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Effect of pozzolans with different physical and chemical characteristics on concrete properties
Materiales de Construccion, 2016 The durability of concrete structures is an important issue nowadays. Specifically in the case of reinforced concrete bridges or other infrastructures one of the main form of environmental attack is the penetration of chloride ions, which leads to ...
H. Paiva +3 more
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Nigerian Journal of Technological Development, 2022 Research into substituting recycled materials for cement and aggregates can yield beneficial natural resource conservation, waste management, cost savings, and reduced embodied energy in concrete.
Stephen Adeyemi Alabi, Jeffrey Mahachi
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Effects of the secondary minerals of the natural pozzolans on their pozzolanic activity
Cement and Concrete Research, 2008 Abstract Natural pozzolans have been widely used as substitutes for Portland cement, because of their binding properties. Some of them are natural volcanic rocks which contain secondary minerals such as clays and zeolites corresponding to products of the alteration of the rock.
Habert, Guillaume +4 more
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Massive Volcanic Glass: Natural Pozzolan in the West of São Paulo State [PDF]
Geologia USP. Série Científica, 2011 Some occurrences of massive volcanic glass have been recorded in the western region of São Paulo State duringgeological mapping and prospecting and technological characterization of pozzolanic materials.
Tarcísio José Montanheiro +4 more
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Modifications induced by adding natural zeolitic pozzolans to cement paste
Materiales de Construccion, 2005 Volcanic pozzolans owe their pozzolanic activity chiefly to the presence of vitreous or zeolitic material rich in SiO2, and Al20y compounds that react with the portlandite produced during cement hydration to generate amorphous gels with cementitious ...
M. T. Blanco-Varela +3 more
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Advances in Civil Engineering, 2021 The effectiveness of mine backfilling depends on the properties of its constituents. The high cost of cement, which is commonly used as a binder in mine backfill, has led researchers to seek alternatives to partially replace it with other binders.
Mohammed Hefni, Maaz A. Ali
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Heats of hydration and pozzolan content of portland-pozzolan cements
Journal of Research of the National Bureau of Standards, 1952 Methods are described for the measurement of the approximate heat of solution in acid of portland-cement^-pozzolan mixtures. Examples are given of the estimation of the heat of hydration of portland-pozz olan cements. Determinations of the amount of material undissolved in the calorimeter, as well as the heats of solution, were applied to the problem ...
E.S. Newman, L.S. Wells
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Analysis of thermal process of pozzolan production
Materiales de Construccion, 2004 The objective of this study was evaluated the effect of heat treatment parameters on the pozzolanic activity of natural kaolin clays. The experimental design included three factors: kaolin type, temperature and time.
R. Mejía De Gutiérrez +2 more
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Advances in Civil Engineering, 2021 Made up of an engineered mix of ordinary Portland cement (OPC) with artificial pozzolans such as trass, fly ash, and slag, the blended cements have been intensely employed within cementitious materials.
Ilker Ustabas +3 more
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Use of gypsum and bagasse ash for stabilization of low plastic and high plastic clay
Journal of Applied Research on Industrial Engineering, 2019 Clays have a tendency to undergo volumetric changes when they interact with water. These soils are a very common reason for most of the foundation failures due to their degraded properties.
Sadam Hussain Khan
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