· 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. 3. APPARATUS The apparatus of the aggregate impact value test as per IS: 2386 (Part IV) – 1963
The aggregate impact value provides a relative measure of resistance to crushing under a gradually applied compressive load. To achieve a high quality of pavement, lower aggregate impact value should be preferred. Toughness is the property of a material to resist impact. Due to traffic loads, the aggregate are subjected to the pounding action ...
Procedure of 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. (i) Sieve the material through 12.5 mm and 10.0mm IS sieves. The aggregates passing through 12.5mm sieve and retained on 10.0mm sieve comprises the test material.
· The procedure of Aggregate Crushing Value Test. 1. Put the filled cylinder on the horizontal and level base plate and weigh it (W 1) 2. Inserted the plunger horizontally on the surface. Care should be taken that the plunger should not jam in the cylinder. 3. Place the cylinder with a plunger on the compression testing machine. 4.
· This Construction Standard has been prepared by the Working Group on Drafting of Construction Standard CS3 under the Standing Committee on Concrete Technology, Development Bureau, the Government of the Hong Kong Special Administrative Region.
It is recommended that the crushing value of aggregate should be less than 30%. If it is more than 30 % then 10% finer aggregate is suggested to use. The aggregate whose crushing value is less than 30% can be used for cement concrete road. The aggregate whose crushing value is less than 40% can be used for wearing surface.
· 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.
· 2.1 Object - This method of test covers the procedure for determining aggregate crushing value of coarse aggregate. NOTE 1 -The 'aggregate crushing value' gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. With aggre- gate of 'aggregate crushing value' 30 or higher, the ...
· a fully ductile test, a fully (or nearly) brittle test, and as many temperatures in between as possible. . 5, Note fracture energy and estimate the % brittleness from the appearances of fracture surfaces of the specimens. Lab Report Requirements 1. Results Display the test data in a Table. Plot impact energy versus temperature and % brittleness ...
Aggregate Impact Value. The standard amount of impact is produced by a known weight, i.e. a steel cylinder, falling a set height, a prescribed number of times, onto an amount of aggregate of standard size and weight retained in a mould. …
· Read definition, apparatus, IS code, procedure, observations, formula, result and lab report about aggregate impact value test. Apparatus Required for Aggregate Impact Value Test:- Impact testing machine
· 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 …
· The Manual of Aggregate Quality Test Procedures will be reviewed by the Aggregate Technology Coordinator for adequacy and updated as necessary to reflect the current policies and technology changes. Updates are made to the electronic file as needed and hard copies ... Aggregate by Abrasion and Impact in the Los Angeles Machine 33
· IS 2386(Part 4):1963 Methods of Test for Aggregates for Concrete- Mechanical Properties. Reaffirmed-Dec 2016 4.Procedure 1.The test sample shall consist of aggregate the whole of which passes a 12.5 mm IS Sieve and is retained on a 10 mm IS Sieve. The aggregate comprising the test sample shall be dried in an oven
M. kashif iqbal. DETERMINATION OF AGGREGATE IMPACT VALUE (AIV) (BS 812-112) 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 sudden shock or impact. Principle A test specimen is compacted, in a standardized manner, into an ...
· The procedure of the impact value test includes the following series of steps: 1. The aggregate samples of size 10mm to 12.5mm (passing through 12.5mm sieve and retained on 10mm sieve) are first taken and oven-dried at a temperature ranging from 100 degrees Celsius to 110 degrees Celsius for about four hours. 2.
The Aggregates (fine + coarse) generally occupy 60% to 75% of the concrete volume or 70% to 85% by mass and strongly influence the concrete's freshly mixed and hardened properties, mixture proportions, and economy. All Aggregates pass IS 4.75 mm sieve is classified as fine Aggregates. All aggregate technicians use the sieve analysis ...
PROCEDURE. Firstly, a v notch was cut at the middle of the specimen which is in the room temperature by using the notching machine. Then, the scale of the impact testing machine was set to the zero. Next, the pendulum was raised up to the higher potential position and it …
· Abstract: The Charpy impact test, just like any impact testing method, determines the toughness of. materials by measuring the amount of energy absorbed by a specimen as it fractures while. being ...
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) Now, the final report of aggregate impact value is …
· Macro-Hardness (Rockwell and Brinell) testing is the most commonly applied materials test in industry due to several factors: 1) Macro-Hardness Testing is simple to perform and does not require highly skilled operators; 2) Through the use of different loads and indenters, hardness testing can be used for determining the
· Izod Impact Test: In the Izod impact test, the test piece is a cantilever, clamped upright in an anvil, with a V-notch at the level of the top of the clamp. The test piece is hit by a striker carried on a pendulum which is allowed to fall freely from a fixed height, to give a blow of 120 ft lb energy.
· Technical Report Documentation Page 1. Report No. FHWA/NC/2013-18 2. Government Accession No. 3. Recipient's Catalog No. 4. Title and Subtitle December 2014 5. Report Date Aggregate Base Course Material Testing and Rutting Model Development 6. Performing Organization Code 7. Author(s) Liang Chern Chow, Debakanta Mishra, Ph.D., and …
The method of test covers the procedure for determining the aggregate impact value of coarse aggregates. OBJECTIVE. To determine the aggregate impact value of a coarse aggregate. APPARATUS. 1. Aggregate impact testing machine 2. IS sieve 14mm, 10mm, 2 3. a cylindrical measure 4. rod and balance 5. Bristle brush 6. Weighing Scale APPARATUS
· of aggregate) and 1.7 mm Fig. 3: Los Angeles Testing Machine Inside Length = 50 cm and Inside Diameter = 70 cm Fig. 4: Abrasive Charges Diameter = 48 mm and Weight = 390 to 445 g 3.Reference IS 2386(Part 4):1963 Methods of Test for Aggregates for Concrete- Mechanical Properties. Reaffirmed-Dec 2016 4.Procedure A.Gradation Of Aggregate
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 …
· Procedure. Step 1 – First, the aggregate sample sieve through 12.5mm sieve and collect it which is retained in 10mm sieve. Step 2 – Now, the sample should be dried through the oven up to 4 hours at 100 deg to 110 deg. Step 3 – Then, the aggregate sample should be filled in the metal cup by 3 layers. Each layer should be tamped 25 times by ...
· Procedure of Aggregate Impact value test. The test sample: normally aggregates sized 10.0 mm to 12.5 mm. the aggregates should be dried by …
· Aggregate report is the process that reviews the cumulative safety information from a wide range of sources, on a periodic basis and submits the findings to regulators ... ADR frequency and its impact on the safety of general product. Data collection . Serious and unexpected adverse events are reported . Data entry in database