--ISAP Graduate Student Research Directory

Student:

Pengcheng Fu

Investigation of Deep In-Situ Recycling with Foamed Asphalt and Discrete Element Modeling

Abstract

(Key objectives, description of work, expected outcome)

This Ph.D. thesis research is closely related to PPRC (Partnered Pavement Research Center) Strategic Plan Element 4.12: "Development of Improved Mix and Structural Design and Construction Guidelines for Deep In-Situ Recycling (DISR) of Cracked Asphalt Concrete with Foamed Asphalt" of University of California Pavement Research Center.The detailed work plan can be found at:

http://www.its.berkeley.edu/pavementresearch/PDF/PPRC_Work_Plan_4-2-1-Foam_UCPRC-WP-2005-05.pdf

Deep In-Situ Recycling with Foamed Asphalt or Cold Foam In-Place Recycling is a flexible pavement rehabilitation technique being considered for major implementation in California.

The research includes extensive laboratory testing and field monitoring. The laboratory testing will identify the roles of constituents of foamed asphalt mixes and select best laboratory practices and appropriate test methods, both for advanced research and routine project-level tests. Field monitoring, including FWD and other field testing methods on DISR-foamed asphalt projects built in California is being carried out twice a year. Mechanistic sensitivity analysis will also be performed based on typical California engineering practice to investigate the sensitivity of pavement performance to various mix design and structural design factors, and also to identify key properties of the recycled material for different structures.

Discrete element method will be employed to model weakly bonded base materials and to help understand the stabilizing mechanism of foamed asphalt mixes and the behaviors of weakly bonded base materials in the responses of pavement structures.

Starting Date:

Fall, 2004

Expected Completion:

Fall, 2008

University
(or institution)

University of California Pavement Research Center, University of California at Davis, USA

website

Chair, Civil Engineering

John T. Harvey website

e-mail: jtharvey@ucdavis.edu

Student

Pengcheng Fu

e-mail: pfu@ucdavis.edu

Academic Achievements

(Degree, grants, publications, etc.)

Ph. D., Geotechnical Engineering with an emphasis on Pavement Engineering, University of California, Davis.  Degree expected Sep. 2008.  Advisor: Professor John T. Harvey.

Master of Science, Geotechnical Engineering, Tsinghua University, Beijing, China, July 2004.
Advisor: Professor, Jian-Min Zhang.

Bachelor of Science with honor, Civil Engineering, Tsinghua University, Beijing, China, July 2001.

Publications:

Fu P. and Harvey J., 2006. Temperature Sensitivity of Foamed Asphalt Mix Stiffness: Field and Lab Study. To appear in International Journal of Pavement Engineering.

Fu P. and Harvey J., 2006. Strategy Selection for DISR-Foamed Asphalt: Stiffer or More Flexible.
The 10th International Conference on Asphalt Concrete, Quebec, Canada, Aug.12-17, 2006.

Harvey J., Fu P., Jeon E.J. and Ullidtz P., 2006. Granular Base Layer Stiffness Characterization for Analytical Design of Flexible Pavements. The 10th International Conference on Asphalt Concrete, Quebec, Canada, Aug.12-17, 2006.

Permission to post on ISAP website
(Members only)

Yes

Date:

October 08, 2006