Anleggsvirksomhet

Emner: Veibelegg
Komité: CEN/TC 227 (Road materials)
Opprinnelse:
Sluttdato: 12. okt 2017
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This European Standard describes a procedure for calculating volumetric characteristics of a compacted bituminous specimen: the air voids content (Vm), the voids content in the mineral aggregate filed with binder (VFB) and the voids content in the mineral aggregate filed with binder and additives (VFBad) for the case of mixtures containing additives in their composition. The method is suitable for specimens which are laboratory compacted or specimens cut from the pavement after placement and compacting, either by coring or sawing. These volumetric characteristics can be used as mix design criteria or as parameters for evaluating the mixture after placing and compacting in the road.

Emner: Veibelegg
Komité: CEN/TC 227 (Road materials)
Opprinnelse:
Sluttdato: 12. okt 2017
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This European Standard describes test methods for the preparation of samples for testing hot applied joint sealants for use in joints in roads, airfields and other concrete pavements.

Emner: Veibelegg
Komité: CEN/TC 227 (Road materials)
Opprinnelse:
Sluttdato: 12. okt 2017
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This European Standard specifies the methods for compacting parallelepipedal specimens (slabs) of bituminous mixtures, to be used directly for subsequent testing, or from which test specimens are cut. For a given mass of bituminous mixture, the specimens are prepared either under controlled compaction energy, or until a specified volume and therefore air voids content is obtained. This European Standard describes the following methods of compaction: - pneumatic tyre method; - steel roller method; - steel roller sector method. This European Standard is applicable to bituminous mixtures manufactured in the laboratory or in a mixing plant.

Emner: Veibelegg
Komité: CEN/TC 227 (Road materials)
Opprinnelse:
Sluttdato: 9. nov 2017
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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.
Emner: Veibelegg
Komité: CEN/TC 227 (Road materials)
Opprinnelse:
Sluttdato: 9. nov 2017
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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).
Emner: Veibelegg
Komité: CEN/TC 227 (Road materials)
Opprinnelse:
Sluttdato: 9. nov 2017
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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.
Emner: Veibelegg
Komité: CEN/TC 227 (Road materials)
Opprinnelse:
Sluttdato: 9. nov 2017
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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.