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Durability and Performance of Civil Engineering Materials






PhD Defense: Damage Development, Phase Changes, Transport Properties, and Freeze-Thaw Performance of Cementitious Materials Exposed to Chloride Based Salts


Yaghoob Farnam defended his PhD thesis titled "Damage development, phase changes, transport properties, and freeze-thaw performance of cementitious materials exposed to chloride based salts" under the supervision of professor Jason Weiss. Recently, there has been a dramatic increase in premature deterioration in concrete pavements and flat works that are exposed to chloride based salts. Chloride based salts can cause damage and deterioration in concrete due to the combination of factors which include: increased saturation, ice formation, salt crystallization, osmotic pressure, corrosion in steel reinforcement, and/or deleterious chemical reactions. This thesis discusses how chloride based salts interact with cementitious materials to (1) develop damage in concrete, (2) create new chemical phases in concrete, (3) alter transport properties of concrete, and (4) change the concrete freeze-thaw performance. To mitigate the damage and degradation due to the chemical phase transition, three approaches were evaluated: (1) use of a cementitious binder that does not react with salts, (2) use of a new practical technology (phase change material) to melt ice and snow, thereby decreasing the demand for deicing salt usage, and (3) use of sealers.


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Interaction of Chloride-Based Deicing Salts with Concrete.


U.S. infrastructure continues to decay at an alarming rate, as exemplified by the low grades consistently awarded by the ASCE Infrastructure Report Card. While there are many contributors to the decay and degradation of our nation's transportation infrastructure, one that cannot be overlooked in many states is the annual winter application of deicing salts.


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Yaghoob Farnam Receives 2014 J.P. Gleason Fellowship Award!


Yaghoob Farnam, PhD Candidate in the Civil Engineering Materials Group, has been named a recipient of the 2014 PCA Education Foundation J. P. Gleason Fellowship. The support provided by the Education Foundation is used to identify and attract outstanding candidates in the field of the cement and concrete. Yaghoob is one of four students who were selected in 2014 for this prestigious award.


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Road Salt is Worse Than You Think!


We use road salt to melt ice after a snowstorm, but is it bad for the environment?


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Purdue University, Lyles School of Civil Engineering, West Lafayette, IN 47907, USA, Email: yfarnam@purdue.edu, Phone: +1-765-494-2255