BS EN 12697-31:2019 – TC:2020 Edition
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Tracked Changes. Bituminous mixtures. Test methods – Specimen preparation by gyratory compactor
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 69 |
This document specifies the method for compaction of cylindrical specimens of bituminous mixtures using a gyratory compactor. The method is used for: – determination of the air voids content of a mixture for a given number of gyrations or derivation of a curve density (or void content) versus number of gyrations; – preparation of specimens of given height and/or at a predetermined density, for subsequent testing of their mechanical properties. Annex A and Annex B describe method of complying for the equipment. This document applies to bituminous mixtures (both those made up in laboratory and those resulting from work site sampling), with an upper aggregate size not larger than 31,5 mm.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | compares BS EN 12697-31:2019 |
| 2 | TRACKED CHANGES Text example 1 — indicates added text (in green) |
| 45 | undefined |
| 51 | 1 Scope 2 Normative references 3 Terms, definitions and symbols 3.1 Terms and definitions |
| 52 | 3.2 Symbols |
| 54 | 4 Principle 5 Apparatus 5.1 Test device |
| 55 | 5.2 Metallic moulds 5.3 Round metallic inserts 5.4 Device for measuring the distance between inserts 5.5 Device for counting the number of rotations with a precision of one revolution 5.6 Other usual equipments |
| 56 | 6 Preparation of specimens 6.1 Mass of mixture to be introduced in the mould 6.1.1 Preparation of specimens for further mechanical testing 6.1.2 Preparation of specimens for void content requirement 6.1.2.1 Dry mixtures 6.1.2.2 Mixtures with a water content w |
| 57 | 6.2 Preparation of mixtures |
| 58 | 7 Test procedure 7.1 Preliminary setting 7.1.1 Pre-load stress 7.1.2 Stress 7.1.3 Setting of the angle of inclination 7.1.4 Speed of rotation 7.1.5 Temperature 7.2 Compaction 7.2.1 Start of compaction 7.2.2 Specimens for void content requirement |
| 59 | 7.2.3 Specimens for further testing 8 Precision |
| 60 | 9 Test report |
| 61 | Annex A (normative)Procedure for setting the stress for types of gyratory compactor for compactability test A.1 General A.2 Principle A.3 Gyratory-type testing procedure A.3.1 Force adjustment A.3.2 Angle |
| 62 | Annex B (normative)Procedure to evaluate the gyratory compactor (GC) internal angle of gyration and related parameters using simulated loading B.1 General B.2 Principle B.3 Procedure B.3.1 Calibration procedure with internal load simulator device B.3.2 Calibration procedure with dynamic angle validator device |
| 63 | B.4 Calculation of results B.4.1 Calculation of results for calibration procedure with internal load simulator device |
| 64 | B.4.2 Calculation of results for calibration procedure with dynamic angle validator device |
| 65 | B.5 Compliance B.6 Precision and bias |
| 66 | B.7 Report |
