sable de concassage
The blen d of 8 0: 20 crushed as phalt:crusher dust was then mixed with t he addition of 2.5% foamed bitumen (B80), 1.5% cement and 2-3% water. [...] le mélange optimal devait se composer de 80% de granulat bitumineux et de 20% de sable de concassage (cf. Illustr. 27).
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