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Macro and Micro Observations on Mortar Alteration Mechanism Under the Various Solution Conditions

Published online by Cambridge University Press:  15 February 2011

A. Fujiwara ,
S. Tashiro ,
T. Takemura ,
K. Sakogaichi ,
S. Yokomoto  and
K. Katsuyama
A. Fujiwara
Affiliation:
Radioactive Waste Management Center, 2–8–10 Toranomon, Minato-ku, Tokyo, Japan
S. Tashiro
Affiliation:
Radioactive Waste Management Center, 2–8–10 Toranomon, Minato-ku, Tokyo, Japan
T. Takemura
Affiliation:
Mitsui Mining & Smelting Co., 2-1-1 Muromachi Nionbashi, Chuo-ku, Tokyo, Japan
K. Sakogaichi
Affiliation:
Mitsui Mining & Smelting Co., 2-1-1 Muromachi Nionbashi, Chuo-ku, Tokyo, Japan
S. Yokomoto
Affiliation:
Mitsui Mining & Smelting Co., 2-1-1 Muromachi Nionbashi, Chuo-ku, Tokyo, Japan
K. Katsuyama
Affiliation:
National Institute for Resources and Environment, Tukuba-shi. Ibaraki, Japan
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Abstract

Accelerated aging tests have been conducted to evaluate the long-term durability of cementitious material against aggressive ions. In tests, cementitious specimens were immersed in the solutions containing concentrated aggressive ions at high temperature and it promoted diffusion of the ions in the specimen. This method would be suitable for the evaluation on the aging as the alteration of the specimen would be expected to resemble the natural behavior. This paper presents a classification of alteration mechanism in the immersion tests using MgCl2 and Na2SO4 solution. This classification was done by relating the changes of compressive strength to microscopic and mineralogical changes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 353: Symposium – Scientific Basis for Nuclear Waste Management XVIII , 1994 , 899
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

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