yes,we can use stone dust as a filler material for bituminous concrete because of its good bonding power with the bitumen.
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yes, concrete is man made, stone is naturally ocurring.
The "Richmond Bridge" London, England. The design is a stone arch bridge constructed of Portland stone, construction started 1774 and completed 1777.The "Richmond Bridge" Richmond, Tasmania. The original name was "Bigge's Bridge and was constructed of sandstone, construction started in 1823 and completed in 1825.
concrete, or the key stone (stone in middle of an arch construction)
cement
160 mm -200 mm