ISSN:
1551-2916
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
The general approach to equivalent circuit modeling of cement pastes has been to interpret spectra obtained from ac impedance measurements, assigning electrical responses to microstructural features such as hydration products and fluid-filled porosity. In this paper, we take an alternative approach. Starting with a consideration of paste microstructures and the potential conduction pathways that such microstructures could support, we propose an equivalent circuit model. Ac impedance data from pore-reduced cements have been measured for the first time and are used to test the model. This approach has permitted estimation of conductivities of in situ pore fluid, which we believe to be influenced by hydrogen bonding to varying extents depending on pore size, and hydration product. Preliminary results are in broad agreement with data obtained by alternative methods.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1151-2916.1997.tb03206.x
