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.
|Published (Last):||27 February 2011|
|PDF File Size:||4.23 Mb|
|ePub File Size:||17.54 Mb|
|Price:||Free* [*Free Regsitration Required]|
By means of the potentiometric device 5. Be the washings to ensure the absence of chloride ions using the silver nitrate test 6. Complete this part of the procedure within 60 s. In the event of a reliable method being developed, the types should be redefined in terms of free MgO content.
For fine aggregates use two bottles of 2 l capacity 5. Vigorously shake the test tube again for 10 s to put any crystals of BaSO4 deposited on the base of the test tube into suspension.
BS EN 1744-1:2009+A1:2012
Filter the remainder of the solution and retain it in a third beaker marked as “C”. NOTE Organic contaminators can entrain air in mortar mixes.
Then add 2 ml of the starch solution 4. The chlorides are expressed in terms of, and reported as, the chloride ion content as a percentage by mass of the aggregate.
Prepare each mix using the procedure in After an extraction time of at least 10 min and when no further change be conductance occurs, the extraction process is completed. This standard describes the reference methods used for type testing and in cases of dispute and alternatives methods for chemical analyses of aggregates.
Then add to each 11744-1 mass of water, the mass lost by the corresponding portion of aggregate during the heating detailed in For lightweight aggregate use two bottles of 5 l capacity 5. Allow to settle until the supernatant water is more or less clear. Transfer the test specimens to the flasks, weigh the two flasks and contents and record their mass to the nearest 0,01 g.
Heat the other two test specimens using the procedure in It is the 174-1 aim of BSI to improve the quality of our 144-1 and services. Please fill this form, we will try to respond as soon as possible. If no pieces disintegrate or crack, the sample shall be regarded as having passed the test. 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.
If any pieces disintegrate or crack in the second test the sample shall be regarded as having failed the test. Use a pipette to transfer 50 ml of 1474-1 solution from beaker B to another beaker marked as “D”. NOTE Drying at a higher temperature will oxidise any sulfides. Sampling, preparation of test specimens and extracts Follow the procedures specified in 7. Preparation of test portion Reduce the laboratory sample by the procedures specified in ENto an amount not less than 25 g.
Weigh the test specimen to the nearest 0,1 g in a 2 17444-1 beaker marked as “A” 5.
BS EN +A – Tests for chemical properties of aggregates. Chemical analysis
The standards should cover the range of sulfur content expected. One mortar contains the test aggregate as received while the other mix is prepared from a duplicate 1744-1 portion which has been heated to destroy organic matter. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. Filter as much of the dn liquid as is practical on a pre-weighed medium-grade filter paper 5.
The start and finish of text introduced or altered by amendment is indicated in the text by tags. These sets are listed in literature, i. Preparation of test portion Reduce the laboratory bz by the procedures specified in EN to an amount ej less than the mass specified in Table 1 7.
Copyright All the data, software and documentation set out in all British Standards and other BSI publications are the property of and copyrighted by BSI, or some person or entity that owns copyright in the information used such as the international standardization bodies has formally licensed such information to BSI for commercial publication and use.
You may find similar items within these categories by selecting from the choices below:. Note the mass of water contained in this last mix and calculate the water-cement ratio.
Chemical analysis of cement ENBuilding lime — Part 2: The parts should be weighed, heated and reweighed separately; and recombined when cool. Cover the beaker with a watch glass 5. The titration is executed by potentiometry, using a suitable electrode as indicator.
Unless otherwise stated, all volumetric glassware shall be of class B accuracy as defined in ISO When a test portion of the fine aggregate is immersed in a liquid with a density just below 2,0, lower density particles will float on be surface. The water container in the steam unit normally is of a size that makes it necessary to top up with water during the test. The factor F of this solution is calculated from the following equation: Coarse iron fragments remaining on the sieve shall be removed.
Subject to Clause 1. The absorbance of the blank solution should always be established and deducted from 174-1 test solution. The factor f of this solution is calculated from the following sb Add the filter paper and the retained particles to the aggregate in 1744-1 basin.
Want access to British Standards? Break up the solids with the flattened b of a glass-stirring rod. The values are not directly indicative of those expected in the field, i. It supersedes BS EN 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.