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Chemical characterization of hydrothermal hot-pressed calcium aluminate-phosphate-silica cement
This paper describes another effective use of calcium aluminates in producing a high performance material. The material essentially consists of a calcium aluminate, a phosphate and a siliceous powder and it is fabricated by a hydrothermal hot press method. The solidified bodies exhibit a high strength, especially for the system calcium hexa aluminate, sodium or potassium meta phosphate and silica fume (CAPS). It is necessary to use crystalline calcium hexa aluminate and silica together with phosphate for preparing a high strength body. Similar to crystalline calcium hexa aluminate, the other crystalline alkali earth metal hexa aluminates, such as SrAl12019 and BaAl12019 also give a high strength. The strength of CAPS exhibits no strength degradation with time. Moreover, the thermal expansion of CAPS is very small below 500 deg C. The microstructure of caps is assumed to consist of crystalline alkaline earth metal hexa-aluminates embedded in a cementitious poly-anion network and it is free from large defects.
Chemical characterization of hydrothermal hot-pressed calcium aluminate-phosphate-silica cement
This paper describes another effective use of calcium aluminates in producing a high performance material. The material essentially consists of a calcium aluminate, a phosphate and a siliceous powder and it is fabricated by a hydrothermal hot press method. The solidified bodies exhibit a high strength, especially for the system calcium hexa aluminate, sodium or potassium meta phosphate and silica fume (CAPS). It is necessary to use crystalline calcium hexa aluminate and silica together with phosphate for preparing a high strength body. Similar to crystalline calcium hexa aluminate, the other crystalline alkali earth metal hexa aluminates, such as SrAl12019 and BaAl12019 also give a high strength. The strength of CAPS exhibits no strength degradation with time. Moreover, the thermal expansion of CAPS is very small below 500 deg C. The microstructure of caps is assumed to consist of crystalline alkaline earth metal hexa-aluminates embedded in a cementitious poly-anion network and it is free from large defects.
Chemical characterization of hydrothermal hot-pressed calcium aluminate-phosphate-silica cement
Sato, K. (author) / Pushpalal, G.K.D. (author) / Maeda, N. (author)
2001
11 Seiten, 5 Bilder, 5 Tabellen, 15 Quellen
Conference paper
English
Chemical Characterization of Hydrothermal Hot-Pressed Calcium Aluminate-Phosphate-Silica Cement
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