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Visar resultat 1 - 5 av 45 avhandlingar som matchar ovanstående sökkriterier.
1. Influence of aggregates on permanent deformation of asphalt
Sammanfattning : One of the most common failure modes for asphalt pavements is the occurrence of permanent deformation on the wheel path. This leads to not only other distresses, such as potholes and stripping, but also decreases substantially road safety and increases maintenance costs. LÄS MER
2. Analyses of Resilient Behavior of Unbound Materials for the Purpose of Predicting Permanent Deformation Behavior
Sammanfattning : Post compaction is the unintended compaction of the unbound material that commences immediately after a road is brought into service and caused by densification of the material. Analogies to this post compaction can also be seen in laboratory and field tests. LÄS MER
3. Mechanistic-Empirical Modeling of Permanent Deformation in Asphalt Concrete Layers
Sammanfattning : Three mechanistic-empirical permanent deformation models were evaluated under Swedish conditions with respect to traffic, climate and materials using accelerated pavement testing and long-term pavement performance studies. The mechanistic-empirical pavement design guide (M E PDG), the incremental-recursive mechanistic-empirical CalME model (CalME), and the PErmanent Deformation of asphalt concrete layer for ROads (PEDRO) model generally showed both useful features and limitations. LÄS MER
4. Torque and Angle Controlled Tightening of Bolted Joints
Sammanfattning : Reduced weight and fuel consumption, improved reliability and engine performance are the main requirements in the automotive industry of today. These requirements demand robust and optimized bolted joints, where a high amount of preload obtained by effective utilisation of the bolt is essential. LÄS MER
5. Analysis of Response and Development of Permanent Deformation of Unbound Granular Materials Using a Testing Box Technique
Sammanfattning : The main objective of this thesis is to study the response and development of permanent deformation in unbound granular materials, theoretically and experimentally. A testing box technique is used here to more closely simulate the behaviour of unbound aggregates subjected to external vertical loading. LÄS MER