Journal ArticleDOI
Experimental studies and thermodynamic modeling of the carbonation of Portland cement, metakaolin and limestone mortars
Zhenguo Shi,Barbara Lothenbach,Mette Rica Geiker,Josef Kaufmann,Andreas Leemann,Sergio Ferreiro,Jørgen Skibsted +6 more
TLDR
In this article, the carbonation of Portland cement, metakaolin and limestone mortars has been investigated after hydration for 91 days and exposure to 1% (v/v) CO 2 at 20°C/57% RH for 280 days.About:
This article is published in Cement and Concrete Research.The article was published on 2016-10-01. It has received 170 citations till now. The article focuses on the topics: Carbonation & Metakaolin.read more
Citations
More filters
Journal ArticleDOI
Supplementary cementitious materials: New sources, characterization, and performance insights
TL;DR: In this paper, a review of emerging supplementary cementitious materials (SCM) sources is presented, along with new developments in characterizing and qualifying SCMs for use and improved knowledge of SCM on long-term concrete performance and durability.
Journal ArticleDOI
Changes in microstructure characteristics of cement paste on carbonation
TL;DR: In this paper, the influence of carbonation on the microstructure of cement paste cast with Ordinary Portland Cement, fly ash based Portland Pozzolana Cement (PPC) and Limestone Calcined Clay Cements (LC3) using X-ray diffraction (XRD), thermal analysis (TGA), scanning electron microscope (SEM) and mercury intrusion porosimeter (MIP).
Journal ArticleDOI
Friedel's salt profiles from thermogravimetric analysis and thermodynamic modelling of Portland cement-based mortars exposed to sodium chloride solution
Zhenguo Shi,Mette Rica Geiker,Barbara Lothenbach,Klaartje De Weerdt,Sergio Ferreiro Garzón,Kasper Enemark-Rasmussen,Jørgen Skibsted +6 more
TL;DR: In this paper, thermogravimetric analysis (TGA), powder X-ray diffraction (XRD) and thermodynamic modeling have been used to obtain Friedel's salt profiles for saturated mortar cylinders exposed to a 2.8 m NaCl solution.
Journal ArticleDOI
Role of calcium on chloride binding in hydrated Portland cement–metakaolin–limestone blends
Zhenguo Shi,Mette Rica Geiker,Klaartje De Weerdt,Klaartje De Weerdt,Tone Anita Østnor,Barbara Lothenbach,Frank Winnefeld,Jørgen Skibsted +7 more
TL;DR: Chloride binding for Portland cement-metakaolin-limestone pastes exposed to CaCl 2 and NaCl solutions is investigated in this paper, where the phase assemblages and the amount of Friedel's salt are evaluated using TGA, XRD and thermodynamic modeling.
Journal ArticleDOI
Effect of alkali dosage and silicate modulus on carbonation of alkali-activated slag mortars
TL;DR: In this paper, carbonation of AAS mortars activated by NaOH and waterglass with different alkali dosages and silicate moduli has been investigated after exposure to 3.2% (v/v) CO2 at 20.5% RH for 56 days.
References
More filters
Journal ArticleDOI
Influence of limestone on the hydration of Portland cements
TL;DR: In this paper, the influence of the presence of limestone on the hydration of Portland cement was investigated, and it was shown that the stabilisation of monocarbonate in the absence of limestone indirectly stabilised ettringite, leading to a corresponding increase of the total volume of the hydrate phase and a decrease of porosity.
Journal ArticleDOI
Thermodynamic Modelling of the Effect of Temperature on the Hydration and Porosity of Portland Cement
TL;DR: In this article, the phase assemblage and pore solution of Portland cements hydrated between 0-60°C were modeled as a function of time and temperature, and a good correlation between calculated porosity and measured compressive strength was observed.
Journal ArticleDOI
Cement substitution by a combination of metakaolin and limestone
TL;DR: In this paper, the coupled substitution of metakaolin and limestone in Portland cement (PC) was investigated and the mechanical properties were studied in mortars and the microstructural development in pastes by X-ray diffraction, thermogravimetry analysis, mercury intrusion porosimetry and isothermal calorimetry.
Journal ArticleDOI
The Role of Calcium Carbonate in Cement Hydration
TL;DR: In this paper, it is shown by experiment and calculation that much, if not all, of this calcite is reactive and affects the distribution of lime, alumina and sulfate and thereby alters the mineralogy of hydrated cement pastes.
Journal ArticleDOI
GEM-Selektor geochemical modeling package: revised algorithm and GEMS3K numerical kernel for coupled simulation codes
Dmitrii A. Kulik,Thomas Wagner,Svitlana V. Dmytrieva,Georg Kosakowski,Ferdinand F. Hingerl,Ferdinand F. Hingerl,Konstantin V. Chudnenko,Urs Berner +7 more
TL;DR: Substantial improvements and extensions to the revised GEM interior point method algorithm based on Karpov’s convex programming approach are described, as implemented in the GEMS3K C/C+ + code, which is also the numerical kernel of GEM-Selektor v.3 package.