Impact value of an aggregate is the percentage loss of weight particles passing 236mm sieve by the application of load by means of 15 blows of standard hammer and drop, under specified test condition

Sep 24, 2010· Impact test The aggregate impact test is carried out to evaluate the resistance to impact of aggregat 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 ,

Toughness is the property of material which indicate its capacity which impact in sudden Tougher the aggregate more suitable for wearing surface such as road surface Lower the impact value stronger the aggregate, again the impact these for good quality concrete , aggregate with lower AIV (Aggregate Impact Value) is prepared

76 Aggregate Impact Value 761 Scope The aggregate impact value gives a relative measure of the resistance of the aggregate to sudden shock or impact The particular purpose which an aggregate is meant to serve requires the aggregate to have a particular strength which is usually stated in the specification This test provides

Result Introduction measure of degradation of mineral aggregates of standard grading resulting from a combination of action including abrasion and grinding in a rotation steel drum containing a specific number of steel spher give a measure of aggregate hardness, as specified

Jul 14, 2018· Aggregate Impact Value Test AIV test is conducted to determine the Aggregate Impact Value of Coarse aggregate 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

aggregate impact value See AGGREGATE TESTS Source for information on aggregate impact value: A Dictionary of Earth Sciences dictionary

aggregate is allowed to pass through 236 mm IS sieve And the impact value is measured as percentage of aggregates passing sieve (W2) to the total weight of the sample (W1) Aggregate impact value = W1 W2 100 Aggregates to be used for wearing course, the impact value shouldn’t exceed 30 percent For bituminous

IMPACT VALUE OF AGGREGATE 1Objective 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 compressive load

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 – 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

Feb 08, 2012· Aggregate impact and 1 10 Aggregate Crushing Value TestINTRODUCTION The principal mechanical properties re~ired in road stones are Q satisfactory resistance to crushingunder the roller during construction and (jjI adequate resistance to surface abrasion under traffic

Dec 30, 2018· Aggregate Impact Value test determines the Aggregate Impact Value (AIV) of aggregates which provides a relative measure of the resistance of an aggregate to sudden shock or impact Resistance of the aggregates to impact is termed as toughness

Aggregate Impact Value test determines the Aggregate Impact Value (AIV) of aggregates which provides a relative measure of the resistance of an aggregate to sudden shock or impact

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

Dec 15, 2017· Aggregate Impact Value (AIV) is the percentage of fines produced from the aggregate sample after subjecting it to a standard amount of impact The standard amount of impact is produced by a known weight, ie a steel cylinder, falling a set height, a prescribed number of times, onto an amount of aggregate of standard size and weight retained in .

Impact test The aggregate impact test is carried out to evaluate the resistance to impact of aggregat 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

Experiment No 4: Determination of the aggregate impact value of different coarse aggregate sampl (BS 812) Scope & significance: Aggregate Impact Value The aggregate impact value gives a relative measure of the toughness or the resistance of aggregate sudden shock or impact is not proportional to the resistance to a slowly applied compressive load

Sep 04, 2013· In this test we will find out the percentage of the weight of the aggregate sample which gets crushed with respect to the total weight of the sample This percentage is known as the aggregate impact value and more the aggregate impact value less is ,

Mar 21, 2018· 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 Aggregate Impact Value {AIV} • AIV is the percentage of fines produced from the aggregate sample subjecting it to a standard amount of impact

The crushing test on aggregate gives a relative measure of the resistance of an aggregate crushing under gradually applied compressive load If the aggregate crushing value is less than 10, it signifies an exceptionally strong aggregate Whereas, if the crushing value is 35 or above, it would normally be considered as weak aggregat

Apr 10, 2019· Aggregate demand (AD) is the total demand for final goods and services in a given economy at a given time and price level Aggregate Demand Formula Aggregate Demand is the total of Consumption, Investment, Government Spending and Net Exports (Exports-Imports) Aggregate Demand = C + I + G + (X – M)

The Aggregate Impact Value Testing Apparatus is robustly designed to determine the Aggregate Impact Value (AIV) of aggregates which provides a relative measure of the resistance of an aggregate to sudden shock or impact The number of blows delivered to the sample is automatically documented by the counter that is fitted to the machine

Apr 04, 2019· This value is often used as a measure of economic well-being or growth Both fiscal policy and monetary policy can impact aggregate demand because they ,

Impact value of aggregate is an important test in your engineering labWhen you design pavements, the impact load is one of the challenging factors that you need to faceTo determine the aggregate impact value the required apparatus are given below

Jan 25, 2018· AGGREGATE IMPACT VALUE TEST AIM: To find Impact value of the given aggregate sample APPARATUS The apparatus consists of an impact-testing machine, a cylindrical measure, tamping rod, IS sieve, balance, tamping rod and oven PROCEDURE The test sample consists of aggregates passing 125 mm sieve and retained on 10 mm sieve and dried in an oven for four hours ,

No: AT-199 NAME: Aggregate Impact Value Test Apparatus Quality Standard: As Per IS 2386 (P-IV) Aggregate Impact Value Test Apparatus is used for determining the aggregate impact value The Sturdy Construction consists of a base and support columns to form a rigid framework around the quick release trigger mechanism to ensure an effective free fall of the hammer during test

AIV - Aggregate Impact Value Looking for abbreviations of AIV? It is Aggregate Impact Value Aggregate Impact Value listed as AIV , Aggregate Impact value (AIV) and Aggregate Crushing value (ACV) of coarse aggregates play major role in development of resistance in hardened concrete against impact and compressive loads, respectively

The value of aggregate impact test should not be more than 45% by weight of aggregates, used for concrete other than wearing surface An impact value 35% is permissible for the bituminous macadam Maximum permissible impact value for the water bound macadam is 40%

51 Impact Value, as determined using the standard 45 kg (10 lbm) hammer, has direct application to design and construction of pavements and a general application to earthworks compaction control and evaluation of strength characteristics of a wide range of materials, such as soils, soil aggregates, stabilized soil and recreational turf Impact Value is one of the properties used to evaluate .

Basically, the aggregates impact value is aggregate which provides a relative measure of the resistance of an aggregate to sudden shock or impact However, it can be explain as the aggregate crushing value which is defined as a ratio of the weight.