Research on Relationships among Different Disease Types of Cement Concrete Pavement Based on Structural Equation Model

Abstract

In order to determine the key content of preventive maintenance of the cement concrete pavement in military airports in the seasonal frozen area, the relationship among pavement diseases is analyzed in this paper, and the degree of impact of each disease on pavement damage is quantified. Based on the survey data of 36 sample airports in 12 provinces, such as Hebei, Shandong, and Liaoning, a questionnaire covering many disease variables affecting pavement damage was designed. The exploratory factor analysis method and structural equation model (SEM) were used to analyze the interaction among joint disease, surface disease, vertical disease, repair disease, and fracture disease. And the influence degree of each disease on pavement damage was quantified as well. The research results show that the questionnaire has good reliability and validity and is suitable for confirmatory factor analysis. The SEM fits well with the observed data and meets the adaptation standard. Joint disease, surface disease, and vertical disease all have significant positive direct impact on pavement damage. Moreover, joint disease and surface disease can also indirectly affect pavement damage. The effects of surface disease (0.327), vertical disease (0.283), and joint disease (0.219) on pavement damage decrease in turn. Surface diseases have the greatest impact on pavement damage, which are the critical diseases to accelerate the pavement damage. By strengthening the prevention and control of surface diseases and delaying the conversion process of other diseases to surface diseases, the service life of the pavement can be greatly improved, and the maintenance cost can be reduced.

Coping with Knowledge Inertia for Improving R&D Team Creativity by Using Structural Equation Modeling and Hierarchical Multiple Regression

“…In order to test the direct and mediating hypotheses developed previously relating to the relationship of knowledge inertia, intentional unlearning capability, team cognitive conflict, and team creativity, followed by Heredia-Rojas et al [47] and Melovi et al [48], the theoretical structural equation modeling (SEM) is proposed in Figure 2 with exogenous variables (i.e., intentional unlearning capability) represented by ellipse named ξ, endogenous variables (i.e., team creativity) represented by an ellipse named η, observed variables (i.e., items) represented by a rectangle named X and Y, while δ, ε, ω, and ζ represented an error value, λ x and λ y represented a factor loading value, and c and β represented the path coefficient. Followed by Chen and Wang [49], the theoretical SEM model can be descripted as in Note: N � 135. * * p < 0.01; * p < 0.05.…”

Temperature Correction for FWD Deflection in Cement Pavement Void Detection

“…Cement concrete pavement structures have advantages of extended service life, strong load diffusion capacity, easy constructability, accessibility of constituent materials, and low cost, and they are widely used for all types of highways [1]. However, during the service life of cement pavement, the pavement is prone to experience cracks, disconnections, voids, and other problems, owing to the combined action of the driving load and external environment.…”

Evaluation and Formulation of Assessment Criteria for Dominant Distresses in Preventive Maintenance of Cement Concrete Pavements

“…At present, domestic and foreign scholars have performed a lot of research on the judgement standard of preventive maintenance [2][3][4][5][6][7][8]. Based on the types and characteristics of early distresses of asphalt pavement, Li et al proposed the evaluation index system of preventive maintenance of asphalt pavement with the expert scoring method [9].…”