JG/T 24-2000 Synthetic resin emulsion sand wall building paint JG/T24-2000
Some standard content:
JG/T24—2000
This standard adopts JISA6909—1995 "Architectural Decorative Coatings" in a non-equivalent manner. It is a revision of JG/T24—1999 (formerly CB/T5153—1988) "Synthetic Resin Emulsion Sand Wall-Shaped Architectural Coatings". Compared with JG/T24-1999, this standard has made the following revisions in terms of technical content: the three technical indicators of aggregate settlement, color and appearance, and washability in the standard have been cancelled, and four technical indicators of follow-up performance, initial drying crack resistance, impact resistance, and bonding strength after water withdrawal have been added. The curing time of the test plate has been revised.
The test method for drying time has been revised:
The technical requirements for pollutant source powder ash have been revised and the evaluation method for cleaning and stain resistance has been re-established. The products have been classified into internal and external use. This standard was proposed by the Standard and Quota Research Institute of the Ministry of Construction. This standard is under the jurisdiction of China Academy of Building Research, the technical unit responsible for building engineering standards of the Ministry of Construction. This standard was drafted by the Building Decoration Research Institute of China Academy of Building Research, and Beijing Building Materials Products General Factory Fusite Paint (Beijing) Co., Ltd. participated in the drafting.
The main drafters of this standard: Shi Yumei, Zhang Lebian, Mi Jingjiao, Xu Liangji, Xu Xiaojie. The standard is entrusted to the Building Decoration Research Institute of China Academy of Building Research for interpretation. :
Construction Industry Standard of the People's Republic of China Synthetic resin emulsion sand-textured building coating
Sand textured bulding coatiagbased on synthetic resin emulsionJG/ 24 -- 2000
Original sample JG/T 24—1999
This standard specifies the technical requirements, test methods, inspection rules, packaging, marking, transportation and storage of synthetic resin emulsion sand-textured building coatings used on building surfaces.
This standard applies to synthetic resin emulsion sand-like architectural coatings that use synthetic resin emulsion as the main binder and sand, stone particles and stone powder as aggregates to form a stone-textured finishing layer on the surface of buildings. 2 Reference standards The provisions contained in the following standards are valid through reference in this standard. All standards are subject to revision. Parties using this standard should explore the use of the following GB250-1995 Grey scale for assessing discoloration GB/T1728-1979 Determination of drying time of paint and putty films GB/T1733-1993 Determination of water resistance of paint films GB/T1766-1995 Rating method for aging of paints and varnishes At the time of publication of this standard, the versions shown are all possible versions GB/T 1865-1997 Artificial aging and artificial radiation exposure (filtered xenon arc radiation) of paints and varnishes (eqv. ISO11341:1994) GB 3186-1982 Sampling of coating products GB/T 6682---1992
GB/T9265--1988
GB/T 92781988
GB/T 9779-1988
GB/T 9780-1988
Specification and test methods for water used in analytical laboratories Determination of alkali resistance of architectural coatings
Temperature for conditioning and testing of coating specimens (QVIS) 3270:1984) Multilayer architectural coatings
Test method for stain resistance of architectural coatings GB/T 17671-1999
JG/T 23..- 1999
JG/T 25.--- 1999
3 Definitions
Test method for strength of cement mortar (IS) method) (idtISO679:1989) Preparation of test panels for architectural coatings
Test method for freeze-thaw cycle performance of architectural coatings This standard adopts the following definitions:
3.1 Primer
Sealing coating used on the substrate surface,
3.2 Main coating
Thin or thick coating used to form a stone texture on the primer Approved by the Ministry of Construction of the Republic of China on May 10, 2000 121G
Implementation on December 1, 2000
3.3 Topcoat
JG/T 24 --2000
Transparent coating used to improve the weatherability and stain resistance of the main coating 4 Product classification and model
4.1 Synthetic resin emulsion sand-walled architectural coatings can be divided into N type and W type according to their use. N type: internal synthetic resin emulsion sand-walled architectural coatings, W type: external synthetic resin emulsion sand-walled architectural coatings. 4.2 Synthetic resin emulsion sand-walled architectural coatings models are composed of name code, characteristic code: main parameter code and modification serial number: modification serial number (in the order of Chinese pinyin letters A, B; C) main parameter code, adhesion, MPa
Characteristic code: internal type N external type W.
Name code: synthetic resin emulsion sand-walled architectural coating SJT4.3 Marking examplebzxZ.net
Internal synthetic resin emulsion sand-walled architectural coating, adhesion strength 0.70MPa. Marked as: SJTN0.70
External synthetic resin emulsion sand wall building polyester material, bonding strength 0.70MPa, bonding strength after immersion in water 0.50MPa. Marked as: SJTW0.70-0.50
5 Technical requirements
The product should meet the technical indicators specified in Table 1. Table 1
Product technical indicators
State in container
Workability
Coating low temperature storage stability
Hot storage stability of rolling material
Initial drying crack resistance
Drying time (surface dry), h
Water resistance
Impact resistance
Coating temperature change resistance
Stain resistance
Adhesion strength
Standard state
After immersion in water
Artificial aging
Type N (for internal use)
Technical indicators．
Research type (for external use)
No lumps after moving, uniform state
No roundness after spraying
3 tests, no lumps, no condensation and no changes in composition. After 1 month of testing, there is no lumps, no changes, no cracks in the composition.
96h The coating has no bulging, cracking or peeling. Compared with the unblistered part, slight color changes are allowed.
48 h The coating has no bulging, cracking or peeling. Compared with the unblistered part, slight color changes are allowed.
The heat resistance of the coating is the refrigeration and freezing cyclic resistance of the coating! 96h No bulging, cracking or peeling of the coating. Compared with the non-bubbling plate, a slight color change is allowed.
No cracking, peeling or obvious deformation of the coating.
10 times The coating is powdered, cracked, peeled or bulging. Compared with the standard plate, a slight color change is allowed.
≤Level 2 after 5 cycles of test
220:.50.:
500h No cracking, bulging or peeling of the coating. 0 level of rust and color change.
6 Test method
6.1 Sample selection
Perform according to the provisions of GB 3186
6.2 Test environment
Perform according to the provisions of GB/T 9278.
6.3 Preparation of test panels
JG/T 24 --2000
6-3.1 Surface treatment of test panels, test panel dimensions, number and coating amount (thickness) In this standard, except for the bonding strength item, all test panels used are asbestos cement panels. The surface of the test panels is treated in accordance with the provisions of TC/T23, and the test panel dimensions, number and coating amount (thickness) are in accordance with the provisions of Table 2. Table 2 Test panel dimensions, number and coating (thickness) Items
Drying time
Water resistance
Carbon resistance
Acid staining
Artificial chemical resistance
Acid impact resistance
Initial drying cracking
Coating temperature change
Adhesion strength
6.3.2 Preparation of test panel
Test panel size/mm
150×70×3
150×70×3
150×70×3
150×70×3
150X70X3
43C×150X3
20X150X3
206×150X3
70×70×20
(Mortar block)
Synthetic resin emulsion sand wall building material
(Main coating wet film thickness) (3In)
Test panel digital display/piece
In addition to the bonding strength, the primer should be applied on the asbestos cement board of the required specifications according to the requirements of the product manual, and the main coating sample should be sprayed with a spray gun--one coat. For the test panels to be coated with topcoat, the process should be carried out according to the product instructions 24 days after the raw coating is sprayed. 6.3.3 Curing of test panels
Except for the test panels for drying time and initial drying crack resistance, the other test panels shall be cured in the standard test environment for 14 days. 6.4 State in container
The coating shall not shrink after stirring and shall be in a uniform state. 6.5 Construction performance
The main coating shall be sprayed smoothly without difficulty.
6.6 Low temperature storage stability
Put the main coating sample into a plastic or glass container (about 130 mm, about 110 mm in diameter, and a wall thickness of 0.23~0.27 mm) of about 110 mm in height, seal it, and place it in a low temperature box at 5℃±1℃ for 18 hours. After taking it out, place it at 23℃=2℃ for 6 hours. After 3 cycles of this operation, open the container cover and gently stir the sample inside. The sample should not shrink, aggregate or change in composition.
6-7. Thermal stability
Put the main coating test partner into the same container as 6.6· to a height of about 110mm. After sealing, put it into a constant temperature box at 50℃ and 2℃. After 1 month, take it out!
6.8 Initial drying crack resistance
6.8.1 Test instrument:
As shown in circle 1, it is composed of a wire outlet fan, a wind tunnel and a test frame. The wind tunnel surface is square. A fan that can obtain a wind speed of 3/10 or more is used to supply air, and the wind speed is controlled to be (3+0.3) m/s. The air flow velocity in the wind tunnel is measured by a hot ball type or other anemometer. 1213
JG/T 24—2000
6.8.2 Construction shall be carried out in accordance with the product manual. If a primer is used, apply the primer to the surface of the asbestos cement board. After it has been dried for ten days (assessed by the finger touch method), spray the main coating according to the amount specified in the product manual. Immediately place it on the test channel in the wind tunnel as shown in Figure 1, with the test piece parallel to the airflow direction, and take it out after leaving it for 6 hours. Observe the two test panels with naked eyes and there should be no cracks on the surface: 400
1--Test rack position; 2--Wind speed; 3--Fan: 4-Airflow Figure 1 Initial drying crack resistance test instrument
6.9 Drying time
According to the provisions of GB/T1728 surface drying method, test once every 1.h, 6.10 Water resistance
According to the provisions of GB/T1733-1993 Chinese method, the test panels are immersed in the third-level water specified in GB/T6682-1992. After the test, take out the test panel and gently absorb the water on the attached panel with filter paper; after leaving it in a standard environment for 3h, observe the surface state. Two of the three test panels should have no bulging, cracking, or peeling, and a slight color change is allowed compared with the unbubbled part. 6.11 Alkali resistance
According to the provisions of CB/T9265, after the test, take out the test plate and carefully clean it with water, use filter paper to gently remove the water on the surface of the plate, place it in a standard environment for 3 hours, and observe the surface state. Two of the two test plates should have no bulging, cracking, or peeling. Compared with the unbubbled part, a slight color change is allowed. 6.12 Washout resistance
According to the product manual, the surface of the sub-test plate should be coated with the most suitable primer, main coating and top coating. Curing in a standard environment for 14 days. The test piece is placed close to the standard sand CB/T17671 with a thickness of 20mm, and then a spherical base weight with a diameter of (50±2)mm and a weight of 530g±10g is freely dropped from a height of 300mm. Three positions 50mm apart are selected on a test plate for testing. The surface of the test plate should be observed with the naked eye. There should be no cracks, peeling and obvious deformation. 6.13 Coating temperature change resistance
Apply the primer, industrial coating and topcoat to the test board surface in the amount specified in the product manual, and cure in a standard environment for 1 day. Follow the provisions of JG/T25. At least two of the three test boards should be free of powdering, cracking, peeling, bulging and obvious discoloration. 6.14 Adhesion sag
6.14.1 Test instrument
The test instrument consists of self-hardening polyvinyl chloride or metal frame, tensile steel upper clamp, tensile steel lower clamp and other parts. As shown in Figure 2, Figure 3 and Figure 4, the assembly of the upper and lower tensile steel clamps is shown in Figure 5. 6.14.2 Adhesion strength test under standard conditions 6.14.2.1 Place the hard fluorocarbon or metal frame shown in Figure 2 on a 7.0mm×7.0mm×20mm mortar block. Fill the main coating into the mold (volume 40mm×40mm). Use a scraper to smooth the surface and immediately remove the frame to form a test plate. Cure in a standard environment for 14 hours. This test is performed on 5 test plates as a group.
6.14.2.2 During the tenth day of the curing period, place the test plate in a water state: Use a two-component epoxy resin Grease or other high-strength adhesive is evenly coated on the surface of the sample, and the steel upper fixture shown in Figure 3 is placed on it. Add about 1kg of magnetic code; remove the adhesive that has been oozing out of the solidification tube, place the tube for 72 hours, and remove the public base code; after curing for 14 days, on a tensile testing machine, according to the method of GB/T9779, the maximum tensile strength and adhesion strength are measured at a tensile speed of 5mm/min between the vertical squares of the sliding test piece surface. 1215
6.14.3 Adhesion test after flooding
JC/T 24 --- 2000
6.14.3.1. Continue: 614.2.1. Prepare 5 test panels at the same time and cure for 14 days. 6.14.3.2 As shown in Figure 6, place the test piece horizontally on the standard sand GB/T17671 at the bottom of the water tank, and then fill it with water until the water surface is about 5mm away from the surface of the mortar block. After standing for 10 days, take it out, with the side of the test piece facing down, and dry it in a (502)℃ constant temperature box for 24 hours. h, and then placed in a standard environment for 24 h, and then the bonding strength after extended immersion in water is measured according to 6.14.2.2. Hoop (inner dimension 40×40×1): 2- mortar block (70×70×20) Figure 2
Hard polynitride or metal maple
- Steel upper fixture for tensile strength 2- Strand adhesive engraving + 3 sand wall throat difficult to build wire material; 4-
- Mortar block
Figure 3 Steel upper fixture for tensile strength
JG/T 24
—2000
Tensile steel lower clamp
1Steel potential plate: 2--Tensile direction: 3---Tensile steel upper clamp; 4--Steel backing plate 15--Mortar block; 6-Tensile steel lower clamp Figure 5 Assembly of steel lower clamp and steel backing plate 1Sand wall-shaped architectural coating: 2-Mortar block; 3--Water surface 4-Standard sand; 5--Water sugar bottom
Figure 6 Apparatus for bonding strength test after immersion in water
6. 15 Chemical stain resistance
JG/T 24---2000
Apply the primer, main coating and top coating to the test board surface in accordance with the product manual, and maintain in a standard environment according to the requirements. 6.15.1 Fly ash for pollution source: 180~200 mesh accounts for 20%, 200~250 mesh accounts for 30%, 250~325 mesh accounts for 50%. Reflection coefficient: 25%~30%, loss on ignition: 2%~5%. 6.15.21:1 Preparation of fly ash water
Use a large scale to weigh 100g fly ash and 100g water respectively, put them into a wide container and mix them evenly. 6.15.3 Test steps
Take 2 test panels prepared according to 6.3.2, place the test panels with the coating facing downwards, place them horizontally in a 1:1 pulverized coal to water solution for 5 seconds, then take them out and dry them naturally in a standard environment for 2 hours. Then, carry out a flushing test according to the test apparatus and test method in 6.3 of GB/T9780-1988. After 5 cycles, carry out a reverse assessment according to the assessment method in 6.15.4. ：6.15-4 Assessment method
6.15.4.1 The basic aversion card (GB250--1995) is woven from 5 pairs of matte gray small cards, and is divided into 5 levels according to the distinguishable color difference, namely 5, 4, 3, 2, 1. In order to be consistent with the coating aging gray card assessment level method-, 0 to 4 levels (Table 3) are used for assessment (corresponding to the gray card 5, 4.3, 2.1. levels) 6.15.4.2 According to 4.2.1 day visual colorimetric method. Table 3 Assessment level
6. 16 Artificial aging resistance
Perform according to GB/T1865.
Inspection rules
Product inspection is divided into factory inspection and type inspection: 7.1 Factory inspection
Pollution degree (visual inspection)
No pollution, no perceptible pollution (gray card) Very slight, that is, perceptible pollution (gray card level 4) Slight, with obvious pollution (gray card level 3) Moderate, with very obvious pollution (gray card level 2) Severe, that is, with serious pollution (gray card level 1) 7.1.1 The state of the container, workability, drying time, and initial drying crack resistance listed in Table 1 are factory inspection items. They shall be inspected according to the methods specified in this standard. They shall be allowed to be shipped after the inspection is successful and the product certificate is issued! 7.1-2 Sampling method
It is carried out in accordance with the provisions of GB3186.
7. 1.3 Determination of standards
After inspection, if all inspection items meet the technical indicators specified in the technical standards, the batch of products is judged to be qualified products; if one item is unqualified, it is judged to be non-qualified products:
7.2 Type inspection
7.2.1 All technical indicators listed in Table 1 are type inspection items. Type inspection should be carried out in one of the following situations: a) When the finalization of new products is carried out;
b) The main raw materials and dosage of the product or the production process have changed significantly; c) Normal production is carried out at least once a year; d) When the production is resumed after a suspension of more than half a year;
e) When the national technical supervision agency proposes type inspection 7.2.2 Sampling method
It is carried out in accordance with the provisions of GB3186.
7.2.3 Judgment rules
JG/T 24 -.2000
Inspect product performance according to the type inspection items specified in Table 1. When an item fails, re-inspect the failed items of the same batch of products. If the item still fails, the product is judged to be unqualified. After inspection, if all inspection items meet the technical indicators specified in this standard, the product is judged to be qualified.
8 Packaging, marking, transportation and storage
8.1 Packaging,
Primer and topcoat products should be packed in clean, dry, sealed plastic or gold barrels. Solvent-based products must be packed in metal barrels. The main coating product should be packed into a clear, dry, and sealed large-mouth plastic barrel or metal barrel. 8.2 Marking
The packaging container of Yucheng resin emulsion sand wall architectural coating (including primer, main coating, and topcoat) should be marked with the following contents: product name and model, product standard, manufacturer name and address, trademark, manufacturing date, net content, production batch, effective storage period, and precautions. 8.3 Transportation
8.3.1 Water-based products should be handled in the same way as general transportation. 8.3.2 Solvent-based products should be handled in the same way as dangerous goods. 8-3.3 Products should be protected from rain and sun exposure during transportation. 8.4 Storage
8.4.1 During storage, the product should be ventilated and dry, and protected from direct sunlight. The storage temperature should be 5~35℃. 8.4.2 Solvent-based products should be stored in accordance with relevant regulations on dangerous goods. 8.4.3 The product has an effective storage period of 12 months from the date of production, provided that it complies with the conditions of 8.4.1. If it exceeds the effective storage period, it can be inspected according to the items specified in this standard and can still be used if the inspection results meet the requirements. T223
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