• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for reinforcing walls, slabs, floors and other concrete elements (1) by cutting slits (4) in the surface layer of a wall, floor or a concrete element (1) to be reinforced, b) cleaning and filling (4) with an adhesive resin (5) or with mortar. If resin is used, it must overflow and spread over the surface of the concrete element (1) to improve the subsequent application of a coating, c) inserting and immersing one or more CFK lamellae for taking up traction forces (3) or one or more carbon fiber bars (7) in the resin (5) or the mortar in each slot (4). When using resin (5), cover the slots and the concrete element with quartz sand, d) protecting the wall, concrete floor or reinforced concrete object (1) from moisture for at least 8 hours, e) applying a coating to the surface of the reinforced concrete layer. The invention also relates to a wall, a slab, a concrete floor or a concrete element (1), characterized in that it comprises, in its surface layer, at least one slot (4) filled with an adhesive resin (5) or mortar and at least one reinforcing strip (3) in the form of a CFK lamella (3) or a carbon fiber bar completely surrounded by the resin or mortar.
    公开号:CH712326A1
    申请号:CH00593/16
    申请日:2016-05-04
    公开日:2017-11-15
    发明作者:Pellissier Etienne；Tixier Michaël
    申请人:S&P Clever Reinforcement Company Ag；
    IPC主号:
    专利说明:

    Description: [0001] The present invention relates to a reinforcement method for floors, slabs, platforms and concrete walls equipped with special reinforcements in order to prepare them for receiving various coatings such as, for example, self-finishing layers in accordance with the present invention. various materials.
    In the construction industry, concrete is very widely used, especially for the manufacture of rafts (floor plates), slabs, platforms, supports of all kinds, and of course walls and ceilings. These concrete rafts are then covered by different types of materials, for example a mortar, a polyurethane, etc. to finally provide support for floor coverings or floor finishes. The upper layer of the slab or concrete wall includes several centimeters of concrete that is applied over the rebar. This layer of concrete does not take up tension forces and is therefore weakened. Whenever a heavy load is laid on the raft, for example heavy equipment or objects, this area is stressed and horizontal forces are generated from this load and this can cause long-term damage. Likewise, the surface layer of concrete walls or other concrete elements remains weak while it should absorb tensions.
    The object of this invention is to provide a method and a system for reinforcing riffles, slabs, platforms, walls and other concrete elements, especially slabs and floors to receive coating and floor finishes and improve its stability and resistance against tensile forces that may appear.
    The object of the invention is achieved by a method of reinforcing walls, slabs, rafts and other concrete elements by a) cutting slots (4) in the surface layer of the wall, floor or wall. concrete element (1) to be reinforced, b) cleaning and filling the slots (4) with an adhesive resin (5) or with mortar. If resin is used, it will overflow and spread over the surface of the concrete object (1) to improve the subsequent application of a coating, c) inserting and immersing one or more preconditioned CFK slats (3) or carbon fiber bars (7) in resin (5) or mortar, in each slot (4). When using resin (5), cover it with quartz sand, d) protecting the wall, floor or concrete object (1) with moisture for at least 8 hours, e) applying a coating on the Reinforced concrete surface layer.
    The object is further provided for a wall, a concrete floor or a concrete element characterized in that it comprises, in its surface layer, at least one slot filled with an adhesive in the form of resin or mortar and at least one reinforcing strip in the form of a CFK lamella or a carbon fiber bar completely surrounded by the resin or mortar.
    The invention will be described and explained with the aid of the diagrams attached and the method of application of the reinforcement strips will be explained in detail.
    Fig. 1 shows a concrete block in perspective showing the section of a concrete slab, floor or wall with slots and reinforcement strips inserted;
    Fig. 2 Shows a perspective concrete block representing the section of a slab, floor or wall with slots and carbon fiber bars inserted.
    First of all, to reinforce the surface layer of a concrete block which may be a concrete floor, a concrete wall or another concrete element, we need to determine how many strips must be applied and how they will be arranged geometrically. To this end, there are a number of prerequisites, such as:
    The tensile force of the concrete support:> 1.0 N / mm2
    Concrete substrate temperature: above the dew point of 3 ° C
    Moisture of the concrete support: 4%
    Application temperature range: +10 ° C to +35 ° C
    Storage temperature of the resin: +8 ° C to +35 ° C
    First, the slab, the floor, the concrete wall or the concrete element 1 as shown in FIG. 1 must be clean and dry. The thickness of the layer above the reinforcing steel 2 in the concrete 1 must be known and taken into account so that it is not damaged during the cutting of the slots 4. Then, the lines along which reinforcements 3 should be applied are measured and marked on the surface of the concrete. A minimum distance between these lines should be maintained to obtain a minimum distance between reinforcement strips 3 laid later. This minimum distance is at least 32 mm. After marking, the slots 4 are made along the marked lines using a dry or wet concrete saw. The widths of the slits 4 cut in the surface layer of the concrete 1 are 3-8 mm for lamellae 1-4 mm thick and the depth of the slits 4 vary from 10 mm to 45 mm depending on the width of the strips to be inserted and according to the provision provided: crossed or not.
    After cutting the slots 4, they must be completely and thoroughly cleaned. This is crucial for the adhesion of the resin which will ensure the transmission of the tension forces of the inner faces of the slots 4 reinforcement strips 3 placed inside. To ensure thorough cleaning, cleaning with high pressure water is preferably performed. This is followed by a drying of the slots 4. This procedure ensures the removal of any trace of oil that may be present in the slots 4. After the drying of the slots 4, the moisture of the concrete surfaces of the slots 4 should be below 4%. As an alternative method, you can also cut the strips with a circular saw equipped with a dust extractor.
    Then, the reinforcement strips 3 must be cut to the appropriate lengths to be placed in the slots 4. For this purpose, the strips 4 in the form of CFK lamellae are cleaned with a towel impregnated with a solvent such as Acetone. The entire surface of the CFK 3 slats should be cleaned with this solvent to ensure optimum transmission of tensile forces by the adhesive resin that will be applied to these surfaces.
    Once the slots 4 made in the concrete 1 and CFK 3 slats prepared, the cut and cleaned slots 4 are filled with an adhesive 5. A suitable adhesive resin is poured into the slots at a temperature between 10 ° C up to 35 ° C while concrete 1 must have a temperature of at least 8 ° C up to 35 °. This first type of low viscosity resin is a solvent-free 2-component epoxy resin, transparent with a formulated amine hardener. The resin has a density of 1.11 kg / l and the resin-hardener ratio is 2: 1. At 10 ° C, for example, it can be applied for a period of 3 hours and the curing time is 7 days. After 14 days, the tensile strength is 35.8 N / mm 2. The elongation at break is 2.3% and the static modulus of elasticity is 2'515 N / mm 2 while the dynamic modulus of elasticity is 2'989 N / mm2 at -20 ° C and 2'515 N / mm2. N / mm2 at + 20 ° C. Such a resin is delivered with prescribed mixing ratios. The hardener (Component B) is poured into the resin (Component A). Once opened, it is important that the hardener is used completely. The mixture of the two components is preferably made by means of a mixer, at low speed, equipped with pastes at a temperature of 15 ° C up to 20 °. In this way, the resin 5 is mixed with this rotation mixer at a maximum of 400 rpm for at least 3 minutes to obtain a homogeneous resin with a uniform color, without any trace. At a higher temperature, the application time will be substantially reduced.
    A second type of similar adhesive resin with a higher viscosity can also be used, especially for wall and ceiling applications. It is a solvent-free, thixotropic epoxy resin. This two-component epoxy adhesive resin was developed for bonding carbon fiber slats. It has a density of 1.70 to 1.80 g / cm3. The mixing ratio of resin and hardener is 4: 1 (both by weight or by volume). The compressive strength of this resin when applied is> 70 N / mm2. The modulus of elasticity is> 7Ί00 N / mm2 and the shear strength is> 26 N / mm2. The traction force on the CFK lamellae is> 3 N / mm2 as on the concrete at 20 ° C.
    According to the viscosity, the filling of the slots with the resin can be carried out by gravity or with a cartridge gun if it is a resin with a high viscosity so that these slots are completely filled up to overflow on the surface of the slab or soil. Then, the reinforcing strips 3, the CFK lamellae, can be placed in the slots 4 by immersing them in the adhesive resin 5 so that they are completely taken in the resin 5. Subsequently, the slots filled with resin with, inside, the lamellae surrounded by resin are covered with quartz sand. The sand must completely cover the surface where the glue has overflowed or even the total surface of the slab or plate to be reinforced. This will improve the application of a subsequent layer for the flooring and enhance mechanical adhesion. Finally, it must be ensured that the open slots 4 and the inserted CFK strips 3 are protected from humidity for at least 8 hours. If the surrounding temperature is 23 ° C and the humidity in the building or the workplace is around 50%, the hardening of the adhesive resin 5, and therefore the reinforcement system, will be completely effective and can be put energized within 72 hours.
    As an alternative, instead of using a resin, the surfaces of the slats can be roughened by specific measures. For example: they can be treated with sand to make their surface rough, whether in the factory or directly on site. After filling the slots, by pumping concrete or mortar, the rough lamellae are inserted into the slots so that they are finally completely embedded in the concrete.
    权利要求:
    Claims (10)
    [1]
    In the following table, various types of lamellae 3 and resins are given for practical cases and applicable for most cases. It indicates the quantity and type of resin 5 that should be used per meter of slot 4 depending on the type of lamella that will be inserted: Type of lamella CFK Type of resin with low viscosity Type of resin with high viscosity 10 mm width 1.4 mm thickness approx. 80 g / m approx. 120 g / m 10 mm width 2.8 mm thickness approx. 80 g / m approx. 120 g / m 15 mm width 2.5 mm thickness approx. 110 g / m approx. 160 g / m 20 mm width 1.4 mm thickness approx. 130 g / m approx. 200 g / m [0016] In FIG. 2, an alternative to the use of inserted slats is shown. In this example, carbon fiber bars 7 are inserted. They are here substantially the same diameter d as the steel reinforcing bars. For these carbon fiber bars 7, slots 4, about three times the width of the slits for the slats shown in FIG. 1, are cut in the concrete slab 1. These slits 4 are then filled with a resin 5 or a mortar and finally 7 carbon fiber bars are immersed in the filling material so that they are completely surrounded by the resin 5 or the mortar as indicated. Typically, the diameter of the carbon fiber bars 7 is about 2/3 of the width of the slots 4. The carbon fiber bars 7 are used for the same reasons as the slats. claims
    1. Method for reinforcing walls, slabs, concrete floors or other concrete elements by: a) cutting slots (4) in the surface layer of the wall, floor or concrete object (1) to be reinforced , b) cleaning and filling (4) with an adhesive resin (5) or with a mortar. If a resin is used, it will overflow and spread over the surface of the concrete object (1) to improve the subsequent application of a coating, c) inserting and immersing one or several preconditioned CFK slats (3) or carbon fiber bars (7) in the resin (5) or the mortar, in each slit (4). When using resin (5), cover it with quartz sand, d) protecting the wall, floor or reinforced concrete element (1) with moisture for at least 8 hours, e) applying a coating on the reinforced concrete surface layer.
    [2]
    Method for reinforcing walls, slabs, concrete floors or other concrete elements (1) according to claim 1, characterized by the following steps: a1) defining and marking the location and direction of the CFK lamellae ( 3) or carbon fiber bars (7) to be applied in the surface layer of a concrete floor (1) by measuring its area and thickness and determining the application timing of the CFK (3) lamellae or reinforcing carbon fiber bars (7), a2) cutting slots (4) in the surface layer of the concrete floor (1) along the marks, in widths of 3 mm to 8 mm and depths of 10 mm. mm to 45 mm depending on the type and number of CFK (3) slats or carbon fiber bars (7) with a width of 10 mm to 20 mm, b1) thoroughly clean the slits (4) by emptying them, then measure the temperature and humidity of the concrete (1), the dew point and the air temperature, b2) mix a resin adhesive (5), with a hardener to obtain a pasty mass of homogeneous color, b3) filling the slots (4) with said adhesive resin mixture (5) and the hardener so that it overflows the slots and also covers surface, c1) preparation of CFK (3) reinforced slats by cleaning and degreasing them by applying an Acetone type cleaner on both sides, or preparing carbon fiber bars (7), c2) insert the CFK strips (3) or the carbon fiber bars (7) in the filled slots (4) so that they are completely immersed and surrounded by the adhesive resin, c3) cover the slots and the entire surface where the resin has overflowed, or even the entire surface of the slab or plate to be reinforced with quartz sand having a particle size of 0.9 to 1.4 mm to improve the subsequent application of a coating, in accordance with steps d) summer).
    [3]
    3. Method for reinforcing walls, slabs, concrete floors or other concrete elements (1) according to claim 1, characterized by the following steps: a) cutting slots (4) in the surface layer of the wall, ground or concrete element (1) to be reinforced, b) clean and fill slots (4) with a mortar, c) insert and immerse one or more CFK (3) strips or carbon fiber bars roughened in (7) in the mortar in each slot (4), d) apply a coating on the reinforced concrete surface.
    [4]
    4. Method for reinforcing walls, slabs, concrete floors or other concrete elements (1) according to claim 1, characterized by the following steps: a) cutting intersecting slots (4) in the surface layer concrete floor or concrete wall (1), those in the first direction with a first depth, those in the second direction with a greater depth. The slots (4) must have an additional free space of at least 1 mm on both sides of the strips (3) or carbon fiber bars (7) so that they can be inserted. B) Mix an adhesive resin ( 5) with a hardener with a mechanical dough mixer up to 400 rpm for at least 3 minutes, at a temperature between 15 ° C and 25 ° C, to obtain a homogeneous and colored paste. Fill the slots (4) with the adhesive resin (5) with a cartridge gun.
    [5]
    Method for reinforcing walls, slabs, concrete floors or other concrete elements (1) according to one of claims 1, 2 or 4, characterized by c) two or more CFK lamellae (3) or carbon fiber bars (7) are inserted in each filled slots (4) so that they are completely immersed and surrounded by the adhesive resin (5).
    [6]
    6. Method for reinforcing walls, slabs, concrete floors or other concrete elements (1) according to claim 1, characterized by the following steps under a), b) and c): a1) define and mark on the surface layer of the concrete floor (1) the location and direction of the CFK (3) slats or carbon fiber bars (7) to be applied by measuring its area and thickness and determining the slump to apply the slats CFK (3) or reinforcing carbon fiber bars (7), a2) cutting slots (4) in the surface layer of the concrete floor (1) along the marking, over a width of 3 mm to 8 mm and a depth of 10 mm to 45 mm depending on the type and number of CFK strips 10 to 20 mm wide (3) or carbon fiber bars (7), b1) thoroughly clean the slots (4) in emptying them, then measuring the temperature and humidity of the concrete (1), the dew point and the temperature of the surrounding air, b2) mixing a r adhesive sine (5) with a hardener to obtain a homogeneous and colored mass, b3) filling the slots (4) with said adhesive resin mixture (5) and hardener so that it overflows the slots (4), c1) preparing the reinforcement strips CFK (3) by cleaning, degreasing and applying an acetone type cleaner on both sides, or by preparing the carbon fiber bars (7), c2) inserting the CFK lamellae (3) or carbon fiber bars (7) in the filled slots (4) so that they are completely immersed and surrounded by the adhesive resin, c3) cover the slots and the entire surface where the resin has overflowed or even the entire surface of the slab or plate to be reinforced with quartz sand with a particle size of 0.9 to 1.4 mm to improve the subsequent application of a coating, according to steps d) and e).
    [7]
    Wall, slab, concrete floor or concrete element (1), characterized in that it comprises in their surface layer at least one slot (4) filled with an adhesive resin (5) or a mortar and at least one reinforcing strip (3) in the form of a CFK lamella or carbon fiber rod (7).
    [8]
    Wall, slab, concrete floor or concrete element (1), according to claim 7, with in its surface layer several slots (4) of 3 mm to 8 mm width and a depth of 10 mm. at 45 mm and in these slots (4) one or more CFK lamellas (3) of 10m to 20mm width and 1mm to 4mm thickness or one or more carbon fiber bars (7) with adapted slots to their width (4).
    [9]
    9. Wall, slab, concrete floor or concrete element (1), according to claim 7 or 8, characterized in that it comprises, in its surface layer, several slots (4) of 3 mm to 8 mm width and a depth of 10 mm to 45 mm and in these slots (4) one or more CFK slats (3) of 10 mm to 20 mm wide and 1 mm to 4 mm thick or one or more bars in carbon fiber (7) with a suitable slot width (4).
    [10]
    Wall, slab, concrete floor or concrete element (1), according to the preceding claims 7 to 9, characterized by: in its surface layer, a plurality of crossed slots (4) of 3 mm to 8 mm in width, and in a first direction of a depth of 10 mm and in a direction crossed at the first direction with a greater depth up to 45 mm and in these slots (4) one or two CFK lamellae (3) of 10 mm to 20 mm. mm of the width and 1 mm to 4 mm thick or one or more carbon fiber bars (7) with a suitable slot width (4).
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    同族专利:
    公开号 | 公开日
    CH712326B1|2020-10-30|
    FR3051009A1|2017-11-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP2711484A2|2012-09-19|2014-03-26|Bilfinger Construction GmbH|Component with a flat reinforcing element|
    US20140099456A1|2012-10-09|2014-04-10|Venkatkrishna Raghavendran|Fiber reinforced polymer strengthening system|
    WO2014195504A1|2013-06-06|2014-12-11|Sika Technology Ag|Arrangement and method for reinforcing supporting structures|
    法律状态:
    2018-04-13| PK| Correction|Free format text: RECTIFICATION INVENTEUR |
    优先权:
    申请号 | 申请日 | 专利标题
    CH00593/16A|CH712326B1|2016-05-04|2016-05-04|Process of reinforcing walls, slabs, floors and other concrete elements.|CH00593/16A| CH712326B1|2016-05-04|2016-05-04|Process of reinforcing walls, slabs, floors and other concrete elements.|
    FR1753945A| FR3051009A1|2016-05-04|2017-05-04|METHOD AND SYSTEM FOR REINFORCING CONCRETE SOILS, WALLS AND PLATFORMS, AND THESE CONCRETE ELEMENTS EQUIPPED WITH SUCH REINFORCEMENTS|
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