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Report No.

Development of solidification techniques with minimised water content for secondary radioactive aqueous wastes in Fukushima, 4; Heat-treatment of phosphate modified calcium aluminate cement under open system

Garc$'i$a-Lodeiro, I.*; Jin, F.*; Irisawa, Keita  ; Meguro, Yoshihiro  ; Kinoshita, Hajime*

The present study investigates the effect of water loss during the curing of phosphate-modified CAC system at different temperatures (35$$^{circ}$$C, 60$$^{circ}$$C, 90$$^{circ}$$C, 180$$^{circ}$$C) in open systems. Experimental results indicate that these phosphate-based cements do not form the conventional CAC crystalline hydration products at these temperatures but provide structural integrity despite a significant amount of water loss. Hydroxyapatite was detected at temperatures $$geq$$60$$^{circ}$$C.



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