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Medium-grained asphalt rutting resistance of high temperature

Author: HanDongMing
Tutor: ZhouJinChuan
School: Chongqing Jiaotong University
Course: Road and Railway Engineering
Keywords: Rut Prediction Model Dynamic Stability Orthogonal Shear deformation Shear flow
CLC: U416.217
Type: Master's thesis
Year: 2010
Downloads: 111
Quote: 1
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Abstract


Asphalt Pavement Rutting is one of the major diseases , rutted line into reduced driving safety , comfort, and further lead to other road damage, rutting of asphalt mixture was mainly due to the formation of shear flow , and pressure dense deformation permanent deformation of asphalt only a small part . Ring Road Tests showed that permanent deformation of the main components of the surface layer of medium-grained asphalt , so this article only medium-grained asphalt mixture rutting resistance were studied. According to the research needs in the domestic rut instrument based on a number of improvements , so that it can do different temperatures, different wheel pressure , rutting test different driving speeds , and then studied the rut depth, and dynamic stability with temperature , tire pressure , vehicle speed the variation . Rutting tester displacement measuring deformation of the specimen center rut permanent deformation , so this article is derived indoor rubber wheel rutting tester walking to the center of the plate section rut when the corresponding instantaneous velocity Vm ax. Followed by the high temperature stability of asphalt mixture more significant influencing factors analysis to temperature , tire pressure , vehicle speed as high temperature stability of asphalt mixture multi- factors , each of these factors were taken four levels , the choice of L1 6 ( 45 ) orthogonal orthogonal experiment , orthogonal experiment results showed that the level of the factor range of changes , temperature, load, vehicle speed on the dynamic stability and rut depth of the order are : Temperature gt; driving speed gt ; loads. Analysis of influencing factors in the system after the rut , rutting in previous estimates for the study , based on the rutting prediction model is improved , and through laboratory experiments and finite element calculations to determine the basic parameters of the model RUTTING regression results show that rutting prediction model has high accuracy , rut depth and between each factor has a significant linear relationship . As the actual road conditions and laboratory there are some differences and may not accurately reflect the actual pavement permanent deformation conditions . This test measured through the ring road medium-grained asphalt permanent deformation data derived from laboratory rutting prediction model was modified and reference to other literature data , the actual road medium-grained asphalt mixture permanent deformation predicted.

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CLC: > Transportation > Road transport > Road works > Roadbed, pavement engineering > Pavement Engineering > Road : use of the material points > Asphalt Pavement
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