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
  • E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
  • E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
  • E01C11/14—Dowel assembly ; Design or construction of reinforcements in the area of joints
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
  • E04F15/00—Flooring
  • E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
  • E04F15/14—Construction of joints, e.g. dividing strips

Definitions

• the present invention relates to a device for joints in concrete floors, and a casting method in which the device is used.
• a further problem arising in joint spacing is that the concrete slabs rise and are pressed down differently when mechanically damaged, thereby causing differences in level between the concrete slabs.
• dowels are normally used which are cast into one slab part and which in the other slab part are coated with bitumen to allow sliding.
• One object of the present invention is to provide a device for joints in concrete floors, by means of which the problems with shrinkage cracks, damaged joint edges and differences in level between the concrete slabs are avoided.
• a further object of the present invention is to provide means for mounting the device according to the present invention in the concrete floor.
• One more object of the present invention is to pro ⁇ vide a method for casting concrete floors, in which the device according to the invention is used.
• the present invention thus relates to a device for joints in concrete floors, which comprises edge linings with clasps.
• the clasps and the edge linings are intercon ⁇ nected in a fixed manner, and each clasp is designed as two laterally projecting arches which join in an arcuate, downwardly extending projection.
• the present invention also relates to a means for pressing down the device for joints in concrete floors, and a means for mounting the device for joints in con ⁇ crete floors before casting the concrete floor.
• the present invention relates to a method for casting concrete floors, comprising the steps of casting the concrete floor on the base and steel trowel ⁇ ling of the floor surface.
• the device according to claim 1 is pressed down in the concrete before hardening thereof, whereupon the edge linings are adjusted in the steel trowelling of the concrete surface.
• the concrete floor is sawn between the edge linings to a depth which is smaller than the depth of the clasps, whereupon the now formed joints are filled with a semi-elastic sealing compound.
• the present invention also relates to a method in which the device for joints in concrete floors is mounted on means in the form of trestles, whereupon the concrete floor is cast and steel trowelled.
• the concrete floor is sawn between the edge linings to a depth which is smaller than the depth of the clasps, whereupon the now formed joints are filled with a semi-elastic sealing compound.
• Fig. 1 is a top plan view of a preferred embodiment of the device for joints in concrete floors according to the present invention.
• Fig. 2 is a cross-sectional view of a preferred embodiment of the device for joints in concrete floors according to the present invention in a reinforced con ⁇ crete floor.
• Fig. 3 is a top plan view of a preferred embodiment of a means for pressing down the device for joints in concrete floors.
• Fig. 4 is a side view of the means for pressing down the device for joints in the concrete floor.
• Fig. 5 is a top plan view of a preferred embodiment of a means for mounting the device for joints before casting the concrete.
• Fig. 6 is a side view of the means for mounting the device for joints before casting the concrete floor.
• the embodiment of the device for joints in concrete floors according to the present invention as illustrated in Figs 1 and 2 comprises edge linings 1 and one or more clasps 2, the clasps 2 being attached to the edge lin ⁇ ings 1.
• the edge linings 1 are fixed relative to each other.
• the clasps 2 are designed as two laterally projecting, V-shaped arches 3 which join in a downwardly extending, U-shaped projection 4.
• the inventive device is used when casting concrete floors, in which process the device is pressed down in the concrete before hardening.
• the concrete floor is steel trowelled and then also the edge linings 1 are adjusted.
• a joint 5 is cut in the con ⁇ crete floor between the edge linings 1.
• the joint 5 is made so deep that it extends into the U-shaped projec ⁇ tion 4 and through the reinforcement 6 of the concrete floor, but not so deep that the clasps 2 are sawn apart. This joint 5 is then filled with an elastic compound.
• the shrinkage of the area divided by the joints 5 can take place without the clasps 2 being damaged or preventing shrinkage. Cracks do not arise during shrinkage since the slab parts on each side of the sawn-up joint are allowed to shrink without resistance from the other ele ⁇ ments included in the concrete. No difference in level is possible between the edge linings 1, since the edge linings 1 are kept in a fixed position relative to each other by means of the projections 4 of the clasps 2.
• the embodiment shown in Figs 3 and 4 of a means for pressing down the device in Figs 1 and 2 in the concrete floor comprises a spear 7 with at least one spear head 8 and fastening means 9 having a clamping function 10 for fixing the device in Figs 1 and 2.
• the pressing-down means is also fitted with a handle 11 at the top of the spear 7.
• the pressing-down means is used when the device in Figs 1 and 2 should be pressed down in the cast con ⁇ crete. Such pressing-down means permit vertical and horizontal adjusting of the edge linings and fixing thereof in the correct position.
• the embodiment shown in Figs 5 and 6 of a means for mounting the device in Figs 1 and 2 before casting of the concrete floor comprises a cup-shaped recess 12 for the arcuate projections 4 of the clasps 2, a recess 13 for receiving the edge linings 1 and a recess 14 for the laterally projecting arches 3 of the clasps 2, and a base portion 15.
• the mounting means is used when the device in Figs 1 and 2 is mounted in situ before casting of the con ⁇ crete floor.
• the mounting means can also be fixed to the base by "local" concrete blocks which are cast round the base portion 15 of the mounting means.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
• Joining Of Building Structures In Genera (AREA)
• Floor Finish (AREA)
• Building Environments (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20388154

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (1)

Citations (4)

• 1992
  • 1992-12-17 SE SE9203802A patent/SE500738C2/sv unknown
• 1993
  • 1993-11-29 WO PCT/SE1993/001026 patent/WO1994013906A1/en not_active Application Discontinuation
  • 1993-11-29 CA CA 2151964 patent/CA2151964A1/en not_active Abandoned
  • 1993-11-29 EP EP94903191A patent/EP0675991A1/en not_active Withdrawn
• 1995
  • 1995-06-14 NO NO952342A patent/NO952342L/no unknown
  • 1995-06-16 FI FI952994A patent/FI952994A/sv not_active Application Discontinuation

Patent Citations (4)

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