Characterization of sulfate diffusion into cement paste by low frequency impedance spectroscopy
Source abstract
Abstract
Abstract In this study, EIS was used to investigate sulfate diffusion process into cement paste. Cement paste samples with w/c ratio of 0.35 and 0.45 were immersed in 10 wt% sodium sulfate solutions for different durations. An equivalent circuit model of cement paste exposed to sulfate attack was proposed, and some relevant parameters of the equivalent circuit were obtained by EIS analysis. The validations of the effectiveness of EIS on investigating the sulfate diffusion have been provided by SEM and XRD analysis. As the results shown, it is sensitive to use EIS to characterize the diffusion process of sulfate ions into cement paste. The relationship between ingress depth of sulfate obtained from EIS analysis and the square root of exposing time is approximately linear.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Concrete and Cement Materials Research · Concrete Corrosion and Durability · Smart Materials for Construction
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (12)
Show source-provided references
1. Corrosion behavior of stainless steel rebars embedded in concrete: an electrochemical impedance spectroscopy study10.1016/j.electacta.2013.11.154 ↗
2. The corrosion resistance of coated steel dowels determined by impedance spectroscopy10.1016/j.cemconres.2007.04.004 ↗
3. The application of electrochemical impedance spectroscopy to determine the long-term effectiveness of corrosion inhibitors for steel in concrete10.1016/S0958-9465(01)00062-2 ↗
4. The use of electrical impedance spectroscopy for monitoring the hydration products of Portland cement mortars with high percentage of pozzolans10.1016/j.cemconres.2013.03.019 ↗
5. Impedance spectroscopy to characterize the pore structure during the hardening process of Portland cement paste10.1016/j.electacta.2005.02.125 ↗
6. Microstructural modifications in Portland cement concrete due to forced ionic migration tests. Study by impedance spectroscopy10.1016/j.cemconres.2008.03.012 ↗
7. AC impedance phenomena in hydrating cement systems: origin of the high frequency arc
8. Coupled chemo-transport-mechanical modeling and simulation of external sulfate attack in mortar10.1016/j.cemconcomp.2013.12.010 ↗
9. Low frequency characteristics of impedance spectroscopy of concrete
10. Equivalent circuit model for AC electrochemical impedance spectroscopy of concrete10.1016/S0008-8846(00)00400-2 ↗
11. Mechanism of expansion of mortars immersed in sodium sulfate solutions10.1016/j.cemconres.2012.10.001 ↗
12. Monitoring of sulphate attack on hardened cement paste studied by synchrotron XRD10.1016/j.solidstatesciences.2015.08.006 ↗