BS EN +A Licensed to Mr George Calvar on 26 May 1 user personal license only. Copying, copy/pasting, storage & distribution or use. BS EN BS EN , incorporating amendment no. 1. BS EN +A, incorporating Corrigendum May BS EN . Specifies reference procedures, and in certain cases an alternative method, for the chemical analysis of aggregates. Document History. Supersedes BS EN.
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Repeat the procedure above boil, precipitate, filter and wash and reject the precipitate if any. Make a correction for loss of intensity of the X-ray tube. Add 10 to 12 drops of the indicator solution 4.
Add to each bottle a mass of water equal to the mass of the test specimen. Transfer the test specimens obtained as specified in Transfer the test specimens 1744-1 the flasks, weigh the two flasks and contents and record their mass to the nearest 0,01 g. For details of these and other benefits contact Membership Administration. If the difference between two determinations is more than twice the repeatability standard deviation, repeat the test and take the mean of the two closest values.
Licensed to Mr George Calvar on 26 May An aggregate test specimen is extracted with water to remove chloride ions.
BS EN 1744-1:2009+A1:2012
Titrate with sodium thiosulfate solution 4. Weigh the crucible and its contents. In such cases volumes delivered from measuring cylinders and indicated masses using the ordinary balances specified in 5. If it is not clear, start the test again using a new test portion.
The values are not directly indicative of those expected in the field, i. Learn more about the cookies we use and how to change your settings. Weigh the test specimen to the nearest 0,1 g in a 2 l beaker marked as “A” 5.
Contact with water shall be avoided. Please help us to share our service with your friends.
Record the mass from the ordinary balance specified in 5. For this reason a d-range around the above mentioned intensities shall be scanned.
Compare the colour of the solution to the standard colour solution 4. Add sufficient silver nitrate to ensure a titre of at least rn ml of thiocyanate solution.
BS EN +A – Tests for chemical properties of aggregates. Chemical analysis
Transfer the test portion into the bottles. Determination of strength EN The testing time in the steam test depends of the composition of slag. It shall have a mass of at least 3 g. In the case of lightweight aggregates, the two test specimens shall have a volume of about 1 l.
Add a small amount of filter paper pulp and warm up the content of the beaker to below the boiling point. Therefore, care shall be taken to prevent a drop in temperature which would interrupt the production of steam. The em sulfate content is determined by precipitation at pH between 1 and 1,5 by a solution of barium chloride, at the boiling point. Add 4 ml 174-41 6 ml of the potassium chromate solution 4. Fix to the flask the e neck supporting the separating e and connect this neck to the inlet of the condenser; connect the outlet of the condenser to the glass tube which dips into the beaker containing 15 ml of ammoniacal zinc sulfate solution 4.
The parts should be weighed, heated and reweighed separately; and recombined when cool. The principle of the method is to prepare two nominally identical mortars and test them for stiffening rate and compressive strength. Determination of particle size distribution — Test sieves, nominal size of apertures ENMethods of test for mortar for masonry — Part 4: Then this sub-sample shall be prepared in accordance with the requirements of the X-ray device.
As lime is deposited on the glass beads during the steam test, it is furthermore necessary to clean off the lime after every fourth steam test with dilute hydrochloric acid. In the event of a reliable method sn developed, the types should be redefined in terms 174-1 free MgO content.