Tests on concrete prestressing steels

Presentation for participants

Reference of the ILC: G21PS
References of test methods: ISO 15630-3
References of test methods for which the ILC can indirectly provide an assessment of performance ASTM A1061
These may be superseded standards, which some of the reference standards may have replaced, or EN or ASTM or ISO standards that are close but not exactly equivalent to the reference standards.
Frequency: This ILC can be organised this year thanks to our preregistration procedure, which ensures an enough number of participants.
Main characteristics: Fm, Fp0,1, Agt, E, LM (Linear mass)
Other characteristics: Rp0,2, P, hb
Caution: The number of determinations may be low for the secundary characteristics, what may make inefficient the comparison between laboratories
Determination of the assigned values (“true values” for each characteristic): By statistical computation of the totality of the results with possible selection on competence criteria (accreditation, validation by a reference body, quantity of tests performed in the year), test to detect possible collusion, merging of results not obtained in reproductibility conditions, suppression of technically unvalid results.
Type of statistical computation: For numerical results, the statistical computation will provide an assigned value with its attached uncertainty, values of standard deviations for repeatability and reproductibility, limits of alerts for bias and repeatability of the participant, indiviual values for uncertainty of results of participants.
Number of products submitted to tests: 1
Number of samples per participation: 6
Max number of operators per participation: 1 (it is necessary to order as many participations as there are participating test operators)
Product submitted to tests: Prestressing strand for concrete
Type of samples: Strands
Approximate dimensions of samples: T5,2 - 12,9 mm - L=1100 mm*
Specific preparation to be performed by the participant:  None (other than possible necessity to adapt dimensions of the test specimen to the equipment of the participant)
Special notice for this ILC: *: For this program, longer samples can be supplied on request (please request at the moment of registration).
Time schedule:
Opening date of registrations 20/04/2021
Registration deadline 30/06/2021
Date of shipment of samples 05/09/2021
Start of the tests 15/09/2021
Deadline for carrying out the tests and providing the results 31/10/2021
Date of delivery of reports 15/12/2021
Note: After the deadline, registrations are only accepted within the limit of availability of samples
Price (€) 500
Price if online payment (€) 400
Approximate weight (kg) 10