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In the construction of road traffic markings, hot-melt reflective marking coatings have become the preferred material for high standard roads such as highways and urban main roads due to their excellent wear resistance, reflective performance, and long-term durability. However, to ensure that the construction quality of the marking meets national standards, it is necessary to strictly control the quality requirements and testing standards of the coating. This article will provide a detailed introduction to the key quality indicators and testing methods of hot-melt reflective marking coatings, helping construction teams better control project quality.
1、 Quality requirements for hot-melt reflective marking coatings
- Appearance and color requirements
Color uniformity: The markings should have good visual recognition, uniform color, and no obvious color difference. The white markings should present a high brightness white color, while the yellow markings should maintain a bright and stable yellow color.
Surface flatness: The marking coating should have a uniform thickness, neat edges, and no obvious defects such as bubbles, wrinkles, spots, cracks, or peeling.
Reflective effect: Glass beads should be evenly distributed on the surface to ensure good anti reflective performance of the markings during nighttime driving. - Physical performance requirements
Wear resistance: The marking should have strong wear resistance and remain clear and visible even under long-term vehicle rolling.
Adhesion: There should be good adhesion between the coating and the road surface to prevent the marking from falling off due to vehicle rolling or weather changes.
Anti slip performance: The surface of the marking should have a certain degree of anti slip ability to ensure safe driving in rainy weather. - Optical performance requirements
Initial retro reflective brightness: The marking should be able to effectively reflect the light of the headlights at night, providing clear visual guidance.
Long term reflective retention: After long-term use, the marking should still maintain sufficient reflective effect to avoid a decrease in nighttime visibility due to glass bead detachment or coating aging. - Environmental adaptability
Weather resistance: The marking should be able to withstand natural environmental influences such as sun exposure, rain, ice and snow, and not easily age, discolor or crack.
Temperature stability: In high and low temperature environments, the marking should maintain stable physical properties to avoid deformation or detachment due to temperature changes.
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2、 Testing standards for hot-melt reflective marking coatings
To ensure that the quality of the marking paint meets national standards, strict testing must be conducted before, during, and after construction. The following are the key testing items:
- Appearance inspection
Visual inspection: Observe whether the surface of the marking is flat, whether the color is uniform, and whether there are defects such as bubbles, cracks, and peeling.
Glass bead distribution inspection: Check whether the surface is evenly covered with glass beads and whether there is local accumulation or missing. - Thickness detection
Wet film thickness detection: During construction, a wet film thickness comb gauge can be used to measure the coating thickness to ensure compliance with standard requirements.
Dry film thickness detection: After the marking line is cured, a digital caliper or specialized thickness gauge can be used to measure the dry film thickness to ensure that the coating is uniform and meets the specified value. - Chromaticity and Reflective Performance Testing
Chromaticity detection: Use a colorimeter to measure the color of the marking line to ensure compliance with the chromaticity range specified by national standards.
Reverse reflection brightness detection: Use a reverse reflection measuring instrument to test the reflective performance of the marking line at night, ensuring that the initial reverse reflection brightness meets the standard. - Physical performance testing
Wear resistance test: Evaluate the wear resistance of the marking through friction test to ensure that it is not easily worn out during long-term use.
Adhesion test: Use pull-out test or grid method to test the bonding strength between the marking and the road surface to avoid the risk of detachment.
Anti slip performance test: Use a pendulum friction coefficient meter to measure the anti slip value of the marking surface to ensure safe driving in rainy weather. - Environmental adaptability testing
Weather resistance test: Evaluate the durability of the marking by simulating long-term environmental factors such as sun exposure and rain through accelerated aging tests.
Temperature cycling test: Test the stability of the marking in high and low temperature environments to ensure its adaptability to different climatic conditions.
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3、 Key points of construction quality control
Material acceptance: Before construction, the paint should be sampled and tested to ensure compliance with national standards and project requirements.
Construction process control: Strictly follow the construction specifications, control the melting temperature, coating thickness, and glass bead spreading amount.
On site inspection: Real time inspection should be conducted during the construction process to promptly adjust process parameters if any problems are found.
Completion acceptance: After the completion of the marking construction, a comprehensive inspection should be carried out to ensure that all indicators meet the acceptance standards.
4、 Summary of Quality Requirements and Testing Standards for Hot Melt Reflective Marking Coatings
The quality of hot-melt reflective marking coatings directly affects the safety and service life of roads. Only by strictly controlling the quality of materials, construction techniques, and testing standards can we ensure that the markings maintain their clear, reflective, and wear-resistant characteristics for a long time. As a professional construction team, we should continuously optimize construction techniques, use high-quality coatings, and provide safe and reliable marking guarantees for road traffic.
If you have any questions about the quality inspection or construction process of hot-melt reflective marking coatings, please feel free to contact us at any time, and we will provide you with professional technical support!
Our company is a professional manufacturer of road hot-melt coatings, road retroreflective measuring instruments, and road marking machines. If you are interested, please feel free to communicate with me via email at any time export@toproadtraffic.com
