acbm

CEAT hosts Visiting Lecturers: Dr. Chung and Dr. Rangaraju

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Dr. Deborah D.L. Chung

from the University of Buffalo, State University of New York, was a visiting lecturer for CEAT and ACBM faculty and students on November 18, 2005 at the Department of Civil and Environmental Engineer at UIUC. The topic of her presentation was Multifunctional Cement-Based Materials. Professor Chung was also giving a piano performance the same evening on campus at the University of Illinois.

Dr. Chung is Niagara Mohawk Endowed Chair Professor in University at Buffalo, State University of New York. Born and raised in Hong Kong, she received her Ph.D. degree in Materials Science from Massachusetts Institute of Technology and her B.S. degree from California Institute of Technology. She is Fellow of American Carbon Society and ASM International. She is the first person of Chinese descent to receive the Pettinos Award, an international award to recognize outstanding research accomplishments in carbon science and technology. She is also the recipient of the Teacher of the Year Award from Tau Beta Pi. Her publications include over 400 journal papers and 6 books, which include Composite Materials and Multifunctional Cement-Based Materials. In addition, Dr. Chung is a musician, holding a diploma in piano performance from Royal Schools of Music, UK.

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Professor Chung’s areas of research include: Materials science and engineering, particularly smart materials, concrete, battery electrode materials, carbon fibers and filaments, composites processing and interfaces, metal-matrix composites, electronic packaging materials, and activated carbon. Her presentation was on multifunctional cement-based materials that provide non-structural functions while retaining good structural properties have been developed without the use of embedded or attached devices. The non-structural functions attained include (i) the sensing of strain, stress, damage and temperature, as needed for traffic monitoring, structural health monitoring, building facility management, homeland security, vibration control and thermal regulation, (ii) electromagnetic interference shielding, as needed for cell-phone proof buildings and for deterring electromagnetic forms of spying, and (iii) resistance heating, as needed for deicing, freeze-thaw durability improvement and floor heating.

prasad rangaraju

Dr. Prasad Rangaraju

is an Assistant Professor at Clemson University in the Department of Civil Engineering. He was a visiting lecturer for CEAT faculty and students on November 28, 2005 at the Department of CEE at UIUC. The title of his presentation was Potential for Development of Alkali-Silica Reaction in the Presence of Airfield Deicing Chemicals.

Dr. Rangaraju’s presentation focused on some preliminary studies conducted to investigate the role of alkali-based airfield deicers in causing alkali-silica reaction (ASR) in airfield pavement concrete. A modified ASTM C 1260 test procedure was used in this study, in which mortar bars prepared with reactive aggregate were immersed in deicer soak solution instead of 1 N sodium hydroxide solution. In addition, standard ASTM C 1260 tests were also conducted on mortar bar containing reactive aggregate. Expansion of mortar bars subjected to deicer solutions in the modified ASTM C 1260 test was either equivalent or significantly greater than expansion of mortar bars exposed to the 1 N sodium hydroxide soak solution in the standard test. Based on the findings from this study, it appears that the alkali-based airfield deicers have considerable potential in initiating and accelerating ASR. In parallel studies with a non-reactive aggregate, no significant expansions were observed either in the standard or the modified ASTM C 1260 test.

Professor Rangaraju’s areas of research interests include; cement, concrete, aggregates and supplementary materials, microscopy and petrography of cement based composites, aggregates, durability of cementitious systems, and concrete pavements. He received his Ph.D. in Civil Engineering in 1997 from Purdue University. He is a member of the America Society of Civil Engineers, American Concrete Institute, American Society of Testing Materials and Transportation Research Board. Prasad is also a registered Professional Engineer in Minnesota.