3.2.3.6 Aggregate Impact Value test as per IS: 2386- 4 (1963) This test was performed to determine the aggregate impact value of coarse aggregates. Impact testing machine was used. Cup of the machine was firmly fixed. Sample was placed in it and compacted with the help of tamping rod. 15 blows of hammer were given from 380 mm height.
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. The Indian Standard CODE IS 2386 (Part ...
Objective For determination of the aggregate impact value of coarse aggregate, which passes 12.5 mm. IS sieve and retained on 10 mm. IS sieve. Reference Standards IS: 2386(Part IV)-1963 Methods of test for aggregate for concrete Part IV Mechanical Properties. Equipment & Apparatus Aggregate Impact Test Machine Sieves (12.5mm,10mm) Cylindrical …
Then aggregate impact value is expressed as the percentage of fines formed in terms of the total weight of the sample. Observations:-Table: Impact value of sample aggregates. Observation. Trail 1. Trail 2. Total weight …
This report pdf fill download the impact of texas houston district and reporting pieces. Aggregate Crushing Value ACV Civil Engineering Laboratory Aggregate Crushing Value ACV The poverty Impact value gives a supreme measure on the. 51 Results from thin section analysis performed by Eirik Pettersen NGU.
Take 2.36-millimeter sieve and sieve the impact aggregate through it. Now, take a bowl and measure its weight (X). Put the passed dust of aggregate through 2.36 sieve into a bowl. Take the weight of the bowl again with the aggregate …
Aggregate Impact Value = W B W A ×100 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 …
3 Crushing value 17.2% 4 Impact value 12.50% 5 Fineness modulus 6.67% 6 Water absorption 1.00% 3.3 FINE AGGREGATE The locally available natural sand and machine-made Manufactured sand are utilized as fine aggregate. It is supposed to be free of clay, slit, organic impurities and so on.,
Procedure of Impact Value of Coarse Aggregate. The impact machine shall rest without wedging or packing upon the level plate.; The cup shall be fixed firmly in position on the base of the machine and whole of the test sample placed in it …
PDF | On Jan 1, 2001, Jaap de Koning published Aggregate impact analysis | Find, read and cite all the research you need on ResearchGate
Apparatus required for aggregate impact value test. 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. …
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 the toughness of the road aggregates and vice verse. If impact value is less than 10% then ...
Aggregate Impact Value. The test sample shall consist of aggregates the whole of which passes through ½ in B.S. test sieve and is retained on a 3/8 in B.S. test sieve. The aggregate comprising the test sample shall be dried in an oven for …
Aggregate Water Absorption Test. Water absorption gives an idea of strength of aggregate. Aggregates having more water absorption are more porous in nature and are generally considered unsuitable unless they are found to be acceptable based on strength, impact and hardness tests. Water absorption shall not be more than 2% per unit by weight.
For fine aggregate, no weight shall be in excess of 4 gm/in. 2 (7 kg/m 2). 3. Coarse Aggregates After the material has been sieved, remove each tray, weigh each size, and record each weight to the nearest 0.1 g. Be sure to remove any aggregate trapped within the sieve openings by gently working from either or both sides with a trowel or
for analysing the aggregate impact of ALMP is offered by a flow model approach of the labour market. However, other approaches such as VAR models are also treated in the paper. After …
Classification of aggregates using Aggregate Impact Value is as given below: Aggregate Impact Value Classification <20%.= Exceptionally Strong 10 – 20% .=Strong 20-30%. =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.
Crush samples having an impact value of 12.5% fall in the category of 10-20%, therefore, the aggregate test sample is classified as strong and can be seen in the table below. The aggregate impact value is useful for selecting the good aggregates for road construction. Aggregate appropriate for cement wearing course should have maximum AIV of 30%.
Digital Los Angles Abrasion Testing Machine: The machine consists of an electronic control unit and a rolled steel drum having an inside diameter of 711 mm and internal length of 508 mm. The drum is rotated at a speed of 31-33 r.p.m. The internal shelf provided with the machine confirms to ASTM, AASHTO and EN standards.
Lower values indicate aggregates which are tougher or more impact resistant and higher strength concrete aggregates will exhibit AIVs of less than about 20 per cent but very few will produce AIVs of less than 10 per cent.
The Aggregate Impact Value machine has been developed for determining the impact value of aggregates. Manufactured from plated steel against corrosion, a counter fitted to the machine automatically records the number of blows …
If impact value is less than 10% then aggregate is said to be exceptionally strong, if it is in range of 10 to 20% then they are good, aggregates having impact value less than 35% are considered satisfactory by the IRC (Indian Roads Congress). Apparatus Used:
1.Calculate for the aggregate impact value given the total weight of aggregates to be 2698 grams and 45 % of the total weight passed through the 2.36mm sieve and write the nature of the calculated impact value. 2.An aggregate sample has undergo sieve analysis test. Given the total mass of 1590 grams, the weight of aggregate sample retained on 1 ...
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.
AGGREGATE IMPACT TEST DATA ANALYSIS. Sample A B Aggregates Sizes 10 10 Weight of sample before crushed (g) (W1) 305 303. Weight of sample after crushed (passing 2 sieve)(W2) ... AGGREGATE IMPACT VALUE (AIV) CLASSIFICATION <20% Exceptionally Strong 10 – 20% Strong 20 – 30% Satisfactory for road surfacing >35% Weak for road surfacing. DATA ...
Fig 1: Aggregates used in production of concrete. The aggregates are broadly classified into two types based on the size, namely- fine aggregate and coarse aggregate. In this article, we discuss the properties of the standard …
2.1.2 Crushed Stone Sand - Fine aggregate produced by crushing hard stone. 2.1.3 Crushed Grace1 Sand - line aggregate produced by crushing natural gravel. . 2.2 Coarse Aggregate -- Aggregate most of which is retained on 4*75-mm IS Sieve and containing only so much finer material as is permitted for
The Aggregate Impact Value (AIV) (M2/M1)x100 19 % 23 %. AIV = M2/M1 * 100%. Average aggregate impact value of the sample is 21 %. DISCUSSION 1. Give the impact value of a good aggregate to ensure the strength of the. aggregate used in road construction. -Aggregate impact value is measure of toughness of aggregate.
The apparatus as per IS 2386 (Part-IV) 1993 consist of, Impact Testing Machine : A testing machine weighing 45 to 60 Kg and having a metal base with a heavy lower surface of not less than 30 centimetre in diameter. It is supported on plane and level concrete floor of minimum 45 cm thickness. The machine should have provision for fixing its base.
Aggregate Impact value Test. Theory and Concept on aggregate Impact value In physical meaning toughness is property of a material to resist impact . Due to movement of vehicle on the road the aggregates are subjected to impact resulting in their breaking down into smaller pieces. The aggregates should therefore have sufficient toughness to resist their …
1.2 Aggregate impact value test (AIV) The aggregates are exposed to impact d ue to the passage of . ... For the analysis of subjective service quality dimensions, a …
Absolute Value, Absolute value is an operation in mathematics, written as bars on either side of the expression. For example, the absolute value of −1 is written as… Exchange Value, Exchange value refers to "the power of purchasing other goods which the possession of [an] object conveys" (Smith [1776] 1960, p. 32); in other words…
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 …
The cup is fixed firmly in position on the base of the M1 - (M2+M3) 1.0 g 1.9 -1.7 -0.8 the aggregate impact value and more the aggregate impact value less is the hammer machine and the whole of the test sample from 2 32.7 31.5 33.4 To determine the aggregates toughness of the road aggregates and the cylindrical measure is transferred to the cup.
Aggregate Impact Value (AIV) = 𝑾 𝑾 × Calculate the mean of the two results to the nearest whole number. Report the mean as the aggregate impact value, unless the individual results differ by more than 0.15 times the mean value. In this case repeat the test on two further specimens,
The aggregates crushing value test should be performed as per IS code 2386 Part IV. First, fill the sample aggregate with one-third of the cylindrical measure in three layers. Each layer should be tamped 25times freely. After filling the sample aggregate, weigh and record it as W1. Now fill the aggregate in the mould along with the plunger on top.