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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Application of Taguchi method for optimization of concrete strengthened with polymer after high temperature
Harun Tanyildizi,Murat Şahin +1 more
TL;DR: In this article, the importance of experimental parameters on the compressive strength and ultrasonic pulse velocity of concrete strengthened with polymer after exposure to high temperature was investigated statistically, and thirty-two experiments were conducted according to the L 32 (2 1 ǫ× 4 9 ) array proposed by the Taguchi method.
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Performance at high temperature of alkali-activated slag pastes produced with silica fume and rice husk ash based activators
TL;DR: In this article, the authors assessed the mechanical properties, and structural changes induced by high temperature exposure, of alkali-silicate activated slag cements produced with sodium silicates derived from silica fume (SF) and rice husk ash (RHA).
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Increasing efficiency of carbon dioxide sequestration through high temperature carbonation of cement-based materials
TL;DR: In this paper, high temperature carbonation is proposed to accelerate the carbon dioxide sequestration speed in a broad temperature range (20°C-300°C), demonstrating that carbonation speed was greatly affected by temperature, with optimum carbonation temperature appearing at around 100°C, at which cement paste samples could achieve the fastest carbonation reaction at a rate of 16.4%/h in the first 1
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Structural evolution of synthetic alkali-activated CaO-MgO-Na2O-Al2O3-SiO2 materials is influenced by Mg content
Brant Walkley,Brant Walkley,Rackel San Nicolas,Marc-Antoine Sani,Susan A. Bernal,Jannie S.J. van Deventer,John L. Provis +6 more
TL;DR: In this article, the formation of hydrotalcite-group and AFm-type phases is linked to increased C-(N)-A-S-H gel polymerisation, decreased gel Al uptake and increased formation of the third aluminate hydrate.
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Recycling of biomass and coal fly ash as cement replacement material and its effect on hydration and carbonation of concrete.
TL;DR: Results show that incorporating biomass fly ash into construction materials has a similar carbonation behaviour to coal fly ash and this may present benefits to the construction materials and for the ash management.
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.