Väylä

Toimialayhteisö: Väylä
Komitea: CEN/TC 226 (Road equipment)
Alkuperä: CEN
Määräpäivä: 2020-03-19
LaajennaSupista
 
This European standard specifies requirements, performance parameters and test methods for active road studs intended for use as permanent and temporary road marking materials. Requirements and test methods for induction, fibre optic or other power transmission systems for active road studs are not included in this standard.
Toimialayhteisö: Väylä
Komitea: CEN/TC 227 (Road materials)
Alkuperä: CEN
Määräpäivä: 2020-04-02
LaajennaSupista
 
This document describes a test method to determine the friction at 60 km/h after polishing during a fixed number of passes on surfaces of bituminous mixtures samples, or to follow its evolution as a function of the number of polishing passes.The samples used are either produced in a laboratory or are cores taken from the site.NOTE This procedure was previously known as Wehner and Schulze method (see [1]).
Toimialayhteisö: Väylä
Komitea: CEN/TC 227 (Road materials)
Alkuperä: CEN
Määräpäivä: 2020-04-16
LaajennaSupista
 
This European Standard specifies three test methods (A1, A2 and B) for determining the resistance of bituminous mixtures to permanent deformation by cyclic compression tests with confinement. The tests make it possible to rank various mixtures or to check on the acceptability of a given mixture. They do not allow making a quantitative prediction of rutting in the field to be made.Test methods A1 and A2 describe methods for determining the creep characteristics of bituminous mixtures by means of a uniaxial cyclic compression test with some confinement present. In this test a cylindrical test specimen is subjected to a cyclic axial stress. Method A2 is preferred for mastic asphalt and Method A1 for other asphalt mixtures. To achieve a certain confinement, the diameter of the loading platen is taken smaller than that of the test specimen. In test method A1, the test specimen is loaded by block-pulses whereas in method A2 haversine loading with rest time is applied.Test method B describes the method for determining the creep characteristics of bituminous mixtures by means of the triaxial cyclic compression test. In this test a cylindrical test specimen is subjected to a defined confining stress and a cyclic axial stress. This test is most often used for the purpose of evaluation and development of new types of mixtures.This European Standard applies to test specimens prepared in the laboratory or cored from the road. The maximum size of the aggregates is 32 mm.NOTE 1 Confinement of the test specimen is necessary to simulate realistic rutting behaviour, especially for gap-graded mixtures with a large stone fraction.NOTE 2 For the purpose of Type Testing, the test conditions are given in EN 13108-20.