How many steel balls are put in to the LA abrasion test drum?

The Los Angeles (LA) Abrasion test measures the degradation of aggregates when subjected to abrasion, crushing and grinding in a rotating steel drum containing 12 steel balls (or less, depending on the Grading) without the presence of water.

Which sieve is used in Los Angeles abrasion test?

The standard L.A. abrasion test subjects a coarse aggregate sample (retained on the No. 12 (1.70 mm) sieve) to abrasion, impact, and grinding in a rotating steel drum containing a specified number of steel spheres.

What are the apparatus used in abrasion value test?

This test helps to determine the abrasion value of coarse aggregates as per IS: 2386 (Part IV) – 1963. The apparatus used in this test are Los Angles abrasion testing machine, IS Sieve of size – 1.7mm, Abrasive charge – 12 nos. cast iron or steel spheres approximately 48mm dia.

Which property of material is evaluated using Los Angeles abrasion test?

abrasion resistance
The value obtained from the Los Angeles abrasion test gives an indication of the abrasion resistance of the material. A low LAV indicates that the material has high abrasion resistance. Conversely, a high LAV indicates that the material has low abrasion resistance.

What is the purpose of Los Angeles abrasion test?

Abrasion test is carried out to test the hardness property of aggregates. The principle of Los Angeles abrasion test is to find the percentage wear due to relative rubbing action between the aggregate and steel balls used as abrasive charge.

Why is LA abrasion test superior?

The Los Angeles (L.A.) abrasion test is a common test method used to indicate 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.

What is the principle of Los Angeles abrasion test?

The principle of Los Angeles abrasion test is to produce abrasive action by use of standard steel balls which when mixed with aggregates and rotated in a drum for specific number of revolutions also causes impact on aggregates.

What is Los Angeles abrasion value?

What is abrasion value test? Abrasion Test is the measure of aggregate toughness and abrasion resistance such as crushing, degradation and disintegration. The percentage wear of the sample aggregates due to rubbing with steel balls is determined and is known as Los Angeles Abrasion Value.

What is principle of Los Angeles abrasion test?

Why we conduct abrasion test on aggregates used for roads?

Abrasion test is carried out to test the hardness property of aggregates and to decide whether they are suitable for different pavement construction works. Los Angeles abrasion test is a preferred one for carrying out the hardness property and has been standardized in India (IS:2386 part-IV).

What is the purpose of conducting abrasion resistance test for stones used in construction?

Abrasion resistance is a property of a marble which gives an indication of the marble wearing quality when it is exposed to foot traffic. This property is tested according to ASTM C241 standards.