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Yuan W.,Changan University | Wang X.,Chinese First Institute Ltd Corporation of Highway Survey and Design
Applied Mechanics and Materials | Year: 2011

Through the experimental analysis on performance of the water permeability and conservation and the shear resistance of graded gravel base, the influencing factors and changing rules, as well as the internal relations of the drainage ability and structural performance are found out; the key factor for balancing the contradiction lies in the scope and content of the fine aggregates of graded gravel. Provided that other constraint conditions are met during the gradation design, good water permeability and conservation performance of graded gravel permeable base shall be guaranteed as long as the content of the fine aggregates of graded gravel could be controlled within a reasonable scope, meanwhile, the mechanical stability could also be ensured. The paper provides the method for determining the content scope of fine aggregates of graded gravel, and references for the design of graded gravel permeable base of the porous pavement. © (2011) Trans Tech Publications. Source


Zhang H.,Changan University | Wang X.,Chinese First Institute Ltd Corporation of Highway Survey and Design | Hao P.,Changan University
Applied Mechanics and Materials | Year: 2012

Using ordinary material, calculating through the external addition method and then adjusting through experimental tests, the mixing proportion of cement mortar is determined. The testing results show that: when the water cement ratio is 0.50, the fly ash content is too large and the strength of cement mortar will sharply decrease with the increase of its content. Therefore, the fly ash content in engineering cannot exceed 30% of the gelled material. © (2012) Trans Tech Publications. Source


Wang X.,Zhejiang University of Science and Technology | Wang X.,Chinese First Institute Ltd Corporation of Highway Survey and Design | Yang Y.,Zhejiang University of Science and Technology
Advanced Science Letters | Year: 2013

According to the characteristics of tunnels in mainland China, we researched and developed the warmed mix and composite flame retardant, and made the new type of WMFRAM (warmed mix flame retardant asphalt mixture). To study its AFC (anti-flame capability), we conducted a series of indoor burning experiments and field paving on the tested roads. It shows that AFC of the new type of WMFRAM is quite good, and its performance indexes in all aspects meet the previously designed requirements. This new type mixture has a rosy market and a large appliance space. © 2013 American Scientific Publishers All rights reserved. Source


Zhao H.,Changan University | Zhao H.,Chinese First Institute Ltd Corporation of Highway Survey and Design | Wang X.S.,Zhejiang Sci-Tech University | Lu H.Q.,Shanxi Expressway Group | Lu X.L.,Chinese First Institute Ltd Corporation of Highway Survey and Design
Applied Mechanics and Materials | Year: 2013

As a new material, the warm mix asphalt retardant asphalt mixture has its particularity in material design, construction proportion, mixture preparation and on-site paving. This paper summarized the construction process and site construction quality inspection requirement of the warm mix asphalt retardant asphalt mixture through tracking research on-site based on the real engineering. It was shown that the road environment quality of using warm mix retardant asphalt was significantly better than normal hot mix asphalt, asphalt smoke, benzene soluble and Benzopyrene decreased 91.47%, 97.05% and 80.11% respectively. Warm mix asphalt retardant asphalt mixture had a low mixing and compaction temperature. When used in the tunnel pavement, it could not only greatly reduce harmful gas emissions in the process of construction, improve construction environment in tunnel, improve the air transparency in tunnel, be convenient for construction quality management, but also can improve the fire resilience of the tunnel pavement after be put into operation. It had broad application prospect in the tunnel pavement. © (2013) Trans Tech Publications, Switzerland. Source


Wang X.,Chinese First Institute Ltd Corporation of Highway Survey and Design | Li G.,Chinese First Institute Ltd Corporation of Highway Survey and Design
2011 International Conference on Electric Technology and Civil Engineering, ICETCE 2011 - Proceedings | Year: 2011

According to the nonlinear characteristic of graded gravel resilient modulus, Based on the optimization of the three kinds of graded gravel as the research object, and combined with repeated dynamic triaxial test data, compared k model and Uzan model, using statistical analysis software 1stopt carries on the experimental parameters of nonlinear regression, obtained the correlative coefficient of three graded gravel resilient modulus, which is under the two models. Experimental results show that: Uzan model can more accurately reflects the nonlinear deformation behavior of graded gravel resilient, so the reliability of the regression modulus prediction equation for graded gravel is higher, can be used to forecast China's Graded Aggregate Base modulus. © 2011 IEEE. Source

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