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BS EN 14771:2023

BS EN 14771:2023

$102.76

Bitumen and bituminous binders. Determination of the flexural creep stiffness. Bending Beam Rheometer (BBR)

Published By Publication Date Number of Pages
BSI 2023 22
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This document specifies a method for the determination of the flexural creep stiffness of bitumen and bituminous binders in the range of 30 MPa to 1 GPa by means of the bending beam rheometer. The method can be applied to a variety of bitumens, including unmodified as well as modified binders, as fresh (unused) binders, as well as binders after laboratory ageing conditioning (e.g. EN 12607-1, EN 14769), and also binders that have been recovered from asphalt mixtures. WARNING – The use of this document can involve hazardous materials, operations and equipment. This document does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this document to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 1 Scope
2 Normative references
3 Terms and definitions
8 4 Principle
5 Apparatus
9 6 Preparation of test samples
6.1 General
6.2 Preparation of moulds
10 6.3 Preparation of test specimen
7 Procedure
7.1 Measurement
11 7.2 Deflection in a valid determination
8 Calculation
8.1 General
12 8.2 Measured stiffness
8.3 Calculated stiffness
8.4 m-value
13 8.5 Validity of the results
9 Expression of results
10 Precision
10.1 Repeatability, r
10.2 Reproducibility, R
11 Test report
17 Annex A (informative)Calculation of T (m = 0,300), T (S = 300 MPa) and respective m-value at T (S = 300 MPa)
20 Annex B (informative)Calculation of Ī”Tc

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BS EN 14771:2023
$102.76