SK9902002A3 - Hot-setting bitumen-coated material containing rubber - Google Patents

Abstract

The inventive hot-setting bitumen-coated material is used for forming the top layer of a road and comprises a granular mixture with varying granulometry and a bonding agent in the form of a conventional bitumen or a modified bitumen. Said granular mixture contains chips, a sandy fraction and powdered rubber, said sandy fraction having a lower volume than the interstitial volume of the chips. According to the invention, the particles of powdered rubber are less than 1.5 mm in size and the percentage of rubber in the granular mixture is less than 1.5 %.

Description

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coated, heat-storing rubber-containing material for use in road construction. The invention also relates to a process for the production of the resin coated material and to a method for making pavements from the coated material.

BACKGROUND OF THE INVENTION

For many years, road coatings have been made of coated materials containing reclaimed rubber. An example is known from EP-A 0 672 791.

The addition of rubber to the resins enables improved properties of the coated materials, provides increased flexibility for the coatings formed, improves their resistance to fats and low temperatures, and reduces the noise and reflection of light sources. The use of reclaimed rubber also contributes to the removal of used tires of different origins.

Therefore, processes have been developed in which the rubber is mixed with the resin to form aggregates.

Granules having a size range of 1 to 3 or 2 to 4 mm, i.

-2 · ··························································· Rubber granules comparable to gravel grades (see, for example, U.S. Patent 5,548,962).

The formed pavement then exhibits, at least in some places, a rubber thickness of several millimeters between traditional granules or gravel. Because the rubber has an extremely low modulus of elasticity, such a thickness of rubber between traditional granules made of hard materials results in significant coating deformation when subjected to high local stresses such as that caused by truck traffic, and these considerable coating deformation leads to rapid degradation of the rubber.

To overcome this problem, the part of the sand fraction that usually accompanies the gravel is replaced by powdered rubber, the particles of which have a mean diameter of 0 to 1.5 mm. A resin binder, which can be a pure resin or a resin modified with additives, often polymers, is then added to the granular skeleton so formed.

The latter technique is in principle satisfactory. However, further improvement of road resistance is sought, for example, for applications in parking areas where maneuvering with very small turning radii is frequent. In addition, the rubber is sensitive to moisture, which sometimes causes numerous disadvantages.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is an object of the present invention to provide a rubber coated thermosetting material containing rubber which does not have the above-mentioned disadvantages.

The resin coated material should also allow

-3 obtaining a road surface with good water drainage capacity and good sound characteristics.

This is accomplished by the hot-rolled resin-coated roadway material comprising a granular mixture with a discontinuous particle size distribution and as a binder resin. The granular mixture comprises gravel, sand fraction and powdered rubber, wherein the sand fraction and powdered rubber together have a smaller volume than the void volume in the gravel.

According to the invention, the particle size of the rubber powder is less than 1.5 mm and the rubber content in the granular mixture is less than

1.5% by weight.

To achieve good roughness, the total sand content (mineral sand and powdered rubber) should not exceed the volume of the gaps in the gravel, ie. about 30 to 40% of the total volume. Thus, powdered rubber is used at the expense of the sand fraction, but not in addition to the conventional sand fraction.

The invention also relates to the above features, considered individually or in any technically possible combination.

The binder of the anchor layer may be a pure resin, also called a conventional resin, or a modified resin, and in particular a pure resin emulsion or a polymer modified resin emulsion. Emulsions of elastomers may also be used, but not necessarily, because of their chemical affinity for rubber.

The particle size distribution of the rubber is chosen, similarly to the finest sand, 0/1 mm (90% of the particles are smaller in size).

-4to 1.0 mm, ie. the remainder of the rubber particles on a 1 mm mesh screen is less than 10% of the dry weight of the sample). This option allows the part of the sand constituting the granular resin shell to be replaced with rubber, while providing the desired characteristics of the coated material.

The rubber content of the granular mixture is in the range of 0.5 to 1%.

The granular composition contains a gravel fraction, in addition to the sand fraction, gravel and rubber, a proportion of the rock dust (preferably limestone) of at least 1.5% of the total weight of the granulate.

This rock dust, also called a filler, is characterized in that 90% of its weight passes through a sieve with a mesh size of 80 µm.

The particle size distribution of the granular mixture is determined by calculating the volume fractions of the granular mixture.

In practice, it is necessary to take into account the considerable difference in density of the various components of the granular composition, i.e., in the composition. gravel, sand fraction and rubber, the particle size distribution must therefore be expressed in fractions by volume rather than by mass fractions if a good image of the particle size distribution is desired.

The volume fraction Vj of each component i of the granular mixture is calculated according to the following equation:

V _i = 100P _i / p _i L _i (P _i / p _i ) where

Pi is the mass fraction of component i, pi is the actual density of component i.

The particle size distribution of the granular mixture is calculated according to the following equation:

Bj ^ LiCij.Vin / 100 where

Bj is the unsatisfactory proportion of the mixture in percent by volume passed through the sieve j,

Ajj is the subtractive fraction of the component i in percent by weight through the sieve j.

The L content of the resin component, i. the weight fraction of the resin component and the total weight of the coated material is calculated from the modulus K of the binder content, the conventional surface area Σ and the coefficient, and to correct the actual component density, using the following equation:

L = Ka ⁵ ^ where

K is a value in the range of 3.5 to 4.5 and is 2.65 / pi

Σ is defined by 100L = 0,25G + 2,3S + 12s + 135f + 450KU with weight ratios

-6 · ······························· · · · · ···················

G particles larger than 6.3 mm

S particle size from 6.3 to 0.315 mm with particle size from 0.315 to 0.08 mm f particles smaller than 0.08 mm

KU rubber particles.

The KU weight ratio takes into account the specific absorbency of the rubber relative to the limestone filler; while the absorbency of the limestone filler is 50 g (net weight per 15 g of resin), it has the same absorbency of 15 g of rubber. Thus, the rubber absorbs 50/15 = 3.33 times more resin than the filler.

The modulus of binder content is preferably 3.8 to 4.2.

The resin content is preferably 4 to 14 wt.

Tables I and II represent the two results of the calculations, ie. two reconstructions of the resin coated coating compositions of the invention with gravel having a particle size distribution of 0/10 and containing 1% and 2%, respectively. 1.5% rubber.

Rubber is a porous material and moisture adheres deeply in its structure as soon as its content becomes significant. The natural moisture content of the rubber after manufacture is low, generally less than 0.5%. This amount is acceptable for the production of a sound-absorbing coated material, it should not be higher than 1% by weight.

The rubber usually moistens during packaging, transport and especially storage. Especially during storage of the coated material at the place of its production is

difficult to protect bags with rubber. The result is an increase in its humidity in case of rain.

It has been found that the addition of a certain amount of resin to the rubber, about 1 to 15% of its weight,

Λ ability of the rubber to absorb water to a depth. The presence of resin around the rubber particles makes them water resistant.

Improvement of the properties of the powdered rubber can be easily achieved by pretreating the powdered rubber, i. by spraying resin on powdered rubber at the end of the production line. It is sufficient to pass the freshly made powdered rubber through a chamber where the resin is sprayed (micronized) at a temperature of about 150 ° C.

The moisture content is measured by the oven drying method according to NF P 94 050.

The rubber powder thus treated is then used in a conventional manner. The amount of resin already integrated into the powdered rubber must be taken into account and corrected for the amount of resin in the coating material composition.

The behavior of coated material on the road in the presence of water must be verified. A methodology for verifying the mechanical behavior of the mixture in the presence of water is established. This methodology consists in carrying out two partial tests:

(a) a classical Duriez test which requires a dip / compression value greater than 0.85, preferably greater than 0.90, a value greater than 0.75 or 0.80 being considered sufficient for conventional coated materials.

• ·········································· ·· ···· _J. ··· ·· ........

(b) wear test CANTABRO (Spanish NLT v

352/86, a method introduced in Spain for drainage coated materials), modified in that the drum speed, the so-called. "Los Angeles" were raised from 300 to 500, and the temperature was maintained at 18 ° C. Under these conditions, the weight loss of the test specimens of the coated material to be tested shall be less than 10% of the original weight of the coated material.

The coated material is applied as a thin carpet on the road, the layer thickness being 1.5 to 4 cm, preferably 2.0 to 3.0 cm for a 0/6 particle size distribution, and 2.5 to 3.5 cm for a distribution particle sizes 0/10.

The invention also relates to a process for the production of a thermosetting coated material for the production of pavements comprising a granular mixture with a discontinuous particle size distribution and as a binder a conventional resin or modified resin, the granular mixture comprising gravel, sand fraction and powdered rubber, the method comprising the step of bringing the gravel and sand fraction to the coating temperature and mixing them with a binder to form a resin coated material.

According to the invention, the rubber powder is added in an amount of less than 1.5% by volume of the granular composition, the particle size of the rubber powder being less than 1.5 mm.

Since the rubber is sensitive to very high temperatures, especially in the presence of a flame, it is introduced at the production line where the granulate has already reached the desired coating temperatures.

In addition, in any process for the production of resin

-9 • ·················································· of the coated material, the small particle size and the resulting low weight must be taken into account when adding the rubber. For both of these properties, rubber is a material that can be entrained by the air flow during the drying process. To compensate for these disadvantages, the rubber is introduced immediately before the end of the gravel and sand fraction drying zone.

The invention also relates to the following features, considered individually or in any technically possible combination.

In the case of the production of coated material by means of a discontinuous device, the regenerated rubber is fed into the mixer in heat-sealable bags continuously at the bottom of the hot conveyor.

In the case of the production of coated material by means of a continuous device connected to a metering hopper which allows the granulate to be fed to the bottom of the hot conveyor, this hopper is used.

In the case of producing coated material using a continuous device with a separate mixer, the regenerated rubber is fed to the mixer at the bottom of the hot conveyor at the end of the drying process.

In the case of the production of coated material by means of a continuous device with a mixing device integrated with the drying drum, a metering feed chamber is necessary, allowing the introduction of rubber at the end of the mineral particle drying process in the recycling circuit. If this is not possible, a screw or pneumatic conveyor is used.

• ··········································· · · ···· ··· ·· ·· ·· ·· ··

Two alternatives are possible to ensure that the moisture content of the powdered rubber does not exceed 1% by weight. According to a first alternative, the moisture content of the rubber is measured before it is added to the mixer to the gravel / sand fraction mixture and, if necessary, the moisture content is adjusted. According to a second alternative, the above-described micronized rubber is used.

The invention further relates to a method of making a pavement from the resin coated material described above.

According to the invention, the method comprises the following steps: laying an anchoring layer on the road to be covered with a carpet, laying one layer of said resin coating material and compacting said resin coating layer.

According to a preferred embodiment of the invention, the laid resin coated material is compacted by a device other than a wheel compactor. The material to be coated must not adhere to the working surfaces of the compactor.

Further features and advantages of the invention are illustrated by the description of two embodiments of the coated material according to the invention and by one embodiment of the process for producing the resin coated material according to the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The production method of the invention is described with the aid of a single drawing showing a drum dryer-mixer and the elements necessary for introducing rubber.

- 11 • ············································································ · ·· ·· ··

DETAILED DESCRIPTION OF THE INVENTION

As can be seen from Tables I and II above, the resin coated material according to the invention comprises predominantly gravel of varying size, supplemented with a sand fraction, powdered rubber and resin. Tables III and IV represent two additional examples of compositions. The first example is resin coated material containing 1% rubber, referred to as coated material A, while the second example is resin coated material containing 2% rubber, referred to as coated material B.

The coated material A comprises a granular composition consisting of 95.5% mineral granular material, of which 78.5% has a 6/10 particle size distribution, while 17% has a 0/2 particle size distribution, and 1% a particle size rubber. 0/1. The rest (3.5%) is the filler.

To this mixture of granular material and rubber is added a modified resin. Its content is 6.6% by weight of dry granular material.

The resin coated material B differs from the coated material A in the content of various components. The mixture of granular material and rubber comprises 83% mineral granulate with a particle size distribution of 6/10 and 12% mineral granulate with a particle size distribution of 0/2. The rubber content with a particle size distribution of 0/1 is 2% and the filler content is 3%. The resin content is 6.6%.

Coated material A resp. B is produced at 165 ° C resp.

150 [deg.] C.

To illustrate the discontinuity of the particle size distribution

-12 ························································ Table IV shows the particle size distribution according to the standard P 18-560 of 6/10 and 0/2 mineral granules. Table IV further contains the numerical values of the above coefficients, i. the specific surface area Σ, the modulus of binder content K, the theoretical density of the granular material and the actual density Vi of the granular material.

The advantages of the resin coated materials of the invention are verified by carrying out conventional tests.

The results of these tests are shown in Table IV. These results show the compaction and compressive strength and the behavior of coated materials A and B in air and water.

Specific tests, such as the CANTABRO test, which allows determination of the weight loss of the stressed test specimen, and creep / relaxation tests were performed on coated A material.

The CANTABRO test practically consists of shaping cylindrical test pieces weighing approximately 1300 g, and then using them at a selected temperature of 18 ° C in a Los Angeles rotary drum. After the wear test, the weight loss of each test specimen is measured. The results shown in Table IV show better properties of the resin coated material of the invention than the other resin coated materials used previously.

in

Furthermore, noise measurements were carried out on various test sections corresponding to city streets and interurban roads.

• ·· ·· ···· 99 ·· · · · • • 9 • • ··· · · • • t · • • · · • • · • • ··· * · 8 « · · · ·

The method used is to compare two coatings with one another. For example, the original road coating and the new coating according to the invention or different coatings on the same road are compared. These measurements were carried out by a near-field measurement method consisting of measuring the noise generated by a moving light vehicle using a built-in microphone located near the wheel, away from the noise produced by the engine and the exhaust.

Thus, other noise sources located below are ignored when measuring driving noise (produced noise reduced by noise absorbed). This procedure makes it possible to characterize the coating, even in urban areas, independently of its surroundings.

This test was developed in the Laboratoire Régional de l'Est Parisien, where measurements were also taken, the results of which are given below.

The city has a reference speed of 50 km / h. Three sections were measured. The results are as follows:

Noise level 1 m from the wheel at 50 km / h site Original cover Roadway according to the invention improvement 1 90.20 dBA 83.5 dBA 6.7 2 88.56 dBA 83.58 dBA 4.98 3 90.14 dBA 83.52 dBA 6.62

The improvement is significantly greater than 4 dBA, corresponding to a noise reduction of more than 70%.

On the road section II. of class 0/10 was applied on a conventional resin concrete. However, the stretch passing through ·· ····

• · · · · ·.

• *** · *:. :

-14- .........

through the village was treated with coated material according to the invention.

Measurements on this type of test track were performed at a speed of 90 km / h.

skin Noise level 1 m from the wheel at 90 km / h Improvement of coated material Coated material according to the invention 93.6 dBA - New bituminous concrete 96.5 dBA 2.9 dBA Older bituminous concrete 98.1 dBA 4.5 dBA

The coated material according to the invention allows an improvement of more than 4 dBA over the older coating and 3 dBA over the new 0/10 resin concrete.

The production of the resin coated material according to the invention can be carried out in a discontinuous device or alternatively in a continuous device using a drum dryer-mixer, according to the example shown in the drawing.

In the apparatus associated with the tumble dryer-mixer, the resin coated material according to the invention is obtained in the following steps: dosing granular materials, adjusting by adding binder, drying these materials, dosing resin and adding resin to granules, adding rubber powder, mixing all these materials and dedusting the obtained resin coated material.

In the drum-mixer 1, the gravel / filler mixture is dried and then mixed with the resin from the binder container and the rubber

The rubber and resin are preferably added to the mixture by means of two lances 3, 4, whose outlet nozzles are arranged before the recycling ring 5, and mixed with all components of the resin coated material.

- 16

· · · · · · · · · · · · · · · · · · · · · ·

Table I

Recomposition by identification Example: coated materials 0/10, s' % rubber statement composition 6/10 NOUBLEAU 79% Specific surface 3.763 cm ^J / g Binder content module: 3,894 0/2 NOUBLEAU 17% Theoretical density: 2.554 g / cm Filler PIKETTY 3% M.V.R. aggregate 2.812 cm ³ / g Rubber 0/1 1% Binder COLFLEX N 6.20% Coating temperature 170 [deg.] C Particle size distribution by weight NF 18-560) Sito # lined 6/10 0/2 filling Rubber 0 (%) NOUBLEAU NOUBLEAU pickets 20 100.0 100.0 100.0 100.0 100.0 14 100.0 100.0 100.0 100.0 100.0 12.5 100.0 100.0 100.0 100.0 100.0 10 90.0 87.4 100.0 100.0 100.0 8 56.5 44.9 100.0 100.0 100.0 6.3 29.7 11.0 100.0 100.0 100.0 4 21.9 1.2 100.0 100.0 100.0 2 20.3 0.8 92.4 100.0 100.0 1 16.1 0.7 67.8 100.0 99.9 0.5 11.5 0.7 43.3 100.0 61.1 0,315 9.7 0.6 34.8 100.0 26.6 0.2 8.1 0.6 26.4 100.0 9.6 0.08 6.1 0.6 17.0 90.0 0.7 M. V. 2,812 2,856 1,000 2,820 2,700 1,000 1,000 R. g- ABOUT particle size distribution (NF P 18-560) Volume share 77.26 16.84 3.10 2.79 G (%) Sito # lined 6/10 0/2 filling Rubber 0 (%) NOUBLEAU NOUBLEAU pickets 20 100.0 100.0 100.0 100.0 100.0 14 100.0 100.0 100.0 100.0 100.0 12.5 100.0 100.0 100.0 100.0 100.0 10 90.3 87.4 100.0 100.0 100.0 8 57.4 44.9 100.0 100.0 100.0 6.3 31.2 11.0 100.0 100.0 100.0 4 23.4 1.2 100.0 100.0 100.0 2 22.1 0.8 92.4 100.0 100.0 1 17.9 0.7 67.8 100.0 99.9 0.5 12.6 0.7 43.3 100.0 61.1 0,315 10.2 0.6 34.8 100.0 26.6 0.2 8.3 0.6 26.4 100.0 9.6 0.08 6.1 0.6 17.0 90.0 0.7 M. V. 2,812 2,856 1,000 2,820 2,700 1,000 1,313 R. 2 Resin content by volume = 16.81%

- 17 · · · · · · · · · · · · · ···

Table II

Recomposition by identification Example: Coated materials 0/10, with 1.5% rubber statement composition 6/10 NOUBLEAU 79% Surface area: 15,428 cm ² / g Binder content module: 3,969 0/2 NOUBLEAU 17 Theoretical density: 2.532 g / cm % M.V.R. aggregate 2,797 cm ³ / g Filler PIKETTY 2.5 % Coating temperature 170 [deg.] C rubber 0/1 1.5% binder COLFLEX N 6.50 % Particle size distribution by weight JNF P 18-560) Sito # lined 6/10 0/2 filling Rubber 0 (%) NOUBLEA NOUBLEA pickets U U 20 100.0 100.0 100.0 100.0 100.0 14 100.0 100.0 100.0 100.0 100.0 12.5 100.0 100.0 100.0 100.0 100.0 10 90.0 87.4 100.0 100.0 100.0 8 56.5 44.9 100.0 100.0 100.0 6.3 29.7 11.0 100.0 100.0 100.0 4 21.9 1.2 100.0 100.0 100.0 2 20.3 0.8 92.4 100.0 100.0 1 16.1 0.7 67.8 100.0 99.9 0.5 11.3 0.7 43.3 100.0 61.1 0,315 9.3 0.6 34.8 100.0 26.6 0.2 7.6 0.6 26.4 100.0 9.6 0.08 5.6 0.6 17.0 90.0 0.7 M.V.R. g 2,797 2,856 1,000 2,820 2,700 1,000 1,000 ob distribution ^f bone particles (NF P 18-560) Volume share 76,59 16.69 2.56 4.15 G (%) Sito # lined 6/10 0/2 filling Rubber 0 (%) NOUBLEA NOUBLEA pickets U U 20 100.0 100.0 100.0 100.0 100.0 14 100.0 100.0 100.0 100.0 100.0 12.5 100.0 100.0 100.0 100.0 100.0 10 90.3 87.4 100.0 100.0 100.0 8 57.8 44.9 100.0 100.0 100.0 6.3 31.8 11.0 100.0 100.0 100.0 4 24.3 1.2 100.0 100.0 100.0 2 22.8 0.8 92.4 100.0 100.0 1 18.6 0.7 67.8 100.0 99.9 0.5 12.9 0.7 43.3 100.0 61.1 0,315 9.9 0.6 34.8 100.0 26.6 0.2 7.8 0.6 26.4 100.0 9.6 0.08 5.6 0.6 17.0 90.0 0.7 M.V.R. g 2,797 2,856 1,000 2,820 2,700 1,000 1,313 Resin volume fraction = 17.47 %

·· ····

- 18Table III

Comparison of two coated materials according to the invention with 1 and 2% KU

Grained material % KU % binder r / R The Quartzite Brix 2 6.6 0.84 3,669 Quartzite Brix 1 6.6 0.97 3.88 Quartzite Meilleraie 2 6.1 0.79 3.7 Quartzite Meilleraie 1 6.1 0.87 3,868 Diorit Noubleau 2 6.5 0.86 3,861 Diorit Noubleau 1 6.2 0.93 3,894 Sandstone Vaubadon 2 6.3 0.77 3.6 Sandstone Vaubadon 1 6.4 0.87 3,837 Quartzite Vignats 2 6.6 0.84 3.61 Quartzite Vignats 1 6.6 0.94 3,819 Porphyry Voutré 2 Ί 0.8 3,865 Porphyry Voutré 1.5 6.9 0.83 3,881 Porphyry Voutré 1.2 7 0.88 4,035

KU = rubber powder r / R = reduction coefficient in the Duriez test

K = modulus of binder content calculated by the process according to the invention. ······························

Table IV

Resin coated material (A) Resin coated material (B) composition 6/10 Brix 78.5% 83.0% 0/2 Brix 12.0% 0/2 Brix 17.0% filling 3.5% 3.0% rubber 0/1 1.0% 2.0% resin 60/70 6.60% 6.60%

DURIEZ (*) hydrostatic density 2.263 g / cm ³ 2.044 g / cm ³ density 94.5% 86.2% Rc (R) water 9,2 MPa 5.9 MPa Rc (r) air 8.9 MPa 4,9 MPa reduction coefficient r / R 0.97 0.84 absorbed water 1.5% 3.8%

CANTABRO (**) geol. density 89.1% hydro. density 93.7% wear% 9.3%

(*) Duriez-LCPC simple pressure test according to NF P98-251-1 (**) CANTABRO test according to Spanish standard NLT 352/86

-20Table IV (continued)

screen (mm) Resin coated material (A) Nutrient coated material (B) 20 100.0 100.0 14 100.0 100.0 12.5 100.0 100.0 10 93.6 92.5 8 56.9 51.9 6.3 29.5 24.0 4 22.7 18.1 2 19.6 16.0 1 15.4 13.1 0.5 11.8 9.8 0,3 15 9.6 7.8 0.2 8.1 6.6 0.08 5.9 5.3

Claims (10)

PATENT CLAIMS P P W) 2oo ;, CLAIMS 1. Resin-coated, heat-storage material for the production of pavements, comprising a granular composition with a discontinuous particle size distribution and as a binder resin, the granular composition comprising as components (i) gravel, sand fraction and powdered rubber, the rubber content of the granular material. % of the mixture is less than 1.5 wt.%, and wherein the sand fraction and the powdered rubber together have a smaller volume than the void volume in the gravel, characterized in that the particle size of the powdered rubber is less than 1.5 mm. Coated material according to claim 1, characterized in that the particle size of the rubber powder is less than 1 mm per 90% of the particles. 3. The coated material according to claim 1, wherein the powdered rubber content of the granular material is 0.5 to 1%. Coated material according to one of claims 1 to 3, characterized in that the particle size distribution of the granular mixture is calculated according to the equation: Bj ^ Aij.VOj / 100 where Bj is the undersize of the mixture in% by volume passed through the sieve j, Ajj, the undersize of the component i in percent by weight is passed through the sieve j, · · · · · ·· ·· ·· It knows the volume fraction of component i. Coated material according to any one of claims 1 to 4, characterized in that the L content of the resin component in the total weight of the coated material is calculated according to the equation: L = KaNz where K is the modulus of binder content with a value between 3,5 and 4,5, and is the correction coefficient of the actual density Vj of component i and Σ is the conventional specific surface area of component i, where Σ is defined by 100 Σ = 0,25 G + 2.3 S + 12 s + 135 f + 450 KU with weight ratios G particles larger than 6.3 mm S particle size from 6.3 to 0.315 mm with particle size from 0.315 to 0.08 mm f particles smaller than 0.08 mm KU rubber particles. 6. The coated material of claim 5, wherein the binder content module K has a value in the range of 3.8 to 4.2. A method of making a thermosetting coated coating material for the manufacture of pavements comprising a granular mixture with a discontinuous particle size distribution and a resin as a binder, the granular mixture comprising gravel, sand fraction and powdered rubber, the method comprising the steps of introducing gravel and sand fraction to the annealing temperature and mixing with the binder to form the resin coated material, characterized in that the rubber powder is added in an amount of less than 1.5% by volume of the granular composition, the particle size of the rubber powder being less than 1, 5 mm. 8. The process of claim 7 wherein the rubber powder is pretreated with the resin micronization and the amount of resin added during mixing is corrected for that amount. Method according to claim 7 or 8, characterized in that the moisture content is measured before the addition of the powdered rubber to the mixture of gravel and sand fraction, then adjusted, if necessary, to not exceed 1% by weight. A method of making a pavement from a resin coated material according to any one of claims 1 to 6 obtained by a process according to any one of claims 7 to 9, comprising laying an anchoring layer on the road to be covered by the carpet, laying one layer of said resin coated material and compacting the resin coated layer.