Related Experiment Video
Updated: Aug 8, 2026

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
Published on: February 21, 2017
Efficiency of fly ash belite cement and zeolite matrices for immobilizing cesium
S Goñi1, A Guerrero, M P Lorenzo
1Instituto de Ciencias de la Construcción Eduardo Torroja, CSIC, C/Serrano Galvache, 4, 28033 Madrid, Spain. sgoni@ietcc.csic.es
Abstract:
The efficiency of innovative matrices for immobilizing cesium is presented in this work. The matrix formulation included the use of fly ash belite cement (FABC-2-W) and gismondine-type Na-P1 zeolite, both of which are synthesized from fly ash of coal combustion. The efficiency for immobilizing cesium is evaluated from the leaching test ANSI/ANS 16.1-1986 at the temperature of 40 degrees C, from which the apparent diffusion coefficient of cesium is obtained. Matrices with 100% of FABC-2-W are used as a reference. The integrity of matrices is evaluated by porosity and pore-size distribution from mercury intrusion porosimetry, X-ray diffraction and nitrogen adsorption analyses. Both matrices can be classified as good solidify systems for cesium, specially the FABC-2-W/zeolite matrix in which the replacement of 50% of belite cement by the gismondine-type Na-P1 zeolite caused a decrease of two orders of magnitude of cesium mean Effective Diffusion Coefficient (D(e)) (2.8e-09 cm(2)/s versus 2.2e-07 cm(2)/s, for FABC-2-W/zeolite and FABC-2-W matrices, respectively).
More Related Videos
Related Concept Videos
Pozzolans
Fly ash is a...
Hydration of Cement
Additives and Fillers in Concrete
The...
Transition Zone
Types of Cement II
Accelerators
The effectiveness of calcium chloride can...

