AS NZS 1141.7:2014 pdf free
AS NZS 1141.7:2014 pdf free.Methods for sampling and testing aggregates
The test procedure shall be carried out on duplicate test portions as follows:
(a) Using the procedure prescribed in Appendix A, Steps (a) to (g), weigh the density bottle and stopper when filled with the dilatometric liquid and record the mass (m3).
(b) Dry the test portion of filler for 4h in the oven at a temperature of 105°C to 110°C and cool in the desiccator to room temperature.
(c) Clean and dry the bottle and add the filler through the funnel until the bottle is approximately one-third full. Weigh the bottle plus contents and stopper and record the mass (m4)
(d) Add sufficient dilatometric liquid to cover the filler and half fill the bottle. Release entrapped air by giving the bottle and its contents a few light taps or gentle swirls on the bench and then subjecting the bottle and contents to reduced pressure (approximately -90 kPa gauge pressure) in a vacuum vessel for at least 5 min until no further bubbles appear.
(e) Add further dilatometric liquid to fill the bottle completely then immerse the bottle in the water bath at 25 +0.1°C. The level of water in the bath shall come to within approximately 5 mm of the top of the density bottle.
(f) After 30 min, insert the stopper carefully so that no bubbles are trapped in the neck of the bottle and the excess liquid is expelled through the capillary in the stopper.
(g) After a further 10 min, brush the top of the stopper with a slip of filter paper, holding the paper at an angle to ensure a flat surface is passed over the capillary opening. Do not hold the bottle by hand during this process.
(h) Remove the bottle from the bath, dry carefully, preventing any static charge and weigh immediately， recording the mass of stopper, density bottle, filler and dilatometric liquid (ms)
NOTE: On removing from the water bath the bottle should be handled gently by the neck to prevent distortion of the bottle sides using suitable tongs or gloves to prevent transfer of heat,static or contamination of the bottle.AS NZS 1141.7 pdf free download.
