Evaluation of crack width of continuously reinforced concrete pavement based on extension method
Xiao Qiu-ming · Journal of Railway Science and Engineering · 2006
The paper is based on the introduction of the basic principles and the evaluating steps about the extension method.According to the testing results of crack width in 3 highway sections of Leiyi Expressway in Hunan section of Jingzhu Expressway,the evaluation of CRCP crack width is studied with the extension method and the evaluating steps are determined.The evaluating results of extension method are compared to those of statistical method.Thus,a new method is put forward to evaluate the CRCP crack width with the extension method.The results show that the extension method not only evaluates reasonably the present conditions of crack width,but also its relevance degree can reflect the dynamic development trend of the grade of CRCP crack width.However,the evaluating results of statistical method are the static results reflecting the present conditions of CRCP crack width,and influenced remarkably by the individual wider cracks.Therefore,the extension method is more reliable and accurate than the statistical method,and it can satisty the request of CRCP testing more.It provids an important reference basis for the CRCP maintenance.