Abstract

Various refractories have been exposed in pure steam and other atmospheres at pressures up to 1000 psia for 10 days with the flexural strength being measured before and after exposure. Cement-bonded castables and calcium aluminate cements were exposed to liquid water and saturated water vapor at 1000 psia. All the dense alumina castables had higher strength after exposure to either the saturated vapor or the liquid than their controls. This result has been attributed to the formation of additional bonding phase(s). Other measurements on these specimens are reported. Chemical reactions are proposed to explain the results. (LTN)

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