Hazardous-waste Containers In
Cementitious Materials:
Leakage Test On Small-scale Specimens And
On Full-scale Prototypes
Author(s)
A. Taglioni, A. Castellani & P. De Stefanis
Abstract
A modular system for containment of nuclear waste packages based on two
barriers of cementitious materials was designed for a repository of radioactive
substances, and then investigated in order to test leachability in a period of time
of 300 years. Cement agglomerates designed for the isolation of dangerous waste
exhibit low permeability, hence a favourable durability, that appoints them as
proper material for construction of hazardous waste in general, i.e. toxic,
medical, or radioactive waste. Characterisation of suitable concrete mix design
has been attained through leakage tests, carried out on a concrete slab 300×300
mm wide. Four full-scale prototypes of the system were then built from the same
concrete mix, and were submitted to a test of waterproofing at a laboratory.
Experimental evidence on two weak points has been collected. One, of a general
character, is related to the almost unavoidable presence of \“construction joints”,
a second weak point is related to non-homogeneity of concrete. Then two
different design procedures were suggested.
Keywords: disposal, concrete leakage, dangerous waste, radioactive waste.
1 Introduction
Over the last decades, the role of cementitious materials has developed from
structural building materials to comprise cement-based matrices providing
environmental control of hazardous contaminant release.
Keywords
disposal, concrete leakage, dangerous waste, radioactive waste.
Related Book
Other papers in this volume
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