what is impact value of coarse aggregate definition in singapore

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

Jan 09 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

13 Categories for maximum values of resistance to impact 18 14 Categories for maximum values of resistance to wear 19 basic set plus set 2 coarse aggregate product sizes in millimetres 28 In Singapore most if not all of the aggregates are imported For sources of supply coming from outside Singapore it may be difficult to find

The ‘ Aggregate Impact Value’ is the mean of two observations rounded to a nearest whole number Precautions Place the plunger centrally so that it falls directly on the aggregate sample and does not touch the wall of the cylinder in order to ensure that the entire load is transmitted on the aggregates

Experiment No 4 Determination of the aggregate impact value of different coarse aggregate samples 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

Aggregate impact value is used to classify the stones in respect of their toughness property as indicated below in Table 1 Table 1 Classification of aggregate based on aggregate impact value Aggregate impact value Quality of aggregate 10 Exceptionally strong 10 – 20 Strong 20 –

Feb 15 2019 · Aggregate impact value gives a relative measure of the resistance of an aggregate to sudden shock or impact As an alternative to crushing value the aggregate impact value should not exceed 45 by weight for aggregates used for concrete other than for wearing surfaces and 30 by weight for concrete for wearing surfaces such as runways roads for pavements

AGGREGATE IMPACT VALUE This test is done to determine the aggregate impact value of coarse aggregates as per IS 2386 Part IV – 1963 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

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 Aggregate impact value Calculation And uses SlideShare Aggregate impact value Calculation And uses 1

Coarse aggregate occupies 70 to 80 of the volume of concrete Aggregates are the material that the cement paste coats and binds together The quality of aggregates imposes a significant impact on the properties of concrete like workability strength weight durability etc