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Experiment and Analysis of Antierosion Performance of Semirigid Base Surface
Free water accumulated between pavement surface and base can flow at high speed due to differential pressure, thereby producing a pumping effect. This condition may scour the base surface, causing damage to the road surface. On the basis of the principles of scouring of a semirigid base material, vibrating water flow erosion and wheel rolling scouring tests were conducted using a concrete shaking table and an asphalt mixture rutting tester to evaluate the antierosion performance and antiscouring effect of a semirigid base. According to the comparison results of the two types of base materials and three antierosion measures, the erosion resistance of cement stabilized graded gravel is superior to that of cement stabilized grit. Using emulsification asphalt penetration treatment and earthwork cloth produces a significant effect on reducing the surface erosion of a semirigid base material. The scouring mass of the base material can usually be reduced by 60%–80% or more, in one case up to 94.4%. With regard to the antierosion effect, “emulsified asphalt permeation cloth” is the most superior solution of the three, followed by earthwork cloth reinforcement, and then “emulsified asphalt permeation treatment” utilization. In comparison with the non-freeze-thawed specimens, the scouring mass of the freeze-thawed specimens increases slightly. The effect of the antierosion measures remains promising under the conditions of freeze-thaw cycles. For the cement concrete pavement, applying simulated dowel bars in contraction joints reduces erosion by 40.7%–66.3%. Results show that the scouring mass of the base material in the vibration flow scouring test is larger than that of the wheel rolling scouring test, while the overall trend remains constant. For nonquantitative analysis of semirigid base materials, either one of the two erosion test methods can be utilized to analyze and compare the erosion resistance and antierosion effect of the base material.
Experiment and Analysis of Antierosion Performance of Semirigid Base Surface
Free water accumulated between pavement surface and base can flow at high speed due to differential pressure, thereby producing a pumping effect. This condition may scour the base surface, causing damage to the road surface. On the basis of the principles of scouring of a semirigid base material, vibrating water flow erosion and wheel rolling scouring tests were conducted using a concrete shaking table and an asphalt mixture rutting tester to evaluate the antierosion performance and antiscouring effect of a semirigid base. According to the comparison results of the two types of base materials and three antierosion measures, the erosion resistance of cement stabilized graded gravel is superior to that of cement stabilized grit. Using emulsification asphalt penetration treatment and earthwork cloth produces a significant effect on reducing the surface erosion of a semirigid base material. The scouring mass of the base material can usually be reduced by 60%–80% or more, in one case up to 94.4%. With regard to the antierosion effect, “emulsified asphalt permeation cloth” is the most superior solution of the three, followed by earthwork cloth reinforcement, and then “emulsified asphalt permeation treatment” utilization. In comparison with the non-freeze-thawed specimens, the scouring mass of the freeze-thawed specimens increases slightly. The effect of the antierosion measures remains promising under the conditions of freeze-thaw cycles. For the cement concrete pavement, applying simulated dowel bars in contraction joints reduces erosion by 40.7%–66.3%. Results show that the scouring mass of the base material in the vibration flow scouring test is larger than that of the wheel rolling scouring test, while the overall trend remains constant. For nonquantitative analysis of semirigid base materials, either one of the two erosion test methods can be utilized to analyze and compare the erosion resistance and antierosion effect of the base material.
Experiment and Analysis of Antierosion Performance of Semirigid Base Surface
Gao, Wei (author) / Cui, Wei (author) / Li, Xiu-feng (author)
2018-12-01
82019-01-01 pages
Article (Journal)
Electronic Resource
Unknown
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