Effect of temperature on the leaching performance of a simulated cement-based immobilization system. Calcium and hydroxyl behaviour

descriptionPublicationkeyboard_double_arrow_right Article 01 Apr 1996 English Publisher:Elsevier BVJournal:Construction and Building Materials, volume 10, pages 171-177 (issn: 0950-0618,

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Authors: Goñi Elizalde, Sara; Hernández, M. S.; Guerrero Bustos, Ana María; Lorenzo García, M.ª Paz;

doi: 10.1016/0950-0618(95)00082-8

handle: 10261/215571

Effect of temperature on the leaching performance of a simulated cement-based immobilization system. Calcium and hydroxyl behaviour

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Abstract

Ca++ and OH- leaching at 20°C and 40°C have been studied by means of the ANSI/ANS-16.1-1986 test. Mixtures of a Portland cement (Type 1-35) and a synthetic boiling water reactor (BWR) evaporator concentrate solution were prepared at solution/cement ratios of 0.53 and 0.65. After a curing period of 28 days, the samples were submitted to leaching attack in de-ionized water. Monitoring of leaching kinetics and analysis of the leached solid phases showed that the kinetics is controlled by diffusion. The degradation of the material over time is estimated from the calcium effective diffusivity.

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Keywords

Temperatures, Cement matrix, Leaching

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