Home / PT Schemes / Interlaboratory technical project МС 01/2026 (Ongoing)

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Dear Colleagues,

PT provider UCLSB invites you to take part in Interlaboratory Technical Project MC 01/2026. Test subjects will be: Asphalt /bituminous/ mixtures, according to the standards and indicators specified in the following table:

Test subjectCode of the standardName of the standardType/characteristic of testRange of expected values
Asphalt /bituminous/ mixturesEN 12697-6, Procedure В (9.3)Bituminous mixtures - Test methods for hot mix asphalt - Part 6: Determination of bulk density of bituminous specimensBulk density(2.355-2.390) Мg/m3
EN 12697-5, Procedure А (9.2)Bituminous mixtures - Test methods for hot mix asphalt - Part 5: Determination of the maximum densityMaximum density(2.500-2.525) Мg/m3
EN 12697-8, clause 4Bituminous mixtures - Test methods for hot mix asphalt - Part 8: Determination of void characteristics of bituminous specimensAir voids content(4.0-7.0)%
EN 12697-34Bituminous mixtures - Test methods for hot mix asphalt - Part 34: Marshall testStability(9-12) KN
EN 12697-34Bituminous mixtures - Test methods for hot mix asphalt - Part 34: Marshall testFlow(2.0-5.0) mm
EN 12697-1Bituminous mixtures - Test methods for hot mix asphalt - Part 1: Soluble binder contentSoluble binder content/three determinations/(4.0 – 6.0)% bitumen related to the asphalt mixture
EN 12697-2Bituminous mixtures - Test methods - Part 2: Determination of particle size distributionParticle size distribution/three determinations/% passed through sieves #12,5 mm ;#8mm; #4mm; #2mm; #1mm; #0.500 mm; #0.250mm; #0.125 mm;#0.063mm

Legend:

Additional information regarding Interlaboratory Technical Project (ITP) MC 01/2026.

Deadline for accepting applications for participation: 15.04.2026;

• Sending the samples to the participants: by 10.05.2026 at the latest;

• Conducting the tests: 16-06-19.06.2026.;

• Preparation of the final report: no later than 25.07.2026;

Detailed information will be given in the instruction for conducting the interlaboratory comparison and proficiency test. You will be informed about all other changes that may be imposed during the course of MC 01/2026 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 which is pointed as a beginning of the relevant project is the date when acceptance of the applications starts.

** Requests for the relevant project, in English and Bulgarian, can be found in the "PT schemes" section of our website: https://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.

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.

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