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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In order not to register the lifting movements associated with this, do not begin recording the displacement until steam is passing freely through the sample. The values are not directly indicative of those expected in the field, i.
The parts should be weighed, heated and reweighed separately; and recombined when cool. R1 is the reproducibility limit as defined in EN Titrate with sodium thiosulfate solution 4. Take approximately 8 g of this material as the test portion.
This allows them to be removed for examination and quantification. This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. Place ml water and 40 ml of concentrated hydrochloric acid 4. Reduce the laboratory sample by the procedures specified in EN to an amount not less than the mass specified in Table 1 7. The chloride is titrated with silver nitrate using potassium chromate as an indicator.
BS EN 1744-1:2009+A1:2012
We are a non-profit group that run this website to share documents. For lightweight aggregates, use a volume of 1 l. Add 5 ml of nitric acid 4.
Aggregates of higher sulfide content will require more than 10 min reaction time for complete transformation of all sulfides to precipitated zinc sulfide. Spread the test portion over a tray and dry it to constant mass 6. Take approximately 1 g of this material as the test portion.
Determination of particle size distribution — Test sieves, nominal size of apertures ENMethods of test for mortar for masonry — Part 4: NOTE The bottles should be approximately 5 l capacity when testing coarse aggregates or lightweight aggregates; approximately 2 l capacity when testing fine aggregates; and ml Erlenmeyer flasks for testing filler. A bottle of a different size can affect the comparison with the standard colour.
BS EN +A – Tests for chemical properties of aggregates. Chemical analysis
Mature, filter and ignite the barium sulfate precipitate as specified in If no brown gelatinous precipitate is formed when the particles are placed bss saturated limewater, they may be slowly reacting particles.
Wash the contents of the filter once with a little hot, demineralized water and reserve the filtrates. Wash out the flask three times sb a total of 50 ml propanol 4. Allow the crucible and its contents to cool to the room temperature in a desiccator. Fill up to the mark and homogenize by shaking.
The temperature of ignition used shall be reported. Sampling, preparation of test specimens and extracts Follow the procedures specified in 7. The titration is executed by potentiometry, using a suitable electrode as indicator.
If the solution is clear or only slightly coloured, the aggregate does not contain an amount of humus that is considered to be significant. This means that the trial mixes and mortar test specimens made with the test aggregate should be prepared on the same day as the heating procedure For factory production control purposes, it is possible to shorten the test duration by calculating the end point value using regression. Add to each bottle a mass of water equal to twice the mass of the test specimen.
NOTE 2 In many cases, it is useful to record the development of the increase in volume as dependent on time.
The content of calcium ions in the extract is subsequently determined by conductance measurements.