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Thermally activated dolomite as pozzolanic addition to Portland cement
Advances in Cement Research, 2016Dolomite (CaMg(CO3)2) is widespread in nature and can be thermally activated to form a product composed of an intimate mixture of periclase (MgO) and calcite (CaCO3). This mixture, referred to as ‘half-burnt dolomite’, can be obtained under specific experimental conditions of temperature and atmosphere composition.
Guillaume Jauffret, Fredrik P. Glasser
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The pozzolanic reaction of metakaolinite and its effects on Portland cement hydration
Journal of Materials Science, 1993Metakaolinite was prepared from kaolinite by thermal treatment. Subsequent reaction of the metakaolinite with calcium hydroxide and water resulted in a cementitious material whose reaction kinetics were followed at a molecular level at both ambient and elevated temperatures using trimethylsilylation.
A. M. Dunster +2 more
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Evaluation of pozzolanic Portland cement as geotechnical stabilizer of a dispersive clay
International Journal of Geotechnical Engineering, 2019In this research, through a comprehensive geotechnical testing program, the pozzolanic Portland cement was investigated for its potential as treatment additive to the problematic Iranian dispersive...
Amir Hossein Vakili +3 more
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Comparison of the Pozzolanic Reactivity for Flash and Soak Calcined Clays in Portland Cement Blends
2015The increased attention towards the use of calcined clays as supplementary cementitious materials (SCM’s) has prompted several studies of calcined kaolinite (metakaolin) and to a lesser extent also of heat-treated montmorillonite. However, a major part of these studies does not pay specific attention to the calcination process itself. Furthermore, most
Enemark-Rasmussen, Kasper +4 more
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Pozzolanic Interaction Between Portland Cement and Silica Fume in Concrete
"SP-178: Sixth CANMET/ACI/JCI Conference: FLy Ash, Silica Fume, Slag & Natural Pozzolans in Concrete", 1998This article outlines an experimental and numerical study of the long-term interaction between silica fume and Portland cement in concrete subjected to air, water or sealed curing. For this purpose about 2000 kg of eight qualities of concrete were studied at 4 different ages each over a period of 90 months.
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Physical, mechanical, and durability properties of gypsum–Portland cement–natural pozzolan blends
Canadian Journal of Civil Engineering, 2001This paper deals with the effect of gypsumPortland cement and gypsumPortland cementnatural pozzolan ratios on the physical, mechanical, and durability properties of gypsumPortland cementnatural pozzolan blends. The results indicate that the setting time of these paste decreases with the increase of gypsum content in the mixture, ranging from 8 to
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EFFECT OF PORTLAND-POZZOLAN CEMENTS ON CONCRETE MATURITY
2015The maturity concept expressed by the combined effect of time and temperature on the concrete is a useful technique for prediction of the strength gain of concrete. According to maturity concept, samples of the same concrete at same maturity whatever combination of temperature and time, have approximately the same strength. Many maturity functions have
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