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Fatigue properties of large steel bridge deck pavement with epoxy asphalt

Author: ZhangFuJun
Tutor: PengLiang；ZhouJianPu
School: Central South University
Course: Architecture and Civil Engineering
Keywords: Steel Deck Pavement Epoxy asphalt Fatigue properties Trabecular bending test
CLC: U444
Type: Master's thesis
Year: 2010
Downloads: 102
Quote: 0
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Abstract


This article is based on the finite element analysis of the force of the large steel bridge deck pavement , draw the pavement of the maximum tensile stress ( tensile strain ) appear in the conclusions of the surface of the pavement layer . The maximum transverse tensile stress of the pavement near the diaphragm trapezoidal stiffening ribs rib top and mediastinal board top area , the maximum longitudinal tensile stress occurs at the top of the diaphragm , easy vertical and horizontal cracks near the diaphragm , mediastinal board is easy to produce at the top of the vertical cracks . Epoxy asphalt binder has its particularity , this article by pull-out test , viscosity test and UV aging tests to determine the anti-aging properties of epoxy asphalt , to provide support for the fatigue properties of the epoxy mixture . View of the particularity of the epoxy asphalt through the test compared stress control and strain control in two ways trabecular bending fatigue test , fatigue test fixture design a suitable epoxy asphalt mixture fatigue performance testing , analysis of the two control methods accuracy , and put forward feasible suggestions based on the backcourt laboratory testing and pavement detection . Combined with the fatigue properties of the mixture , according to the steel deck pavement destruction manifestations epoxy asphalt fatigue damage mechanism analysis to find the impact of epoxy asphalt mixture resistance to water damage the performance of several key influencing factors - the gap rate , paving the waiting time , epoxy resin dosage , the amount of binder , application of asphalt mixture design method , quantitative analysis of these factors . As the porosity increases , the fatigue properties of the epoxy asphalt in reducing the porosity of 3%, the longest fatigue life ; 60min the paver waiting time fatigue life ; Test compound A and B in combination with an epoxy bitumen the amounts of the components when the ratio of 1:5.2 highest fatigue life ; With the increase of fuel consumption , the increased number of epoxy asphalt absolute fatigue , epoxy asphalt binder material content of 6.5% , the fatigue life .

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CLC: > Transportation > Road transport > Bridges and Culverts > Bridge materials
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