Abstract： AS 1141.27:2015 pdf download.Methods for sampling and testing aggregates Method 27: Resistance to wear by attrition. (e) Thoroughly wash the aggregate comprising each test portion, to remove all dust from its surfaces. (f) Allow the moistur...

AS 1141.27:2015 pdf download.Methods for sampling and testing aggregates Method 27: Resistance to wear by attrition.

(e) Thoroughly wash the aggregate comprising each test portion, to remove all dust from its surfaces.

(f) Allow the moisture to evaporate from the surface or blot it off with a soft cloth, and subsequently oven dry the test portion

to constant mass in an oven operating between 105°C and 110°C.

6.1 General

The aggregate shall be tested to at least one of Clause 6.2 (the dry attrition test) or Clause 6.3 (the wet attrition test). Each

procedure requires two test portions to be used.

6.2 Dry attrition test

The procedure is as follows:

(a) Select two test portions, determine the mass of each test Portion to the nearest 1 g and record (m1).

(b) Place each test portion in one of the cylinders of the Deval attrition machine, bolt on the covers and set the machine to run

for 10 000 rotations.

(c) Keeping each test portion separate. remove all material from each cylinder and screen each test portion on a 2.36 mm sieve.

(d) Thoroughly wash the material retained on the sieve to remove all dust from the surface of the stone for each test portion.

(e) Dry the material retained on the 2.36 mm sieve from each test portion to constant mass in an oven operating between 105°C and 110°C. Determine and record the retained mass (m2) for each test portion.

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