ASTM C20用沸水法测定煅烧耐火砖和异型砖的表观多孔性,吸水性,表观比重及松密度的标准试验方法
日期:2012-02-10 11:10
ias was noted between formed 2 by 2 by 2in. (50 by 50 by 50mm) and specimens that were quartered from larger 9 by 4.5 by 2.5 (228 by 114 by 64 mm) cast specimens. Additionally, an error in the apparent porosity determination on castables was found whenever the specimens were heated to 1500F (816C) and then exposed to water as a saturation media (Test Method C830). The error was attributed to reactivity of cement with water and subsequent re-hydration of cement phases. The higher the cement level
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