Abstract
The chloride transport resistance of alkali silicate powder activated slag concretes is evaluated. Two different Na2O-to-source material ratios (n) and two SiO2-to-Na2O ratios of the activator (M s) are used on concretes proportioned using two slag contents (300 kg/m3 and 400 kg/m3). Rapid chloride permeability (RCP) and non-steady state migration (NSSM) tests are used to evaluate the chloride transport behavior. Alkali silicate powder activated concretes demonstrate comparable or better chloride transport resistance than OPC concretes when evaluated using RCP and NSSM tests. The relationships between the activator parameter, n·Ms, and the critical pore sizes (dcl) or the RCP and NSSM values demonstrate similar trends showing the influence of dc in determining the ionic transport response. Electrical impedance spectroscopy (EIS) is used to relate the material response before and after the transport tests, and equivalent circuit models are used to extract the parameters that relate to the pore structure. EIS coupled with circuit modeling clearly brings out the differences between the RCP and NSSM test on their influences in the microstructure of alkali activated slag concretes.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 58-68 |
| Number of pages | 11 |
| Journal | Cement and Concrete Composites |
| Volume | 44 |
| DOIs | |
| State | Published - 2013 |
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Keywords
- Alkali activated slag
- Circuit models
- Electrical impedance Pore structure
- Non-steady state migration
- Powder activator
- Rapid chloride permeability
ASJC Scopus subject areas
- Materials Science(all)
- Building and Construction
Cite this
An electrical impedance investigation into the chloride ion transport resistance of alkali silicate powder activated slag concretes. / Ravikumar, Deepak; Neithalath, Narayanan.
In: Cement and Concrete Composites, Vol. 44, 2013, p. 58-68.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - An electrical impedance investigation into the chloride ion transport resistance of alkali silicate powder activated slag concretes
AU - Ravikumar, Deepak
AU - Neithalath, Narayanan
PY - 2013
Y1 - 2013
N2 - The chloride transport resistance of alkali silicate powder activated slag concretes is evaluated. Two different Na2O-to-source material ratios (n) and two SiO2-to-Na2O ratios of the activator (M s) are used on concretes proportioned using two slag contents (300 kg/m3 and 400 kg/m3). Rapid chloride permeability (RCP) and non-steady state migration (NSSM) tests are used to evaluate the chloride transport behavior. Alkali silicate powder activated concretes demonstrate comparable or better chloride transport resistance than OPC concretes when evaluated using RCP and NSSM tests. The relationships between the activator parameter, n·Ms, and the critical pore sizes (dcl) or the RCP and NSSM values demonstrate similar trends showing the influence of dc in determining the ionic transport response. Electrical impedance spectroscopy (EIS) is used to relate the material response before and after the transport tests, and equivalent circuit models are used to extract the parameters that relate to the pore structure. EIS coupled with circuit modeling clearly brings out the differences between the RCP and NSSM test on their influences in the microstructure of alkali activated slag concretes.
AB - The chloride transport resistance of alkali silicate powder activated slag concretes is evaluated. Two different Na2O-to-source material ratios (n) and two SiO2-to-Na2O ratios of the activator (M s) are used on concretes proportioned using two slag contents (300 kg/m3 and 400 kg/m3). Rapid chloride permeability (RCP) and non-steady state migration (NSSM) tests are used to evaluate the chloride transport behavior. Alkali silicate powder activated concretes demonstrate comparable or better chloride transport resistance than OPC concretes when evaluated using RCP and NSSM tests. The relationships between the activator parameter, n·Ms, and the critical pore sizes (dcl) or the RCP and NSSM values demonstrate similar trends showing the influence of dc in determining the ionic transport response. Electrical impedance spectroscopy (EIS) is used to relate the material response before and after the transport tests, and equivalent circuit models are used to extract the parameters that relate to the pore structure. EIS coupled with circuit modeling clearly brings out the differences between the RCP and NSSM test on their influences in the microstructure of alkali activated slag concretes.
KW - Alkali activated slag
KW - Circuit models
KW - Electrical impedance Pore structure
KW - Non-steady state migration
KW - Powder activator
KW - Rapid chloride permeability
UR - http://www.scopus.com/inward/record.url?scp=84885387144&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84885387144&partnerID=8YFLogxK
U2 - 10.1016/j.cemconcomp.2013.06.002
DO - 10.1016/j.cemconcomp.2013.06.002
M3 - Article
AN - SCOPUS:84885387144
VL - 44
SP - 58
EP - 68
JO - Cement and Concrete Composites
JF - Cement and Concrete Composites
SN - 0958-9465
ER -