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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A thermoanalytical, X-ray diffraction and petrographic approach to the forensic assessment of fire affected concrete in the United Arab Emirates
TL;DR: Data derived from thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) are reported in order to assess the usefulness of these techniques in fire scene investigation to differentiate between these temperature regimes.
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Properties of alkali-activated slag with addition of cation exchange material
TL;DR: In this article, two representative cation exchange materials, vermiculite and 5A zeolite, were added at mass ratio of 5% and 10% to slag activated by sodium hydroxide.
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Investigations on the rehydration of recycled blended SCMs cement
TL;DR: In this paper , a comprehensive experimental program combining QXRD, TG, SEM, isothermal calorimetry, MIP and mechanical tests was performed to contribute to a better knowledge of the dehydration and rehydration of blended SCMs(SF, FA, GGBS, LS)-cement pastes.
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An Experimental Investigation of Laser Scabbling of Concrete
TL;DR: In this article, an experimental procedure was established to assess the effects of various parameters that may be critical for the effectiveness of the concrete scabbling process, such as material composition and initial moisture content.
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Ba(OH) 2 - blast furnace slag composite binders for encapsulation of sulphate bearing nuclear waste
TL;DR: In this article, the feasibility of the immobilisation of sulphate bearing radioactive wastes in blast furnace slag (BFS) based binders was investigated, and two methods using Na2SO4 as a waste simulant, along with Ba(OH)2 to promote precipitation of BaSO4 in an insoluble sulphate form and the consequent activation of the BFS were presented.
References
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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.
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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.
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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.
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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.
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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.