Väylä

Toimialayhteisö: Väylä
Komitea: CEN/TC 226 (Road equipment)
Alkuperä: CEN
Määräpäivä: 2020-04-10
LaajennaSupista
 
This document defines the accuracy, credibility and confidence in the results of virtual crash test to roadside safety devices through the definition of procedures for verification, validation and development of numerical models for roadside safety application. Finally it defines a list of indications to ensure the competences of an expert/organization in the domain of virtual testing.
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.
Toimialayhteisö: Väylä
Komitea: CEN/TC 227 (Road materials)
Alkuperä: CEN
Määräpäivä: 2020-05-28
LaajennaSupista
 
This document provides core product category rules for type III environmental declaration of bituminous materials for building and civil engineering according to EN 13108-1, EN 13108-2, EN 13108-3, EN 13108-4, EN 13108-5, EN 13108-6, EN 13108-7, EN 13108-9, and prEN 13108-31. The approach taken for these PCR may be considered applicable and adaptable for other bitumen based products.This document defines the parameters to be reported, what EPD types (and life cycle stages) to be covered, what rules to be followed in order to generate Life Cycle Inventories (LCI) and conduct Life Cycle Impact Assessment (LCIA) and the data quality to be used in the development of EPDs.In addition to the common parts of EN 15804, this document for bituminous materials:- defines the system boundaries;- defines the modelling and assessment of material-specific characteristics;- defines allocation procedures for multi-output processes along the production chain;- includes the rules for calculating the LCI and the LCIA underlying the EPD;- provides guidance for the determination of the reference service life (RSL);- gives guidance on the establishment of default scenarios.Principles used:- PCR covering bituminous materials;- from cradle to beyond the building life cycle based on EN 15804;- polluter pays: processes of waste processing shall be assigned to the product system that generates the waste until the end-of-waste state is reached;- EPD will be based on declared units (e.g. tonnes of material) and not functional units (e.g. km of road);- abiotic depletion potential of aggregate should be declared when relevant;- all use of inert material in the quarry: reclamation, sound and dust protection have to be included in stages A1 to A3 of the EPD;- data quality will be described (e.g. Average yearly value, average 10 years value, or maximum value ever encountered).NOTE The Use stage, Informative Module B, depends on the use scenario and this depends on the type of road it is used for, the width of the road, the width of the lane, the total pavement structure and substrate for which the pavement layer it is used, the climate conditions, the maximum and minimum pavement temperatures, the traffic intensity and the number of weights of the axle loadings, etc. The use scenario details are determined by the buyer / user of the bituminous mixture. Therefore, only examples on typical maintenance scenarios are given.This guideline provides PCRs that can be applied for a particular asphalt mixture, from a specific asphalt plant with a specific production temperature. Hence, the design of the asphalt mixture is necessary to produce the specific EPD.