 PartI However there are no recognized limits for the elongation index
Often the Flakiness Index test is applied to singlesized aggregates ie an aggregate contained within a size range dD for which Dd 2 In this case it is possible to calculate a formula equivalent to Equation 7 that gives instead the approximate number of particles that should be tested
KRIDL Quality Control Register Part1 Page 1 KARNATAKA RURAL INFRASTRUCTURE Flakiness Index of Aggregate Test 1 Sample No Date of Sampling Name of QuarryLocation Date of Testing gm Size of aggregate Wt of the 40 mm 20 mm 125 mm 63 mm 100 40 mm
LIST OF TABLES Table No Description Page No 76 Gradation of Aggregates with Upper Limit in DBM percentage Passing vs IS Sieves 123 FI Flakiness Index 25 FDD Field Dry Density 26 GPS Global Positioning System 27 GSB Granular Sub Base 28 GHT Generalized Hough Transform
Water absorption limits on aggregates Limits on aggregate water absorption are rare though they may be useful to link to an undesirable concrete property such as freezethaw susceptibility as water absorption is easily determined Historically it is not known the source of the limits
Figure 4 The Flakiness Index test gauge and Flakiness Index the one on the bottom is the more commonly used test slotted sieves Aggregate for sprayed bituminous surfacing – The requirements of AS 27582 2009 Flakiness Index Samples are prepared and tested in accordance with AS 114115 The various fractions of the sample are between
Difference between Crushed Aggregate Properties from Combined and Individual Waste Sources Vivian W Y Tam1 and C M Tam2 Abstract Owing to the comprehensive building redevelopment programmes in Hong Kong there is a huge volume of concrete waste generated that will soon exhaust all the available landfill areas As
Aggregate with a LA value of less than 30 LA 30 is considered strong enough for use in coating and road surface treatments ie surface dressing Railway Ballast The test is modified to test railway ballast in that 5kg of 3240 together with 5kg of 4050 is placed in
aggregate material finer than 75µm material finer than 2µm This section also covers the requirement for shape in coarse aggregate either by Misshapen Particle test or Flakiness Index test • Section 9 Requirements for durability In this section limits are given based on the worst exposure classification A
SPECIFICATIONS FOR SUPPLYING AND PLACING BACKFILL 10 DESCRIPTION The Work shall consist of 1 Processing loading hauling unloading placing and compacting backfill material 40 mm 95 – 100 20 mm 35 – 70 10 mm 10 – 30 5 mm 0 – 5 Flakiness Index MRBA216 MicroDeval CSA A23229A ASTM D 6928
40T27T11short19 Aggregate 121 Pub October 2019 SIEVE ANALYSIS OF FINE AND COARSE AGGREGATES FOP FOR AASHTO T 27 MATERIALS FINER THAN 75 µM NO 200 SIEVE IN MINERAL AGGREGATE BY WASHING FOP FOR AASHTO T 11 Scope A sieve analysis or ‘gradation’ measures distribution of aggregate particle sizes within a given sample
A new practical method for determining the LA abrasion value for aggregates based on several parameters including the material grading liquid limit plasticity index California Bearing Ratio flakiness index permeability and LAV limits b S5 S6 S10 S13 and S17 which have the same 20mmaggregate size but different material