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Geogrid Stabilisation in asphalt paved roads

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Geogrid Stabilisation in asphalt paved roads

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Samenvatting

The use of TriAx geogrids to stabilise the granular base layer of asphalt paved roads, is ever increasing. However, the effect a stabilising geogrid has on the entire pavement structure is still derived from a foundation reduction factor, instead of being calculated directly. Practical experience showed that this can lead to inaccurate or conservative designs.
The goal of this study is to create a new mechanistic-empirical calculation method, based on the modulus improvement factor of geogrid stabilised granular base layers in asphalt paved roads. Additionally, this calculation method must be able to determine the influence of the type of geogrid, the foundation thickness and the subgrade stiffness. Hereto the following research question has been posed: “What is the Modulus Improvement Factor of a by TriAx geogrids stabilised granular base layer for Mechanistic-Empirically designed asphalt pavements, in relation to the geogrid type, foundation thickness and subgrade stiffness?”
The calculation method created to answer this question, combines linear elastic calculation software with asphalt strain functions. For calibration, it uses rut formation data acquired from full-scale Heavy Vehicle Simulator tests. The method was applied in a practical case to design several pavement structure variants. A life cycle cost analysis and CO2 emissions estimate were made to compare the variants.
To conclude this study, a detailed recommendation was made for further research, to increase the validity of this study's findings.

Toon meer
OrganisatieHZ University of Applied Sciences
OpleidingCiviele Techniek
AfdelingDomein Technology, Water & Environment
PartnerTensar International B.V., 's-Hertogenbosch
Datum2019-08-27
TypeBachelor
TaalEngels

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