@article{ghasemzadeh_rashetnia_smyl_pour-ghaz_2016, title={A comparison of methods to evaluate mass transport in damaged mortar}, volume={70}, ISSN={["1873-393X"]}, DOI={10.1016/j.cemconcomp.2016.03.007}, abstractNote={The service life of reinforced concrete (RC) structures is directly influenced by the transport properties of concrete. These transport properties are adversely affected by the presence of cracks. Therefore, for accurate service life estimation of RC structures the effect of cracks on mass transport needs to be understood and quantified. To quantify the effect of cracks, different measurement methods have been developed. In this paper, we compare different mass transport measurement methods for quantifying the effect of damage, and investigate which method is more sensitive and provides the most information on the effect of damage. In this work, damage was induced by freeze-thaw in mortar specimens. Mass transport properties were measured using electrical resistivity, rapid chloride permeability, sorptivity, drying, air permeability, water permeability, and desorption isotherm. The results indicate that the measured effect of damage depends on the mechanisms of transport used in the measurement technique, and therefore, different measurement techniques do not necessarily provide the same measure of the effect of damage. The water and air permeability are comparatively more sensitive to the presence of damage.}, journal={CEMENT & CONCRETE COMPOSITES}, author={Ghasemzadeh, Farnam and Rashetnia, Reza and Smyl, Danny and Pour-Ghaz, Mohammad}, year={2016}, month={Jul}, pages={119–129} } @article{ghasemzadeh_pour-ghaz_2015, title={Effect of Damage on Moisture Transport in Concrete}, volume={27}, ISSN={["1943-5533"]}, DOI={10.1061/(asce)mt.1943-5533.0001211}, abstractNote={AbstractThis paper presents the results of an experimental and analytical study on the effect of distributed cracks (damage) on moisture transport in concrete. Specifically, the writers investigate the following: (1) how damage affects the saturated and unsaturated transport and electrical resistivity, (2) whether one-dimensional (1D) analysis based on the sharp front (SF) theory can explain the relation between the saturated and unsaturated transport in damaged concrete, and (3) which transport mechanism is more sensitive to damage. Conceptual models are developed based on damage mechanics and fluid transport to explain the experimental data. Material constants are also provided for numerical modeling of unsaturated transport in damaged concrete. The results show that damage differently affects each of the transport mechanisms, and saturated hydraulic conductivity is more sensitive to damage as compared to sorptivity and electrical resistivity. The simplified 1D analysis, based on the sharp front theory,...}, number={9}, journal={JOURNAL OF MATERIALS IN CIVIL ENGINEERING}, author={Ghasemzadeh, Farnam and Pour-Ghaz, Mohammad}, year={2015}, month={Sep} } @article{ghasemzadeh_sajedi_shekarchi_layssi_hallaji_2014, title={Performance evaluation of different repair concretes proposed for an existing deteriorated jetty structure}, volume={28}, number={4}, journal={Journal of Performance of Constructed Facilities}, author={Ghasemzadeh, F. and Sajedi, S. and Shekarchi, M. and Layssi, H. and Hallaji, M.}, year={2014} }