EP0634526B1 - Procédé pour le traitement de surface d'articles à revêtir - Google Patents

Procédé pour le traitement de surface d'articles à revêtir Download PDF

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Publication number
EP0634526B1
EP0634526B1 EP94810402A EP94810402A EP0634526B1 EP 0634526 B1 EP0634526 B1 EP 0634526B1 EP 94810402 A EP94810402 A EP 94810402A EP 94810402 A EP94810402 A EP 94810402A EP 0634526 B1 EP0634526 B1 EP 0634526B1
Authority
EP
European Patent Office
Prior art keywords
composite
crack
profiling
profile
coated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94810402A
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German (de)
English (en)
Other versions
EP0634526A1 (fr
Inventor
Elmar Dr. Tschegg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hilti AG
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Hilti AG
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Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP0634526A1 publication Critical patent/EP0634526A1/fr
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Publication of EP0634526B1 publication Critical patent/EP0634526B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00—Details of pavings
    • E01C11/005—Methods or materials for repairing pavings
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00—Coherent pavings made in situ
    • E01C7/08—Coherent pavings made in situ made of road-metal and binders
    • E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
    • E01C7/14—Concrete paving
    • E01C7/145—Sliding coverings, underlayers or intermediate layers ; Isolating or separating intermediate layers; Transmission of shearing force in horizontal intermediate planes, e.g. by protrusions, by inlays

Definitions

  • the invention relates to a method for surface treatment of workpieces to be coated made of cementitious or bituminous or other materials, such as roads, airfields, bridge parts, etc., according to which the surface is roughened and cleaned before the coating is applied.
  • chemical treatment processes are also known which are used to roughen and partially remove the surfaces of components and workpieces to be coated.
  • Adhesion promoters are also used to increase the adhesion of the layers to be laid, which should, for example, increase the adhesive bond between old and new concrete.
  • the characterization of the adhesive properties of layers has so far mostly been carried out using the pull-off test.
  • a cylindrical test specimen is drilled perpendicular to the composite surface using a core drilling device right up to the composite material.
  • a steel plate of the same cross section is then glued onto the end face of the test specimen and the drill core is then pulled off in the axial direction by means of a tensile testing device. Since the adhesive strength is often weaker than the strength of the base material, cracking or separation usually occurs more or less in the bonded area. The maximum force required is measured, divided by the cross-sectional area and thus the adhesive tensile strength - as the only parameter - is determined.
  • the test device and associated test specimen shapes described in AT 390328 improved this situation.
  • This test facility is suitable for determining fracture mechanical parameters of materials and material composites.
  • This method eliminates the drawback disadvantages mentioned above.
  • the test method essentially consists of a wedge gap device.
  • the load displacement curve split force depending on the force displacement or crack or notch opening
  • the area under the load shift curve represents the fracture energy that was necessary to completely separate the test specimen.
  • the specific fracture energy G f is obtained .
  • the G f value is a material parameter and represents a measure of the resistance to crack propagation. Small G f values indicate “brittle” and high values indicate “ductile” material separation. On the basis of such a test, a distinction can now be made between brittle and ductile material separation. Furthermore, the maximum value of the force (F max value) can be taken directly from the load shift diagram. A "notch tensile strength" can be calculated from this value. This value is to be seen in a certain connection with the adhesive tensile strength (determined by the tear test).
  • the object of the invention is to eliminate the disadvantages of the low adhesion (characterized by the G F value) of material composites.
  • the object is achieved in that the roughness corresponds to half the maximum grain diameter of the surface to be coated or the surface layer to be coated and that the waviness corresponds to the largest grain diameter.
  • the waviness can be biaxial.
  • the shape of the ripple is expediently carried out according to a sine or triangular shape or according to a similar shape.
  • FIGS. 1 to 6 show the profile shapes carried out in the experimental studies for the design of the old concrete surface.
  • Figures 2 and 3 show sections through composite materials with triangular profile composite surfaces, with 1 the aggregate grains, 2 the crack pattern and 3 the composite surface.
  • FIGS. 4 and 5 show uniaxially corrugated composite surfaces 3 with a triangular profile (FIG. 4) and with a sine profile (FIG. 5).
  • FIG. 6 shows an example of a biaxially corrugated composite surface 3.
  • the old and new concrete composition was also varied with regard to the grain distribution or the largest grain of the aggregate in order to also demonstrate these effects in accordance with the invention.
  • the specific fracture energy G f was related to the net ligament area, ie to the projection of the composite area (ligament level), ie without taking into account the increase in surface area due to the profiling.
  • the G f value is now related to the actual area that is achieved by the profiling and is designated with absolute breaking energy G ° f .
  • the maximum force F max like the specific fracture energy, increases non-linearly with increasing profile area, so that the highest measured value (at the same height as that of homogeneous concrete) also occurs for "Sinus deep" sandblasted.
  • the crack always runs, as expected, along the weaker interface between old and new concrete.
  • the breaking energy increases proportionally to the increase in area.
  • the energy expenditure for crack formation along the interface becomes greater and greater until the point is reached in which the valley passes through the homogeneous material directly from the bottom
  • Profiling to the next the breaking energy becomes the same or greater and the crack spreads in this way.
  • a further increase in the profile surface no longer increases the breaking energy, since the crack will take the direct route through the homogeneous material.
  • the fracture energy for a crack which spreads from valley to valley in a homogeneous material, is made up of two partial amounts: (a) an amount of low specific fracture energy, that of crack propagation at the bonded area in the trough and (b) one Amount of higher fracture energy that comes from the crack propagation in the full material.
  • the profile shape should therefore be chosen so that this proportion (a) is as small as possible ie the profiling is to be carried out in a sine or triangle or similar geometric form.
  • the trapezoidal shape is therefore less suitable.
  • the interplay of composite surface profiling and aggregates leads to a deflection of the crack into the basic material with high crack resistance and additionally creates a mechanical interlocking (between grain-grain and between grain-cement matnx), which increases fracture energy when the material is separated.
  • the composite surface is ablated in such a way that the surface represents the image of a flat transverse wave.
  • the wavelength should correspond to the largest grain diameter and the roughness depth (measured from trough to wave crest) should correspond to half the maximum grain diameter.
  • the surface to be coated is profiled in such a way that it is structured periodically in two mutually perpendicular directions with dimples (depressions) or elevations (crests) and after the surface treatment a more or less uniform pattern of dimples or Has surveys. as shown schematically in Figure 6.
  • the distance between the dimples or crests should be of such dimensions that the roughness corresponds to half the largest grain diameter and the distance between the "valleys" or “mountains” corresponds to the diameter of the largest grains of the aggregate.
  • the profiling of the contact surfaces according to the invention can be produced using various methods and devices. Some such devices and methods are enumerated and described below by way of example.
  • biaxial profiling can be achieved by varying the water pressure in opposite phases from water jet nozzles arranged next to one another at a certain distance.
  • the profiles according to the invention can be produced by grinding or cutting or milling.
  • the tools can already have the desired profile shape or can be guided by appropriate mechanical means so that this shape is formed.
  • a very simple variant of this would be the linear (at a certain distance) arrangement of impact drills, which drill holes with a shallow depth into the surface.
  • this tool is successively shifted again and again by the diameter of the largest grain of the aggregate into the unprocessed area, thus realizing a surface profiling.
  • the drilling devices can also be replaced by ultrasonic hammers or used in combination with drilling machines.
  • Efficient and cost-saving surface treatments can e.g. can be achieved with devices that implement a profiling according to the invention with mechanical processing and a water jet treatment (possibly also sandblasting treatment). Here, e.g. a rough removal by mechanical methods and the post-processing and cleaning by water jets.
  • the milling should be carried out with the appropriate profile shape.
  • a subsequent water jet treatment and simultaneous cleaning increases the adhesion of the asphalt layer enormously, since the crack deflection effect ("toothing effect") already described is further increased.
  • the addition of an increased proportion of binder instead of water blasting and cleaning cannot make up for this improvement in the adhesive bond.
  • the crack finds an almost ideally brittle, flat layer to spread at cold temperatures (the possibility of crack formation is particularly great here) and is no longer forced to "detour".
  • the layered composite can then be separated without much energy consumption, which means that it is very susceptible to cracking.
  • the ripple should have a roughness depth of the order of 10-30 mm, since the usual concrete qualities are made with large grains of 16 to 32 mm. However, a greater roughness depth must be provided in dam construction. In asphalt road construction, on the other hand, a lower roughness depth can be sought due to the addition with smaller, largest grain distributions.
  • dowels e.g. made of metal to increase and improve the adhesion of cement-bound material layers, it is of crucial importance for the durability of the composite, which stretch the composite can endure without cracking.
  • a surface pretreatment of the bearing surface according to the invention leads to the greatest possible expansion capacity of the assembly and thus guarantees that the dowels can absorb and transmit forces in the assembly without cracking. If, on the other hand, the composite has a low expansion capacity, cracks will first appear in the interface and only then will the built-in dowels fully absorb forces or achieve the intended effect. In such cases, however, the opening of the crack mouth usually exceeds the standardized, still permissible value.
  • Another example of an application of the invention is the coating of damaged concrete roads with an asphalt layer.
  • the layered layer can be dimensioned much thinner in comparison to conventional composite manufacturing, since the layered composite according to the invention can withstand higher tensile and shear forces without crack formation.
  • This also applies analogously to composites of cement-bound underlay and cement-bound support layer in general in building and civil engineering. But also in industrial furnace construction, for example, when connecting refractory bricks or, more generally when connecting heterogeneous ceramic materials, profiling the composite surface according to the invention brings about an increase in adhesion.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Repair (AREA)
  • Soil Working Implements (AREA)

Claims (3)

  1. Procédé pour le traitement de surface d'articles à revêtir constitués de matériaux composites à liant de ciment ou bitumineux ou analogues, tels que des routes, des aérodromes, des éléments de pont, etc., selon lequel la surface est rendue rugueuse et nettoyée avant l'application du revêtement, caractérisé en ce que la profondeur de rugosité (RT) correspond à la moitié du diamètre maximum des grains des surfaces à revêtir (3) et respectivement de la couche extérieure (3) de revêtement, et que l'ondulation (WL) correspond au diamètre maximum des grains.
  2. Procédé selon la revendication 1, caractérisé en ce que l'ondulation (WL) est orientée suivant deux axes.
  3. Procédé selon les revendications 1 ou 2, caractérisé en ce que l'ondulation (WL) est formée par une montée monotone du fond du creux de l'onde en direction de la crête de l'onde, et présente en particulier une forme sinusoïdale ou triangulaire.
EP94810402A 1993-07-13 1994-07-07 Procédé pour le traitement de surface d'articles à revêtir Expired - Lifetime EP0634526B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0137793A AT405849B (de) 1993-07-13 1993-07-13 Verfahren zur oberflächenbehandlung von zu beschichtenden werkstücken
AT1377/93 1993-07-13

Publications (2)

Publication Number Publication Date
EP0634526A1 EP0634526A1 (fr) 1995-01-18
EP0634526B1 true EP0634526B1 (fr) 1996-03-13

Family

ID=3512572

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94810402A Expired - Lifetime EP0634526B1 (fr) 1993-07-13 1994-07-07 Procédé pour le traitement de surface d'articles à revêtir

Country Status (6)

Country Link
US (1) US5496130A (fr)
EP (1) EP0634526B1 (fr)
AT (1) AT405849B (fr)
DE (1) DE59400153D1 (fr)
DK (1) DK0634526T3 (fr)
ES (1) ES2085182T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1019939C2 (nl) * 2002-02-11 2003-08-13 Univ Delft Tech Werkwijze voor het hechten van beton aan een substraat alsmede zo verkregen constructie.
US7039528B2 (en) * 2004-07-29 2006-05-02 General Electric Company Method for detecting leak before rupture in a pipeline
US20160017480A1 (en) * 2014-07-16 2016-01-21 Kung-Cheng Chen Layered structure with pattern and process of manufacturing same
RU2600580C1 (ru) * 2015-07-28 2016-10-27 Общество с ограниченной ответственностью "Смоленск-ДорНИИ-Проект" Способ возведения дорожной одежды с заанкериванием слоев асфальтобетонного покрытия и цементобетонного основания
JP7014556B2 (ja) * 2017-09-28 2022-02-01 太平洋セメント株式会社 コンクリート舗装の製造方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB242163A (en) * 1925-04-07 1925-11-05 Charles Augustine Mullen Pavement and method of manufacturing the same
FR1211451A (fr) * 1958-07-18 1960-03-16 Reliance Steel Prod Co Surfaces antidérapantes pour routes en béton
DE1459765A1 (de) * 1964-07-18 1970-02-12 Otto Schmidt Fugenfreie Betonstrasse
DE2039627A1 (de) * 1970-08-10 1972-02-24 Strabag Bau Ag Verfahren zum Herstellen der Verschleissschicht einer Strassenbefestigung
SE342065B (fr) * 1969-07-04 1972-01-24 G Olsson
US3846036A (en) * 1973-04-11 1974-11-05 Roberts Supply Inc Apparatus and method for striating concrete
DE2462571A1 (de) * 1974-03-14 1977-09-01 Reinhard Wirtgen Verfahren und vorrichtung zum belegen einer strassendecke mit einem strassenbelag
FR2274733A1 (fr) * 1974-06-11 1976-01-09 France Etat Procede de traitement de gravillons destines aux techniques routieres, gravillons traites et revetements comportant des gravillons traites
NO752349L (fr) * 1974-07-16 1976-01-19 Huiles Gourdons Et Derives Sa
US4662972A (en) * 1984-02-16 1987-05-05 Thompson Thomas L Method of forming a non-skid surfaced structure

Also Published As

Publication number Publication date
ES2085182T3 (es) 1996-05-16
AT405849B (de) 1999-11-25
ATA137793A (de) 1999-04-15
US5496130A (en) 1996-03-05
EP0634526A1 (fr) 1995-01-18
DK0634526T3 (da) 1996-07-22
DE59400153D1 (de) 1996-04-18

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