Journal ArticleDOI
The use of thermal analysis in assessing the effect of temperature on a cement paste
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TLDR
In this article, the effect of temperature in the mineralogical composition of cement hydration products has been studied using thermogravimetric analysis (TGA) and DTG curves, which can be used to determine fire conditions and the consequent deterioration expected in the cement paste.About:
This article is published in Cement and Concrete Research.The article was published on 2005-03-01. It has received 709 citations till now. The article focuses on the topics: Cement & Portlandite.read more
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Dissertation
Etude des couplages Thermo-Hydro-Chemo-Mécaniques pour la prévision du comportement des grands ouvrages en béton armé et béton précontraint
TL;DR: HAL as discussed by the authors is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not, which may come from teaching and research institutions in France or abroad, or from public or private research centers.
Dissertation
Environmentally friendly concrete paving blocks for photodegradation of air pollutants
TL;DR: In this article, the authors present three publications arising from the Threshold of the Earth: I.III publications ARISING from the Earth, II.III ABBREVIATIONS, VII ACKNOWLEDGEMENTS, VIII contents, IX list of FIGURES, and XIV list of TABLES.
Journal ArticleDOI
Phase assemblage of a 5 year-old cement paste after submission to various high temperature and cooling regime
TL;DR: In this article, the effect of temperature exposure on the phase assemblage of the cementitious matrix has been investigated, where the authors investigate the changes of a cement paste, heated up to various temperature up to 1000°C then cooled in water or cooled in air for comparison.
Journal ArticleDOI
The investigation of concrete damage and recycled aggregate properties under microwave and conventional heating
TL;DR: In this article , the effect of microwave and conventional irradiation on concrete under different heating paths was studied and the results showed that microwave heating has greater advantages than conventional heating methods that can effectively promote the development of interfacial cracks between mortar and aggregate, weaken the strength of concrete and liberate high-quality RCA under certain conditions.
Journal ArticleDOI
Composition Changes in Cement Matrix of RC Column Exposed to Fire
Jung-Joong Kim,Kwang-Soo Youm +1 more
TL;DR: In this paper, the authors examined the changes of microstructural compositions in cement matrix according to the depth from the surface of a reinforced concrete (RC) column exposed to fire, and the experimental results indicated that the amount of C-S-H loss at the center of column experiencing the transferred fire temperature of 236 °C has been underestimated.
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Journal ArticleDOI
Compressive strength of concrete at high temperatures: a reassessment
TL;DR: In this paper, a reassessment of the subject is given, which considers material and environmental factors/mechanisms influencing the strength of concrete during the heat cycle and after cooling, not all of which necessarily result in strength loss.
Journal ArticleDOI
Thermal stability and decomposition mechanisms of ettringite at <120°C
Q. Zhou,Fredrik P. Glasser +1 more
TL;DR: In this article, the decomposition and reformation of ettringite is studied as a function of water vapour pressure and temperature, and the authors make recommendations for the upper safe service limits for ETTringite-based cements.
Journal ArticleDOI
Physicochemical, mineralogical, and morphological characteristics of concrete exposed to elevated temperatures
TL;DR: In this paper, the effect of elevated temperatures on the mineralogical changes occurring in the hydrated phases of concrete cubes were studied by measuring ultrasonic pulse velocity (UPV) and consequent deterioration in the compressive strength with increase in temperature.
Journal ArticleDOI
Differential scanning calorimetry study of ordinary Portland cement
Wei Sha,E.A. O’Neill,Z. Guo +2 more
TL;DR: In this article, the thermal behavior of hydration products in ordinary Portland cement as a function of age was investigated using differential scanning calorimeter (DSC) and X-ray diffraction analysis.
Journal ArticleDOI
Elastic properties of high alumina cement castables from room temperature to 1600°C
TL;DR: In this article, high-alumina refractory castables with compositions in the systems CaO-Al2O3 and CaO−Al 2O3-SiO2 were studied using an ultrasonic technique.