Influence of pozzolans and slag on the microstructure of partially carbonated cement paste by means of water vapour and nitrogen sorption experiments and BET calculations

Belie, Nele De; Krátký, Josef; Vlierberghe, Sandra Van

doi:10.1016/j.cemconres.2010.08.014

Cited by 139 publications

(61 citation statements)

References 23 publications

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“…Effectively, because of larger radius than water molecules, nitrogen molecules are adsorbed mainly into mesoporous spaces but do not easily enter the intra-layer spaces. This difference between nitrogen adsorption and water adsorption was already addressed by De Belie et al (2010) who also found that the BET specific surface area measured by nitrogen adsorption is lower than that measured by water adsorption. According to the authors, it is possible that the nitrogen molecules can not enter the spaces between C-S-H inter-layers and therefore do not cover all of the anfractuosities in this porous domain.…”

Section: Specific Surface Areamentioning

confidence: 84%

Effects of Carbonation on the Microstructure of Cement Materials: Influence of Measuring Methods and of Types of Cement

Phạm

Prince

2014

Int J Concr Struct Mater

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The objective of this work was to examine the influence of carbonation on the microstructure of cement materials. Different materials, which were CEM I mortar and paste, CEM II mortar and paste, were carbonated at 20°C, 65 % relative humidity and 20 % of CO 2 concentration. The specific surface area and pore size distribution were determined from two methods: nitrogen adsorption and water adsorption. The results showed that: (1) nitrogen adsorption and water adsorption do not cover the same porous domains and thus, we observed conflicts in the results obtained by these two techniques; (2) the CEM II based materials seemed to be more sensible to a creation of mesoporosity after carbonation than the CEM I based materials. The results of this study also helped to explain why observations in the literature diverge greatly on the influence of carbonation on specific surface area.

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Section: Specific Surface Areamentioning

confidence: 84%

Effects of Carbonation on the Microstructure of Cement Materials: Influence of Measuring Methods and of Types of Cement

Phạm

Prince

2014

Int J Concr Struct Mater

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“…In these areas it has been proven that the use of sorption balance is able to obtain similar results to other common techniques (Johannesson and Janz 2002;Arlabosse et al 2003;Fei et al 2006). Over the last 10 years, sorption balances have been put to use more and more for cementitious materials (Anderberg and Wadsö 2008;Johannesson and Utgenannt 2001;Johannesson 2002;Robens et al 2002;Espinosa and Franke 2006;Åhs 2008;Scheffler et al 2009;De Belie et al 2010;Maruyama 2010;Dubina et al 2011;Pavlík et al 2012;Dubina et al 2014;Saeidpour and Wadsö 2015;Jennings et al 2015;M. Wu et al 2014;Kumar et al 2014;Snoeck et al 2014;Baquerizo et al 2016;Aktas et al 2015;Maruyama et al 2015).…”

Section: Introductionmentioning

confidence: 83%

The Use of Sorption Balance for the Characterization of the Water Retention Curve of Cement-Based Materials

Poyet

Trentin

Amblard

2016

ACT

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Among the necessary data in the description of the transport of water, the retention curve is a vital piece of information whose characterization can turn out to be long and fastidious. Within this framework, sorption balance is being put to use more and more often in laboratories. These experimental devices enable a faster onset for water balance using small amounts of substances previously reduced to powder. This approach proves to be particularly adapted to homogenous materials (cement pastes generally) but not to concrete because of the presence of aggregate. This article, first of all, clarifies in a summarized manner the working of sorption balance based on the results obtained with cement pastes. Secondly, a simplified method is proposed to test concrete.

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“…Burnauer-Emmett-Teller (BET) isotherm analysis is frequently used to study the adsorption properties of many types of materials [9]. In the present research, nitrogen adsorption isotherms were used to investigate the pore structure of the adhesives before and after pull-out testing.…”

Section: Pore Structure Analysesmentioning

confidence: 99%

Assessing the Contribution of the CFRP Strip of Bearing the Applied Load Using Near-Surface Mounted Strengthening Technique with Innovative High-Strength Self-Compacting Cementitious Adhesive (IHSSC-CA)

2018

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Efficient transfer of load between concrete substrate and fibre reinforced polymer (FRP) by the bonding agent is the key factor in any FRP strengthening system. An innovative high-strength self-compacting non-polymer cementitious adhesive (IHSSC-CA) was recently developed by the authors and has been used in a number of studies. Graphene oxide and cementitious materials are used to synthesise the new adhesive. The successful implementation of IHSSC-CA significantly increases carbon FRP (CFRP) strip utilization and the load-bearing capacity of the near-surface mounted (NSM) CFRP strengthening system. A number of tests were used to inspect the interfacial zone in the bonding area of NSM CFRP strips, including physical examination, pore structure analysis, and three-dimensional laser profilometery analysis. It was deduced from the physical inspection of NSM CFRP specimens made with IHSSC-CA that a smooth surface for load transfer was found in the CFRP strip without stress concentrations in some local regions. A smooth surface of the adhesive layer is very important for preventing localized brittle failure in the concrete. The pore structure analysis also confirmed that IHSSC-CA has better composite action between NSM CFRP strips and concrete substrate than other adhesives, resulting in the NSM CFRP specimens made with IHSSC-CA sustaining a greater load. Finally, the results of three-dimensional laser profilometery revealed a greater degree of roughness and less deformation on the surface of the CFRP strip when IHSSC-CA was used compared to other adhesives.

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Influence of pozzolans and slag on the microstructure of partially carbonated cement paste by means of water vapour and nitrogen sorption experiments and BET calculations

Cited by 139 publications

References 23 publications

Effects of Carbonation on the Microstructure of Cement Materials: Influence of Measuring Methods and of Types of Cement

Effects of Carbonation on the Microstructure of Cement Materials: Influence of Measuring Methods and of Types of Cement

The Use of Sorption Balance for the Characterization of the Water Retention Curve of Cement-Based Materials

Assessing the Contribution of the CFRP Strip of Bearing the Applied Load Using Near-Surface Mounted Strengthening Technique with Innovative High-Strength Self-Compacting Cementitious Adhesive (IHSSC-CA)

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