5/5/2010· Coarse aggregate crushing value is the percentage by weight of the crushed material obtained when test aggregates are subjected to a specified load under standardized conditions. Aggregate crushing value is a numerical index of the strength of the aggregate and
5/17/2019· Aggregate crushing value is defined as the percentage by weight of the crushed (or finer) material obtained when the test aggregates are subjected to a specified load under standardized conditions, and the strength of the aggregate used in road construction is expressed by numerical index.
3/29/2021· Aggregate Crushing test (IS 2386(Part 4):1963 & BS 812–110:1990) Aggregate crushing test values indicates the strength of aggregate and hence it is very significant. Similarly we can say crushing value is the relative measure of resistance of an aggregate under gradually applied compressive loads.
In aggregate crushing test, if aggregate crushing value is less than 10, it signifies an exceptionally strong aggregate. While aggregate crushing value above 35 would normally be considered as weak aggregates.
It is recommended that the crushing value of aggregate should be less than 30%. If it is more than 30 % then 10% finer aggregate is suggested to use. The aggregate whose crushing value is less than 30% can be used for cement concrete road. The aggregate whose crushing value is
3/28/2021· 4 Aggregate Crushing test (IS 2386(Part 4):1963 & BS 812–110:1990) 4.1 Relevant codes for aggregate crushing test. 4.2 Apparatus required. 4.3 Aggregate crushing Test procedure. 5 Recommended crushing values
Aggregate crushing value = (B/A) x 100%.
9/5/2018· Recommended Aggregate Impact Test Values Aggregate Impact Value Classification <20% Exceptionally Strong 10 20% Strong 20-30% Satisfactory for road surfacing >35% Weak for road surfacing 50. AGGREGATE CRUSHING VALUE • I.S. 2386-PART 4 • Aggregate crushing value test on coarse aggregates gives a relative measure of the resistance of an
2/8/2012· The relationship between the aggregate sizes and the crushing values will however vary with the type 0[ specimens tested. When non-standard sizes of aggregates are usnd for the crushing test, (i.e. aggregate larger than 12.5 mm or smaller than 10 mm) the size of the cylinder, quantity of material for preparation of specimen size of IS sieve for
2/22/2010· Recommended Values of Specific Gravity and Water Absorption for Aggregates The specific gravity of aggregates normally used in road construction ranges from about 2.5 to 3.0 with an average of about 2.68. Water absorption shall not be more than 0.6 per unit by weight.
3/28/2021· Aggregate crushing test is done to find out the strength of aggregate which is the fundamental and essential components of concrete, flexible pavements, etc. More than 70 to 80 per cent of the volume of concrete is aggregate. Aggregates are a very important component of concrete, so the quality really matters when it comes to aggregates.
Item P-209 crushed aggregate base course63 Кб The fine aggregate shall have a minimum sand equivalent value of 35 when tested in accordance with ASTM D 2419. Sampling and Testing.The crushed aggregate base material shall be placed on the moistened subgrade in layers of uniform thickness with a mechanical spreader.
The aggregate crushing value is defined as a ratio of to the total weight of the sample expressed as a percentage.
The TFV values for the aggregates are 180kN, 150kN, 120kN and 100kN for slag, crushed granite, hoggin and river aggregate respectively. A regression correlation of ACV and TFV shows that Nigerian...
The aggregate crushing value provides a relative measure of resistance to crushing under gradually applied crushing load. The test consists of subjecting the specimen of aggregate in standard mould to a compression test under standard load conditions (Figure 1). Dry aggregates passing through 12.5 mm sieves and retained 10 mm sieves are filled
For other size fractions, a recommended method is described in an appendix to this standard. The method is not suitable for testing aggregates with an aggregate crushing value higher than 30, and in such cases the method for ten per cent fines value described in BS 812-111 is applicable.
9/5/2018· • The fineness modulus of an aggregate is roughly proportional to the average size of particles of the aggregates. • The F.M. varies between 2 to 3.2 for fine aggregate, between 5.5 to 8 for coarse aggregate and between 3.5 to 6.5 for all in aggregate.
Recommended Values of Specific Gravity and Water Absorption for Aggregates The specific gravity of aggregates normally used in road construction ranges from about 2.5 to 3.0 with an average of about 2.68. Water absorption shall not be more than 0.6 per unit by weight.
Percentage of flaky aggregate in the range of 10 mm to 6.3 mm is 15%. IRC recommended the Flakiness Index Value: IRC recommended the Flakiness index value for the road construction is below 35%. Hello, I am Mayur Prajapati.
9/1/2020· The values of the massive aggregates (B-OP-M, B-A-M, P) comply with road specifications. The recommended limits defined by different road technical specifications are as follows: USA (FHWA): LA ≤ 35 ; UK: LA ≤ 30–35; ; Spain: LA ≤ 20–25; M DE ≤ 20–25, depending on the heavy traffic category and type of road layer ).