Mastic asphalt composition for production of surfacings

A mastic asphalt composition comprising:

• (i) 5% to 20% by weight of a composition comprising at least:
• a binder base chosen from:
• a bitumen base,
• a pitch base,
• a clear binder, or
• a mixture of one or more of these binder bases,
• an acid compound of general formula (I):
• R—(COOH)z (I)
• wherein R represents a linear or branched, saturated or unsaturated chain comprising from 4 to 68 carbon atoms and z is an integer ranging from 2 to 4,
• an amide compound of general formula (II):
• R′—(NH)nCONH—(X)m—(NHCO)p(NH)n—R″ (II)
• wherein:
• the R′ and R″ groups, which may be identical or different, represent a saturated or unsaturated and linear, branched or cyclic hydrocarbon-based chain comprising from 1 to 22 carbon atoms which optionally comprises heteroatoms, C5-C24 hydrocarbon-based rings and/or C4-C24 hydrocarbon-based heterocycles comprising one or more heteroatoms, and R″ may be H;
• the X group represents a saturated or unsaturated and linear, cyclic or branched hydrocarbon-based chain comprising from 1 to 22 carbon atoms which is optionally substituted and which optionally comprises heteroatoms, C5-C24 hydrocarbon-based rings and/or C4-C24 hydrocarbon-based heterocycles comprising one or more heteroatoms;
• n and m and p are integers having a value of 0 or 1, independently of one another, and
• the compounds (I) and (II) are present in a weight ratio ranging from 10:1 to 1:16, and
• (ii) 15% to 40% of fines,
• (iii) from 15% to 45% of sand,
• (iv) from 10% to 45% of stone chippings,
• wherein fines, sand and stone chippings are named aggregates, the percentages being expressed by weight relative to the total weight of the composition.