The requirements of the industrial floor for cement substings and the treatment of common problems

China Coatings network
: industrial flooring on the cement substing requirements and common problems of the treatment.
(1) The overall requirements of the concrete substation
the new concrete flooring before the construction of epoxy flooring needs to be cured for at least 28 days, the moisture content is less than 6%, the ground temperature is more than
5 degrees C
Stains, oil stains, loose particles and floats must be removed if necessary, cracks and other defects in the surface must be repaired, and all concrete substrates must be blasted or polished before bottom coating to provide a clean, hard, rough surface.
(ii) common defects of concrete flooring
1, empty drum detection method: with a small hammer to hit the floor, the empty drum site to mark.
2, surface crack detection method: visual.
3, strength is not enough test method: with strength tester test, strength requirements of more than 20Mpa.
4, surface maintenance is not good, sand powder serious detection method: with metal objects or hard nylon brush scraping the floor.
5, surface oil pollution and other pollutants detection methods: visual inspection.
6, surface moisture detection method: humidity tester.
is laid on the ground with plastic film, around the adhesive cloth glue 8-24 hours, to observe the film bone with or without water drops or the ground with moisture.
Industrial and commercial civil field widely used epoxy resin wear-resistant
floor paint
(iii) defect repair
1, empty drum: the empty drum cut, empty drum cut and remove, re-pour cement mortar or with solvent-free epoxy mortar repair.
2, surface cracks: cut into V-shaped, with epoxy mortar to fill.
3, strength is not enough: remove the strength is not enough concrete, re-pouring.
4, surface maintenance is not good, sand powder serious: sanding, removal of loose parts or re-pouring.
5, surface oil and other contaminants: use de-oil cleaning or gun grilling.
6, the surface is moist: to maintain air circulation or forced ventilation, local areas can be roasted by fire.
(iv) the construction proposal of the moisture-proof layer
For places where the water table is relatively high, the moisture-proof layer is required, otherwise it will cause the epoxy coating bubble and de-layering damage.
construction of moisture-proof layer: method
1: construction of fine stone powder mats on backfill soil, and laying plastic film, mating width is not less than 10CM, and then pouring concrete.
2: Apply 1.5-2mm polymer to concrete substrings
waterproof coating
. A wide range of applications, in some obstacles or uneven ground surface can be used, and then do protective layer.
(v) treatment of the sewn and telescopic seam
the original suture seam should be retained and an elastic PU or elastic epoxy glue may be poured at the interface. Telescopic seams are generally filled with epoxy putty, if the area is too large, can be greater than 30-50 meters interval to retain the seam and fill elastic PU or elastic epoxy glue.