Primer: low viscosity, strong permeability, used to strengthen the bottom layer of the component surface coating, its role is to penetrate and bond the damaged concrete after chiseling; If the component surface is intact, no coating is required.
Leveling glue: good thixotropic property, used to repair and level the surface defects of reinforced components, its role is to level the concrete surface defects, large damages, concave convex surfaces and corners, so as to facilitate the adhesion of carbon fiber cloth and better play the tensile strength of carbon fiber cloth;
Impregnating glue: low viscosity, good wettability, and certain thixotropic properties. It is used to strengthen the surface of components and the impregnation and pasting of fiber products. Its role is to fully immerse in fiber products, and effectively paste fiber products on the surface of components, so as to strengthen and strengthen components.
one Product features
Good compatibility with carbon fiber;
Strong permeability, which can well penetrate into the concrete surface;
Good aging resistance, water resistance and chemical corrosion resistance;
The cured adhesive layer has excellent physical and mechanical properties, strong and flexible.
two Scope of application
This product has high performance epoxy Fiber like adhesive, which can be used for concrete, steel ceramics 、 Stone , wood components and other substrates and carbon fiber Glass Fiber, basalt fiber, aramid fiber and other fiber fabrics are effectively penetrated and bonded. It is mainly used for reinforcement of buildings.
Construction process
concrete surface treatment
The concrete surface shall be chiseled off the whitewash layer, oil stain, dirt, etc., and then polished off with an angle grinder one ～ 2mm Thick surface layer, the corners of concrete components shall be chamfered. After polishing, use compressed air to blow away the floating dust, and then use cotton cloth dipped in acetone to wipe the surface and keep it dry for standby. If there is crack in the reinforced concrete, it shall be selected according to the crack size HM-120M Filling glue or HM-120L The joint sealant shall be filled before reinforcement.
Primer construction
Primer during construction A 、 B Weigh the two components according to the specified proportion of glue, pour them into a clean container and mix them evenly (when mixing, it is better to mix in the same direction to avoid air bubbles.) Brush the concrete surface evenly with a brush or roller brush. After the glue surface is dry, brush it several times as the case may be, but the coating thickness shall not exceed 0.4mm It shall not be omitted to brush or have flowing, bubbles, etc. after the adhesive is cured (the curing time depends on the temperature on site, and it is better to dry the touch of fingers, generally not less than two Hours), and then proceed to the next process. The glue solution prepared each time shall be used up at one time within the applicable period of the glue.
Leveling construction
The air holes and defects on the concrete surface shall be filled with leveling glue. In case of concave parts, the prepared leveling glue shall be inserted and scraped with a scraper for repair and filling. The parts with height difference such as formwork joints shall be filled with leveling glue to minimize the height difference. The corner shall be repaired into smooth arc with leveling glue, and the radius shall not be less than 20mm 。 The leveling adhesive must be cured (the curing time depends on the temperature on site, and it is better to dry it with the touch of fingers, generally not less than two Hours) before proceeding to the next process.
Sticking of carbon fiber cloth
Evenly apply carbon fiber impregnating glue to the pasted parts, and apply more to the corners. Tighten and align the carbon fiber cloth, stick it, and roll it repeatedly in the same direction with a plastic scraper or roller (the paint roller that removes the outer fuzz can be used) until the rubber exudes. Then apply the impregnating glue evenly on the outer surface of the carbon fiber cloth, and roll repeatedly to make the impregnating glue fully infiltrate the carbon fiber cloth in both directions. In case of multi-layer pasting, the next layer can be pasted after the touch of fingers is dry. If the carbon fiber cloth needs to be lapped, the lap length should not be less than 100mm 。
Curing
After construction twenty-four Prevent rain or damp within hours, and pay attention to protection to prevent hard objects from hitting the construction surface. The average temperature is twenty ～ twenty-five At ℃, solid The melting time shall not be less than three Days; The average temperature is ten At ℃, the curing time shall not be less than seven Days.
test
The actual sticking area of carbon fiber cloth shall not be less than the design area, and the position deviation shall not be greater than 10mm 。 The bonding quality between the carbon fiber cloth and the concrete can be checked by gently tapping the surface of the carbon fiber cloth with a small hammer or pressing the surface of the carbon fiber cloth with hands. The total effective bonding area should not be less than 95% 。 When the hollow area of carbon fiber cloth is not greater than 100cm2 The needle tube glue injection method can be used for repair . When the empty drum area is greater than 100cm2 The carbon fiber cloth at the empty drum should be cut off, and the same amount of carbon fiber sheets should be pasted again. The lap length should not be less than 100mm 。 If necessary, positive tension test can be used for on-site sampling inspection of construction quality.
matters needing attention
Ready to use, used up within the applicable period;
A 、 B If the glue in the component packaging bucket is not used up, cover it separately, and do not expose it to the atmosphere for a long time;
During the construction of primer, the construction environment shall be kept ventilated, open fire is strictly prohibited, and the construction personnel shall take protective measures;
The primer shall be stored in a closed container in a cool and shady environment to avoid sunshine and high temperature;
If it is accidentally eaten or splashed into eyes, please seek medical advice immediately.
seven Transportation and storage
This product should be stored in a cool, dry place for twelve Months. If more than twelve If the physical and mechanical properties meet the standard requirements, it can still be used;
This product is harmless and non dangerous, and can be transported as general chemical building materials. During transportation, the package shall not be damaged, exposed to the sun or rain, and the product shall not be tilted or inverted.
