BS EN 459-2:2010 Building lime Part 2: Test methods

BS EN 459-2:2010 pdf free download.Building lime Part 2: Test methods.
BS EN 459-2 specifies the methods used for the chemical analyses and the determination of physical properties of building limes.
This document describes the reference methods and, in certain cases, an alternative method which can be considered to be equivalent. In the case of a dispute, only the reference methods are used.
Any other methods may be used provided they are calibrated, either against the reference methods or against internationally accepted reference materials, in order to demonstrate their equivalence.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 196-1:2005, Methods of testing cement — Part 1: Determination of strength
EN 196-3, Methods of testing cement — Part 3: Determination of setting times and soundness
EN 196-7, Methods of testing cement — Part 7: Methods of taking and preparing samples of cement
EN 459-1:2010, Building lime — Part 1: Definitions, specifications and conformity criteria
EN 932-1, Tests for general properties of aggregates — Part 1: Methods for sampling
EN ISO 6506-1:2005, Metallic materials — Brinell hardness test — Part 1: Test method (ISO 6506-1:2005)
3 Sampling
3.1 General
Sampling shall be carried out as specified in 3.2 to 3.4 taking into account the need to minimize moisture and carbon dioxide absorption. Samples shall therefore be transported and stored in air-tight containers and all the handling shall be carried out as quickly as possible.
3.2 Sampling of powdered material
Sampling shall be carried out in accordance with EN 196-7.
3.3 Sampling of granular material
Sampling shall be carried out in accordance with EN 932-1.
3.4 Sampling of lime putty and milk of lime
The spot sample size shall be (10土5) dm3.
Where lime putty or milk of lime is sampled, the increments shall be blended thoroughly.
3.5 Preparation of the test portion
Before carrying out the analysis, the sample shall be reduced in mass by means of a sample divider and/or by quartering to produce a homogeneous test sample of suitable mass for the intended determinations. Lime putty and milk of lime shall be dried before the chemical analysis (see 5.4.4.2).
The sample preparation for the appropriate test is described in Table 1.
4 General requirements for testing
4.1 Number of tests
Analysis of a building lime may require the determination of a number of its chemical properties. For each determination one or more tests shall be carried out in which the number of measurements to be taken shall be as specified in the relevant clause of this standard.
Where the analysis is one of a series subject to statistical control, determination of each chemical property by a single test shall be the minimum required.
Where the analysis is not part of a series subject to statistical control, the number of tests for determination of each chemical property shall be 2 (see also 4.3).
In the case of a dispute, the number of tests for determination of each chemical property shall be 2 (see also
4.3).
4.2 Repeatability and reproducibility
Repeatability — Precision under repeatability conditions where independent test results are obtained with the same method on identical test items (material) in the same laboratory by the same operator using the same equipment within short intervals of time.
Reproducibility — Precision under reproducibility conditions where test results are obtained with the same method on identical test items (material) in different laboratories with different operators using different equipment.
Repeatability and reproducibility in this document (see Annex B) are expressed as repeatability standard deviation(s) and reproducibility standard deviation(s) in e.g. absolute percent, grams, etc.. according to the property tested.
4.3 Expression of masses, volumes, factors and results
Express masses in grams to the nearest 0,001 g and volumes from burettes in millilitres to the nearest 0,05 ml.
Express the factors of solutions, given by the mean of three measurements, to three decimal places.
Express the results, where a single test result has been obtained, as a percentage generally to two decimal places.
Express the results, where two test results have been obtained, as the mean of the results, as a percentage generally to two decimal places.
If the two test results differ by more than twice the standard deviation of repeatability, repeat the test and take the mean of the two closest test results.
The results of all individual tests shall be recorded.
4.4 Blank determinations
Carry out a blank determination without a sample, where relevant, following the same procedure and using the same amounts of reagents. Correct the results obtained for the analytical determination accordingly.
4.5 Reagents
Use only reagents of analytical quality. References to water mean distilled or deionised water having an electrical conductivity S 0,5 mS/m.
Unless otherwise stated percent means percent by mass.
For the concentrated liquids used to make up the reagents in this standard the densities (p) are given in grams per mililire at 20 °C. The degree of dilution is always given as a volumetric sum, for example: dilute
hydrochloric acid 1 + 2 means that one volume of concentrated hydrochloric acid is to be mixed with two volumes of water.
The concentrations of reference and standard volumetric solutions are specified as amount-of-substance concentrations, c (mol/).
4.6 Evaluation of test results
4.6.1 General
The chemical requirements for building limes are specified in EN 459-1:2010, Tables 2, 9, 16, 20 and 24.
4.6.2 Test results for quicklime
For quicklime the specified values correspond to the finished product.
4.6.3 Test results for all other types
For all other types (hydrated lime, lime putty, milk of lime, lime with hydraulic properties) the values are based on the product after subtraction of its free water and bound water content. The values obtained by application of procedures described in this European Standard for total calcium oxide and magnesium oxide (5.2), magnesium oxide (5.2), sulfate (5.3) and carbon dioxide (5.5 or 5.6) are for the products without subtraction of the free water and bound water content. To compare these values with EN 459-1:2010, Tables 2 or 9. they shall first be corrected by multiplication by factor F. Factor F shall be determined in the following way:
Determine the carbon dioxide content as described in 5.5 or 5.6 and the loss on ignition as described in 5.7. The loss on ignition is the sum of the free water, bound water and carbon dioxide, provided that the sample does not contain any highly volatile compounds or oxidizable constituents. Calculate the total (free + bound) water content H.1- as a mass fraction in percent of the sample using:
= loss on ignition in % — carbon dioxide content in percent Calculate the factor I” from the following equation:
F 1001(100— Ui.)
4.6.4 Test results for available lime
The values for available lime, obtained by the application of the procedure described in 5.8 correspond to either available CaO for quicklime or available Ca(OH)2 for all other types (hydrated lime, lime putty, milk of lime, lime with hydraulic properties).BS EN 459-2 pdf download.BS EN 459-2:2010 Building lime Part 2: Test methods