Enhanced conductivity measurement techniques for evaluation of fly ash pozzolanic activity

By Jordi Payá, M. Borrachero, J. Monzó, E. Peris-Mora, F. Amahjour. 2001

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Effect of milling and acid washing on the pozzolanic activity of incinerator sewage sludge ash (2010, background): “Indirect tests involve the measurement of physical properties related to pozzolanic reactions such as compressive strength [3,9,10] electrical conductivity [5,11,12] or heat evolution by conduction calorimetry [13,14].”
Physical properties and reactivity of pozzolans, and their influence on the properties of lime–pozzolan pastes (2011, methodology): “The chemical method, in which changes in conductivity of a lime/pozzolan solution were measured over time [23, 24], depicted four phases of activity similar to the four stages defined by McCarter and Tran [25].”
Comparison of test methods to assess pozzolanic activity (2010, background): “This may involve measurement of properties such as compressive strength, electrical conductivity [7, 10, 11] or heat evolution by conduction calorimetry [12, 13].”
Pozzolanic activity of clinoptilolite: A comparative study with silica fume, fly ash and a non-zeolitic natural pozzolan (2010, methodology): “[9] was used for evaluation of early-age pozzolanic activity of GZ in comparison with other pozzolanic materials.”
The effect of nanosilica addition on flowability, strength and transport properties of ultra high performance concrete (2014, methodology): “In the study herein described, a method similar to the one proposed by Paya [25] was used to evaluate the pozzolanic activity of both nS and SF.”