| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for estimating the compression strength of cement mortar with high precision by simple operation. <P>SOLUTION: The method for estimating the compression strength of the cement mortar is composed of a sample forming method, a hydration ratio calculation process and a compression strength estimation process. The hydration ratio calculation process contains even a method for estimating the compression strength of the cement mortar for calculating the hydration ratio of hydraulic particles by substituting the area ratio of non-hydrated hydraulic particles, which is calculated from the reflected electron image of a cement paste cured body, for the following formula: R<SB>t</SB>=ä1-(S<SB>i</SB>-S<SB>t</SB>)/S<SB>i</SB>}×100 wherein R<SB>t</SB>is the hydration ratio (%) of the hydraulic particles of a material age t-th day and S<SB>i</SB>is the area ratio (%) of the non-hydrated hydraulic particles the hydration ratio of which is zero, S<SB>t</SB>is the area ratio (%) of the non-hydrated hydraulic particles of the material age t-th day. Further, this method includes even a method for estimating the compression strength of the cement mortar having the blast furnace cement. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
