Effects of water–cement ratio and curing time on the critical pore width of hardened cement paste

Atahan, Hakan Nuri; Oktar, Osman N.; Taşdemi̇r, Mehmet Ali

doi:10.1016/j.conbuildmat.2008.08.011

Cited by 92 publications

(30 citation statements)

References 14 publications

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“…The intensity of occurrence of pores of this size also decreases. Similar observations concerning both cement pastes and mortars were presented by the authors of the publications [1,[31][32][33].…”

Section: Test Resultssupporting

confidence: 72%

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Open porosity of cement pastes and their gas permeability

Tracz

2016

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. This paper presents the results of extensive research work on the open porosity and gas permeability of cement pastes. Tests were conducted on cement pastes with different water/cement ratios and types of cement. The three most popular cements in Poland from the CEM I, CEM II and CEM III groups were tested after the pastes had been cured for 90 days in laboratory conditions. The scope of experiments included the assessment of open porosity determined using three different methods: comparing the bulk and specific densities, mercury intrusion porosimetry and saturating the material with water. In addition, this article contains an analysis of the porosity characteristics based on the distributions produced by porosimetry examinations. Gas permeability was determined using the modified RILEM-Cembureau laboratory method. The results of the completed test allowed a quantitative determination to be made of the impact of water-cement ratio and type of cement used on open porosity assessed by various methods, and the influence of these parameters on the gas permeability of the paste. The quantitative changes in the content of capillary pores and meso-pores in the cement pastes analysed are also presented.

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Section: Test Resultssupporting

confidence: 72%

“…4). In their publications, many researchers [1,30,31] have proven that a comparison of these two values is very useful when studying and analysing cement pastes with different w/c ratios. Fig.…”

Section: Test Resultsmentioning

confidence: 99%

Open porosity of cement pastes and their gas permeability

Tracz

2016

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…The porosity of cementitious material increases according to the W/C ratio. Whenever W/C ratio increase, the initial porosity to be filled by hydrates increase [31,32]. Fig.…”

Section: Resultsmentioning

confidence: 96%

Moisture characterization of cementitious material properties: Assessment of water vapor sorption isotherm and permeability variation with ages

Issaadi

Nouviaire

Belarbi

et al. 2015

Construction and Building Materials

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“…Between sample M-NC-0-180d and M-NC-1-180d, the addition of CLDH slightly reduced the overall water/solids ratio, increased the degree of reaction in sodium carbonate-activated slag cement at this given curing time, and at the same time performs partially as a filler [14], all of which factors contribute to the lower critical pore diameter observed in sample M-NC-180d [62]. The more homogeneous microstructure in the paste section (between the unreacted slag grains) in CLDH-modified sodium carbonate-activated slag paste also contributes to the lower overall porosity of mortars produced with these additions.…”

Section: Pore Structure (Mip)mentioning

confidence: 98%

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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Effects of water–cement ratio and curing time on the critical pore width of hardened cement paste

Cited by 92 publications

References 14 publications

Open porosity of cement pastes and their gas permeability

Open porosity of cement pastes and their gas permeability

Moisture characterization of cementitious material properties: Assessment of water vapor sorption isotherm and permeability variation with ages

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

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