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
Citations
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Journal ArticleDOI
Cement hydration in the presence of black gram pulse
TL;DR: In this paper, the hydration characteristics of OPC in the presence of different concentrations of BGP were studied with the help of calorimetric, differential scanning calorimietric, powder X-ray diffraction, UV-visible, Fourier transform-infrared and Mossbauer spectroscopic techniques.
Dissertation
Concepção de um saferoom anti-tornado em betão geopolimérico
TL;DR: Dissertacao Mestrado em Engenharia Civil - Opcao de Materiais e Reabilitacao da Construcao as discussed by the authors.
Journal ArticleDOI
New Approach for the Determination of Radiological Parameters on Hardened Cement Pastes with Coal Fly Ash
Ana María Moreno de los Reyes,J. A. Suárez-Navarro,M.M. Alonso,C. Gascó,Isabel Sobrados,Francisca Puertas +5 more
TL;DR: In this paper, a new method for calculating the gamma-ray activity concentration index (ACI) from measurements made on unground 5 cm cubic specimens was proposed. But this method is not suitable for concrete materials.
Journal ArticleDOI
Effect of power ultrasound-assisted mixing on the hydration and microstructural development of cement paste
Dissertation
Cementitious Grouts for ILW Encapsulation – Composition, Hydration and Performance.
TL;DR: In this article, the impact of slag composition and slag fineness on the rate and degree of hydration of a composite grouting material was investigated at 20°C, and the resilience to potential fire scenarios was also investigated through simulated heat testing of samples and subsequent analysis.
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.
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.
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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.
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.