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Spectrophotometric method for estimating the reactivity of pozzolanic materials
Advances in Cement Research, 1988Synopsis A spectrophotometric method is described for estimating the reactivity of pozzolanic materials. The method consists of boiling the pozzolana in 0·5 N NaOH solution for 3 min and estimating the alkali-soluble silica by spectrophotometry.
M. S. Surana, S. N. Josh
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An overview on the activation of reactivity of natural pozzolans
Canadian Journal of Civil Engineering, 2001Natural pozzolan is one of the oldest construction materials. Lime-pozzolan cements have been used for several thousands of years and have an excellent reputation for their durability. Pozzolans are being widely used as a cement replacement in Portland cement concrete.
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Reactivity of lime Activated Pozzolans
SP-202: Third Canmet/ACI International Symposium: Sustainable Development of Cement and Concrete, 2001This paper utilizes electrical methods to follow the early hydration characteristics of a range of materials activated with calcium hydroxide at room temperature (20 degrees C). The electrical response is measured in terms of the in-phase (i.e. resistance) and quadrature (i.e. capacitance) components of the sample admittance.
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Characterisation of Fly Ash and Relevance of Pozzolanic Reactivity
Advanced Materials Research, 2011ABSTRACT It is a very well known fact that the use of fly ash in masonry and concrete make the structures durable. Properties of Fly Ash depend upon coal source. For acceptability of fly ash in cement, mortar and concrete various specifications and standards are available.
Anant M. Pande +2 more
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Pozzolanic reactivity of silico-aluminous fly ash
Particuology, 2008Abstract For some years it has been possible to control the particle size of fly ashes, by-products of thermal power stations. Incorporating these very fine particles (obtained by grinding and/or pneumatic selection) improves the physical–mechanical characteristics of mortars and concretes.
Pierre Adamiec +2 more
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Estimating reactivity of pozzolanic materials by a spectrophotometric method
Advances in Cement Research, 1990Following earlier work on estimating the reactivity of pozzolanic materials, three classes of pozzolanas have been further investigated, to ascertain whether or not a more linear calibration curve is possible. A better linear correlation exists when separate calibration curves between absorbance and lime-pozzolana mortar strength values for different ...
M. S. Surana, S. N. Joshi
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Influence of Mineral Impurities on the Pozzolanic Reactivity of Metakoalin
2015In nature, kaolinite deposits are rarely completely pure. In addition to the mineral kaolinite other clay minerals such as smectites and illites, but also non-clay minerals such as quartz, feldspar, calcite and muscovite are often present in the clay.
Sofie Hollanders +2 more
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Properties and pozzolanic reactivity of flash calcined dredging sediments
Applied Clay Science, 2016Abstract Dredging of ports, harbours and waterways generates vast amounts of sediments that find few applications and need to be disposed of. In the port of Antwerp, Belgium, each year 450,000 t (dry matter) of dredging sediments are mechanically dewatered and stockpiled. This paper investigates flash calcination of the clay-rich dredged sediments as
Ruben Snellings +7 more
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The influence of particle size on the pozzolanic reactivity of quartz powder
Powder Technology, 1999Abstract Materials with cement-based matrices represent a class of materials notable for their wide and plentiful use. Up to the present, component reactivity was closely linked to the material's vitreous characteristics. The question we wanted to find an answer to was: is the pozzolanic reaction one which is specific to vitreous materials? To tackle
J.C. Benezet, A. Benhassaine
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Mineralogical effect on the pozzolanic reactivity of a Mexican lacustrine soil
Construction and Building Materials, 2010Abstract Clay minerals have been used as natural pozzolans with the aim of reducing CO 2 emissions, and densifying the matrix with hydration products in pastes and mortars. This study assesses the pozzolanic reactivity of a natural lacustrine material in its natural and thermally-treated states.
Jacobo Martinez-Reyes +3 more
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