AS 1141.33:2015 pdf free
AS 1141.33:2015 pdf free.Methods for sampling and testing aggregates
The procedure shall be as follows:
(a) Prepare a nominal 1% solution of common salt in water by adding 10 g of common or table salt to 1 L of water.
(b) Place about 50 mL of the salt solution in the 250 mL measuring cylinder. Pour aggregate into the cylinder until its measured volume in the cylinder is approximately 100 mL. If the volume of the aggregate and liquid is less than 150 mL，make the volume up to 150 mL by the addition of more salt solution and stopper the cylinder.
(c) Shake the mixture vigorously for approximately 30s until adherent particles have been dispersed. Place the measuring cylinder on a level surface, and gently tap it until the surface of the aggregate is level.
(d) Allow the measuring cylinder and contents to stand for 180 +10, -0 minutes. At the end of that time carefully examine the sand layer to determine if clay and silt particles are clearly visible, trapped between the sand particles. If the separation of the clay and silt from the sand has not occurred, report the result as ‘Indeterminate’.
NOTE: For quality control purposes at individual sites, it may be possible to obtain a result by reducing the quantity of sample in Item (b) above to 50 mL instead of 100 mL, but flling the cylinder with the liquid to 150 mL. This may result in better separation of the silt and clay. However, as the relationship between results so obtained and results from this Standard are unknown, any results obtained should be reported as ‘Non-standard’.
(e) If a clear separation of the silt and clay from the sand is obtained, record the volume of the sand (S) and the volume of the settled clay and fine silt (F), in millimetres (see Figure 1).
NOTE: When using a measuring cylinder, reading the heights in millilitres is sufficient as the cross-sectional area of the cylinder is the same at any height and therefore the ratio of the layer volumes is equivalent to the ratio of the layer heights.AS 1141.33 pdf free download.
