Comparison of flexural strength and crack propagation test characteristics of SMA mixtures including the ageing impact

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F17%3A00312527" target="_blank" >RIV/68407700:21110/17:00312527 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Comparison of flexural strength and crack propagation test characteristics of SMA mixtures including the ageing impact

Original language description

Low temperatures decrease the ability of an asphalt mixture to relax after repeated traffic loading and therefore the probability of cracking is increased and becomes even more critical with ageing. In order to prevent cracking appropriate mix design with suitable aggregates and high quality bituminous binders are the prerequisites. Additionally, it is always important to study and understand the performance behaviour, which in this case is related mainly to temperatures below 0°C. For such assessment several test methods are presently available. This research compares two different destructive methods of asphalt testing in low temperature range with focus on flexural strength (three-point bending beam test) and crack propagation test. Three-point bending beam test according to the Czech technical specifications TP151 was performed on un-notched beams. In addition, half of the test specimens was tested after artificial laboratory long-term ageing according to pr EN 12697–52 (5 days at 85°C). The load-deformation diagram was used to calculate the fracture energy. At the same time SCB test according to EN 12697-44 was performed on notched semi-cylindrical test specimens. For some of the tested mixtures the same laboratory long-term ageing protocol was used and aged test specimens were tested again for the same crack propagation test. In both cases ageing index was defined and gained values for particular SMA mixtures compared.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20102 - Construction engineering, Municipal and structural engineering

Project

<a href="/en/project/TA04031328" target="_blank" >TA04031328: Recycling of stone mastic asphalts and development of special celullose fibres for this type of asphalt mixtures</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Bearing Capacity of Roads, Railways and Airfields

ISBN

978-1-138-29595-7

ISSN

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e-ISSN

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Number of pages

8

Pages from-to

185-192

Publisher name

Taylor & Francis Group

Place of publication

Londýn

Event location

Atény

Event date

Jun 28, 2017

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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