viva questions on aggregate impact value test|coarse aggregate impact test

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AI-enhanced. This document contains 25 sample viva questions for a Highway & Transportation Engineering lab exam. The questions cover topics like aggregate impact value, Los Angeles abrasion test, flash and fire points, specific .

Viva Questions: How aggregate impact value is expressed? How does toughness differ from compressive strength? Aggregate impact value material A is 20 and that of B is 45. Which one is better surface course and . 40 TOP Concrete Technology LAB VIVA Questions and Answers. 1. List out various tests on Cement? 2. List out various tests on Fine Aggregate? 3. List out various tests .Determination of Aggregate Impact Value - Impact Test on Aggregates is done to carry out to: Determine the impact value of the road aggregates, Assess their suitability in road .Concrete Technology LAB VIVA Questions :-. 1. List out various tests on Cement? 2. List out various tests on Fine Aggregate? 3. List out various tests on Coarse Aggregate?

It has been found that for majority of aggregates, the aggregate crushing value and aggregate impact values are numerically similar within close limits. For deciding the suitability of soft aggregates in base course .

percentage of aggregate value

percent aggregate impact value

To measure this characteristic, the impact value test is conducted. The test determines the aggregate's resistance to sudden impact or shock, which may differ from its .What is the aggregate impact value test? A relative measure of the resistance of aggregate due to the sudden shock or impact on it is called aggregate impact value. Based on the impact value, we can decide whether the coarse .The aggregate impact value test is done to test the compressive strength of aggregate when sudden and immediate impact force acted on it. It is expressed in percentage (%). It should be less for high impact bearing aggregate for .Experiment to Determine the aggregate impact value of different coarse aggregate samples, (BS 812), Aggregate impact value test, plain & reinforced concrete.

The average value of the two samples is the Impact Value of Aggregate. Lab Test Report Format. SI: Description: Sample 1 in grams: Sample 2 in grams: 1: Weight of dried sample (W1) 340: 360: 2: Weight of crushed particle passed . The Aggregate Impact Value (AIV) test, outlined in IS 2386 Part IV, evaluates the impact resistance of aggregates. This is performed with an impact testing apparatus, using a specific procedure and sample preparation . How is aggregate Impact expressed? What do you understand by dry and wet Impact value? Aggregate Impact value of material A is 15 and that of B is 35. Which one is better for surface course? The abrasion value found from Los Angeles test for two aggregates A and B are 50% and 38% respectively. Which aggregate is harder? Why?

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.The aggregates should therefore have sufficient toughness to resist 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.

coarse aggregate impact value

= 6.97%. And, hence, the finally aggregate impact value is 6.97 . Significance of impact test. The procedure of determining aggregate impact value is according to IS 2386. 7. How is aggregate Impact expressed? 8. What do you understand by dry and wet Impact value? 9. Aggregate Impact value of material A is 15 and that of B is 35. Which one is better for surface course? 10. The abrasion value found from Los Angeles test for two aggregates A and B are 50% and 38% respectively. Which aggregate is harder? Why?

Questions 1. How aggregate impact value is expressed? 2. How does toughness differ from compressive strength? 3. Aggregate impact value material A is 20 and that of B is 45. Which one is better surface course and why? 4. Which test simulates the field conditions better, aggregate crushing value test or impact value test? Procedure The aggregate sample: The material for the standard test consists of aggregates sized 10.0 mm to 12.5 mm.The aggregates must be in a surface dry condition before testing. The aggregates may be dried by heating at 100 oC – 110 o C for not more than 4 hours and cooled to room temperature before testing, if necessary.According to IS: 2386 (Part IV)- 1963 for the Aggregate Impact Value, the aggregates must pass through 12.5 mm sieve and retain on 10 mm IS sieve. It also gives details regarding the other tests also. Important Points. The permissible limits for aggregate impact values are:The document describes a procedure to determine the aggregate impact value through laboratory testing. The test involves subjecting aggregate samples to 15 blows from a falling hammer, then measuring the amount of material that passes through a 2mm sieve. Two aggregate samples were tested according to this procedure and found to have impact values .

advantages of aggregate impact test

Aggregate Crush Value sungardenrockanje.nl Viva Questions On Aggregate Crushing Value Test.concrete technology practicals aggregate crushing value test.crushing value of coarse aggregate definition.gravel and crushed stone that are used with a.Check price.aggregate crushing value precautions greenrevolution.org.in. AGGREGATE IMPACT VALUE TEST .The aggregate impact value gives a relative measure of the resistance of an aggregate to sudden shock . Fig. 2: Sieves Seives required are 12.5, 10.0 and 2.36 mm Fig. 3: Impact Testing machine Weight of hammer is 13.5 to 14.0 kg and Height of Fall is 380±5 mm 3.Reference IS 2386(Part 4):1963 Methods of Test for Aggregates for Concrete . 7. Aggregates to be used for wearing course, the impact value shouldn’t exceed _____ percent. a) 30 b) 35 c) 40 d) 25 Answer: a Clarification: Aggregates to be used for wearing course, the impact value shouldn’t exceed 30 %. For bituminous macadam the maximum permissible value is 35 %. 8. Here are the recommended Aggregate Impact Test values and their corresponding classifications: Aggregate Impact Value Classification. Less than 20%: Exceptionally strong. Between 10% and 20%: Strong. . Frequently asked questions (FAQ) If the aggregate impact value is >35%, then it is classified as not suitable for use in road .

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. .The AIV apparatus is designed to determine the Aggregate Impact Value of aggregates, which provides a relative measure of the resistance of an aggregate to sudden shock or impact. . Testing aggregates - Method for determination of aggregate impact value (AIV) Other Products. RC 371.03. Vic Roads - Aggregate Impact Value - RC 371.03. Other .29. Why we perform the Impact test for aggregates? 30. Write down the formula for finding the impact value for given sample of aggregates. 31. State the significance of slump test. 32. Name the test to determine the moisture content of aggregates. 33. Explain the procedure for conducting the aggregate’s impact value test. 34. Define .

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. . Fig. 1: Balance. Balance should be accurate upto 1 g. Fig. 2: Sieves. Seives required are 12.5, 10.0 and 2.36 mm . Fig. 3: Impact Testing machine . The apparatus for Aggregate Crushing Value Test comprises the following: Fig 1: Aggregate Crushing Value Apparatus. A steel cylinder with a 15 cm diameter, equipped with a plunger and base plate. A straight metal tamping rod with a diameter of 16 mm and a length of 45 to 60 cm, rounded at one end.

38. How is aggregate impact value expressed? 39. Aggregate impact value material A is 20 and that of B is 45. Which one is better for surface course? Why? 40. Explain ductility of Bitumen and its significance? Concrete Technology LAB .This set of Highway Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Stone aggregates – 1”. . The plate bearing test is used to evaluate _____ a) Modulus of sub grade reaction . but normally the aggregate upto 30% impact value can be used. 11. The skid number for highways should not be less than _____ a) 55 b) 45 c .Impact Value should not be less than 45% for aggregates used for concrete other than wearing surface and 30% for concrete used in wearing surface. Table below shows the classification of aggregate with respect to aggregate impact value and limits of aggregate impact value for different types of road construction suggested by Indian Road .The plunger should rest entirely on the aggregate without touching the test cylinder so that the entire load applied by the compression testing machine is passed into the aggregate only. The tampering should be done gently and evenly over the surface of the sample.

Aggregate crushing value = (W2 x 100) / (W1-W) W2 =Weight of fraction passing through the appropriate sieve W1-W =Weight of surface dry sample. The mean of two result to nearest whole number is the aggregate crushing value. Result The aggregate crushing value of the given sample= Aggregate Crushing Values for Roads and Pavement ConstructionLike Share & Subscribe CivilPracticalSiteTraining #CivilGuruji #CivilEngineersTrainingInstituteLike Share & SubscribeBook Your Seat, Limited Seat LeftRegistr.Aggregate Crushing Value Test.

coarse aggregate impact test

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