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May 08, 2013 · Aggregate crushing Value =(W B /W A) × 100 Record. The mean of the two results is reported to the nearest whole number as the aggregate crushing value of the tested material. Safety Precautions: Use hand gloves while removing containers from oven after switching off the oven. To wear safety shoes helmet during the time of test.
The Los Angeles () abrasion test (Figure 1) is a common test method used to indie aggregate toughness and abrasion characteristics. Aggregate abrasion characteristics are important because the constituent aggregate in HMA must resist crushing, degradation and disintegration in order to produce a high quality HMA.
Calculate Aggregate Crushing Value. The ratio of the weight of fines formed to the total sample weight in each test shall be expressed as a percentage, the result being recorded to the first decimal place: Aggregate Crushing Value = W B W A × 100. Where, W A is weight of surfacedry sample
Oct 03, 2019 · The crushed aggregate sample which is finer than mm is separated and expressed as a percentage of the original weight taken in the mould. The percentage of weight passed through the IS sieve is known as Aggregate crushing value.. In situations, when the aggregate value 30 or higher the result may be a mistake and in such cases, the "ten percent fines value" should be .
The crushing value of aggregates is rather insensitive to variation in strength of weaker aggregates. For this reason, a simple test known as 10 percent fine value is introduced. When the aggregates crushing value become 30% or higher, the results are likely to be inaccurate. Aggregate Crushing Load (Source: IS 2386(Part 4):1963) The aggregates ...
May 15, 2021 · The necessary precautions were taken to obtain a sample incorporating representative particle sizes and all conditions, as suggested by ASTM D7503 (2014).The experimental testing for basic characterization purposes of RCA included particle size distribution test, organic content test, particle density test, specific gravity test, pH test, Los Angeles (LA) abrasion test, aggregate crushing ...
Feb 13, 2020 · Determination of aggregate impact value (AIV) of given aggregate sample (BS812) Significance: Aggregates used in the construction of roads should be strong enough to resist crushing under traffic wheel loads. It gives relative measure of the resistance of an aggregate .
Jul 01, 2019 · The ' Aggregate Impact Value' is the mean of two observations, rounded to a nearest whole number. Precautions Place the plunger centrally so that it falls directly on the aggregate sample and does not touch the wall of the cylinder in order to ensure that the entire load is transmitted on the aggregates.
May 07, 2013 · Aggregate impact Value = (W B / W A) × 100. Precautions. Use hand gloves while removing containers from oven after switching off the oven. To wear safety shoes goggles at the time of testing. Before testing, machine should be properly checked. Special care should be taken that no outer air enters when using the balance.
Mar 30, 2020 · Procedure of Aggregate Crushing Value Test:. Sieve the test material through mm and mm IS sieve. Take test samples of aggregates passing through mm IS sieve and retained on 10 mm IS sieve (minimum 3 Kg). Dry theme in an oven for 4 hours at a temperature of 100 °C to 110 °C and then cool at room temperature.
Precautions For Aggregate Crushing Value Test. Precaution Of Aggregate Crushing Value The aggregate crushing value test gives the relative measured value of aggregate compressive strength under gradually applied compressive load. Aggregate crushing value is the percentage by weight of crushed or finer material obtained when the test aggregate ...
May 01, 2013 · Materials Testing Equipment Ltd – Aggregate Testing Equipment. In general it is normal to test Aggregates for properties which include particle size, .. Knowing how these factors affect performance can enable precautions to be taken and . aggregate testing equipment – Aggregate Impact Value (AIV) . »More detailed
Procedure. Step 1 – First, the aggregate sample sieve through sieve and collect it which is retained in 10 mm 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 the tamping rod.
Aggregate crushing value test on coarse aggregates gives a relative measure of the resistance of an aggregate crushing under gradually applied compressive load. Coarse aggregate crushing value is the percentage by weight of the crushed material obtained when test aggregates are subjected to a specified load under standardized conditions.