Dehydration and Decomposition of the Hydration Products of Portland Cement during Electronmicroscopic Observation
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Several cases of the dehydration and decomposition of cement hydration products, which occured during electronmicroscopic observation, have been discussed.<BR>1.Ca(OH)<SUB>2</SUB> and CaCO<SUB>3</SUB> change to CaO without remarkable deformation of electronmicroscopic figures.<BR>2.CaSO<SUB>4</SUB>⋅2H<SUB>2</SUB>O is dehydrated to CaSO<SUB>4</SUB>⋅ 1/2H<SUB>2</SUB>O and then CaSO<SUB>4</SUB>⋅CaSO<SUB>4</SUB> is decomposed by stronger irradiation of electrons, and rings corresponding to those of CaS and CaO appear in electron diffraction patterns.<BR>3.By the dehydration of hexagonal plates of calciumaluminate and ferrite hydrates, the internal structures disintegrate to amorphous state without appreciable change of their external shapes, and a metastable intermediate state is conceived from the change of electron diffraction patterns.
- 公益社団法人 日本顕微鏡学会の論文
公益社団法人 日本顕微鏡学会 | 論文
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