A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Experimental concretes for sealing radioactive-waste repositories in evaporite strata
AbstractRock fractions form a sequence of evaporite strata have been used as aggregate in cement-based composites, prepared to simulate materials for sealing a geologic repository for radioactive waste. Five types of coarse aggregate simulated mined-out backfill for normally mixed or preplaced-aggregate concrete. Geochemical properties of evaporite strata were considered in choosing the brine, rocks, and cement formulation for these experiments. Adequate values (>35 MPa) were obtained for compressive strengths of concrete cast with dolostone and anhydrite aggregate; these samples also had very low permeabilities to brine, 10−7 or 10−8 μm2 (darcy). Tests of samples with halite aggregate are promising. A strong bond apparently was formed between the grout and the various rocks, evidenced by breakage0 through aggregate particles in tests of compressive strength. From these experiments, acceptability criteria have been developed for simulated shaft-sealing composites.
Experimental concretes for sealing radioactive-waste repositories in evaporite strata
AbstractRock fractions form a sequence of evaporite strata have been used as aggregate in cement-based composites, prepared to simulate materials for sealing a geologic repository for radioactive waste. Five types of coarse aggregate simulated mined-out backfill for normally mixed or preplaced-aggregate concrete. Geochemical properties of evaporite strata were considered in choosing the brine, rocks, and cement formulation for these experiments. Adequate values (>35 MPa) were obtained for compressive strengths of concrete cast with dolostone and anhydrite aggregate; these samples also had very low permeabilities to brine, 10−7 or 10−8 μm2 (darcy). Tests of samples with halite aggregate are promising. A strong bond apparently was formed between the grout and the various rocks, evidenced by breakage0 through aggregate particles in tests of compressive strength. From these experiments, acceptability criteria have been developed for simulated shaft-sealing composites.
Experimental concretes for sealing radioactive-waste repositories in evaporite strata
Wakeley, L.D. (author) / Roy, D.M. (author)
Cement and Concrete Research ; 13 ; 97-106
1982-07-16
10 pages
Article (Journal)
Electronic Resource
English
Evaluation of concretes for high level nuclear waste repositories
| British Library Conference Proceedings | 2004