by Concrete release agent, also known as concrete isolation agent or release lubricant, is a substance that is applied to the inner wall of a formwork to provide lubrication and isolation, allowing the concrete to smoothly detach from the formwork during demoulding and maintain its intact and undamaged shape. Compared with the traditional demoulding material oil or waste oil, the demoulding agent has the advantages of easy demoulding, no pollution to the concrete surface, no corrosion to the formwork, simple painting and low price. Shenyang Weide Residential Industrialization Technology Co., Ltd. has rich on-site experience in the construction of PC component factories. After years of research and testing, it is familiar with the selection of release agents and related application technologies. The following is an introduction to this issue:.
The purpose of applying release agent on the inner surface of concrete formwork is to reduce the bonding force between concrete and formwork and make it easy to detach, so as not to be damaged during demolding due to the low initial strength of concrete, maintain the smoothness of the concrete surface, protect the formwork from deformation or rust, facilitate cleaning and reduce repair costs. Therefore, the release agent must meet the following requirements:.
When dismantling the formwork, it is required that the release agent can smoothly detach the formwork from the concrete, keep the surface of the concrete smooth and flat, and ensure that the edges and corners are neat and undamaged..
2. Convenient application, fast molding, and easy cleaning after demolding.
The release agent can be both brushed and sprayed, and the film should form quickly (usually within 20 minutes). Easy to remove after demolding..
3. It does not affect the decorative effect of the concrete surface, and there are no impregnation marks or yellowing discoloration on the concrete surface..
4. Non polluting steel bars and harmless to concrete. It should not affect the gripping force between concrete and steel bars, nor change the setting time of concrete mixtures, and should not contain substances that are harmful to the performance of concrete..
The release agent used for wooden formwork should be able to penetrate the surface of the formwork, maintain and fill the joints of the formwork, and prevent expansion, bulge, cracking and defects caused by the variation of wood and edges after multiple uses of the formwork..
The release agent used for steel formwork should have the effect of preventing rust on the steel formwork and causing rust spots on the concrete surface..
Concrete release agents should have good stability and a longer storage period..
Water soluble release agents are safe to operate, have no oil mist, have little environmental pollution, and have little harm to human health. They are also easy to use and have gradually developed into substitutes for oil-based release agents. After use, it does not affect the secondary processing of the product, such as bonding, color coating and other processing procedures..
Oil based release agents have high costs, are prone to producing oil mist, and have a high degree of air pollution at the processing site, posing a threat to the health of operators. After use, they can affect the secondary processing of components..
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