TY - JOUR
T1 - Transient moisture profiles in cover-zone concrete during water absorption
AU - McCarter, William John
AU - Alaswad, Gasim Ayad
AU - Suryanto, Benny
PY - 2018/6
Y1 - 2018/6
N2 - A number of sophisticated techniques, such as NMR imaging and -ray attenuation, have now been used to study moisture transport in porous construction materials. This paper presents initial developments in the application of discretized, electrical conductivity measurements as a relatively simple technique to monitor water movement within cover-zone concrete. Using a 3-phase model and the Archie relationship for porous rock formations, conductivity measurements are used to evaluate moisture-content profiles during water ingress and, through the use of Boltzmann's transformation, it is shown that these profiles collapse onto a master-curve. Having obtained the master-curve during absorption, the capillary transport coefficient (D) can then be obtained; however, the current work focuses on presenting the methodology as an alternative testing technique.
AB - A number of sophisticated techniques, such as NMR imaging and -ray attenuation, have now been used to study moisture transport in porous construction materials. This paper presents initial developments in the application of discretized, electrical conductivity measurements as a relatively simple technique to monitor water movement within cover-zone concrete. Using a 3-phase model and the Archie relationship for porous rock formations, conductivity measurements are used to evaluate moisture-content profiles during water ingress and, through the use of Boltzmann's transformation, it is shown that these profiles collapse onto a master-curve. Having obtained the master-curve during absorption, the capillary transport coefficient (D) can then be obtained; however, the current work focuses on presenting the methodology as an alternative testing technique.
U2 - 10.1016/j.cemconres.2018.04.001
DO - 10.1016/j.cemconres.2018.04.001
M3 - Article
SN - 0008-8846
VL - 108
SP - 167
EP - 171
JO - Cement and Concrete Research
JF - Cement and Concrete Research
ER -