Professional load-bearing wall door and window reinforcement beam and plate bonded steel reinforcement company in Nancai Town, Shunyi District

br br>Basic requirements for bonded steel reinforcement:
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br> Pasted steel plate reinforcement is also called bonded steel reinforcement. Buildings with concrete structures are reinforced with pasted steel plates. The following requirements should be met
>:
br br>
br>
br>(
>
br br>) Bonded steel reinforcement of the base layer The strength grade of concrete should not be lower than
>
br>.
br br>
br>
br>(
>
br br>) Glued steel reinforcement The thickness of the glued steel plate is
>-
br> is appropriate. When the calculation requires the thickness to be greater than
>
br br>, it should be pasted in layers.
br br>
br>
br>(
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br br>) When bonding steel reinforcement to the structure of the pressure-bearing area of the building, when bonding steel to the side of the concrete beam , the width of the steel plate should not be greater than the height of the beam
>/.
br br>
br> (
>
br>) The pasted steel plate is outside the reinforcement area The anchorage length
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br br>For the tension zone is not less than
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br>is the thickness of the steel plate
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br br> , and shall not be less than
>
br>For the pressure zone, it shall not be less than
>
br br>, nor shall it be less than
>
br>for earthquake resistance For reinforced, long-span structures or structures that may be subjected to repeated loads, additional anchoring measures such as bolts should be added to the anchorage area.
br br>
br>
br>(
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br br>The surface of the steel plate must be coated with
>
br>cement mortar The thickness of the plastered surface
>:
br br>for beams should not be less than
>
br>, and for slabs should not be less than
>.
br br>
br>
br>(
>
br br>) The reinforcement of the negative moment tension zone at the continuous beam support should be based on whether there are columns in this section and other obstacles, use different pasting methods.
br br> The most important thing in steel reinforcement is the use of steel glue,
>
br> and the treatment of the bonding surface
br br>
br >
> .
br>. The plaster layer, grease and dirt should be chiseled off the concrete pasting surface, and then the concrete surface should be polished with an angle grinder
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br br> For thick surface layer, use compressed air to blow away the dust after polishing. Finally, wipe the surface with cotton cloth and keep it dry for later use.
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br>
> .
br>The pasting surface of the steel plate should be degreased first, and then roughened with an angle grinder until a metallic luster appears. Wipe the surface with dry cotton cloth and keep it dry for later use.
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br>, pressure fixation and unloading system preparation
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br>, components withstand Live loads such as personnel and office machinery should be temporarily removed, and temporary construction loads should be minimized.
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br>For pressure fixation, a system consisting of jacks, pads, and push rods should be used. This system can not only fix the steel plate, but also remove it at the same time. Part of the dead load borne by the component reduces the stress lag, which is more conducive to the coordinated stress of the post-bonded steel plate and the original component, and the reinforcement effect is good.
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br>, Preparation of steel-gluing glue
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>.
br>, Steel-gluing glue is
>
br br>,
>B
br>Two components, the ratio is
>
br br>:
>B=< br/>br>：
>
br br>. It is advisable to use mechanical stirring to mix the glue. The stirrer can be composed of an electric hammer and stirring teeth. The stirring teeth can be made of cross-shaped steel bars welded to the end of the electric hammer drill bit. Small amount
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br>refers to
>.
br br>within kilogram
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br>also available&
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>
br>Manual stirring with thin steel rods.
br br>
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br>, take a clean container and a weighing instrument to mix according to the mixing ratio, and stir with a stirrer
>
br br>for about 1 minute Until the
>
br>,
>B
br br> components are mixed evenly. When stirring, it is best to stir in the same direction
>,
br>Try to avoid mixing air to form bubbles. The amount of glue added each time should not be too much, and it should be mixed and used immediately.
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br>, gluing and pasting
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br>After the adhesive is prepared, use greasy Apply the knife to the surface of the treated steel plate
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br br>or concrete surface
>)
br>. The glue section should be slightly triangular, with a thick middle
>
br br>About millimeters, the edge thickness is about
>
br>mm, then stick the steel plate to the component, temporarily fix it with the prepared fixed pressure system, and properly Apply pressure until the glue is just squeezed out from the edge of the steel plate.
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>.
br>. Steel glue is highly thixotropic and resistant to sagging, but uneven pressure may still cause slight local flow, so stick it
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br br>Attention should be paid to inspection within hours. If glue is found to be lacking, replenish it in time.
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br>, curing, and pressure relief fixing system
br br> Steel-bonded structural adhesive can be cured well at normal temperatures and low temperatures.
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br>, Inspection
br br> During inspection, you can lightly tap the pasted steel plate with a small hammer, and judge the pasting effect from the sound. You can also use an ultrasonic instrument to detect it. If the effective bonding area in the anchoring area is less than
>%
br br> and the effective bonding area in the non-anchoring area is less than
>%
br>, the steel plate should be peeled off and re- Paste.
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br>, maintenance
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br>Paste
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br br>After the day, the steel plate should be coated with anti-rust paint
>
br>.
br br> Steel adhesive is mainly used for load-bearing reinforcement bonding of building structures. The reinforcing steel plates, profiles or other reinforcing materials are firmly bonded to the components of various reinforced concrete structures. It can also be used in load-bearing structures of aging buildings and ancient buildings. Choosing a good steel adhesive is especially important for construction. Beijing Huayichen Architectural Specialty always adheres to the firm belief of "not letting an unqualified product leave the factory" and provides customers with high-quality products, which you can rest assured choose! Consultation hotline:
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br>!
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br>General Manager Ji Jinlei and all staff welcome your telephone consultation service!