Other oxysalt bonded cements

In a similar way there has been a passing reference to a cobalt oxychloride cement (Prosser et ai, 1986). No explicit details of the fabrication or chemical behaviour of this material were provided, but the ingredients were listed among series of acids and bases for forming cements as agents for the sustained release of trace elements to grazing animals. The implication of this paper was that cobalt oxide would function as the base 

Adomavichiute, O. B., Yanitskii, I. V. Vektaris, B. I. (1962). On the hardening of magnesium cement. Zhumal Priklandnoi Khimii, 35, 2551-4. 

Aspelund, H. (1933). Basic salts of bivalent metals II. Acta Academiae Aboensis, 7 (6), 1-25. 

Beaudoin, J. J. Feldman, R. F. (1975). Mechanical properties of autoclaved calcium silicate systems. Cement and Concrete Research, 5 (2), 103-18. 

Beaudoin, J. J. Ramachandran, V. S. (1975). Strength development in magnesium oxychloride and other cements. Cement and Concrete, 5 (6), 617-30. 

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Oxychloride cements have several phases, the main one being an oxysalt. Single-phase oxysalts are very insoluble in water and, hence, are suitable for outdoor applications such as structural materials. In practice, however, synthesizing single-phase materials has been difficult. Chlorides and sulfates are also produced as secondary phases, making these cements leachable in water. For this reason, their use has been limited. That does not, however, imply that their potential is limited. If some niche application of these materials is found as in the case of phosphate bonded ceramics, chances are that several other oxysalt cements may be discovered the same way as phosphate bonded ceramics described in this book. 

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