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It's called tomorrow. You can't start next chapter of your life if you keep re-reading the last one. Success is the ability to go from one failure to another with no loss of enthusiasm. Only the people who dare to fail, will achieve big success. All glory comes from daring to begin. The poorest of all people is not the person without a cent, but the person without a dream. Happiness is when what you think, what you say, and what you do are in harmony.
Wear a smile and have friends; wear a scowl and have wrinkles. Strive not to be a success, but rather to be of value. Learn from yesterday, live for today, hope for tomorrow. This Section of BS therefore deals only with a revision of the sedimentation test of 7.
Although the general principles of the method have been retained, more detail has been included and the procedure has been brought into line with the procedure for sedimentation described in BS The classification is thus solely one of particle size and gives no indication of the composition of the particles or whether or not their presence is likely to be deleterious. It should not therefore be used for this purpose. It is intended that other British Standards should call up BS test methods as the basis of compliance.
Nevertheless it is not intended that all aggregates should be subjected regularly to all the listed tests. Requirements in other British Standard specifications will refer only to the relevant test methods. Some of the tests in other Parts of this standard are of limited application and advice on the use of simpler tests is given, for example, when they can be used for a preliminary sorting of aggregates to see whether more expensive testing is justified. Reference should be made to BS for general guidance on testing aggregates, precision of test methods and variance arising from sampling errors.
A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations.
Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 6, an inside back cover and a back cover. This standard has been updated see copyright date and may have had amendments incorporated.
This will be indicated in the amendment table on the inside front cover. Gas jars are suitable for use provided that apply. A minimum of six shape. If after a given time from the initial dispersal bottles is required. In the method described in this sedimentation tubes can be immersed up to Section of BS samples are taken from an the 1 mL mark. The bath shall not vibrate the aqueous suspension at various time intervals by sample. The sample used for the test the laboratory sample 5.
Other temperature measuring devices should be of equivalent accuracy. Made by prepared approximately once a month. The date of dissolving 33 g of sodium hexametaphosphate preparation shall be recorded on the bottle. Distilled or water of equivalent quality.
Fix the closure taking care to ensure watertightness. Pour the the aggregate. Make up the volume of suspension in the portions sedimentation tube to 1 mL with water. Weigh the dried test portion to the nearest 1 g mass M and place it in 20 1. Cover it with 10 0.
Transfer the liquid suspension to another 7. Allow the suspension to stand for 24 h constant mass. Wash the solids into the sedimentation tube, add 50 mL of 8 Procedure the sodium hexametaphosphate solution from the pipette and make the volume up to 1 mL. Close tap B and open tap E see Figure 1. Close to exactly 1 mL. Transfer this sedimentation tap E and remove the pipette from the water. Drain tube together with the sedimentation tubes off surplus water drawn up into the cavity above E containing the suspensions, prepared as described by opening the tap in such a way as to connect bulb in 8.
D and outlet tube F. Insert the rubber bungs and allow the tubes to stand 8. Calculate the internal volume temperature of the bath. Download Free PDF. A short summary of this paper. Download Download PDF. Translate PDF. Principle A test specimen is compacted, in a standardized manner, into an open steel cup.
The specimen is then subjected to a number of standard impacts from a dropping weight. Take grams of aggregate that is passing through 14mm sieve and retained on 10mm sieve.
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