Dear Colleagues,
PT provider UCLSB invites you to take part in Interlaboratory Technical Project MC 03/2026. Test subjects will be: Hardened concrete, according to the pointed standards and parameters (characteristics) in the following table:
| Test subject | Code of the standard | Name of the standard | Type/characteristic of test |
|---|---|---|---|
| Hardened Concrete | БДС EN 12390-3 | Testing hardened concrete - Part 3: Compressive strength of test specimens. | Compressive strength |
| БДС EN 12390-7 | Testing hardened concrete - Part 7: Density of hardened concrete. | Density of hardened concrete |
- “Invitation for participation” in MC 01/2026;
- “Application form” for MC 01/2026;
- "Detailed plan for proficiency testing" for MC 01/2026;
Legend:
Additional information regarding Interlaboratory Technical Project (ITP) MC 03/2026.
Deadline for accepting applications for participation: 15.06.2026;
• Payment deadline: by 15.06.2026 at the latest;
• Sending the samples to the participants: by 31.08.2026 at the latest;
• Conducting the tests: 19.10.2026 -21.10.2026.;
• Preparation of the final report: no later than 31.11.2026;
Detailed information will be given in the instruction for conducting the interlaboratory comparison and proficiency test QF 7.2-5. You will be informed about all other changes that may be imposed during the course of MC 03/2026 by e-mail.
Please, in case you have any questions, do not hesitate to contact us via e-mails [email protected] or [email protected]!
*The date indicated as the start of the respective project is also the date from which the acceptance of participation requests begins.
** Requests for the relevant project, in English and Bulgarian, can be found in the "PT schemes" section of our website: http://www.ptprovider.sslsb.org/
*** The due date of the relevant project means that this is the deadline for the preparation of the report, unless otherwise stated in the instruction (QF 7.2-5).
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.