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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ye, Guang
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (42/42 displayed)
- 2023Future perspectives for alkali-activated materials: from existing standards to structural applicationscitations
- 2022Report of RILEM TC 267-TRM phase 3: validation of the R3 reactivity test across a wide range of materialscitations
- 2022Report of RILEM TC 267-TRM phase 3: validation of the R3 reactivity test across a wide range of materialscitations
- 2022The role of porosity on degradation of concrete under severe internal and external brine attack in confined conditionscitations
- 2022Report of RILEM TC 267-TRM phase 2: optimization and testing of the robustness of the R3 reactivity tests for supplementary cementitious materialscitations
- 2022Report of RILEM TC 267-TRM phase 2: optimization and testing of the robustness of the R3 reactivity tests for supplementary cementitious materialscitations
- 2020RILEM TC 247-DTA round robin testcitations
- 2020Effects of heat and pressure on hot-pressed geopolymercitations
- 2020Evaluating compressive mechanical LDPM parameters based on an upscaled multiscale approachcitations
- 2019Strain-Hardening Cementitious Composite (SHCC) For Durable Concrete Repair
- 2019RILEM TC 247-DTA round robin testcitations
- 2019RILEM TC 247-DTA round robin test: mix design and reproducibility of compressive strength of alkali-activated concretescitations
- 2019RILEM TC 247-DTA round robin test: mix design and reproducibility of compressive strength of alkali-activated concretescitations
- 2018Reactivity tests for supplementary cementitious materialscitations
- 2018Microstructure-based prediction of thermal properties of cement paste at early ages
- 2018CO2 binding capacity of alkali-activated fly ash and slag pastescitations
- 2018Reactivity tests for supplementary cementitious materials RILEM TC 267-TRM phase 1citations
- 2018Microstructure-based 3d modelling of diffusivity in sound and cracked cement paste
- 2018Effect of natural carbonation on the pore structure and elastic modulus of the alkali-activated fly ash and slag pastescitations
- 2018Reactivity tests for supplementary cementitious materials: RILEM TC 267-TRM phase 1citations
- 2018Development and application of an environmentally friendly ductile alkali-activated compositecitations
- 2017Moisture movement in cement-based repair systems monitored by X-ray absorption
- 2017Moisture movement in cement-based repair systems monitored by X-ray absorption
- 2017Failure modes in concrete repair systems due to ongoing corrosioncitations
- 2017Upscaling cement paste microstructure to obtain the fracture, shear, and elastic concrete mechanical LDPM parameterscitations
- 2017Failure Modes in Concrete Repair Systems due to Ongoing Corrosioncitations
- 2017Numerical benchmark campaign of cost action tu1404 – microstructural modellingcitations
- 2016Interactie beton en reparatiemiddel (1)
- 2016A 3D lattice modelling study of drying shrinkage damage in concrete repair systemscitations
- 2016Interactie beton en reparatiemiddel (2)
- 2015Evolution of microstructure and transport properties of cement pastes due to carbonation under a CO2 pressure gradient: a modeling approach
- 2015Using nano-indentation and microscopy to obtain mechanical properties
- 2014A modelling study of drying shrinkage damage in concrete repair systems
- 2014SHCC3: Strain Hardening Cementitious Composites
- 2014Damage induced by continued corrosion in concrete repair systems
- 2013Micromechanical study of the interface properties of concrete repair systems
- 2013Concrete in engineered barriers for radioactive waste disposal facilities: phenomenological study and assessment of long term performance
- 2012Hardening process of binder paste and microstructure developmentcitations
- 2010Modelling and predicting effects of deterioration mechanisms
- 2008X-ray computed microtomography on cementitious materials
- 2008Material properties of mortar specimens at early stage of hydration in the presence of polymeric nano-aggregates
- 2006Theoretical approach to calculate surface chloride content Cs of submerged concrete under sea water laden environment
Places of action
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article
Effect of natural carbonation on the pore structure and elastic modulus of the alkali-activated fly ash and slag pastes
Abstract
The aim of this paper was to investigate the effect of natural carbonation on the pore structure, and elastic modulus (E m ) of alkali-activated fly ash (FA) and ground granulated blast furnace slag (GBFS) pastes after one year of exposure in the natural laboratory conditions. The chemical changes due to carbonation were examined by X-ray diffraction (XRD), scanning electron microscope/energy-dispersive X-ray (SEM−EDX) and attenuated total reflectance Fourier transformed infrared spectroscopy (ATR-FTIR). Subsequently, the pore structure and E m of the degraded material were tested by mercury intrusion porosimetry (MIP), nitrogen (N 2 ) adsorption, and nanoindentation. The chemical degradation of alkali-activated pastes due to natural carbonation is showed to be dependent on the GBFS content and their pore structure development. It was found that the pure alkali-activated GBFS paste was not carbonated at all within the tested period due to fine gel pore structure. On the other hand, carbonation of the gel in the pastes consisting FA and GBFS generated significant mineralogical and microstructural changes. The extensive decalcification of the gel was reflected in the increase of nanoporosity. Consequently, the E m of the carbonated pastes decreased. This study suggests that the degradation of alkali-activated FA and GBFS pastes due to carbonation may be accurately evaluated through micromechanical properties measurements rather than only by testing alkalinity of the pore solution and corrosion of reinforcement such as commonly studied carbonation effect in the ordinary Portland cement (OPC)-based materials. ; Materials and Environment ; Concrete Structures