1. The main equipment 1 tensile tester; 2 not pound steel slot plate; 3 aluminum plate; 4 anticorrosion painted asbestos cement plate; 5 stainless plate partition; 6 electric blast drying box; 7 ultraviolet aging box; 8 glazed tile.
2. Test procedure
(1) Preparation of test pieces. Clean the stainless steel channel plate and the partition strip with a separate oil brush, and paint the floor of Shenzhen parking lot. Then take two aluminum plates (thick paint) or asbestos cement plate (thin paint) into the tank, small on both sides of the slot plate. The groove is inserted into the stainless steel partition so that the aluminum plate or the asbestos cement plate is butt-fixed in the middle of the groove plate, and the gap between the two plates is not greater than 0.05 mm. Shenzhen anti-corrosive floor paint and then take the enamel coating (26 ± 0. l) g or thin coating (8 ± 0. l) g, graded on the test board, Shenzhen epoxy floor paint After each application, put it in a drying oven and dry it at (40±2)°C for 4h~8h. After the last application, it should be dried in the drying oven for 24h. While hot, cut the sample around with a sharp knife to make the test piece. Separated from the grooved plate and the spacer, 12 samples were prepared for each sample.
(2) Tensile test without treatment. Place the test piece under standard conditions for 2 hours. Then install the test piece in the fixture of the tensile machine. Record the value (L.) indicated on the scale of the tensile machine. Stretch the sample at a certain tensile speed until the crack or peeling occurs. Until this time, the scale value (M) was recorded and the reading was accurate to 0. 5mm.
(3) Measurement of tensile properties after heat treatment. Shenzhen floor paint. Place the test piece on the glazed tile, and place it together in a drying oven (70 ± 2) °C. The distance between the test piece and the wall of the drying box shall not be less than 50mm. The mercury ball of the center of the test piece and the thermometer shall be On the same horizontal line, take out after 168h of constant temperature, immediately observe whether the specimen has any undesired changes such as turbulence, foaming, etc. If there is any change, the test shall be suspended. If there is no change, the test shall be carried out according to the provisions of the test piece.
(4) Measurement of tensile properties after ultraviolet treatment. Put the test piece on the glazed tile, and then put 500W straight tube high-pressure mercury lamp ultraviolet irradiation box together, the lamp tube is parallel to the bottom of the box, the distance from the test piece is 47mm~50mm, and the space temperature is about 50mm from the surface of the test piece. (45 ± 2) °C, after constant temperature irradiation for 240 hours, according to the provisions of (2) test.
(5) Stretchability after alkali treatment. Paraffin rosin liquid (paraffin wax is added to 10% of rosin) and the surface of the specimen is coated with a paraffin rosin solution. The specimen is soaked in a saturated Ca(OH)2 solution at a standard temperature, and the liquid surface is higher than the surface of the specimen. 10mm or more, continuously soaked for 168h, rinse thoroughly with water, and dry with a cloth. Observe the surface of the test piece for any unusual changes such as bubbling, swelling, or spalling. If any change is found, suspend the test. If no change is found, follow the instructions in (2). experimenting.
2. Test procedure
(1) Preparation of test pieces. Clean the stainless steel channel plate and the partition strip with a separate oil brush, and paint the floor of Shenzhen parking lot. Then take two aluminum plates (thick paint) or asbestos cement plate (thin paint) into the tank, small on both sides of the slot plate. The groove is inserted into the stainless steel partition so that the aluminum plate or the asbestos cement plate is butt-fixed in the middle of the groove plate, and the gap between the two plates is not greater than 0.05 mm. Shenzhen anti-corrosive floor paint and then take the enamel coating (26 ± 0. l) g or thin coating (8 ± 0. l) g, graded on the test board, Shenzhen epoxy floor paint After each application, put it in a drying oven and dry it at (40±2)°C for 4h~8h. After the last application, it should be dried in the drying oven for 24h. While hot, cut the sample around with a sharp knife to make the test piece. Separated from the grooved plate and the spacer, 12 samples were prepared for each sample.
(2) Tensile test without treatment. Place the test piece under standard conditions for 2 hours. Then install the test piece in the fixture of the tensile machine. Record the value (L.) indicated on the scale of the tensile machine. Stretch the sample at a certain tensile speed until the crack or peeling occurs. Until this time, the scale value (M) was recorded and the reading was accurate to 0. 5mm.
(3) Measurement of tensile properties after heat treatment. Shenzhen floor paint. Place the test piece on the glazed tile, and place it together in a drying oven (70 ± 2) °C. The distance between the test piece and the wall of the drying box shall not be less than 50mm. The mercury ball of the center of the test piece and the thermometer shall be On the same horizontal line, take out after 168h of constant temperature, immediately observe whether the specimen has any undesired changes such as turbulence, foaming, etc. If there is any change, the test shall be suspended. If there is no change, the test shall be carried out according to the provisions of the test piece.
(4) Measurement of tensile properties after ultraviolet treatment. Put the test piece on the glazed tile, and then put 500W straight tube high-pressure mercury lamp ultraviolet irradiation box together, the lamp tube is parallel to the bottom of the box, the distance from the test piece is 47mm~50mm, and the space temperature is about 50mm from the surface of the test piece. (45 ± 2) °C, after constant temperature irradiation for 240 hours, according to the provisions of (2) test.
(5) Stretchability after alkali treatment. Paraffin rosin liquid (paraffin wax is added to 10% of rosin) and the surface of the specimen is coated with a paraffin rosin solution. The specimen is soaked in a saturated Ca(OH)2 solution at a standard temperature, and the liquid surface is higher than the surface of the specimen. 10mm or more, continuously soaked for 168h, rinse thoroughly with water, and dry with a cloth. Observe the surface of the test piece for any unusual changes such as bubbling, swelling, or spalling. If any change is found, suspend the test. If no change is found, follow the instructions in (2). experimenting.
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