1 , the base surface coating requirements

 

General provisions solvent-based coatings and self-leveling construction shall comply with GB50212-91 primary treatment provisions. Particular to emphasize the following factors :

 

( 1 ) the strength of the grassroots face grass surface will be opened if the intensity does not meet the requirements or too low, the cured epoxy mortar coating surface , causing peeling . Live wire brush friction available , it can be used as a hammer to test the strength of concrete surface concrete base , or with a small hammer beating grass surface to determine. Also available on-site to do the bond strength ( greater than 1MPa appropriate ) tests.

 

Degree of drying ( 2 ) grass surface to find the plane because of concrete and mortar construction process contains a lot of water , must be dried to the extent required to be ground when the coating. Grassroots scene can conserve time after construction to simply determine : whether white or measuring surface moisture content ( moisture must be based on the grassroots level has been done , waterproof layer processing ) .

 

( 3 ) " flatness " that there is no grass surface is irregular, uneven phenomenon , the coating layer is quite thin compared with the mortar , grass surface flatness will directly affect the overall apparent quality of the coating. Long live the available surface 2m ruler affixed at the grassroots level , to see the gap that appears in 5mm or less flat surface as a method for the determination of the grassroots , self-leveling coatings for more demanding in terms of the ground as far as possible in a 3mm gap 2m straightedge or less . Construction, by mechanical grinding machine can be further localized " leveling ."

 

Smoothness smoothness ( 4 ) grass surface that is very smooth grass surface coated with a metal trowel , no rough hair surface also affects the adhesion between the film-forming material and grass ; If the grass surface particularly rough time, a grassroots strength may be insufficient , the second you need to consume large amounts of material. Therefore, the roughness of the surface coating suitable final effect is very crucial factor ; multi -site surface treatment of mild sandblasting ( pill ) machine , and absorb dust .

 

2 , painting construction tools

 

The main tools: grinding machine, sandblasting machine , industrial electric vacuum cleaners, portable electric grinder, hammer, chisel , hand-held electric mixer ( main material mixed with a curing agent used ) .

 

Other tools and materials : electronic digital scales ( maximum 20kg), lighting, wiring boards, corner wipe (25cm, 30cm, 36cm), spikes , foaming rollers ( or anti-foaming pin ) , paint brushes, rollers , serrated scraper plates , rubber scraper, surface protection tape, tip sheet , floor wax ( protection ) and so on .

 

3, the main construction process

 

Epoxy Coating Wearresisting major step process , according to China Association of epoxy resin industry experts, mainly as follows :

 

( 1 ) the base surface treatment

 

1 ) Construction of an initial cleaning before cleaning the surface of the grass-roots level , so that the face is fully revealed.

 

2 ) Survey base through on-site inspection tool for face detailed and thorough examination , and make detailed records . Ground construction is hidden project , be sure to investigate the situation clear grass surface , records intact ( broken down multiple sheets ) . Size grass surface to be alone in the drawing indicate the ( accurate to centimeters ) .

 

3 ) handling attachments on the grass surface at the grassroots level , they tend to leave the construction of cement dust , especially new construction surface laitance ( cement free alkaline crystals ) , these attachments required before coating construction power tool or chisel to remove the knife , more thorough approach is mild sandblasting . Grass surface adhesion of the mortar debris, mud , cement and oil foam turn , must completely clear , especially after oil was elected scrub with detergent , use clean water , to be fully dry.

 

4 ) grinding, cleaning the old flatness is not ideal base surface should be polished and overall polish partial engaging way to conduct a thorough sanding , vacuuming.

 

5 ) base surface defects ( from the shell , cracks, gaps ) processing

 

① from the shell surface is a combination of concrete and mortar peel , not attached good condition , if the entire joint surface is stripped , then wipe the surface again after the mortar should be removed, as only part of the peel , then you can have a resin grouting method to Buxiu .Epoxy resin Painting

 

② from the shell cracks often occurred when patching cracks along the electric part of the U-shaped groove cutting machine open about 1cm wide , with a resin mortar to fill the slot.

 

③ gap occurs dimples grass surface part of the state . Approach is to dust and other dirt sweeping clean, smooth resin clay .

6 ) armor construction is mainly to prevent tarnish and edge portions remain completely straight ( or not coated with the boundary part ) should stick surface protection tape. China Association of epoxy resin industry experts stressed that this process must be carefully completed before the primer coat and top coat in construction .

 

( 2 ) the underlying primer and hardener Ingredients rata ( according to the manufacturer 's instruction manual ) with stirring with a hand-held electric mixer evenly in the vacuum clean the surface to mix a good primer grass down on the ground, with rubber paint scraper or roller to apply evenly . Full penetration of the grassroots . Apply the amount is generally 0.15 ~ 0.2kg ( very smooth grass as long as 0.1kg) per square meter. Primer curing time : after confirmation cured state general 12h , proceed to the next step of construction .