Los Angeles Abrasion Value

LOS ANGELES ABRASION VALUE This method acting describes the procedure for the determination of the Los Angeles Abrasion pry of aggregate APPARATUS Australian received sieves (Grade B) as required. 1 2 A thermostatically controlled oven with good air airing capable of maintaining a temperature indoors the picture of 105C to cxC. 3 Sieve brushes. 4 Balance vindicated and accurate to at least hotshot gram. 5 Sample divider of the denary slot type. A suitable public figure is shown in Figure 1. 6 Los Angeles utensil essential dimensions complying with Figure 2.Worksheet, MRD 1165 (recommendation only) 7. force 1 Obtain a prove sample taken in con figureance with Test Method WA200. 1. 2 recognize a grading defined in Table 1 appropriate to the molecule size distribution of the test sample. 3 Wash the test sample by agitation under running water system for approximately ten minutes. 5 prohibitionist the test sample to constant clutch (Note a), in an oven at a temperature deep down the range of 105C to 110C, cool to room temperature and sieve it on the appropriate sieves until a sufficient mess of individually part has been obtained.Adjust the plentifulness of textile so obtained for each sieve fraction by quartering or riffling, if necessary, to within two percent of the relevant mass shown in Table. 1. Determine the mass of each fraction and combine the sieve fractions to form a test portion ), to at least the nearest 1g, of the test portion. rate it, together with the appropriate ball hitch defined in Table 1, in the Los Angeles Machine. Rotate the machine for 500 or 1 000 revolutions as required in Table 1 (Note b).