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.: Home > Nature and Science > 2012 > Volume 10 Number 5 > A. El- Dakroury and Mona S. Gasser

Effects of SF and Ilmenite on the Chemical, Mechanical and Radiation Behavior of Matrices Used as Solidification of Wastes

A. El- Dakroury and Mona S. Gasser
Atomic Energy Authority, Hot Laboratories and Center, 13759 Cairo Egypt
Abstract :

 Radioactive waste, arising from civilian nuclear activities as well as from defence-related nuclear-weapon activities, possesses a formidable problem for handling and protecting the environment to be safe is the present and in the future generations. Cement-based waste forms are among the most commonly used waste disposal and site remediation options. However, concrete knowledge of the processes controlling long-term performance of the waste forms is lacking. The aim of this work is to obtain solidified waste form products in compliance with the interim disposal regulations of radioactive waste. Concrete is commonly used as a biological shield against nuclear radiation. Concrete is an inorganic material consisting of cement, water, and aggregates. The quality of any concrete depends on the quality of the paste and aggregate and the bond between them. Different concrete mixes were designed of different concentrations of ilemenite(10% to 60% volume )as fine and coarse aggregate mixed with silica fume (from 5% to 15%) and water-to-cement ratio of 40% . We have studied effects of different concentrations on compressive strength, bulk density, the effect of dose gamma ray to investigate on resistance of concrete to radiation, and the leaching of radioactive wastes (Cs-137). Test results revealed the compressive strength and shielding of the concrete to increase with the growth of coarse ilemenit increase; while, the leaching of waste appears decrease as silica fume use as mineral admixture .

Keywords :
Heavy weight high strength Concrete, Ilemenite, aggregates ,radiation shielding , silica fume , gamma dose , concrete radiation shielding

Date Deposited : 16 May 2016 20:43

Last Modified : 16 May 2016 20:43

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Volume 10, Number 5, - 2012 , ISSN 1545-0740

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