FR2481264A1 - Coating compsn. for road marking, sports ground, etc. - comprising slag granules, hydrated chalk and resin binders - Google Patents

Abstract

Coating compsns partic for road surfaces or other industrial or sport grounds comprises 80-95% granules, 0-10%, hydrated chalk and 5-20% of a binder comprising 33-36% synthetic resin obtd from steam-cracking fractions by thermal and/or catalytic polymerisation, (b) 51-56% opt chlorivated hydrocarbon solvent and (c) 16-8% of an extra strong resin which is a fine resin distn fraction. The compsn is used for marking road surfaces e.g. for patterns or signs. The compsn uses slag granules which are by-products of the metallurgy industry. These granules contain 5-10% free chalk so that addition to chalk as such to the compsn is unnecessary. The compsn sets at ambient temp by virtue of the basic elements in the slag.

Description

The present invention relates to a composition of
coating for roads5 industrial or sports floors, sidewalks, tracks, etc ..., which also allows the marking of traffic lanes
lation by color lines of discontinuous or continuous lines
or assemblies with different colors in order to achieve
decorative or signaling motifs.

Road pavements currently used are
generally prepared using a binder based on petroleum derivatives or coal tar and require hot mixing of the aggregates and the binder. However, this mixture at high temperature, of the order of a hundred degrees 5 is carried out on large masses of products and consumes large amounts of energy. In addition, it is necessary to have large heating facilities in the immediate vicinity of the places of use of the coating composition because the application of the reve- ration is done hot.

The present invention aims to overcome this disadvantage by providing a coating whose preparation
cold run.

 It thus relates to a coating composition for roads or other industrial and sports floors, characterized in that it comprises from 80 to 95% of aggregates. from 0 to 10% of hydrated lime and from 5 to 20% of a binder consisting of a) from 33 to 36% of a synthetic resin obtained from steamcracker slices by thermal and / or catalytic polymerization, b) from 51 to 56% of an optionally chlorinated hydrocarbon solvent and c) from 16 to 8% of an extra strong resin which is a distillation cup of pine resin.

 It is also possible to introduce in the composition from 0 to 10% of a suitable coloring agent, in place of a corresponding fraction of aggregates.

One of the original features of the composition according to the invention is to use slag granulates which are by-products of the iron and steel industry. These slags can be blast furnace slag, steel mill slag, such as steel
LD or any other steel by-product containing basic elements such as free lime, for example at 5 to 10%.

 These slags are in the form of sand and sand.

aggregates and are used in a granulometric distribution
suitable for the intended use, well known in particular in
road surfacing.

 Another originality of the composition according to the invention lies in the preparation and cold setting of the coating which is the result of the association of lime slags and a particular binder. In fact, this cold hold is due to the presence in the slags of basic elements such as free lime, which combine with the binder used to obtain the cold hardening.

 It should be noted that the use of slags containing a high proportion of free lime makes it possible to reduce and even eliminate the addition of lime to the composition. Thus, for example, steelmaking slags for which the free lime content can reach 8% make it possible to reduce the added lime content to a value of 0 to 2%. In the case of blast furnace slags, preferably 5 to 10% of hydrated lime is used.

 The binder according to the invention is a combination of three elements, namely a synthetic resin obtained from steam cracker slices, by thermal and / or catalytic polymerization, an optionally chlorinated hydrocarbon solvent and an extra strong resin which is a distillation slice. of pine resin.

The first constituent of this binder is a synthetic aliphatic resin such as a polyolefin resin,
The hydrocarbon solvent is a petroleum distillation cup such as the special gasoline A having the characteristics defined below or a chlorinated hydrocarbon solvent such as tri chloroethylene.

Special essence A
Saybolt color + 25 minimum
Density at 15 ° C = 0.690
Distillation Limit Starting point 620C
Ending point 93 C
Aromatic 1% maximum
Benzene 0, 2% maximum
1A copper blade
Sulfur 5 PPM maximum
Finally, the extra-strong resin is of the terpenes family and more specifically a distillation cup of the pine resin having a distillation point greater than 2500 ° C. and having the following characteristics:
Oil index 90 - 95
Saponification index approximately 70 mg of unsaponifiable KOH, approximately 65%
Density at 15,985 / 995
Freezing point ASTM + 10 C
Viscosity cut Ford (20 mm) 20 C not measurable
Diode diode Hanus, medium low 100
Viscosity E 100 "C 1565
Flash point AFNOR 128 G! (about)
AFNOR 1500C Combustion Point
The preferred coating compositions according to the invention have the following proportions.

For a black coating
Slag aggregates (0-10 mm) 87 to 93%
Binder 6 to 10%
Hydrated lime 0 to 3%
For a colored coating
Slag aggregates (0-14 mm) 83 to 85%
Binder 6 to 10%
Hydrated lime 0 to 3%
Dye enpoudre (ocher or
iron oxide for example) 0 to 8%
The coating composition according to the invention is prepared cold by mixing the various constituents in a suitable mixer such as a concrete mixer.

This preparation can be carried out easily on construction sites, then the composition prepared on the surface to be coated is applied in a layer of desired thickness, for example 2 to 10 cm and rolled.
The drying and setting of the coating take place in a few hours or days depending on the thickness and temperature.

 The coating thus produced is very resistant to abrasive wear and its surface remains non-slip. In addition, the coating remains hard even under the effect of heat and does not exhibit the phenomenon of softening or suintage of the surface layer which makes it fluid and slippery and causes a depression of the aggregate contributing to remove the surface roughness of the coating.

 Finally, due to the increase of the softening point and the melting point of the coating, the aggregates can not be torn off as is the case in hot weather for conventional road surfaces, which is dangerous by the projections of aggregates which are thus provoked.

 The results of tests carried out on coating compositions defined below are given by way of illustration of the advantages and characteristics of the present invention.

EXAMPLE 1
A binder having the following weight composition is used to prepare the roadway coating composition according to the present invention.
- Synthetic resin (polyolefin resins
clear nudes) 34%
- Extra-strong resin (distilla cup
pine resin) 13%
- Solvent (special essence A) 53%
Clear polyolefin resins have the following characteristics
Molar mass 1000/1200
- Ball softening point
ring 100/1200 C
- Color GARDNER 6/7
- Color stability GARDNER
after 3 hours at 1500C 11/12
after 16 hours at 1500C 13/14
- Acid number
(mg - KOH)
- Saponification index
(mg - KOH) <1
- Bromine index
(mg / g) 150
- Flash point 285 "C
- Flash point 300 "C.

This binder is mixed in a concrete mixer with an LD steel slag and hydrated lime in order to obtain the following proportions by weight
- Dairy 0/4 mm 91.4%
- Dry lime dry 1, 6%
Binder 7, 0%.

 The 0/4 mm slag is an LD steelmaking slag containing 10% filler (particle size less than 80%) and 2% to 3% moisture, 0 / 4mm meaning that the particle size is continuous between 0 and 4mm. .

 Mechanical strength tests are then carried out on a 4 × 4 × 16 cm parallelepipedal test piece obtained by molding the previously prepared composition and dried at ambient temperature, the demolding taking place after 1/2 hour.

Density 2, 50 g / cm3
Resistance after 7 days of
aging in the air
- Traction: 3.4 M.Pa - Compression: 15> 0 M. Pa
EXAMPLE 2
Using the same binder as in Example 1 with a steel mill LD of continuous grain size 0/4 mm, containing 10% filler and 1% moisture, and slaked lime in the proportions given herein. below, a composition is prepared analogously in order to subject it to mechanical strength tests.

Dairy 0/4 mm 88, 5%
Dry lime dry 1, 5%
Binder (analogous to Example 1) 10, 0%
Mechanical resistance results
only on DURIEZ test specimen
Density: 2.60 g / cm3
Resistance in compression: 18.5 Pa
EXAMPLE 3
In this coating composition is used a discontinuous slag formula, namely a slag containing aggregates of 0 to 4 mm and 6 to 10 mm, the moisture content being 1%.

The composition is as follows
Dairy 0/4 mm (containing 9% filler) 43, 4%
Dairy 6/10 mm 48, 5%
Dry lime dry 1, 4%
Binder (analogous to Example 1) 6, 7%
Results on DURIEZ test-tube
- Density 2.73 g / cm
- Compressive strength 9, 0 M. Pa
EXAMPLE 4
The same composition is carried out as in Example 3, but using a slag containing no filler in the fraction 0/4 mm
The DURIEZ test results are as follows
Density 2.63 g / cm
Resistance in compression 11, 0 M. Pa
EXAMPLE 5
In this example, a continuous slag formula is produced in the range 0-10 mm, for a slag having a moisture content of 1%.

The composition is as follows
Dairy 0/4 mm
(containing 10% filler) 40, 8%
Dairy 4/6 mm 26, 2%
Dairy 6/10 mm 25, 3%
Dry lime 1.4%
Binder (analogous to Example 1) 6, 3%
The DURIEZ test results are as follows
- Density 2.73 g / cm
- Compressive strength 13.0 M, Pa
In general, on all the test pieces obtained in the preceding examples, no effect of immersion in water for 6 days is observed with regard to compressive strength.

 A test of the static punching resistances carried out with the aid of each of the cured specimens of the preceding examples made it possible to demonstrate that no depression is obtained for a 5 cm diameter punch subjected to a load of 5 M. Pa at temperatures ranging from 20 to 60 ° C, the charge being maintained for 4 hours.

Claims (8)

 1. Coating composition especially for roads or other industrial and sports floors, characterized in that it comprises from 80 to 95% of aggregates, from 0 to 10 II of hydrated lime, and from 5 to 20% of a binder constituted a) from 33 to 36% of a synthetic resin obtained from steamcracker cuts by thermal and / or catalytic polymerization, b) from 51 to 56% of an optionally chlorinated hydrocarbon solvent and c) from 16 to 8% of a extra strong resin which is a distillation cup of pine resin.  2. Composition according to claim 1, characterized in that it also comprises 10% of a coloring agent in place of a corresponding fraction of aggregates.  3. Composition according to any one of the preceding claims, characterized in that the aggregates are granules of blast furnace slag and the composition contains  5 to 10% hydrated lime.  4. Composition according to claim 1 or 2, characterized in that the aggregates are granules of steel slag LD and the composition contains 0 to 2% hydrated lime,  5. Composition according to any one of the preceding claims, characterized in that the synthetic resin is a polyolefinic resin.  6. Composition according to any one of the preceding claims, characterized in that the solvent is a special gasoline A or trichlorethylene.  7. Composition according to any one of the preceding claims, characterized in that the extra-strong resin has a distillation point greater than 2500C and can be defined by the following characteristics:  Oil index 90 - 95  Saponification index, about 70 mg of KOH In s ap apifiable about 65%  Density at 15,985 / 995  Freezing point A. S. T. M. + 10 C  Viscosity cut Ford (20 mm) 20 not measurable  Meth Iodine Index Hanus  low averages 100  Viscosity at 100 ° C 1, 65  AFNOR ignition point 128 "C approximately  AFNOR combustion point 150 "C.  the coating thus produced.  of the composition thus obtained on the floor to be coated and rolled  any one of claims 1 to 6, then applying a neck  that cold mixes the constituents of the composition according to  for roads or other industrial and sports grounds, characterized in that  8, Process for the preparation of a coating, in particular