Dear Colleagues,
PT provider UCLSB invites you to take part in Interlaboratory Technical Project MC 03/2022. Test subjects will be: Filler and Concrete products – Concrete paving blocks, according to the pointed standards and parameters in the following table:
| Test subject | Code of the standard | Name of the standard | Tested parameters (characteristics) |
|---|---|---|---|
| Filler | EN 933-1 | Tests for geometrical properties of aggregates - Part 1: Determination of particle size distribution - Sieving method. | Particle size distribution /ua/ |
| EN 933-9 | Tests for geometrical properties of aggregates - Part 9: Assessment of fines - Methylene blue test. | Assessment of fines – Methylene blue test /ua/ | |
| EN 1097-7 | Tests for mechanical and physical properties of aggregates - Part 7: Determination of the particle density of filler - Pyknometer method. | Particle density of filler – Pyknometer method /ua/ | |
| EN 1744-1, clause 7 | Tests for chemical properties of aggregates - Part 1: Chemical analysis | Water-soluble chloride salts /ua/ | |
| EN 1744-1, clause 12 | Tests for chemical properties of aggregates - Part 1: Chemical analysis | Acid soluble sulfates /ua/ |
/ua/ - under accreditation, within the scope of accreditation of the PT provider; /oa/ - out of the scope of accreditation of the PT provider
| Test subject | Code of the standard | Name of the standard | Tested parameters (characteristics) |
|---|---|---|---|
| Concrete products – Concrete paving blocks | EN 1338:2003, Annex F | Concrete paving blocks - Requirements and test methods | Tensile splitting strength /ua/ |
| EN 1338, Annex F | Concrete paving blocks - Requirements and test methods | Failure load /ua/ | |
| EN 1338, Annex E | Concrete paving blocks - Requirements and test methods | Water absorption /ua/ |
/ua/ - under accreditation, within the scope of accreditation of the PT provider; /oa/ - out of the scope of accreditation of the PT provider
- “Invitation for participation” (QF 4.4-3) in MC 03/2022;
- “Application form” (QF 4.4-4) for MC 03/2022;
- Detailed plan for proficiency testing (QF 4.4-1) for MC 03/2022;
Legend:
* The date which is pointed as a beginning of the relevant project is the date when acceptance of the applications starts.
** Application forms for the relevant project in English and Bulgarian may be found in the “PT Schemes” section on our webpage: http://www.ptprovider.sslsb.org/
*** The end of the relevant project means that this is the deadline for the report to be prepared in case nothing else is stated in the instruction form QF 4.4-5.
/ua/ Under accredtitation (covered by the scope of accreditation) /оа/ Out of accreditation (not covered by the scope of accreditation)
Note: All participants will receive further instructions for the process of implementing the relevant PT scheme. The minimum number of participants for a parameter to be included in the relevant PT scheme is 5.