UNIT 2 HARDNESS AND IMPACT TESTS
The method of test covers the procedure for determining the aggregate impact value for coarse aggregates. Objective To &terrnine the impact value of aggregates. 2.2.1 Applications of Aggregate Impact Value The aggregate impact value is considered to be an important test to assess the suitability or
اقرأ أكثر
Ten Percent Fines Value (TFV) Test
Required fields are marked. The ten percent fines value (TFV) test determines the amount of material finer than 75 micron size in coarse aggregates. This helps assess the amount of dust or clay-like fines present which can be detrimental to concrete properties. A lower TFV is desirable as excessive fines can reduce workability and strength of ...
اقرأ أكثر
Aggregate Impact
Weak aggregates may break down during mixing, handling and compaction. Within British Standards, the mechanical properties of aggregate can be assessed from 10 per cent fines value or aggregate impact value. In the 10 per cent fines test, a load is applied to the 14–10 mm fraction of the aggregate.
اقرأ أكثر
Concrete & Highway Engineering Lab Manual
AGGREGATE IMPACT TEST AIM : To determine aggregate Impact value. THEORY Toughness is the property of a material to resist impact. Due to traffic loads, the road stones are . Vardhaman College Of Engineering Concrete technology 1 2 1. Vardhaman College Of Engineering . Vardhaman College Of Engineering . Vardhaman College Of Engineering .
اقرأ أكثر
Determination of Aggregate Impact Value
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 of …
اقرأ أكثر
(PDF) Prediction of Aggregate Impact Values and
[19,20,21,22,23] Kwek and Awang (2018) [19] Water The aggregate impact value test determines the aggregate's resistance to sudden loading [24], which may differ from the resistance to ...
اقرأ أكثر
(DOC) Aggregate crushing value Test Lab Report
Aggregate crushing value Test Lab Report. Adnan Abir. Objective: 1. Determine the aggregate crushing value of coarse aggregate. 2. Assess suitability of coarse aggregates for use in different types of road. Theory: The " aggregate crushing value " give a relative measure of the resistance of an aggregate to crushing under gradually applied ...
اقرأ أكثر
Aggregate Impact Value Test
The ratio of the weight of fines formed by the total weight of the sample in each test shall be calculated and expressed in %age. The results shall be recorded to the first decimal place. Aggregate impact value = W 1 / W 0 x 100. Where, W 1 = Weight of the aggregate passing through the 2.36 mm IS sieve.
اقرأ أكثر
Lab 2 Aggregate Impact Value
AGGREGATE IMPACT VALUE 1 INTRODUCTION. Aggregate impact value (AIV) is the percentage of fines produced from the aggregate sample after subjecting it to a standard amount of impact. It is the percentage …
اقرأ أكثر
Aggregate Crushing Value Test – Procedure, Result & Calcualtion
The aggregate crushing value formula is given below, Aggregate crushing value = (W3 / W) or W3 / (W2 – W1) W1 = Empty weight of cylindrical Measure. W2 = Weight of Aggregate with Cylindrical Measure. W = W2 –W1 = Weight of Aggregate Sample. W3 = Weight of crushed aggregate sample passed through 2.36 mm IS Sieve.
اقرأ أكثر
Aggregate impact value test- step by Step Procedure …
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 …
اقرأ أكثر
(PDF) Prediction of Aggregate Impact Values and
The root mean square error (RMSE) values estimated based on the actual and predicted values were also found to be low which further concrete the claim that light compaction test can be a...
اقرأ أكثر
Exp 4 Aggregate Impact Value
Related Theory: Aggregate Impact Value: ... Aggregate Impact Value; Test Specifications: 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 …
اقرأ أكثر
Aggregate Impact value Test Apparatus, Procedure …
Theory and Concept of aggregate Impact value In physical meaning, toughness is the property of a material to resist impact . Due to the movement of vehicles on the road, the aggregates are subjected …
اقرأ أكثر
DETERMINATION OF AGGREGATE IMPACT VALUE (AIV) (BS …
Scope: This Part of BS 812 describes methods for the determination of the aggregate impact value (AIV) which gives a relative measure of the resistance of an aggregate to …
اقرأ أكثر
DCC3113 DETERMINATION OF AGGREGATE IMPACT VALUE.
3. 3 OBJECTIVES To assess their suitability inroad construction on the basis of impact value. This test is done to determine the aggregate impact value of coarse aggregates. Many tests have been developed toempirically characterize aggregate properties without, necessarily, strong relationships to the performance of final products …
اقرأ أكثر
AGGREGATE IMPACT VALUE TEST-10+ IMPORTANT NOTES TO REMEMBER
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 أكثر
(DOC) Impact Value Test | sakshi joshi
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. Aggregate specimen passing 12.5mm sieve and retained on 10mm sieve is filled in the cylindrical measure in 3 layers by tamping each ...
اقرأ أكثر
Impact Value of Aggregate
The aggregate comprising the test sample shall be dried in an oven for a period of four hours at a temperature of 100 to 110°C and cooled. The measure shall be filled about one-third full with the aggregate and tamped with 25 strokes of the rounded end of the tamping rod. ... Aggregate Impact Value = (B/A) X 100 where A = weight in g of ...
اقرأ أكثر
D5874 Standard Test Method for Determination of the Impact …
Scope. 1.1 This test method covers the determination of the Impact Value (IV) of a soil either in the field or a test mold. 1.2 The standard test method, using a 4.5 …
اقرأ أكثر
Lab Report 1 DETERMINATION OF AGGREGATE IMPACT VALUE …
Calculate the aggregate impact value (AIV) expressed as a percentage to the first decimal place for each test specimen from the following equation: 𝑀2 (𝐴𝐼𝑉) = × 100 𝑀1 Where M 1 is the mass of the test specimen (in g); M 2 is the mass of …
اقرأ أكثر
Aggregate Impact Value (AIV) — Material Testing Expert
Calculate the Aggregate Impact Value by dividing the weight of the fraction passing through the sieve by the total weight of the sample, and multiplying by 100. …
اقرأ أكثر
IMPACT STRENGTH OF BRITTLE MATERIALS (ROCKS)
Test AIV (Aggregate Impact Value, SS 1974) The AIV (Aggregate Impact Value) is a standard test procedureby which the impact strength of aggregates is tested. Just like in Protodyakonov's test, thematerialused consists of irregularly shaped particles of the -14 + 10 mm size fraction. The weight of the specimen is A.
اقرأ أكثر
Abrasion Test | Test to Determine the Abrasion Value | Abrasion Test
Aggregates are used for the surface course of road pavements and are subject to wear and tear due to traffic movement. (ASTM c131 Los Angeles abrasion test) Therefore, aggregates used in road construction must be hard enough to resist Abrasion. The resistance offered by the aggregate to Abrasion is determined in the laboratory by …
اقرأ أكثر
Aiv Test Report | PDF | Road Surface | Experiment
Aggregates Impact Test (AIV) Introduction: Impact value of an aggregate is the percentage loss of weight particles passing 2.36mm sieve by the application of load by means of 15 blows of standard hammer and drop, under specified test condition. The aggregate impact value gives a relative measure of the resistance of an aggregate to …
اقرأ أكثر
IS 5640 (1970): Method of test for determining aggregate …
1.1 This standard covers the procedure for determining the aggregates impact value of soft coarse aggregate used for bases and sub-bases of road pavements. 2. APPARATUS. 2.0 The apparatus shall consist of the following: · of test for aggregates for concrete: Part IV tRule. for rounding off numerical value. ( rlv;Sld).
اقرأ أكثر
Aggregate Impact Value Test | Impact Test of Aggregate
- The impact machine is rest on a horizontal flat surface like the level plate, block, or floor without any packing. So, the application of a hammer is straight and vertical.
- The cup is fixed in a proper position on the base of the impact machine.
- Transfer aggregate sample from cylindrical measure to cut fitted in an impact test machine and apply 25 strokes of the rod to compact it.
- The impact machine is rest on a horizontal flat surface like the level plate, block, or floor without any packing. So, the application of a hammer is straight and vertical.
- The cup is fixed in a proper position on the base of the impact machine.
- Transfer aggregate sample from cylindrical measure to cut fitted in an impact test machine and apply 25 strokes of the rod to compact it.
- Then the hammer is lifted 380mm and falls on the upper surface of the aggregate which fills in the cup.
DETERMINATION OF AGGREGATE IMPACT VALUE (AIV) (BS …
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: 𝑀2 (𝐴𝐼𝑉) = × 100 𝑀1 Where 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 أكثر
Los Angeles Abrasion Test on Aggregates -Values for …
🕑 Reading time: 1 minuteLos Angeles abrasion test on aggregates is the measure of aggregate toughness and abrasion resistance such as crushing, degradation and disintegration. This test is carried out by …
اقرأ أكثر
Determination of Fineness Modulus of a Sample of Fine Aggregate
1) IS test sieve 10 mm, 4.75 mm, 2.63 mm, 1.18 mm, 600 Micron, 300 Micron, 150 Micron. 2) Sieve shaker. 3) Weighing Machine. READ MORE. Determination of Normal Consistency of Cement; Specific Gravity Test for Bitumen; Bitumen Penetration Test – Consistency Test; Softening Point of Bituminous Materials; Aggregate Abrasion Value Test
اقرأ أكثر