Patent ID: 8915995

Claim:
A coated material for a base layer or binder layer of a road or highway pavement, or for industrial, port, or airport platforms, or for a supporting layer for railroad tracks, wherein said coated material is composed of aggregate mixed with at least one hydrocarbon binder, wherein the aggregate represents more than 95% by weight of the coated material, and the hydrocarbon binder represents at most 5%, wherein the aggregate comprises a granular structure comprising several particle size fractions d/D, each particle size fraction being defined by a lower limit (d) and an upper limit (D), wherein the aggregate comprises a first particle size fraction d 1 /D 1 having as median a first median dm 1 , and a second particle size fraction d 2 /D 2 having as median a second median dm 2 , wherein the aggregate comprises a third particle size fraction d 3 /D 3 between the first and second particle size fractions, having as lower limit d 3 the upper limit D 1 of the first particle size fraction, and having as upper limit D 3 the lower limit d 2 of the second particle size fraction, wherein the third particle size fraction has a ratio (P 3 ) of its weight relative to the weight of the aggregate, wherein the width of the third particle size fraction D 3 −d 3 , defining a relative width (D 3 −d 3 )/D 2 in relation to the upper limit (D 2 ) of the second particle size fraction, said relative width being greater than 20% of D 2 , wherein the ratio of the weight ratio (P 3 ) of the third particle size fraction and its relative width is less than 0.4, which is: P ⁢ ⁢ 3 ( D ⁢ ⁢ 3 - d ⁢ ⁢ 3 ) / D ⁢ ⁢ 2 ⩽ 0.4 by means of which the number of contacts between the particles of the second particle size fraction d 2 /D 2 is maximized, wherein the coated material comprises, after compacting, a void content of less than 10%, wherein the hydrocarbon binder is a hydrocarbon binder modified by inclusion of polymers and/or oil, and/or treated by blowing and/or treated by foaming or by emulsion, by means of which the modulus of rigidity of the coated material, once compacted, is greater than 9000 MPa at a temperature of 15° C. and at a frequency of 10 Hz, and the fatigue resistance of the coated material, once compacted, is greater than 90 microstrain at a temperature of 10° C. and at a frequency of 25 Hz.