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Hydraulic Lime

An hydraulic lime is one which will set and harden under water. This property is common to several well-known materials used for constructional purposes, notably Portland cement. The power of setting and hardening under water in the case of hydraulic lime is due to the formation during the burning of the lime of certain chemical compounds of silica, alumina and lime, of which tri-calcic silicate (3CaO.Si02) is the chief. Other compounds such as di-calcic aluminate (2Ca0.A1203) and certain ferrites of limes are also formed, but these act only as fluxes and aid in the combination of lime and silica, and in themselves do not increase the hydraulic properties of the lime. Henry Pooley, Junr.

Author(s): Pooley, Henry

Keywords: lime;underwater;chemistry;manufacturing;properties;sutna lime;kunker lime