IMPACT VALUE OF AGGREGATE 1.Objective The aggregate impact value gives a relative measure of the resistance of an aggregate to sudden shock ... 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- …
اقرأ المزيد
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 …
اقرأ المزيد
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 a period of four hours at a temperature of 100-110 °C and cooled.The measuring cup shall be filled about ...
اقرأ المزيد
Here I have explained about Aggregate Impact Test. Read definition, apparatus, IS code, procedure, observations, formula, result and lab report about aggregate impact value test . Apparatus Required for …
اقرأ المزيد
Aggregate impact values are used to classify the stone aggregates with respect to toughness property as given below. Aggregate impact value (%) Toughness Properties. <10. Exceptionally tough / Strong. 10 – 20. Very tough / Strong. 20 – 30. Good for pavement surface course.
اقرأ المزيد
The aggregate impact value is the proportion of the sample that passes a 2.36 mm sieve after the hammer impacts. European Standards will not contain the 10 per cent fines test or the aggregate impact value test (although a different impact test, the German Schlagversuch test, has been included).
اقرأ المزيد
The limits for impact value vary depending on the type of aggregate and its intended use. Here are some commonly used limits as per ASTM C131 and BS 812: Part 112: For base course and wearing course aggregates. Maximum impact value: 30%. Minimum impact value for heavy-duty concrete pavements: 20%.
اقرأ المزيد
Article Name. Aggregate Impact Test Procedure for Determining AIV as Per IS 2386 Part-4. Description. The Aggregate impact test is used to determine the aggregate impact value (AIV), which provides a relative measure of the resistance of a coarse aggregate to sudden shock or impact. Lower Aggregate Impact values indicate aggregates that are ...
اقرأ المزيد
Observations and Calculations Calculate the aggregate impact value (AIV) expressed as a percentage to the first decimal place for each test specimen from the following equation: Where (𝐴𝐼𝑉) = 𝑀2 × 100 𝑀1 M 1 is the mass of the test specimen (in g); M 2 is the mass of the material passing the 2.36 mm test sieve (in g).
اقرأ المزيد
APPARATUS The apparatus of the aggregate impact value test as per IS: 2386 (Part IV) – 1963 consists of: 7) A testing machine weighing 45 to 60 kg and having a metal base with a plane lower surface of not less than 30 cm in diameter. ... PRECAUTIONS 1 Distilled water should be used as the heating medium. 2 During the conduct of test the ...
اقرأ المزيد
The abrasion Test measures aggregate toughness and abrasion resistance such as crushing, degradation and disintegration. This test is suggested by AASHTO T 96 or ASTM C 131: Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in Los Angeles Machine. The aggregates are used for the surface course of the …
اقرأ المزيد
Aggregate Impact test; Aggregate Abrasion test; Shape test (Flakiness index test and Elongation index test) Soundness test; Specific gravity and water absorption test; Sieve Analysis. Sieve analysis is a method of determining the particle size distribution of coarse aggregates (size more than 4.75 mm) in a sample of aggregate. It is one of the ...
اقرأ المزيد
The Aggregate Impact Test, also known as the Aggregate Impact Value (AIV) Test, is an important procedure used to determine the resistance of aggregates to impact. This test …
اقرأ المزيد
The Los Angeles (L.A.) Abrasion Test is widely used as an indicator of the relative quality of aggregates. It measures the degradation of standard gradings of aggregates when subjected to abrasion and impact in a rotating steel drum with an abrasive charge of steel balls. The drum is fitted with an internal shelf that lifts and drops the charge ...
اقرأ المزيد
By N Lavanya. Aggregate impact value is the measure of the resistance of an aggregate to sudden shock or impact. This test is conducted to determine the toughness of aggregates. This test helps to evaluate the quality of aggregates which can be used in road construction. The specifications for this test are given in IS : 2386 Part IV …
اقرأ المزيد
The Aggregate Impact Test, also known as the Aggregate Impact Value (AIV) Test, is an important procedure used to determine the resistance of aggregates to impact. This test is essential in the construction industry as the impact of aggregates on structures and roads can have a significant effect on their durability and safety.
اقرأ المزيد
The aggregate impact Value test is used to assess how resistant aggregates are to impact to fracture under repeated impacts. Based on impact value, determine their suitability for road construction. …
اقرأ المزيد
Sampling for Crushing Test of Aggregate. For the Aggregate crushing value test, an aggregate sample passing through a 12.5 mm IS sieve and retained on a 10mm IS sieve is selected and dried to a temperature of 105 ºC to 110 ºC then cooled to room temperature. To fill the cylindrical measure mold about 6.5 kg of a sample of aggregate is sufficient.
اقرأ المزيد
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.
اقرأ المزيد
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. 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 ...
اقرأ المزيد
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 sample dust (Y). Calculate the weight of passed dust, B = (X-Y)
اقرأ المزيد
Test method. The procedure for conducting an Aggregate Impact Test (AIV) is as follows: Prepare the test sample by selecting aggregates sized between 10.0 mm and 12.5 mm. Dry the aggregates by heating at 100-110° C for 4 hours or until constant mass is achieved, and then cool them. Sieve the aggregates through 12.5 mm or 14mm and 10.0 …
اقرأ المزيد
2.2.7 Precautions 2.3 Impact Test on Steel 2.4 Charpy Test 2.4.1 Theory 2.4.2 Apparatus 2.4.3 Testing Machine 2.4.4 Test Specimen 2.4.5 Procedure 2.4.6 Observations and Calculations 2.4.7 Result ... Impact test may be carried out by the Aggregate Impact Test which has been standardized
اقرأ المزيد
The aggregate impact test is carried out to evaluate the resistance to impact of aggregates. Aggregates passing 12.5 mm sieve and retained on 10 mm sieve is filled in a cylindrical steel cup of internal dia …
اقرأ المزيد
The limits for impact value vary depending on the type of aggregate and its intended use. Here are some commonly used limits as per ASTM C131 and BS 812: Part 112: For base …
اقرأ المزيد
The test sample: normally aggregates sized 10.0 mm to 12.5mm. the aggregates should be dried by heating at 100-110 0C for a period of 4hours and cooled. 1. Sieve the material through 12.5mm and 10.0 mm IS sieves. The … See more
اقرأ المزيد
The apparatus of the aggregate impact value test as per IS: 2386 (Part IV) – 1963 consists of: 7) A testing machine weighing 45 to 60 kg and having a metal base with a plane lower surface of not less than 30 cm in diameter. It is supported on level and plane concrete ... Aggregate Impact Value. 5. PRECAUTIONS 1) Place the plunger centrally so ...
اقرأ المزيد
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.
اقرأ المزيد
3.2.4 heavy medium heavy impact value (IV/HMH), n—the IV derived from using a 10 kg (22 lbm) mass hammer 130 mm (5 in.) in diameter free falling 300 mm (12 in). 3.2.5 impact soil tester, n—testing apparatus used to obtain an IV of a soil. 3.2.6 impact value (IV), n—the value expressed in units of
اقرأ المزيد
TITLE OF EXPERIMENT : AGGREGATE IMPACT TEST DATE OF EXPERIMENT : 17 OCTOBER 2021 GROUP : 3 GROUP MEMBERS 1. NUR ASMAHAMIZAH BINTI ZAILANI (2019264142) 2. SITI FATIMAH BINTI ISHAK(2019239258) ... But, in the used of the aggregate impact machine, there are some precautions that need to be taken into …
اقرأ المزيد