Crushing Concrete Pavement Hazards. Crushing Concrete Pavement Hazards. Concrete usually Portland cement concrete is a composite material composed of fine and . Aggregate consists of large chunks of material in a concrete mix generally a coarse gravel or crushed rocks such as lizenithne or granite along with. Chat Online.Name Concrete Mix Other Names Tradies Own Concrete Extra Strength Concrete Mix Extra Strength PRO-50 Concrete Mix Use Concrete Mix is used to produce concrete. Section 2 Hazards Identification Hazardous Substance. Non-dangerous Goods A low proportion of the fine dust in the supplied dry product will be respirable crystalline silica.