Free CaO S
Source: From OECD, Use of Waste Materials and Byproducts in Road Construction, Organization for Economic Co-operation and Development, Paris, 1977.
composition that when ground to proper fineness, they may also react directly with water to form hydration products that provide the slag with cementitious properties.
There is some evidence that nickel slag can be involved in the corrosion of iron and steel in the presence of moisture (probably galvanic corrosion). In Canada, where nickel slag is used in fill applications, it is common practice to provide a layer [typically 150 mm (6 in.) thick] of natural aggregate between ferrous materials and the slag.21
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