In order to ensure the quality of the floor coating, the correct choice of materials, standard construction, and rational use of materials is the basic problem. In addition, there are several aspects that must be taken seriously. For example, through the establishment of "specialized service and management system" or "one-stop" service system, as well as the design of scientific floor application characteristics, the organization of specialized construction teams, correctly master and carry out pre-treatment of construction ground surface, correct construction, Strict quality supervision, etc. Only by combining forces in all aspects can we ensure that the floor coating project achieves the best results.
To this end, the experts specifically introduced the testing standards for floor quality. Paint quality testing equipment can cover product quality testing and coating quality testing, but some equipment and equipment prices are high, some companies may not be able to purchase, but this should not be the reason for quality out of control.
The first thing to test is the adhesion of the coating, including two aspects: First, GB/T9286 "Color paint and varnish, paint film cross-cut test". Among them, the thickness below 500μm can be used in the construction site: the blade spacing is ≤60μm and the blade spacing is 1mm; the 60-120μm blade spacing is 2mm; ≥121μm coating adhesion detection blade spacing is 3mm. The adhesion detection feature is scratch detection. The product coating performance test replaces the physical adhesion data with the sample test. The reasons are the environmental conditions of the paint shop, the controllability of painting and drying, the skill of the operator and the quality of the coating. Consistent. The second aspect of coating adhesion testing is the method for determining the adhesion of GB/T5210 coatings. According to experts, the thickness of the self-leveling floor coating is large, and the allowable blade spacing is difficult to cut through. The hardness of the coating is not suitable for the operation of the knife; the adhesion detection of the thick coating such as the self-leveling coating and the mortar layer is detected. The instrument has improved compared with the past laboratory opening method; the construction industry detects the method of tapping the empty drum sound with a small hammer and the drawing instrument detection to solve the workload of the multi-point test.
Regarding the coating surface hardness and related application performance tests, the following six aspects are mainly included:
First, GB/T6739 "coating film hardness pencil determination method", the laboratory has a pencil hardness tester, manual test on the construction site, only need the corresponding pencil with the required hardness index, plow 5 3mm without plow injury marks, the pencil hardness Represents the hardness of the film being tested;
Second, GB/T1730 <Measurement of hardness of paint film pendulum damping test" for laboratory testing;
Third, GB9273 "paint film without print test" (equivalent to ISO3678 "color paint and varnish without print test"), with Shore A hardness rubber, nylon mesh and a certain weight load test, after 10 minutes with coated surface mesh Blot, or as the time at which the coating leaves no traces;
Fourth, GB9275 "Buckholz indentation test" (equivalent to ISO2815 "Buckholz indentation test"), the indenter payload is 500g ± 5g, the sharp edge of the indenter metal wheel rotation is tested The coating film produced an indentation shape and was observed to be 0.1 mm after being magnified by 20 times. The results of the anti-indentation test are expressed as a function of the reciprocal of the indentation length;
V. GB/T9279 "Scratch test of color paint and varnish" (equivalent to ISO "paint and varnish scratch test");
Sixth, GB/T9280 "Color paint and varnish resistance code test" (equivalent to ISO "paint and varnish resistance code test").
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Label: Coating adhesion Floor Self-leveling Coating quality Coating performance
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