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):||4 June 2004|
|PDF File Size:||5.18 Mb|
|ePub File Size:||8.81 Mb|
|Price:||Free* [*Free Regsitration Required]|
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. Accept and continue Learn more about the cookies we use and how to change your settings. Supersedes BS EN Cool the crucible in a desiccator 5.
After crushing, these samples are analysed in accordance with Leave it to stand for 24 h. X is the average of the test results. Preparation of test portion Reduce the laboratory sample by the procedures specified in ENto an amount not less than 25 g.
BS EN 1744-1:2009+A1:2012
Transfer the test specimens obtained as specified in 1744-1 The diffracted intensity by free lime CaO is measured for each of the samples in accordance with For example, text altered by CEN amendment A1 is indicated by! For ej aggregate use two bottles of 5 l capacity 5. The solution should be discarded vs it becomes discoloured. Dilute to ml with water and add 10 ml be hydrochloric acid solution 4.
The testing time in the steam test depends of the composition of slag. Free to use BIM project management tool provides step-by-step help to define, manage and validate responsibility for information development and delivery at each stage of the asset life cycle in level 2 BIM projects. Repeat the determination described in If the difference between two determinations is more than twice the repeatability standard deviation, repeat the test and take the mean of the two closest values.
Remove from the source of heat and, while stirring, sprinkle the test portion on to the acid solution. Any evolved water vapour should be efficiently trapped. Make up to the mark with freshly boiled and cooled water. Use ICH for all further calculations.
Check the pH value of the solution using pH meter 5. NOTE 1 A blue-green gelatinous precipitate of ferrous sulfate should form within 5 min. When aggregates containing sulfides e. Mr George Calvar Date: Add the thiocyanate solution from a burette 5. 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.
The chlorides are expressed in terms of, and reported as, the chloride ion content as a percentage by mass of the aggregate. Take the smart route to manage medical device compliance.
Transfer the test portion into the bottles. Take the indicated quantity of distilled or demineralized water using a pipette and pour it into a test tube. Discard the residue and continue as below.
Leave the solution to cool to room temperature and store in bss glass bottle 5. Add the specified amount of barium chloride solution 4. Acidify with nitric acid HNO3 4. Procedure The minimum quantity of fine aggregate in the laboratory sample shall be 5 kg. Cool the crucible to room temperature in a desiccator 5. Disconnect the outlet tube, which will serve as a stirrer during the titration. The principle of the method is to prepare two nominally identical mortars and test them for stiffening rate and compressive strength.
Method for determination of water-soluble chloride salts Withdrawn.
BS EN +A – Tests for chemical properties of aggregates. Chemical analysis
The stiffening test assesses acceleration or retardation of the setting of the mortar, while the day strength indicates any longer term effect. The humus content of aggregate is estimated from the colour formed when a test portion is shaken in a sodium hydroxide solution. This publication does not purport to include all the necessary provisions of a contract. Standardize the solution at weekly intervals, or before use if the tests are less frequent.
Make the solution alkaline by adding ammonium hydroxide 4.
Subject as expressly provided in these Conditions and to the fullest extent permitted by law all warranties conditions or other Terms and duties implied by statute or common law are excluded. Adjust the displacement indicator vertically in the centre of the perforated plate and enn it to a rigid support on the steam unit. In this case, the method does not give a definitive conclusion.
Record whether the colour of the solution is lighter or darker than the standard colour. Sieve the dried particles on a 4 mm sieve 5. Then lay the perforated plate, the surcharge support and the surcharge on top of the beads. Place the filter paper and its contents into a crucible, which has been previously ignited and tarred. Ensure e none of the heavier aggregate particles pass into 1474-1 sieve.