EP0183682A2 - Procédé de compactage du béton - Google Patents

Procédé de compactage du béton Download PDF

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Publication number
EP0183682A2
EP0183682A2 EP85890293A EP85890293A EP0183682A2 EP 0183682 A2 EP0183682 A2 EP 0183682A2 EP 85890293 A EP85890293 A EP 85890293A EP 85890293 A EP85890293 A EP 85890293A EP 0183682 A2 EP0183682 A2 EP 0183682A2
Authority
EP
European Patent Office
Prior art keywords
mold
concrete mix
concrete
reciprocating movement
compacting
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.)
Withdrawn
Application number
EP85890293A
Other languages
German (de)
English (en)
Other versions
EP0183682A3 (en
Inventor
Heikki Ilmari Kankkunen
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.)
Rakennusvalmiste Oy
Original Assignee
Rakennusvalmiste Oy
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rakennusvalmiste Oy filed Critical Rakennusvalmiste Oy
Publication of EP0183682A2 publication Critical patent/EP0183682A2/fr
Publication of EP0183682A3 publication Critical patent/EP0183682A3/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting

Definitions

  • the present invention relates to a method in accordance with the preamble of claim 1 for compacting concrete in a mold.
  • the molds are generally fabricated of steel, wood, concrete, or some'other stiff plate material.
  • the molds are dimensioned to withstand the casting pressure during concrete pouring and compaction without appreciable deformation.
  • the molds must be capable of being dismantled after the concrete has set.
  • the casting is generally carried out by loading concrete into the mold in small quantities by vibrating the mold simultaneously or by using separate vibrators for compaction. Filling the mold is continued by adding concrete in small quantities until the mold is filled up to the rim and the upper surface can be smoothed.
  • Various vibrating methods are applied in prior art casting procedures, according to mold size, shape and concrete mix stiffness.
  • Common vibrators are of the high-frequency vibrating type, which are stiffly mounted to the mold and integrally transfer the vibration energy to the cast concrete.
  • another conventional method is to use a high-frequency vibrator rod which is transported or transferred according to the progress of the casting process to the point where compaction is desired.
  • the aim of the invention is to overcome the drawbacks of prior art techniques and to present an entirely new method of concrete compaction.
  • the method according to the invention is based on effecting concrete compaction by internal shear in concrete, produced by acceleration or deceleration forces generated by the movement of mold walls.
  • the method offers appreciable advantages.
  • the method is applicable for casting both fluid and stiff concretes.
  • the invention facilitates the fabrication of thinner constructions than those previously achieved.
  • the compactness of concrete surfaces is also improved.
  • a vertical mold of Figure 1 the compaction of a concrete mix 1 is achieved by a simultaneous, synchronized reciprocating movement of both mold walls 2 and 3 in the vertical direction.
  • This arrangement conveys in the concrete mix 1 a changing kinetic energy causing the concrete mix to be subjected to an internal shear action and leading to compaction under internal pressure.
  • a static friction is generated between the mold surface and the concrete mix, opposing the gliding of the concrete mix along the mold surface.
  • the concrete mix shears (with internal displacements) rather than glides in respect to the surface.
  • the preferable amplitude of mold wall shear movement depends to a great extent on the stiffness of the cast concrete and the thickness of the cast structure.
  • the preferable amplitude for applications in conjunction with conventional molds is in the order of 0.5...30 mm.
  • the preferable shear movement frequency also depends on the stiffness of the concrete mix and, consequently, on its internal friction, because the acceleration or deceleration of the movement of mold walls 2, 3 must be sufficient to overcome the internal friction of the concrete mix to generate internal shear and displacement in the concrete mix.
  • the applicable frequency range for casting concrete elements of conventional construction is in the range of 2...2000 strokes/second, preferably 4...300 strokes/s (2...150 Hz).
  • Figure 1 shows in schematic form the displacement caused in the concrete mix by acceleration or deceleration on the plane of the mold wall.
  • Figure 2 shows the corresponding displacement when the mold is plane mold, open from the top and its bottom 7 constructed for reciprocating movement in the horizontal direction.
  • the displacement shear action compaction method is applied to a conventional pillar or beam mold.
  • the compaction can be achieved by simply providing a simultaneous synchronized reciprocating movement of mold walls 2, 3 and 8.
  • Figure 4 shows a mold with walls in which a combined longitudinal and transversal movement in the mold surface plane is advantageously applied.
  • the row mold of the battery mold type in Figure 5 has mold walls 2, 3, and 4 connected at one end of each wall, respectively, via jointed bars 12 and associated bearings 11 to a camshaft-type actuator 9, which is permanently fixed by bearings 10.
  • a camshaft-type actuator 9 which is permanently fixed by bearings 10.
  • Figure 6 shows a flat one-sided mold in which all trajectories described above can be applied separately or in combinations.
  • the trajectory shown in Figure 7a is aligned to lie entirely in the longitudinal direction of the mold surface.
  • Figure 7b shows a combined movement in the longitudinal and transverse direction, essentially improving the shear action.
  • Figure 7c shows the trajectory only in the transverse direction of the mold surface.
  • Figure 7d shows a combined trajectory which forms an annular movement in the plane of the mold surface.
  • the annular trajectory can also differ from a circle to create local maxima of acceleration or deceleration (Figure 7e).
  • the mold trajectory can also be configured to include combinations of the aforementioned trajectories so that impulse-like discontinuities of high acceleration are added to the trajectory to exceed the internal friction of the concrete mix at these discontinuities.
  • the mold surface can also be roughened to eliminate glide between the surface and the concrete mix.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Seal Device For Vehicle (AREA)
EP85890293A 1984-11-29 1985-11-28 Method of compacting concrete Withdrawn EP0183682A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI844686 1984-11-29
FI844686A FI844686L (fi) 1984-11-29 1984-11-29 Foerfarande foer komprimering av betong.

Publications (2)

Publication Number Publication Date
EP0183682A2 true EP0183682A2 (fr) 1986-06-04
EP0183682A3 EP0183682A3 (en) 1988-08-31

Family

ID=8519979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85890293A Withdrawn EP0183682A3 (en) 1984-11-29 1985-11-28 Method of compacting concrete

Country Status (4)

Country Link
EP (1) EP0183682A3 (fr)
DK (1) DK550085A (fr)
FI (1) FI844686L (fr)
NO (1) NO854779L (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0241172A2 (fr) * 1986-04-07 1987-10-14 Lohja Parma Engineering Lpe Oy Procédé et machine fileuse pour mouler des panneaux en béton
WO1991017874A1 (fr) * 1989-03-10 1991-11-28 Skako Imac Ab Procede et dispositif de fabrication d'elements de beton vibre
EP1249559A2 (fr) * 2001-04-12 2002-10-16 Tubag Trass-, Zement- und Steinwerke Gmbh Procédé et dispositif pour appliquer une finition d'enduit sur des éléments de constructions de murs dressés ainsi que des éléments de constructions de murs correspondants

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE409312A (fr) *
DE382712C (de) * 1923-10-05 Bonnet Aine Et Ses Fils A Ruettelmaschine zur Herstellung von Bausteinen u. dgl.
US2057466A (en) * 1934-06-16 1936-10-13 Hartford Empire Co Method of and apparatus for molding refractory blocks and the like
CH477964A (fr) * 1968-01-23 1969-09-15 Beam British Engineering Appli Maschine mobile pour la fabrication en continu de poutrelles en béton
GB2108897A (en) * 1981-10-14 1983-05-25 Ronald Leslie Attwell Orienting the fibres during the casting of fibre-reinforced concrete

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE409312A (fr) *
DE382712C (de) * 1923-10-05 Bonnet Aine Et Ses Fils A Ruettelmaschine zur Herstellung von Bausteinen u. dgl.
US2057466A (en) * 1934-06-16 1936-10-13 Hartford Empire Co Method of and apparatus for molding refractory blocks and the like
CH477964A (fr) * 1968-01-23 1969-09-15 Beam British Engineering Appli Maschine mobile pour la fabrication en continu de poutrelles en béton
GB2108897A (en) * 1981-10-14 1983-05-25 Ronald Leslie Attwell Orienting the fibres during the casting of fibre-reinforced concrete

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0241172A2 (fr) * 1986-04-07 1987-10-14 Lohja Parma Engineering Lpe Oy Procédé et machine fileuse pour mouler des panneaux en béton
EP0241172A3 (en) * 1986-04-07 1988-04-27 Kt-Suunnittelu Oy Method and slipforming extruder for casting concrete slabs
WO1991017874A1 (fr) * 1989-03-10 1991-11-28 Skako Imac Ab Procede et dispositif de fabrication d'elements de beton vibre
EP1249559A2 (fr) * 2001-04-12 2002-10-16 Tubag Trass-, Zement- und Steinwerke Gmbh Procédé et dispositif pour appliquer une finition d'enduit sur des éléments de constructions de murs dressés ainsi que des éléments de constructions de murs correspondants
EP1249559A3 (fr) * 2001-04-12 2003-08-13 Tubag Trass-, Zement- und Steinwerke Gmbh Procédé et dispositif pour appliquer une finition d'enduit sur des éléments de constructions de murs dressés ainsi que des éléments de constructions de murs correspondants

Also Published As

Publication number Publication date
FI844686L (fi) 1986-05-30
NO854779L (no) 1986-05-30
DK550085D0 (da) 1985-11-28
EP0183682A3 (en) 1988-08-31
FI844686A0 (fi) 1984-11-29
DK550085A (da) 1986-05-30

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