Los - Angeles Abrasion Test .docx

Introduction Abrasion is known as process of scraping or wearing something away, technically speaking; abrasion in geology is the mechanical scraping of a rock surface by friction between rocks and moving particles during their transport by wind, waves, gravity, running water or erosion. The intensity of this erosion effect depends on the hardness, concentration, velocity and mass of the moving particles.

Objective To choose the best type of aggregate due to abrasion value.

Standard Reference ASTM-C-131

Material Aggregate Sample (5000g)

Apparatus and Equipment - Los-Angeles Abrasion Resistance Test

Procedure - Place Aggregate sample into los-angles machine - Place No. of Specified sphere - Allow cylinder to rotate 500 rounds - After test is finished : Remove metal sphere - Drop Aggregate sample into metal tray - Sieve Aggregate sample after test, on sieve no.12 (1.7mm) weight of aggregate passing sieve no.12: Loss

Data and Calculation

%𝑳𝒐𝒔𝒔 =

𝒘𝒆𝒊𝒈𝒉𝒕 𝒐𝒇 𝒂𝒈𝒈 𝒑𝒂𝒔𝒔𝒊𝒏𝒈 𝒔𝒊𝒆𝒗𝒆 𝒏𝒐. 𝟏𝟐 𝟓𝟎𝟎𝟎 − 𝟐𝟗𝟒𝟎 = ∗ 𝟏𝟎𝟎 = 𝟒𝟏. 𝟐% 𝒐𝒓𝒊𝒈𝒏𝒂𝒍 𝒔𝒂𝒎𝒑𝒍𝒆 𝒘𝒆𝒊𝒈𝒉𝒕 𝟓𝟎𝟎𝟎