Description
Water-Based Release Agent for Tunnel Secondary Lining Concrete Formwork
| Item | Specification |
|---|---|
| Type | Water-based release agent |
| Appearance | Milky |
| PH | 7 |
| Dilution Ratio | 1:20-35 |
| Suitable molds | Tunnel Secondary Lining Tolley |
| Advantages | Tunnel Secondary Lining Trolley Formwork, Bubble-Free,Bright and Uniform Concrete Surface, Non-Adhesion at Grouting Ports |
| Applications | High-speed rail, bridges, tunnel secondary lining trolleys → Suitable for High-Speed Railway, Bridge and Tunnel Secondary Lining Formwork |
| Transport Package | 20kg / 50kg / 200kg / IBC Tote |
AS-8677 is a high-performance water-based release agent specially developed for the concrete formwork system of secondary lining in tunnels. It is widely applied in large-scale infrastructure construction projects such as high-speed railway tunnels, metro projects, highway tunnels, and bridge projects. This product is formulated with environmentally friendly raw materials and advanced emulsification technology. It not only significantly improves the surface appearance quality of concrete but also has excellent demolding performance.
One of the main advantages of AS-8677 is that it can produce a bright white, smooth and uniform concrete surface after demolding. Compared with traditional release agents, it effectively reduces the color variation between concrete sections, ensuring the consistency and aesthetics of the entire tunnel lining. This feature is particularly important for projects with strict visual quality requirements and high construction standards.
AS-8677 also helps to minimize the formation of bubbles, pinholes and surface defects during the concrete curing process. The resulting concrete surface is dense, clean and free of bubbles, reducing the need for additional repair work and improving the overall construction efficiency. In addition, this product prevents the grout from adhering around the grouting ports and the joints of the formwork, making cleaning and maintenance easier while extending the service life of the formwork system.
The release agent provides excellent lubrication and demolding performance, enabling the concrete to be smoothly separated from the steel formwork without damaging the edges or corners. It is applicable to the secondary lining trolley of tunnels and various steel formwork systems. The dilution ratio is as high as 1:20-35, providing excellent cost-effectiveness and economic benefits for large-scale construction projects.
AS-8677 is non-corrosive to steel molds, environmentally friendly, easy to use and meets the requirements of modern architecture. It helps contractors achieve a bright white, uniform appearance, bubble-free surface and high-quality concrete finish, making it an ideal choice for tunnel and infrastructure construction projects around the world.
FAQ
How to Prevent Air Bubbles in Tunnel Secondary Lining Concrete?
Bubbles are one of the most common defects in the secondary lining construction of tunnels. They will affect the appearance and durability of the concrete surface. The use of high-quality water-based release agents such as AS-8677 helps to reduce the air retained during the pouring and curing process. This product forms a uniform demolding film on the surface of the formwork, thus making the concrete surface smoother, denser and free of bubbles after demolding
Why Does Tunnel Concrete Have Color Differences After Demolding?
If the emulsion system of the mold release agent is unstable, resulting in stratification, sedimentation, or oil separation during storage or use, an uneven film layer will form after application. This can lead to color differences, oil stains, or inconsistent gloss on the finished product.
Why is it important for tunnel concrete to appear white，uniform after demolding?
The surface of white concrete has a high reflectivity, which can fully utilize vehicle lights and tunnel lighting.
The bright white surface can alleviate the visual abrupt change when entering a tunnel from a daylight environment and reduce the “black hole effect”. At the same time, it helps to more clearly identify obstacles, lane lines, pedestrians and parked vehicles, reducing the accident rate.
What Is the Best Release Agent for Tunnel Secondary Lining Formwork?
The best release agent should provide easy demolding, prevent concrete adhesion, reduce air bubbles and improve the surface appearance. Water-based release agents are becoming increasingly popular in modern infrastructure projects because they are environmentally friendly and can produce cleaner and brighter concrete surfaces. Aosile AS-8677 is specifically developed for tunnel secondary lining trolley systems and steel formwork applications.
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