EXPERIMENT NO AIM :- To perform water absorption test ... - Raisoni

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EXPERIMENT NO AIM:- To Determine the impact value of a given a aggregate sample APPARTAUS:- FIGURE :- FORMULA:- Impact testing machine, aggregates, sieves, weight box, weighing balance Where, Impact Value = W3 / (W2 – W1) X100 W1 = empty wt of cylinder. W2= wt of Cylinder + aggregate. W3= wt of fines passing through 2.25 mm sieve
THEORY: - PROCEDURE: - OBSERVATION:- CALCULATION:- RESULT: - PRECAUTIONS:- DISCUSSION:- A test designed for to evaluate the toughness of stone or the resistance of aggregate to fracture under repeated impact is called impact test. The aggregate impact value indicates relative measur es of resistance of aggregate to impact, which has different effect then the resistance to gradually incr easing compression stress. The aggregate impact testing machine consists of a metal case and a cylindrical cap of internal dia of 10.2 cm and a depth of 5 cm in which the aggregate specimen is placed A hammer of weight 13.5 to 14 kg having a free fall from height 38 cm is arran ged to drop through a vertical height. (1)Aggregate specimen passing throu gh 12mm sieve retained on 10mm sieve is filled in the cylinder in 3 layers by tampin g each other or each layer by 25 flows and then measures it. (2)The sample is transferred from balance to cap of the aggregate impact- testing machin e. The metal hammer is raised to a height of 38cm.Above th e upper surface of the aggregate in the cap and is allowed to fall freely on the cap specimen After subjected to15blows of metal hammer, the crashed aggregate is sieved from 2.36 mm sieve and the sieved weight is noted. (1)Weight of empty mould = W1 = (2)Weight of mould + aggregate = W2 = (3)Weight of tines passing through = W3 = Impact Value = W3 / (W2 – W1) X100 The impact value of given sample of aggregate found out to be __________. (1)The aggregate used should be of good quality. (2)Hammer should be p roperly handed otherwise it may cause physical damage or injury. The impact value indicates the relative measurement of resistance of aggregate to impact, which has a different effect then th e r istance to gr adually increased compressive stress. The value less then 10 % to 20 % is satisfactory for wads. The aggregates should not have impact value more then 30 % & if it is used to say to be weaker for base course the value should not exceed 40%
Page 1 and 2: EXPERIMENT NO AIM :- To perform wat
Page 3 and 4: AIM :- EXPERIMENT NO To determine f
Page 5 and 6: (W2-W1 ) FIGURE :- (W2-W1 ) EXPERIM
Page 7: EXPERIMENT NO AIM: - To determine t
Page 11 and 12: THEORY :- Hence WORKING :- PROCEDUR
Page 13 and 14: The sub grade thickness is given by
Page 15 and 16: RESULT :- PRECAUTION :- The average
Page 17 and 18: THEORY :- PROCEDURE :- OBSERVATION
Page 19 and 20: OBSERVATION TABLE :- out . It is al
Page 21: OBSERVATION TABLE :- Ball No. Tempe

EXPERIMENT NO AIM :- To perform water absorption test ... - Raisoni

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