Fatigue test on concrete reinforcing steels

Presentation for participants

Reference of the ILC:

FA21RS

   

References of test methods:

ISO 15630-1

   

Frequency:

Each year

                       

Main characteristics:

N (Number of cycles before failure for a given σmax and a given Δσ)

   

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:

5

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:

Hot rolled reinforcing steel

Type of samples:

Bars

Approximate dimensions of samples:

2x Ø16-25x780 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) (2 test pieces per supplied sample)

                   

Special notice for this ILC:

Results have to be numerical in order to be statistically handable. The number of samples is set up at 9, in order to make the estimation of standard deviation of results statistically relevant. So, to avoid tests to last too long and avoid costs of tests too high:
1. loading values will be severe but, however, will remain reasonably close to usual conditions;
2. a special statistical procedure is used so that tests on samples showing the longest life may be stopped before rupture, saving an important amount of testing time.

   

Price (€)

400

Price if online payment (€)

320

Approximate weight (kg)

20