Liikennevirasto

Toimialayhteisö: Liikennevirasto
Komitea: CEN/TC 341 (Geotechnical Investigation and Testing)
Alkuperä: CEN
Määräpäivä: 2017-11-17
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Toimialayhteisö: Liikennevirasto
Komitea: ISO/TC 182 (Geotechnics)
Alkuperä: ISO
Määräpäivä: 2017-11-17
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This international standard specifies a method for unconsolidated undrained triaxial compression tests. This international standard is applicable to the laboratory determination of undrained triaxial shear strength under compression loading within the scope of geotechnical investigations. The cylindrical specimen, which may comprise undisturbed, re-compacted, remoulded or reconstituted soil, is subjected to an isotropic stress under undrained conditions and thereafter is sheared under undrained conditions. The test allows the determination of shear strength and stress-strain relationships in terms of total stresses. Non-standard procedures such as tests with the measurement of pore pressure or tests with filter drains are not covered in this document.
Toimialayhteisö: Liikennevirasto
Komitea: CEN/TC 227 (Road materials)
Alkuperä: CEN
Määräpäivä: 2017-11-19
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This draft European Standard specifies methods of moulding specimens from bituminous mixtures by impact compaction. Such specimens are primarily used to determine bulk density and other technological characteristics e.g. Marshall stability and flow according to EN 12697-34.This draft European Standard applies to bituminous mixtures (both those made up in a laboratory and those resulting from work site sampling), with not more than 15 % by mass retained on the 22,4 mm sieve and none on the 31,5 mm sieve.
Toimialayhteisö: Liikennevirasto
Komitea: CEN/TC 227 (Road materials)
Alkuperä: CEN
Määräpäivä: 2017-11-19
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This draft European Standard specifies the Semi-Circular Bending (SCB) test method to determine the tensile strength or fracture toughness of an asphalt mixture for the assessment of the potential for crack propagation. The results of the test can be used to calculate:- the maximum load that the material containing a notch (crack) can resist before failure;- when the presence of a notch is critical.It should be noted that the test only describes a method to determine the resistance to crack propagation of an asphalt mixture. The crack propagation phase describes the second part of failure mechanism during dynamic loading. The first phase, which is the crack initiation phase, is mainly covered by the fatigue test (EN 12697-24).
Toimialayhteisö: Liikennevirasto
Komitea: CEN/TC 227 (Road materials)
Alkuperä: CEN
Määräpäivä: 2017-11-19
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This draft European Standard specifies test methods for determining the maximum density of a bituminous mixture (voidless mass). It specifies a volumetric procedure, a hydrostatic procedure and a mathematical procedure.The test methods described are intended for use with loose bituminous materials containing paving grade bitumens, modified binders or other bituminous binders used for hot mix asphalt. The tests are suitable for both fresh or aged bituminous materials.Samples may be supplied as loose material or as compacted material; the latter should be separated first.NOTE General guidance on selection of a test procedure to determine the maximum density of a bituminous mixture is given in Annex A.
Toimialayhteisö: Liikennevirasto
Komitea: CEN/TC 227 (Road materials)
Alkuperä: CEN
Määräpäivä: 2017-11-19
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This document describes a test method for the recovery of soluble bitumen from bituminous mixtures used in road, airfield or similar pavements in a form suitable for further testing. The test can be undertaken on either loose or compacted asphalt materials. The procedure is suitable for the recovery of paving grade bitumens, for which materials this European Standard is the reference method. The fractionating column procedure (see EN 12697-4) is the reference method for mixtures containing volatile matter such as cut-back bitumen.For recovery of polymer modified bitumens, the rotary evaporator procedure is recommended.
Toimialayhteisö: Liikennevirasto
Komitea: ISO/TC 182 (Geotechnics)
Alkuperä: ISO
Määräpäivä: 2017-12-01
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This international standard specifies a method for consolidated triaxial compression tests on water-saturated soils. This international standard is applicable to the laboratory determination of triaxial shear strength under compression loading within the scope of geotechnical investigations. The cylindrical specimen, which may comprise undisturbed, re-compacted, remoulded or reconstituted soil, is subjected to an isotropic or an anisotropic stress under drained conditions and thereafter is sheared under undrained or drained conditions. The test allows the determination of shear strength, stress-strain relationships and effective stress paths. All stresses and strains are denoted as positive numerical values in compression. Special procedures such as: are not fully covered in this standard procedure. However, these specific tests may refer to general procedures described in this standard.
Toimialayhteisö: Liikennevirasto
Komitea: CEN/TC 340 (Anti-seismic devices)
Alkuperä: CEN
Määräpäivä: 2017-12-15
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This European Standard covers the design of devices that are provided in structures, with the aim of modifying their response to the seismic action. It specifies functional requirements and general design rules of the devices for the seismic and non-seismic design situations, material characteristics, manufacturing and testing requirements, as well as assessment and verification of constancy of performance, installation and maintenance requirements. This European Standard covers the types of devices and combinations thereof as defined in 3.4.NOTE Additional information concerning the scope of this European Standard is given in Annex A.
Toimialayhteisö: Liikennevirasto
Komitea: CEN/TC 226 (Road equipment)
Alkuperä: CEN
Määräpäivä: 2018-01-15
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This document specifies performance test procedures to determine the passive safety properties of support structures such as lighting columns, sign posts, structural elements, foundations, detachable products and any other components used to support a particular item of equipment on the roadside.This document provides a common basis for the vehicle impact testing of items of road equipment support structures.This document does not apply to road restraint systems.
Toimialayhteisö: Liikennevirasto
Komitea: CEN/TC 227 (Road materials)
Alkuperä: CEN
Määräpäivä: 2018-01-15
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This European Standard specifies a procedure for the determination of the particle size distribution of the aggregates of bituminous mixtures by sieving. The test is applicable to aggregates recovered after binder extraction in accordance with EN 12697-1 or EN 12697-39.The applicability of this European Standard is described in the product standards for bituminous mixtures.NOTE Fibres, solid (non-soluble during extraction) additives and (some) binder modifiers influence the test result.