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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NOTE If only a small furnace is available, each test portion can be divided into two or more parts. Cover the beaker with a watch glass 5. Allow to settle until the supernatant water is more or less clear. Add 2 ml of 3,5,5-trimethylhexanol 4. To each flask, add a mass of water equal fifty times the mass of the test specimen.
It is strongly recommended that this procedure is used as a preliminary check before using the test specified in Clause 7 to confirm compliance with a specification, if necessary. The absorbance bx the blank solution should always be established and deducted from the test solution. Leave the solution to cool to room temperature and store in a glass bottle 5. ENEN Determination of particle size distribution — Test sieves, nominal size of apertures ENMethods of test for mortar for masonry — Part 4: Add the specified amount of barium chloride solution 4.
Please fill this form, we will try to respond as soon as possible. Above the heating chamber is the compressed slag specimen in a cylinder with a perforated base, an internal diameter of about mm and a height of about mm. NOTE With some aggregates, e.
BS EN +A – Tests for chemical properties of aggregates. Chemical analysis
Check the alkalinity een using methyl red as an indicator 4. Follow the procedures outlined for the determination specified in Record the mass of the dried test portion m9 to the nearest 0,1 g.
Prepare each mix using the procedure in The start and finish of text introduced or altered by amendment is indicated in the text by tags! Weigh to the nearest 0,1 mg and calculate the mass of precipitate m7. Transfer the test specimens to the flasks, weigh the two flasks and contents and record their mass to the nearest 0,01 g. Wash the contents of the filter at least 3 times with a little hot, demineralised water, reserve the filtrates and reject the precipitate if any.
BS EN 1744-1:2009+A1:2012
Size px x x x x An appropriate accelerator should be used for example, tungsten trioxide or vanadium pentoxide. It supersedes BS EN Place the crucible in the electric furnace 5. NOTE Organic contaminators can entrain air in mortar mixes.
Allow the flask and its contents to stand for 4 h, shaking it occasionally. When presence of slowly reacting particles is e, examine the particles visually to assess as well as possible their propensity to cause staining in mortar or concrete.
The watersoluble sulfate content is determined by precipitation at pH between 1 and 1,5 by a solution of barium chloride, at the boiling point. Specifies reference procedures, and in certain cases an alternative method, for the chemical analysis of aggregates. Add by pipette 5 ml of sodium chloride solution 4. Use a pipette to transfer 50 ml of buffered solution from beaker B to another beaker marked as “D”.
To distinguish between these two forms of lime, extra tests are necessary, such as thermo gravimetric or X-ray diffraction analysis. Cover the buffered solution in 144-1 B and the retained solution in beaker C with a watch glass. Spectrophotometer NOTE The water-soluble sulfate content is obtained from the measured absorbance using a calibration graph.
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