Mercury intrusion porosimetry in concrete technology: tips in measurement, pore structure parameter acquisition and application

Ma, Hongyan

doi:10.1007/s10934-013-9765-4

Cited by 290 publications

(106 citation statements)

References 48 publications

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“…Several fragments were obtained from the middle of mortar specimens, immersed in isopropanol for 14 days, then placed into a desiccator and evacuated for 2 days [18]. The pore diameter was derived using Washburn's law: D ¼ À4 cos h ð Þ c=P, where D is the pore diameter (lm), h the contact angle between the fluid and the pore mouth (130°; [19]), c the surface tension of the fluid (485 mN/m; [19]), and P the applied pressure to fill up the pore with mercury (MPa). The porosimeter employed was a Micromeritics Autopore V 9600, with a maximum pressure of 208 MPa.…”

Section: Compressive Strength and Mercury Intrusion Porosimetry (Mip)mentioning

confidence: 99%

Influence of slag composition on the stability of steel in alkali-activated cementitious materials

et al. 2017

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Among the minor elements found in metallurgical slags, sulfur and manganese can potentially influence the corrosion process of steel embedded in alkali-activated slag cements, as both are redox-sensitive. Particularly, it is possible that these could significantly influence the corrosion process of the steel. Two types of alkali-activated slag mortars were prepared in this study: 100% blast furnace slag and a modified slag blend (90% blast furnace slag ? 10% silicomanganese slag), both activated with sodium silicate. These mortars were designed with the aim of determining the influence of varying the redox potential on the stability of steel passivation under exposure to alkaline and alkaline chloride-rich solutions. Both types of mortars presented highly negative corrosion potentials and high current density values in the presence of chloride. The steel bars extracted from mortar samples after exposure do not show evident pits or corrosion product layers, indicating that the presence of sulfides reduces the redox potential of the pore solution of slag mortars, but enables the steel to remain in an apparently passive state. The presence of a high amount of MnO in the slag does not significantly affect the corrosion process of steel under the conditions tested. Mass transport through the mortar to the metal is impeded with increasing exposure time; this is associated with refinement of the pore network as the slag continued to react while the samples were immersed.

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Section: Compressive Strength and Mercury Intrusion Porosimetry (Mip)mentioning

confidence: 99%

Influence of slag composition on the stability of steel in alkali-activated cementitious materials

et al. 2017

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“…The dried samples were subjected to mercury intrusion during which the pressure was increased up to 400 MPa (initially low pressure followed by high pressure). The mercury-concrete contact angle was taken as 140° (Ma 2014). Washburn equation (Washburn 1921) was used to convert the pressure into relevant pore diameter while Katz-Thompson model (Katz and Thompson 1986) was employed to determine the permeability.…”

Section: Testing For Morphological and Microstructural Characterizationmentioning

confidence: 99%

“…It was, generally, seen that the permeability increased with increasing LWF amount in the composite. Although, the permeability values obtained from Katz-Thompson model were not accurate rather over-estimated for the composites under evaluation (Ma 2014;Ma et al 2014) still the values could be used for comparative assessment.…”

Section: Microstructural and Morphological Characterizationmentioning

confidence: 99%

Effects of Different Lightweight Functional Fillers for Use in Cementitious Composites

Hanif

Cheng

et al. 2017

Int J Concr Struct Mater

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Abstract:The effects of different lightweight functional fillers on the properties of cement-based composites are investigated in this study. The fillers include fly ash cenospheres (FACs) and glass micro-spheres (GMS15 and GMS38) in various proportions. The developed composites were tested for compressive, flexural and tensile strengths at 10 and 28-day ages. The results indicated that both FACs and GMS38 are excellent candidates for producing strong lightweight composites. However, incorporation of GMS15 resulted in much lower specific strength values (only up to 13.64 kPa/kg m 3 ) due to its thinner shell thickness and lower isostatic crushing strength value (2.07 MPa). Microstructural analyses further revealed that GMS38 and GMS15 were better suited for thermal insulating applications. However, higher weight fraction of the fillers in composites leads to increased porosity which might be detrimental to their strength development.

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“…Mercury intrusion porosity (MIP) was used according to the test procedure recommended by Ma [41]. Samples were sectioned from cubic specimens using a slow saw, with dimensions of no less than 5 mm each side.…”

Section: Test Methods For Aas Mortarsmentioning

confidence: 99%

Chloride binding and mobility in sodium carbonate-activated slag pastes and mortars

Bernal

Hussein

et al. 2017

Mater Struct

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This study evaluates the chloride binding capacity and the migration of chloride in sodium carbonate-activated slag cements and mortars. The effect on chloride mobility and binding of adding a calcined layered double hydroxide (CLDH) to the binder mix was also assessed. Significantly improved durability characteristics can be achieved for sodium carbonate-activated slag mortars by the addition of small fractions of CLDH, as a consequence of a higher degree of reaction, higher chloride binding capacity, and the refined pore structures present in these modified materials, in comparison with alkali-activated cements produced without CLDH. The addition of CLDH enables the production of sodium carbonateactivated slag cements with notably reduced chloride ingress compared to silicate activated slag cements.

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Mercury intrusion porosimetry in concrete technology: tips in measurement, pore structure parameter acquisition and application

Cited by 290 publications

References 48 publications

Influence of slag composition on the stability of steel in alkali-activated cementitious materials

Influence of slag composition on the stability of steel in alkali-activated cementitious materials

Effects of Different Lightweight Functional Fillers for Use in Cementitious Composites

Chloride binding and mobility in sodium carbonate-activated slag pastes and mortars

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