| http://www.w3.org/ns/prov#value | - Thus, it may be advantageous to use, as total or partial replacement for the siliceous sand, at least one pozzolan (or pozzolana) or a material capable of undergoing a pozzolanic reaction, this pozzolan or material being in particular chosen from aluminosilicates, calcium aluminosilicates and amorphous silica.
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