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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Influence of polymer powder on properties of cemented paste backfill
TL;DR: In this paper, the influence of EVA/VE on the mechanical, chemical, and microstructural properties of sulfidic and non-sulfidic cemented paste backfill (CPB) was investigated.
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Characterization of phosphate processing sludge from Tunisian mining basin and its potential valorization in fired bricks making
M. Ettoumi,Marouen Jouini,Carmen Mihaela Neculita,S. Bouhlel,Lucie Coudert,Yassine Taha,Mostafa Benzaazoua +6 more
TL;DR: In this article, the potential use of phosphate sludge as alternative raw material in the production of fired bricks, while substituting the natural finite clay soils, was evaluated, and the results showed that the sludge was non-plastic and mainly composed of fluoroapatite, calcite, and clays.
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Tritium speciation in nuclear reactor bioshield concrete and its impact on accurate analysis.
TL;DR: A systematic analysis of a sequence of subsamples taken from a reactor bioshield using combustion and liquid scintillation analysis has identified two forms of tritium, one weakly bound and one strongly bound.
Journal ArticleDOI
Mitigation of efflorescence of wallboard by means of bio-mineralization.
Bin Xue,Chunxiang Qian +1 more
TL;DR: Bacillus mucilaginosus was pre-added to the cement matrix to reduce the efflorescence of wallboard and this promising method was noted to be cheap, convenient, environment friendly, and which has the potential in various practical applications.
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Biofilms in Full-Scale Drinking Water Ozone Contactors Contribute Viable Bacteria to Ozonated Water.
Nadine Kotlarz,Nicole Rockey,Terese M. Olson,Sarah-Jane Haig,Larry Sanford,John J. LiPuma,Lutgarde Raskin +6 more
TL;DR: The results implicate microbial detachment from biofilms on contactor surfaces, and from biomass present within lime softening sediments in a hydraulic dead zone, as a possible reason for increasing cell concentrations in water samples from sequential ozone chambers, as well as the effluent from ozone contactors being treated further in biologically active filters and bacteria in ozonated water continuously seed filter microbial communities.
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.