Properties of Concrete With High Aluminate Type Portland Cement

Goto, Takahiro; Nakamura, Tadahisa; Takao, Noboru; Naruse, Hajime

doi:10.14250/cement.64.219

Cited by 1 publication

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are a number of models for simulation of the ionic transport into cementitious materials [4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…The interaction between the ingress of ionic species and cement hydrates is influenced by the physical and chemical properties of the pore systems. Some research has highlighted the influence of EDL properties on ionic diffusion [9,16,[21][22][23][24]. Chatterji and Kawamura estimated the thickness of EDL and its characteristics on ionic transport [16].…”

Section: Introductionmentioning

confidence: 99%

“…In salt solution, diffusing chloride ions are much more affected by the surface charge than sodium ions in mature cement paste [9,22]. It is generally known that the porosity of cementitious materials significantly influences chloride transport.…”

Section: Introductionmentioning

confidence: 99%

“…It is generally known that the porosity of cementitious materials significantly influences chloride transport. However, the total pore volume does not make any relationship with the measured apparent diffusion coefficient of chloride in mature cement paste [9,14].…”

Section: Introductionmentioning

confidence: 99%

“…Goto et al proposed a model for the EDL in hydrated cement paste [9]. This model can explain why the apparent diffusion coefficients of cations are lower than that of anions in hydrated cement paste.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Ion-cement hydrate interactions govern multi-ionic transport model for cementitious materials

Elakneswaran

Iwasa

Nawa

et al. 2010

Cement and Concrete Research

107

View full text Add to dashboard Cite

The main objective of this investigation is to describe the interaction between cement hydrates and electrolyte solution to understand multi-ionic transport in cementitious materials. A surface complexation model in PHREEQC including an electrostatic term is used to simulate the ionic adsorption on the calcium silicate hydrate (C-S-H) surface. The equilibrium constants for the adsorption of ions on C-S-H surfaces are obtained by fitting experimental data to the model. The adsorption of both divalent and mono-valent cations, and also anions significantly changes the surface charges of hydrated paste. Chloride is being held in a chemical binding as Friedel's salt and bound mainly by the adsorptive action of C-S-H. An integrated modelling approach employing a phaseequilibrium model, a surface complexation model, and a multi-component diffusion model has been developed in PHREEQC to simulate the multi-ionic transport through hydrated cement paste. It was found that the physical adsorption of ions on C-S-H, the size of pores, and the surface site density of C-S-H govern the rate of penetration of ionic species. Finally, the proposed model has been validated against chloride profiles measured in this study as well as with data available in the literature for hydrated cement paste.

show abstract

“…There are a number of models for simulation of the ionic transport into cementitious materials [4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%