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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Take the indicated quantity of distilled or demineralized water using a pipette and pour it into a test tube. This is established by dissolving known quantities of calcium sulfate in hot water 1744–1 measuring the absorbance of the test solutions. Weigh each bottle with its gs and record the mass to the nearest 1 g.
For lightweight aggregates add 1 l water. X is the average of the test results. Add to each bottle a mass of water equal to the em of aggregate. Remove from the source of heat and, while stirring, sprinkle the test portion on to the acid solution. When presence of slowly reacting particles is suspected, examine the particles visually to assess as well as possible their propensity to cause staining in mortar or concrete. Each individual test portion shall be combined separately with the above-mentioned size distribution.
NOTE Other types of vibrating table, a Proctor hammer or a hand-held vibrating hammer may be suitable.
NOTE 3 Unless otherwise stated reagent solutions may be assumed to have long-term stability. Figure 6 — Drill diagram of the cylinder base 5. Record the stiffening times of the duplicate test portions of unheated and heated control aggregates. Record the mass of the dried test portion m9 to the nearest 0,1 g.
Preparation of test portion Reduce the laboratory sample by the procedures specified in EN to an amount not less than the mass specified in Table 1 7.
If a white precipitate forms, filter through a medium grade filter paper and wash thoroughly with hot distilled water. 1744-
Chemical analysis of cement ENBuilding lime — Part 2: Measure 50 ml of anhydrous ethanediol 4. The absorbance of the blank solution should always be established and deducted from the test solution. Add a small amount 174-1 filter paper pulp and warm up the content of the beaker to below the boiling point.
NOTE Drying at a higher temperature will oxidise any sulfides. Weigh the test portion to the nearest 0,1 mg m16 and transfer into the flask.
Then add 2 ml of starch solution 4. Make a correction for loss of intensity of the X-ray tube.
Each mineral is characterized 1744-1 a set of specific d-values and corresponding intensity ratios. For lightweight aggregate, add 1 l of water. Filter the residue through a medium filter paper into a ml beaker. NOTE 2 The value of factor F for the solution should be calculated using the mean value of three determinations, expressed to three decimal places. The heated aggregate acts as a control alongside which the original aggregate is compared.
Each mortar mix shall also contain CEM I cement of mass one quarter that of the aggregate mass in the mix. If this happens, repeat the test by boiling the solution for 5 min on a hot plate 5. In the case of lightweight aggregates, the two test portions shall each have a volume of about 1 l.
Remove the hot plate, ej to cool, then filter under vacuum through the glass microfibre filter 5. The solution should be discarded when it becomes discoloured.
Complete this part of the procedure within 60 s. This information is given for the convenience of users of this European Standard and does not constitute an endorsement by CEN of the product named. Ignite the precipitate for at least 1 h gs the stated temperature. BSI is incorporated by Royal Charter.
BS EN +A – Tests for chemical properties of aggregates. Chemical analysis
Determination of loss on ignition! Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.
This standard forms sb of a series of tests for chemical properties of aggregates. Customers who vs this product also bought BS EN Pipette 25 ml of silver nitrate solution 4. Pipette 20 ml of the standard potassium iodate solution into a ml conical flask and dn with approximately ml of water.
Fasten the watertight bottle closures and mix the contents by shaking at least 20 times. ENEN If the increase in volume is taken as a function of the time, a detailed interpretation of the test results can be undertaken by means of the graph starting climb, asymptotic approach to a limit value. NOTE 1 The solution should be stable for at least two weeks. Distribute the glass beads evenly within the test cylinder so that they give a level surface.
Method for determination of acid-soluble material in fine aggregate Superseded but remains bx.
BS EN 1744-1:2009+A1:2012
We bd cookies to make our website easier to use and to better understand your needs. Cool the basin and then weigh the lightweight particles m10to the nearest 0,1 g. NOTE The value of factor k for the solution should be calculated using the mean value of three determinations, expressed to three decimal places.