Permeable formwork sheet "Filter Sheet" (FS Form Method)
The filter sheet (FS form method) is a technique that enhances the appearance and durability of concrete surfaces.
Excess water and air near the concrete formwork are discharged outside the formwork through the filter sheet. There is a construction procedure manual on our company website.
basic information
■The occurrence rate of air bubbles and surface defects on the concrete surface is less than 1/10 compared to using only formwork, demonstrating excellent effectiveness. (※Figure 1) ■The strength development of concrete is accelerated, and a strength increase of about 2 times is expected for surface strength. (※Figure 2) ■According to the results of freeze-thaw tests, the concrete surface using filter sheets shows almost no weakening, with a surface strength retention rate of over 1.1 times, improving freeze-thaw resistance. (※Figure 3) ■The rate of carbonation on the concrete surface can be delayed. (※Figure 4) ■The depth of salt penetration into the concrete surface is suppressed.
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Applications/Examples of results
Excess water and air when pressing the formwork against the concrete are discharged outside the formwork by the filter sheet.
