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BS EN 12697-26:2018+A1:2022:2023 Edition

BS EN 12697-26:2018+A1:2022:2023 Edition

$189.07

Bituminous mixtures. Test methods – Stiffness

Published By Publication Date Number of Pages
BSI 2023 50
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This European Standard specifies the methods for characterizing the stiffness of bituminous mixtures by alternative tests, including bending tests and direct and indirect tensile tests. The tests are performed on compacted bituminous material under a sinusoidal loading or other controlled loading, using different types of specimens and supports. The procedure is used to rank bituminous mixtures on the basis of stiffness, as a guide to relative performance in the pavement, to obtain data for estimating the structural behaviour in the road and to judge test data according to specifications for bituminous mixtures. As this standard does not impose a particular type of testing device the precise choice of the test conditions depends on the operating scope and working range of the device used. For the choice of specific test conditions, the requirements of the product standards for bituminous mixtures should be respected. The applicability of this document is described in the product standards for bituminous mixtures.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
10 3.2 Symbols
11 4 Principle
5 Sample preparation
5.1 Age of the specimens
5.2 Drying of the specimens
5.3 Dimensions and bulk density of the specimens
12 5.4 Number of test specimens
6 Checking of the testing equipment
7 Test methods
7.1 General
7.2 Codification of tests
7.2.1 Sinusoidal bending tests
13 7.2.2 lndirect tensile test (pulse or cyclic)
7.2.3 Cyclic or monotonous uniaxial tests
7.2.4 Loading conditions
7.2.5 Load amplitudes
7.2.6 Loading frequencies
14 7.3 Controlled strain rate loading
7.3.1 Test method
7.3.2 Loading conditions
7.3.3 Strain amplitudes for direct tensile tests
7.3.3.1 Preliminary test
7.3.3.2 Strain amplitudes during the test
15 7.3.3.3 Test loading times
8 Temperatures
9 Expression of results
17 10 Test report
10.1 Introduction
10.2 General
10.3 Information on specimens
10.4 Information on test method
18 10.5 Information on the test and results
10.6 Optional information
11 Precision
19 Annex A (normative)Two point bending test on trapezoidal specimens (2PB-TR) or on prismatic specimens (2PB-PR)
A.1 Principle
A.2 Equipment
20 A.3 Specimen preparation
21 A.4 Procedure
22 Annex B (normative)Three point bending test on prismatic specimens (3PB-PR) and four point bending test on prismatic specimens (4PB-PR)
B.1 Principle
23 B.2 Equipment
24 B.3 Specimen preparation
B.3.1 Dimensions
B.3.2 Sample manufacture
25 B.4 Procedure
26 Annex C (normative)Test applying indirect tension to cylindrical specimens (IT-CY)
C.1 Principle
C.2 Equipment
C.2.1 General devices
C.2.2 Test equipment
31 C.3 Specimen preparation
32 C.4 Mode of operation
C.4.1 Mounting the specimen
C.4.2 Stiffness measurement
C.4.2.1 Conditioning load pulses
C.4.2.2 Deformation measuring
C.4.2.3 Calculation of the stiffness modulus
33 C.4.2.4 Stiffness modulus of the specimen
34 Annex D (normative)Direct tension-compression test on cylindrical specimens (DTC-CY)
D.1 Principle
D.2 Equipment
D.3 Specimen preparation
36 D.4 Mode of operation
D.4.1 Stabilizing the specimen
D.4.2 Procedure
37 Annex E (normative)Test applying direct tension to cylindrical specimens (DT-CY) or to prismatic specimens (DT-PR)
E.1 Principle
E.2 Equipment
E.3 Specimen preparation
E.3.1 Cylindrical specimen
38 E.3.2 Prismatic specimen
E.4 Mode of operation
E.4.1 Stabilization of the specimen
E.4.1.1 Temperature stabilization
E.4.1.2 Preliminary mechanical stabilization
39 E.4.1.3 Mechanical stabilization between tests
E.4.2 Procedure
40 E.5 Derivation of the master-curve – Isotherms
41 Annex F (normative)Test applying cyclic indirect tension to cylindrical specimens (CIT-CY)
F.1 Principle
F.2 Equipment
F.2.1 Test machine
F.2.2 Loading
F.2.3 Displacement
43 F.2.4 Thermostatic chamber
F.2.5 Recording and measuring system
F.2.6 Loading strips
F.3 Specimen preparation
F.3.1 Test specimen
44 F.3.2 Specimen dimensions
F.4 Mode of operation
F.4.1 Test temperature
F.4.2 Mounting the specimen
F.4.3 Procedure
F.4.3.1 General
45 F.4.3.2 Load frequency
F.4.3.3 Definition of the lower load level
F.4.3.4 Definition of the upper load level
F.4.4 Checking of specimen deterioration
46 Annex G (informative)Derivation of the master curve
G.1 Principle
47 G.2 Theoretical background
48 G.3 Experimental data
49 G.4 Test report

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BS EN 12697-26:2018+A1:2022
$189.07