Construction Knowledge: epoxy resin concrete crack repair methods

[ Problem ] students epoxy concrete crack repair method for ?

[ Answer ] Conditions

1, widely used in concrete bridges, housing , water , roads and other projects in the plastic injection repair cracks in large structures deep and penetrating cracks and crack reinforcement winding plastic injection repair.Wholesale masking tape

2 reinforced concrete internal honeycomb , osteoporosis and other defects of plastic injection repair.

3 , glass, steel corrosion, anti-corrosion coating structure construction .

4 , long-term ambient temperature , 70 ℃.

5 , the construction environment dry, ventilated , paste surface clean, dry and free of grease .

6 , the curing temperature is not lower than 5 ℃.

7 , when the ambient temperature is 25 ℃, full cure time is 2-3 days.

Technical performance

1 , epoxy resin ( crack repair ) glue technical performance are in line with national standards, " reinforced concrete structure design specification " (GB ,50367-2006) and the Ministry of Industry Standard " highway bridge reinforcement design specification " (JTG / T, J22-2008 ) A grade adhesive requirements.

Use and construction points

Cracks in the surface treatment A. , B. tune glue , C. Sealing , D. set dispensing nozzle , E. Pressure Glue

A crack deal

For smaller cracks in concrete structures , with a wire brush to remove dust and other tools to crack the surface of the concrete, scum layer and loose dirt, brush floating dust ; wipe clean with alcohol or along the sides of the crack .

For larger volumes of concrete structures or deep cracks , the cracks can be taken along the borehole Glue so that the glue has a wider path into the cracks.

2, set Glue mouth base

In interleaving , cracks and crack wider at the ends of positions, such as cracks must be set Glue mouth. Glue the mouth of the crack spacing according to the size and structure of the form to be. On a crack must be provided with a plastic intake and exhaust , or a plastic mouth . Glue mouth base can be attached using adhesive sealing seam position can also be pasted together in the sealed seam.

Special attention should prevent clogging Glue mouth.Masking tape


3 Sealing

Sealing quality directly affect the effectiveness and quality of grouting should be special attention . Closed cracks can be sealed plastic joints , the recommended proportion with plastic weighed and deploy Sealing glue . Along the crack with a putty knife after repeated evenly coated with a layer of clay scraping , pay attention to prevent small bubbles or Mifengbuyan .

4 , Sealing glue fast curing, firmly bonded , to be with the distribution with the use of automatic pressure grouting technology supporting the use of cracks in the base closure and paste special glue . Sealing intact after 10 minutes to perform plastic injection

5 , the preparation of a continuous infusion of glue dispensing

Dispensing operation should use a dedicated dispensing apparatus. Proportionally formulated resin filling , pour the hose , the device is equipped with a resin filling on the base tightened , loosen the springs dispensing . According to the size of the crack area , or partition group can be single hole filling hole filling . Filling in the cracks can be a light to dark , from the bottom up , from one end to the other end . Resin shortage can be repeated to add. Often using automatic pressure grouting pressure grouting grouting, grouting in ensuring the smooth case , a lower filling pressures and longer filling time , get better filling effect. Demolition grouting plug rotation with glue to the base to prevent overflow .

6 , glue curing

Epoxy resin ( crack repair ) glue should be above 5 ℃ environment curing, curing time depending on ambient temperature.

7 , Glue test results

After the grout grout should examine the effect and quality , where there is not dense and other substandard conditions , should be recharge .Washi tape


Packaging, transportation, storage , and security

1, should be sealed and stored at ambient temperature 5 ℃ -40 ℃ drying , clean warehouse, shall open dumps or rain, the package may not be open long-term storage ; different varieties of two-component adhesives and AB should be clearly marked and placed to avoid promiscuous . From the date of production, effective storage period of 12 months when the packaging intact .

3, this product is not flammable , explosive, toxic and dangerous products , able to transport vehicles in general , the packaging must not be damaged in transit , sun or rain , not tilted or upside down.

4, the product construction personnel shall take the necessary safety precautions ( such as wearing masks , gloves , goggles, helmets , etc. ) , the scene of fire and maintain good ventilation. If you accidentally get on skin or clothing, immediately wipe clean and can be used with plenty of water , if accidentally swallowed or splashed into the eyes , seek medical attention immediately.Sellotape