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CVEN 615: Flexible Pavement Structural Design and Analysis

This course prepares the student to use mechanistic-empirical pavement design and analysis. Approximately 40 percent of the course prepares the student to characterize materials used in flexible pavements, which are considered to be pavements with an asphalt surface. Unbound materials such as native subgrade soils and unbound aggregate bases and subbases are characterized to account for their sensitivity to the state of stress under traffic loading as well as geostatic and environmentally induced (temperature and moisture) conditions. The viscoelastic and viscoplastic properties of asphalt bound materials are considered in their characterization so that the transient and permanent strain effects and their impact are considered in the design/analysis approach. The Mechanistic-Empirical Pavement Design Guide (MEPDG) approach now considered to be the state-of-the-art by the American Association of State Highway and Transportation Officials (AASHTO) provides the basic approach for the course. However the MEPDG is liberally supplemented by the texts: Pavement Design and Analysis by Huang and Pavement Design and Materials by Papagiannakis and Masad. These texts provide the necessary background for supporting lectures in in-situ materials characterization using non-destructive techniques, traffic analysis, and structural models of the pavement system (i.e., layered elastic and layered viscoelastic pavement models).

 

CVEN 614: Chemical Stabilization of Soils and Aggregates

CVEN 614 supplies the student with the technology to improve the performance of native soils and aggregate layers in pavement structures, in building foundations, or in embankments through chemical stabilization using a range of stabilizers including calcium oxide or hydroxide (lime), Portland cement, coal combustion by-products, ionic stabilizers, polymers, and asphalt (liquid and foamed). The coarse focuses on a fundamental understanding of the mechanism of stabilization with each stabilizer for each type of soil (clay, silt, sand or gravel) and based on the mineralogical composition of the soil. Based on an understanding of the soil-stabilizer interaction, engineering properties of the stabilized systems are discussed as well as how these properties should be integrated into design methods such as the Mechanistic-Empirical Pavement Design Guide (MEPDG) and in geotechnical applications. The texts for the course include four on-line recommended practice standards for soil and aggregate stabilization prepared for the National Cooperative Highway Research Program by Professor Little. The recommended practices address soils and aggregates of all types, including soils with high sulfate contents. The course is supplemented by pertinent, state-of-the-science/art publications contained on the course website.

 

CVEN 306: Materials Engineering for Civil Engineers

This course introduces the scientific concepts that define materials used in civil engineering (ceramics, metals, polymers, and composites). These concepts include the relationship between macroscopic and macroscopic material properties, physical and mechanical properties, fracture and fatigue damage processes, and chemical degradation and corrosion processes.  The course begins with the development of an understanding of the role that molecular architecture of the materialís unit structure plays in its overall performance. Basic concepts emphasize the role of free energy on the stability of the unit cell and the impact of the free energy concept on the formation of imperfections (point, linear and grain boundaries) and how they impact the materialís performance. The concept of the thermodynamic based phase diagram and its application toward understanding the performance of civil engineering metallic and ceramic materials is presented with emphasis on application toward understanding and improving the performance of civil engineering materials.

 

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