Determination Of Aggregate Impact Value Discussion And Conclusion Aggregate Impact Value Test – Civil Engineering Sri Lanka In construction of roads the aggregates should be in standard of RDA To check that Aggregate impact value test is performed If the AIV value is greater than 30
Dec 15 2017 · Classification of aggregates using Aggregate Impact Value is as given below Aggregate Impact Value Classification 20 Exceptionally Strong 10 – 20 Strong 2030 Satisfactory for road surfacing 35 Weak for road surfacing 5 5 APPARATUS 1 Aggregate Impact Value Test Machine 2 BS test sieve 3 A metal tamping rod 4
The apparatus used for determining aggregate impact value of coarse aggregates is Impact testing machine conforming to IS 2386 Part IV 1963IS Sieves of sizes – 125mm 10mm and 236mm 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
Sep 12 2015 · The aggregate impact test is carried out to evaluate the resistance to impact of aggregates Aggregates passing 125 mm sieve and retained on 10 mm sieve is filled in a cylindrical steel cup of internal dia 102 mm and depth 5 cm which is attached to a metal base of impact testing machine
An aggregate specimen is compacted into a steel cylinder fitted with a nofriction plunger The specimen is then loaded via the plunger The load crushes the aggregate to an extent depending on the crushing resistance of the material It is measured by a sieving test on the crushed specimen and it is a measure of the aggregate crushing value ACV
Impact and Crushing Value Aggregate Crushing Value ACV Sets UTA0630 Aggregate Crushing Value ACV Set Ø 150 mm BS UTA0640 Aggregate Crushing Value ACV Set Ø 75 mm BS The Aggregate Crushing Value ACV Test Set measures how resistant an aggregate is when being crushed under a gradually applied compressive load
Jan 12 2017 · The aggregate impact value is a calculation of the resistance to abrupt impact bang or shock which may vary from its resistance to steadily applied compressive weight Procedure The test specimen includes the aggregates of size ranging from 100 mm 125 mm Aggregates can be dehydrated by warming them at temperatue of 100110° C for a timeframe of 4 hours and spread to
Aggregate Impact Value AIV test BS 812 Part 3 1975 A surface dry standard size 14 10 mm aggregate sample is placed in a cylindrical cup of prescribed dimensions and compacted The sample is subjected to 15 blows of a hammer 135 15 kg diameter 100 mm falling freely over a height of 380 mm while the time interval between the blows is maintained to be at least 1 second
Transcript of AGGREGATE IMPACT TEST In this test we knew the percentage or wear for the aggregate used in the test The percentage of wear vary between 10 to 45 We got the percentage of wear of the aggregate between 10 to 45 which is 2838 Sothe aggregate that used had the average strength and had an average resistivity against the abrasion
their disintegration due to impact This characteristic is measured by impact value test 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 3 APPARATUS The apparatus of the aggregate impact value test as per IS 2386 Part IV – 1963
Jun 22 2014 · The test sample consists of aggregates passing 14 mm and retained on 10 mm sieve Wash the sample and dry at 100 to 110 °C for four hours and cool to room temperature Fill the cylindrical measure with the aggregate sample and tamp with 25 blows of tamping rod
Los Angeles abrasion test on aggregates is the measure of aggregate toughness and abrasion resistance such as crushing degradation and disintegration This test is carried out by AASHTO T 96 or ASTM C 131 Resistance to Degradation of SmallSize Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine
Aggregate Impact Value Test The aggregate impact value gives a relative measure of the resistance of an aggregate to sudden shock or impact which in some aggregates differs from Its resistance to a slow compression load The Indian Standard CODE IS 2386 Part IV – 1963 is used for procedure and classification of aggregate by result
The results obtained show that ACV value for aggregates are 2504 2270 3613and 3789 for crushed granite slag hoggin allin aggregate and river gravel respectively
Test Concept The LA abrasion test measures the degradation of a coarse aggregate sample that is placed in a rotating drum with steel spheres Figure 7 As the drum rotates the aggregate degrades by abrasion and impact with other aggregate particles and the steel spheres called the "charge"
Feb 08 2012 · The mean of the two test results is reported as the aggregate abrasion sion The aggregate abrasion test given above is rapid and easy to perform except for the preparation of testspecimen which is difficult and time consuming This test is however carried out commonly in a few other countries
In addition 288 laboratoryprepared Marshall specimens were made and tested Four aggregate sources with a range of LA values from 28 to 55 were selected for this study Four different compactive efforts ie 25 50 75 and 100 blows per side were used to prepare the specimens
Sep 24 2010 · 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 125 mm sieves and retained 10 mm sieves are filled in a cylindrical measure of 115 mm diameter
This characteristic is measured by impact value test 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 apparatus weight 30 kg
The aggregate crushing value ACV of an aggregate is the mass of material expressed as a percentage of the test sample which is crushed finer than a 236 mm sieve when a sample of aggregate passing the 132 mm and retained on the 950 mm sieve is subjected to crushing under a gradually applied compressive load of 400 kN 2 APPARATUS
Discussion of aggregate impact value test Products As a leading global manufacturer of crushing grinding and mining equipments we offer advanced reasonable solutions for any sizereduction requirements including Discussion of aggregate impact value test quarry aggregate and different kinds of
Impact value of an aggregate test gives ''an idea'' of toughness of the aggregate to resist fracture under the impact of moving load and BS 812 recommended that the AIV should be less than 30
aggregate impact value test discussion ciit Aggregate impact value apparatus Matest Used to determine the impact value of aggregates and select them for a given appliion The machine has a tripaction Advisory questions about the experiment determination of aggregate
Procedure Aggregate Impact Value Aggregate Impact Value The cup shall be fixed firmly in position on the base of the machine and the whole of the test sample will be placed in it and compacted by a single tamping of 25 strokes of the tamping rod The hammer shall be raised until its lower face is 15 in
شركة Shanghai A&C © 2000-2020 حقوق النشر. خريطة الموقع(
WhatsApp)
