Reinforcement of cracks in concrete structures by injection

来源：安德美    发布时间：2016年12月09日 12:50:52

Technical Summary:

 Due to stress or other causes of cracks in concrete structural components, the use of crack reinforcement reinforcement method, the special polymer binder (commonly used modified epoxy resin, a coagulation, acrylic and other specially adapted Adhesives) into the cracks to achieve the structure of the cross-section to restore their integrity and restore the integrity of the carrying capacity of the purpose, while blocking the cracks to avoid exposure to the media and the role of steel corrosion.

 Main technical characteristics:

 The use of special crack filling device (the so-called "wall can be" automatically) to complete the injection of adhesive material

 Material viscosity, easy to penetrate and filled into the cracks in the fine.

 The surface tension of the material is less than the critical surface tension of the concrete, and the wettability is good.

 The mechanical properties of the casting material and the bond strength between concrete and the concrete are much higher than the corresponding strength index of concrete to ensure that the loading process after the completion of the repair will not appear due to bonding material itself or bonding interface damage Reinforcement reinforcement failure phenomenon.

 Material anti-aging machine Corrosion resistance (such as acid, alkali, salt, water and other media) strong, to ensure the repair life

 Material curing process almost no shrinkage, to avoid the curing shrinkage stress caused by repair defects.

 The infusion device automatically injects the repairing material into the crack, and keeps the constant low pressure between 0.2MPa and 0.3MPa. It can overcome the capillarity and can inject the repairing material into the fracture end with the width of only 0.02mm.

 Construction is convenient, high efficiency, without slotting or pipe, can be achieved several consecutive injections.

 2 reinforced concrete structure reinforcement

 Process Description:

 Is the use of high-strength chemical adhesives, so that steel (or screw) and the concrete to produce grip force, so as to achieve the desired results. After the construction of high load bearing capacity, not easy to shift, pull out. Because of its chemical bonding through the fixed, not only on the expansion of the substrate will not have damage, but also to strengthen the role of the structure. Construction is simple and rapid, safe and in line with environmental requirements. Is the construction of reinforced concrete structure changes, additional, reinforcement of the most effective method.

 Process characteristics:

 1) fast bearing, anti-aging, anti-tension, anti-fatigue, anti-vibration.

 2) non-expansive, the concrete does not produce extrusion stress, to adapt to a variety of substrates.

 3) The construction is convenient, the level, the top hole are easy to construct and can guarantee the hole is full of glue.

 4) anchoring effect as embedded, low cost.

 Scope of application:

 1) Shearing walls, beams, stigma, slab, continuous beam, foundation, etc. Reinforced anchorage

 2) applies to structural reinforcement, layer, transformation, new and old concrete link.

 Process flow:

 Drilling → hole injection → implantation of reinforcing bar or screw → planting → reinforcement → loading

 3. Sticky steel technical performance

 Features: Structural bonding steel reinforcement is a new building construction reinforcement technology. With a special structural adhesive, the steel plate attached to the surface of reinforced concrete structure, can achieve the original structure and enhance the strength and stiffness of the purpose. The structure is simple and fast. The size and the weight of the reinforcement are small. The structural adhesive will bond the steel plate (or section steel) with the concrete, and combine the reinforcement with the reinforced parts.

 1) crossed to determine the need to stick steel parts;

 2) chisel addition to the surface of the acne layer of concrete, at the same time, the steel drilling, grinding rust;

 3) Cleaning: with compressed air blown surface floating ash, and cleaned with acetone;

 4) Ingredients: First A, B group in the package within the mix, according to the weight ratio of A, B ratio weighing;

 5) Structural adhesive: The compound of the compound, evenly coated on the concrete surface and steel surface, and shall not be mixed with bubbles;

 6) Anchoring: the steel plate directly affixed to the concrete surface coated with structural adhesive to remove the surrounding excess paint, with steel frame fixed;

 7, conservation: fixed, at room temperature curing at least 24h.