Coating technology: painting construction technology

Core tips: 1 Concrete base inspection (1) check the concrete base, which must be firm and dense (2) check the moisture content of the base course, and use the membrane covering method to check whether it is qualified In case of local leakage, the cause shall be found out and timely treated to ensure the base is dry Or the moisture content shall be less than 6% when tested by the moisture content tester (3) check the carbonation depth of the concrete and the pH value of the concrete base surface, and the pH value shall be less than 10 2 Base treatment (1) grind the surface with grinding wheel or wire brush, remove the residual slurry, floating ash, cement slag, formwork trace, release agent, etc on the surface, and finally clean it with compressed air or vacuum cleaner Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Paint Home News: 1 Inspection of concrete base (1) Inspection of concrete base must be firm and dense (2) check the moisture content of the base course, and use the membrane covering method to check whether it is qualified In case of local leakage, the cause shall be found out and timely treated to ensure the base is dry Or use the moisture content tester to test, the moisture content should be less than 6% ⑶ check the carbonation depth of concrete and the pH value of the surface of the concrete base, the pH value should be less than 10 2 Base treatment ⑴ Use the grinding wheel or wire brush to polish the surface, remove the residual slurry, floating ash, cement slag, template traces, release agent, etc., and finally use compressed air or vacuum cleaner to clean it (2) the surface polluted by oil can be cleaned with solvent and detergent, but the base course can not be damaged (3) use bowl type diamond grinding plate to polish the formwork joint and staggered platform smoothly (including the chiseled joint) without protruding edges and corners; check all concrete surfaces with a 2m ruler, and polish the protruding position with a gap greater than 2mm (4) the loose parts of the base course shall be knocked out, and the sundries in the concrete joints shall be chiseled manually (5) cut the concrete around the embedded parts and steel heads with diamond cutting pieces to a depth of 2-3cm, and cut the exposed embedded parts and steel heads to make them 2cm lower than the concrete surface Remove the rust on the surface of the embedded parts by grinding to gb8923st3, brush two layers of antirust primer, and then use half of epoxy putty to smooth 3 (1) if it is rainy for several days, the moisture content of the base course shall be measured by the concrete hygrometer before coating, and the coating can only be carried out after it is qualified (2) the environmental conditions for coating and coating preparation shall be in accordance with the requirements of the coating product specification (3) pay attention to the cracks, honeycomb, pitted surface, holes, sand holes and pits in the sealing paint coating, and do not miss the coating 4 Fill putty (1) Fill putty 8 hours after completion of sealing paint (2) use putty to fill the pits left after removing the sundries from the chiseled steel bar head, embedded parts, exposed steel bars and cracks V-groove (3) fill the honeycomb, pitted surface, hole and sand hole with putty The putty used for filling shall not be too thick at one time, and shall be filled in 2-3 times with an interval of more than 4 hours (4) the lower side of the formwork joint shall be leveled with putty (5) after 8 hours of putty construction, polish with a grinder and emery cloth as soon as possible 5 Apply intermediate paint (1) Apply intermediate paint after putty polishing (2) after the intermediate paint is applied, the defects on the concrete surface can be easily found by naked eyes The parts to be polished shall be polished, and the low concave parts shall be puttied and then polished, and then the intermediate paint shall be applied The work shall be carried out after the first intermediate coat as far as possible 6 Polyurethane topcoat is sensitive to humidity and shall be applied under specified temperature and humidity conditions 7 For the positions to be repaired, the repair shall be carried out in the order required by the original coating Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,