Coating standards: classification and technical requirements of polymer emulsion building waterproof coatings

Core tips: 1 Scope This standard specifies the classification, technical requirements, experimental methods, inspection rules, packaging, marking, transportation and storage of polymer emulsion building waterproof coatings This standard is applicable to all kinds of water emulsion type waterproofing coatings made from polymer emulsion and other additives The applicable products of this standard can be used in building waterproof engineering under non long-term immersion environment such as roof, wall, indoor, etc If it is used for underground and other building waterproof works, its technical performance shall also comply with the relevant technical specifications 2 Reference standard The following standards contain provisions, Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Coatings home news: 1, scope: this standard specifies the classification, technical requirements, experimental methods, inspection rules, packaging, marking, transportation and storage of polymer emulsion building waterproof coatings This standard is applicable to all kinds of water emulsion type waterproofing coatings made from polymer emulsion and other additives The applicable products of this standard can be used in building waterproof engineering under non long-term immersion environment such as roof, wall, indoor, etc If it is used for underground and other building waterproof works, its technical performance shall also comply with the relevant technical specifications 2 The provisions contained in the following standards of the cited standards shall constitute the provisions of this standard by reference in this standard At the time of publication, the editions indicated are all valid All standards will be revised, and parties using this standard shall explore the possibility of using the latest version of the standards listed below GB / t528-1998 determination of tensile properties of vulcanized rubber GB / t625-1989 chemical reagent sulfuric acid GB / t629-1997 chemical reagent sodium hydroxide GB / t3186-1982 sampling of coating products GB / t16777-1997 test method for building waterproof coating 3 Product classification 3.1 is divided into class I and class II according to physical and mechanical properties 3.2 marking 3.2.1 marking method products shall be marked in the following order: product code, type and standard number 3.2.2 marking example 1 type polymer emulsion building waterproof coating is marked as: PEW----- I -----JC/T864----2000 standard type polymer emulsion building waterproof coating code 4, technical requirement 4.1 Appearance products are agglomerated without agglomeration, and become uniform 4.2 physical and mechanical properties the physical and mechanical properties of the product shall meet the requirements of Table 1 Table 1 Physical and mechanical properties No test item index class I, class II, 1 Tensile Strength MPa ≥ 1.01.5, 2 fracture elongation% ≥ 300300, 3 low softness winding, 10 mm rod - 10 ℃, no crack - 20 ℃, no crack, 4 impermeability, 0.3 MPa, 0.5 h impermeability, 5 solid content% ≥ 65, 6 drying time, 4 drying time ≤ 8 7 tensile strength retention rate after aging treatment% heating treatment ≥ 80 ultraviolet treatment ≥ 80 alkali treatment ≥ 60 acid treatment ≥ 40 8 fracture elongation rate after aging treatment% heating treatment ≥ 200 ultraviolet treatment ≥ 200 alkali treatment ≥ 200 acid treatment ≥ 200 9 heating expansion rate% elongation ≤ 1.0 shortening ≤ 1.05 test method 5.1 standard test conditions: temperature (23 ± 2) ℃, relative humidity 45% - 70% 5.2 before test preparation, all samples and instruments shall be placed under standard conditions for 24 hours 5.3 visual inspection: open the container and stir gently with a mixing rod, allowing sedimentation at the bottom of the dissolver If it is easy to mix evenly after mixing, it can be rated as "no caking after mixing, in a uniform state" 5.4 physical and mechanical properties 5.4.1 test apparatus tensile testing machine: the measuring range is 0-500n, the minimum division value is 0.2N, and the tensile speed is 0-500mm / min; slicer: dumbbell shaped type I cutter in accordance with GB / T528; thickness gauge: weight (100 ± 10) g, measuring surface diameter (10 ± 0.1) mm, and the minimum division value is 0.01mm; Electric air blast drying box: temperature control accuracy ± 2 ℃; ultraviolet aging box: 500W straight high pressure mercury lamp, box size 600mm × 500mm × 800mm; Balance: sensitivity: 0.001g; ruler: accuracy: 0.5mm; coating mold: it can be made of flat glass or plastic plate, the specification meets the requirements of 8.1.4 in GB / t16777-1997; impervious instrument: test pressure: 0.1 ～ 0.3MPa; low temperature box: temperature control - 30 ～ 0 ℃, temperature control accuracy ± 2 ℃; glass dryer: desiccant; copper wire mesh: aperture: 0.2mm; Wire rod coater: 250 μ M 5.4.2 sample preparation 5.4.2.1 mix the sample after standing evenly, and pour in 5 without air bubbles 4 1 coating in the specified mold In order to facilitate the film removal, the surface of the mould can be treated with silicone oil or liquid wax before coating The sample shall be coated at least three times during preparation, and the latter coating shall be carried out after the former coating is filmed, and the coating thickness shall reach (2.0 ± 0.2) mm within 72h The prepared sample is cured in standard condition for 168h, demoulded, then dried in drying oven of (50 ± 2) ±℃ for 24h, taken out and cured in standard condition for 168h, then dried in drying oven of (50 ± 2) ±℃ for 24h after film removal, and then placed in standard condition for more than 4H 5.4.2.2 check the appearance of the coating The surface of the sample shall be smooth and flat without obvious bubbles Then cut the required test pieces according to the requirements of Table 2 Table 2 shape, size and quantity of test pieces, Mm quantity, tensile strength and elongation at break no treatment in accordance with GB / T528 dumbbell type I shape 6 heat treatment 6 ultraviolet treatment 6 alkali treatment 120 × 256 acid treatment 6 low tenderness test 100 × 253 water permeability test 150 × 1503 heat expansion test 300 × 303 5.4.3 tensile property 5.4.3.1 tensile property without treatment The test piece shall be placed for more than 4 hours under standard conditions, and the tensile speed shall be 200 mm / min according to 8.2.2 of GB / t16777-1997 5.4.3.2 the tensile property of heat treatment shall be treated according to 8.2.3 of GB / t16777-1997 The tensile property shall be tested according to 5.4.3.1 5.4.3.3 the tensile property of ultraviolet treatment shall be treated according to 8.2.4 of GB / t16777-1997 The distance between the lamp tube and the test piece shall be 470 ~ 500 mm, The space temperature about 50 mm away from the surface of the test piece is (45 ± 2) ℃ The tensile property shall be tested according to the provisions of 5.4.3.4 When the tensile property temperature of alkali treatment is (23 ± 2) ℃, add calcium hydroxide into the solution (LG / L) prepared by chemical pure sodium hydroxide according to the provisions of GB / t629 to make it saturated Put six test pieces into 600 ml solution, The liquid level shall be more than 10 mm higher than the surface of the test piece Take it out after continuous soaking for 168 h, wash it with water, dry it with dry cloth, dry it in (50 ± 2) drying oven for 6 h, take it out and cool it to room temperature After cutting the test piece with the slicer specified in 5.4.1, the tensile property shall be tested according to 5.4.3.5 When the tensile property temperature of acid treatment is (23 ± 2) ℃, The chemical pure sulfuric acid reagent specified in GB / t625 is prepared into sulfuric acid solution (0.2mol / L) Put six test pieces in 600ml solution, the liquid level should be more than 10 mm higher than the surface of the test piece, soak for 168 hours continuously, take them out, wash them with water, dry them with dry cloth, dry them in a drying oven at (50 ± 2) ℃ for 6 hours, take them out and cool them to room temperature, and use 5 4 1 The specified slicer cuts the test piece, and the tensile property is 5 4 3 1 tests are specified 5.4.3.6 the calculated tensile strength of the test results is calculated according to formula (1): P = f / a (1) Where: P - tensile strength, MPa; F - maximum load of the test piece, N; a - sectional area of the test piece, mm2; calculated according to formula (2): a = B × D (2) in the formula: B -- width of working part of test piece, mm D -- measured thickness of test piece, mm tensile strength test result is expressed by arithmetic mean of five test pieces, and the calculation is accurate to 0 1 MPa elongation at break is calculated according to formula (3): l = L1, where: L - elongation at break,%; L1 - distance between markings when the specimen breaks, mm; 25 - distance between markings before stretching, mm The elongation at break test results are expressed by the arithmetic mean of five specimens, and the calculation accuracy is 1% The retention rate of tensile strength after aging treatment is calculated according to formula (4): e = where: e - retention rate of tensile strength after aging treatment,% P1 - tensile strength after aging treatment, MPA P0 - tensile strength without treatment, and the test result of tensile strength retention rate after MPa aging treatment is taken as an integer 5.4.4 low tenderness 5.4.4.1 place the test piece and φ 10 mm round bar in the low-temperature box at the specified temperature for 2 h, open the low-temperature box, quickly hold the two ends of the test piece, bend the round bar 180 ˚ within 2-3 s, and record whether there is crack or fracture on the bending part of the surface of the test piece 5.4.5 water impermeability shall be in accordance with Chapter 11 of GB / t16777-1997 Prepare the sample according to 5 4 2 proceed 5.4.6 the solid content shall be in accordance with method B in Chapter 4 of GB / t16777-1997 5.4.7 drying time 5.4.7.1 the surface drying time shall be in accordance with the method of 12.2.1b in GB / t16777-1997 When preparing the test piece, use the wire rod coater with the specification of 250 μ m to prepare the film 5.4.7.2 the dry time shall be in accordance with the 12.2.1b method in GB / t16777-1997 When preparing the test piece, use the wire rod coater with the specification of 250 μ m to prepare the film 5.4.8 the heating expansion rate shall be carried out in accordance with Chapter 9 of GB / t16777-1997 6.1 inspection rules 6.1 inspection classification product inspection includes delivery inspection and form inspection 6.1.1 delivery inspection items include appearance, tensile strength, fracture elongation, low temperature flexibility, impermeability, solid content and drying time 6.1.2 type inspection items include all technical requirements specified in this standard 6.1.3 has one of the following conditions, Type inspection must b e carried out: a) trial production and finalization identification of new products or products transferred to other factories; b) major changes in raw materials, proportion and process after formal production; c) type inspection shall be carried out once a year in normal production; d) production shall be resumed half a year after the production is stopped; E) large differences between the factory inspection results and the previous type inspection results; f) When the national quality supervision agency puts forward the requirements for type inspection, the delivery inspection shall be conducted in batches of 5t, and the products less than 5T shall be inspected in batches 6.2.2 product sampling shall be conducted in accordance with GB / 3186 When sampling products for delivery inspection and type inspection, a total of 2kg of samples shall be taken for inspection, 6.3.2 single determination: low temperature flexibility and water impermeability test items, if the results of each test piece meet the requirements of Table 1, the item is determined to be qualified; if the arithmetic mean value of test results meets the requirements of Table 1, the item is determined to be qualified 6.3.3 if the test results of appearance and physical and mechanical properties meet the corresponding technical requirements in Chapter 4, the batch of products shall be judged to meet the corresponding types 6.3.4 if two or more indexes fail to meet the requirements of Table 1 in the delivery inspection and type inspection, the batch of products is unqualified; if one of them fails to meet the requirements, it is allowed to re sample the same number of samples in the batch of products for single re inspection, and if the item still fails to meet the requirements, the batch of products is determined as unqualified 7 packaging, marking, transportation and storage 7.1 packaging 7.1.1 products should be stored