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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While stirring vigorously and maintaining the solution fn boiling point, add drop-by-drop 5 ml of the barium chloride solution 4. Wash the filter and its contents with several ml of water and collect this in a test tube. Table 2 — Proportions of mass per grain size class Sizes Percentage mm in mass 0 to 0,5 15 0,5 to 2 ej 2 to 5,6 20 5,6 to 8 10 8 to 11,2 11 11,2 to 16 14 16 to 22 15 Total NOTE 1 if there are great differences in the particle densities of the individual grain size classes, the mineral mixture can be combined using proportion of volume.
Calculate the mass of aggregate in each bottle by difference.
Apparatus for general purposes 5. X is the average of the test results. Ensure that none of wn heavier aggregate particles pass into the sieve. Cover the bowl with a damp cloth and allow to stand for 5 min.
11744-1 are a non-profit group that run this website to share documents. Each mortar mix shall also contain CEM I cement of mass one quarter that of the aggregate mass in the mix.
Sieving method BS EN Stop the flow of gas. Amends and replaces BS EN They are prepared by pipetting ml of the solutions 4. Add the specified amount of barium chloride solution 4.
BS EN 1744-1:2009+A1:2012
Worldwide Standards We can source any standard from anywhere in the world. These sets are listed in literature, i. This document Older versions.
Weigh the bottles and contents and 17444-1 their mass to the nearest 1 g. To prepare this solution, make up 17 ml of hydrochloric acid 4. If the solution is clear or only slightly coloured, the aggregate does not contain an amount of humus that is considered to be significant.
Weigh two ml Erlenmeyer flasks 5. The heated aggregate acts as a control alongside which the original enn is compared. 17744-1 the bottle to enable air bubbles to escape. Reject the trial mixes. If water is added to the sample to facilitate compaction, testing shall commence within 24 h of the completion of the compaction process. NOTE 2 Where no tolerances are given for reagent volumes or masses, the values quoted are approximate.
The intensity of the colour increases as the concentration of fulvo acids increases. We need your help to maintenance this website. Take approximately 1 g of this material as the test portion. The water-soluble sulfate content is then determined by spectrophotomery.
BS EN +A – Tests for chemical properties of aggregates. Chemical analysis
For lightweight aggregate use two bottles of 5 l capacity 5. NOTE With some aggregates, e. NOTE 1 If the aggregate contains sulfides, e. Gently agitate the bed of aggregate with a glass rod to assist lightweight particles to leave the bed and rise to the surface of the solution. The chloride ions are precipitated from the extracts by means of a standard silver nitrate solution.
For dated references, only the edition cited applies.
Note the volume V8 of the silver nitrate solution used. After the indicated resting time for the apparatus, record the result as C0. Transfer the test specimens 7. Add 2 ml of 3,5,5-trimethylhexanol 4. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.
Determination of strength EN NOTE If the titration is conducted by means of a recording pH meter, the filtration of the extract is not necessary. Methods for sampling ENTests for general properties of aggregates — Part 2: