CEMENT LABORATORY PRODUCTS FOR CALIBRATION
REFERENCE MATERIAL SN STRENGTH
PORTLAND CEMENT (CEM I 52,5N)
Reference material cement for validation of good methodology of application of the CEN 196.1and 9
This reference cement validates your process of applying CEN 196-1 and CEN 196-9 by comparing your expected results against the results obtained by European reference laboratories
In 2 bags of 500g.
PARTICIPATION AND EXECUTION OF TESTS
Each year the “Association Technique de l’Industrie des Liants Hydrauliques” (ATILH) organises an interlaboratory test campaign involving in particular the participation of the cement production industry laboratories, the cement end-user laboratories and Research and Inspection Centers within the construction materials sector. This participation is compulsory for laboratories accredited by COFRAC for cement testing. The tests are carried out in accordance with standardised methods where latter exist, otherwise according to everyday traditional methods.
STATISTICAL ANALYSIS OF THE RESULTS
Outliers are eliminated via the STUDENT’s test with a confidence level of 98 %. A reiteration is set at this threshold in order to keep only those values which are related to the “Normal or Gaussian” distribution, the latter being entirely defined by 2 parameters: mean and standard deviation. The coefficient of variation symbolised by “V” is the ratio between the standard deviation “σ” and the mean value.
- after 1000 tests;
- when using another type of manometric liquid, another type of filter paper, a new manometer tube or a new perforated disc;
- If discrepancies are systematic with the secondary reference cement.
We can propose the equivalent to the NIST or CCRL or cement-NCBM by e-mail firstname.lastname@example.org