dc.contributor.author | Asiimwe, Arnold | |
dc.contributor.author | Bayuule, Brian Gilbert | |
dc.date.accessioned | 2022-11-21T06:18:21Z | |
dc.date.available | 2022-11-21T06:18:21Z | |
dc.date.issued | 2022-11-18 | |
dc.identifier.citation | Asiimwe, Arnold and Bayuule, Brian G. (2022). Modelling the Fatigue Cracking caused by super-single and dual-tyred trucks on a flexible pavement.(Unpublished undergraduate dissertation) Makerere University; Kampala, Uganda. | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12281/13589 | |
dc.description | A research report submitted to the College of Engineering Design and Art in partial fulfillment of the requirement for the award of a degree Bachelor of Science Civil Engineering of Makerere University. | en_US |
dc.description.abstract | Roads are the arteries through which the economy pulses, and are pivotal for the development
of any nation. However, increased traffic and heavier vehicles cause much more distress to
roads than ever before. Supersingle tyred trucks are considered more economical than standard
dual tyred trucks though this is coupled with more road damage due to reduced contact area
leading to higher road strains than conventional dual tyres.
This study was carried out to compare the fatigue cracking caused by dual tyred and supersingle
tyred trucks using Kenpave software. This software was used for determining the stresses and
strains on a flexible pavement consisting of four layers (the HMA layer was 60mm thick, base
course was 250mm, sub base of thickness 300mm and the sub grade at the bottom with infinite
thickness). Results were then used in both the Marshall and MEPDG Fatigue Models. These
results include the horizontal strain at the bottom of the bituminous layers (0.913µ for the
supersingle tyred truck and 0.883µ for the dual tyred truck) and the resilient modulus of the
HMA layer (1.964𝑀𝑃𝑎).
The Marshall Method yielded a fatigue life in terms of number of standard axles as 4259 for
supersingle tyred truck and 4852 for dual tyred truck. While the MEPDG Method yielded a
fatigue life in terms of number of standard axles as 9539 for supersingle tyred truck and 10,889
for dual tyred truck.The ratio of the fatigue life in terms of number of standard axles of the
dual tyred truck to the fatigue life in terms of number of standard axles of the supersingle
tyred truck was 1.14 for both the Marshall Method and the MEPDG Model. This showed that
the supersingle tyred truck would cause more fatigue damage to the flexible pavement, which
is consistent with previous studies. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Makerere University | en_US |
dc.subject | Fatigue Cracking | en_US |
dc.subject | Super-single trucks | en_US |
dc.subject | Dual-tyred trucks | en_US |
dc.title | Modelling the Fatigue Cracking caused by super-single and dual-tyred trucks on a flexible pavement | en_US |
dc.type | Thesis | en_US |