Jul 16, 2014· Aggregate impact value test gives an indication of aggregate’s toughness property (i.e. property of a material to resist impact) Aggregate impact values are used to classify the stone aggregates with respect to toughness property as given below. Aggregate impact value (%) Toughness Properties <10 Exceptionally tough / Strong 10 20 Very tough / Strong []
The aggregate impact value gives a relative measure of the resistance of the aggregate to sudden shock or impact. 7.6.5.2 Test specimen in a dry condition a) Sieve the entire dried test portion on the 14 mm and the 10 mm test sieve to remove the oversize and undersize fraction. Divide the
Feb 22, 2010· The aggregate impact value is a measure of resistance to sudden impact or shock, which may differ from its resistance to gradually applied compressive load. Procedure o f Aggregate Impact Test The test sample consists of aggregates sized 10.0 mm 12.5 mm. Aggregates may be dried by heating at 100-110° C for a period of 4 hours and cooled.
The apparatus used for determining aggregate impact value of coarse aggregates is Impact testing machine conforming to IS: 2386 (Part IV)- 1963,IS Sieves of sizes 12.5mm, 10mm and 2.36mm, A cylindrical metal measure of 75mm dia. and 50mm depth, A tamping rod of 10mm circular cross section and 230mm length, rounded at one end and Oven.
Aggregate Impact Value = W B W A × 100. Where, W A is Weight of oven-dried sample; W B is Weight of fraction passing through 2.36-mm IS Sieve; Reporting of Results. The mean of the two results shall be reported to the nearest whole number as the aggregate impact value of the tested material.
Jan 23, 2018· AIM: To determine the aggregate impact value of coarse aggregates as per IS: 2386 (Part IV) 1963. APPARATUS: i) Impact testing machine conforming to IS: 2386 (Part IV) 1963 ii) IS Sieves of sizes 12.5mm, 10mm and 2.36mm iii) A cylindrical metal measure of 75mm dia. and 50mm depth iv) A tamping
Dec 08, 2017· In this video,we will see the procedure of determining aggregate impact value as per IS 2386 PART4.
May 31, 2013· When batching, it is of critical importance to account for this water. Obviously, if the aggregates are in a surface wet condition, meaning the moisture content is greater than the absorption, that surface water increases the water-to-cement ratio and affects strength and durability.
⇒ If aggregate impact value is 20 to 30 percent, then it is classified as exceptionally strong strong satisfactory for road surfacing dry smooth and dry smooth and wet ⇒ Maximum daily traffic capacity of bituminous pavements is 500 tonnes per day 1000 tonnes per day 1500 tonnes per day
How is aggregate Impact expressed? What do you understand by dry and wet Impact value? Aggregate Impact value of material A is 15 and that of B is 35. Which one is better for surface course? The abrasion value found from Los Angeles test for two aggregates A and B are 50% and 38% respectively. Which aggregate is harder? Why? For what types of
Jan 23, 2018· AIM: To determine the aggregate impact value of coarse aggregates as per IS: 2386 (Part IV) 1963. APPARATUS: i) Impact testing machine conforming to IS: 2386 (Part IV) 1963 ii) IS Sieves of sizes 12.5mm, 10mm and 2.36mm iii) A cylindrical metal measure of 75mm dia. and 50mm depth iv) A tamping
Crushed aggregate response upon impact in dry and wet conditions Nikolaos Petropoulos1, Daniel Johansson1 and Erling Nordlund1 Abstract This paper presents results from a series of impact tests upon coarse-grained crushed aggregate. The material has been evaluated for two conditions, i.e. dry and wet (pendular state).
For dry sieving, values for the same four water contents were 100, 103, 90, and 88%, respectively. The detrimental effects also generally increased as aggregate size increased. Freeze‐thaw frequency and soil type had less effect on freeze‐drying disruption than did water content and initial aggregate size.
Dec 08, 2017· In this video,we will see the procedure of determining aggregate impact value as per IS 2386 PART4.
Sep 18, 2017· For deciding the suitability of soft aggregates in base course construction, aggregate impact test is commonly used. A modified impact test is also often carried out in the case of soft aggregates to find the wet impact value after soaking the test sample in water. Maximum allowable aggregate impact value of aggregate in different types of
Jan 17, 2019· If the resulting value is less than 0.1, the sample is considered sufficiently dry. However, if the value is greater than or equal to 0.1, the sample must be dried further. If additional drying is needed, repeat the same process as outlined above. The unit weight for a given volume of a sufficiently dry aggregate sample will be constant.
⇒ If aggregate impact value is 20 to 30 percent, then it is classified as exceptionally strong strong satisfactory for road surfacing dry smooth and dry smooth and wet ⇒ Maximum daily traffic capacity of bituminous pavements is 500 tonnes per day 1000 tonnes per day 1500 tonnes per day
AGGREGATE ABRASION VALUE This test helps to determine the abrasion value of coarse aggregates as per IS: 2386 (Part IV) 1963. The apparatus used in this test are Los Angles abrasion testing machine, IS Sieve of size 1.7mm, Abrasive charge 12 nos. cast iron or steel spheres approximately 48mm dia. and each weighing between 390 and 445g ensuring that the total weight of charge is
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How is aggregate Impact expressed? What do you understand by dry and wet Impact value? Aggregate Impact value of material A is 15 and that of B is 35. Which one is better for surface course? The abrasion value found from Los Angeles test for two aggregates A and B are 50% and 38% respectively. Which aggregate is harder? Why? For what types of
What about dry and wet impact value in aggregate test? Asked by Wiki User. 26 27 28. Answer. Top Answer. Wiki User Answered . 2013-03-18 14:11:15 2013-03-18 14:11:15.
Fines Value, Aggregate Impact Value, and Wet Attrition Value, have been withdrawn Aggregate Impact Value (Dry and Wet) of Kankar, Laterite, Dhandla. 408.2 » Learn More Pre: Cheapeast price dealers of grainder mixture
Jul 01, 1992· The laboratory tests performed included sorption tests, density, abrasion, slake durability, Iowa pore index, aggregate impact value, wet-dry cycles and chemical composition. The test results were subjected to bivariant correlation and multivariant stepwise regression-statistical analyses. The study revealed that the ratio of silica to oxides
number. Report the mean as the Aggregate Crushing Value, unless the individual results differ by more than 0.07 times the mean value. In this case repeat the test on two further specimens, calculate the median of the four results to the nearest whole number and report the median as the Aggregate Crushing Value. A data sheet is given as Form 7.7.1.