METHODS OF REDUCING THE SIZE AND NUMBER OF VOIDS ON FORMED CONCRETE SURFACES.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
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An investigation was conducted to determine the cause of surface voids on formed concrete surfaces and to study methods of reducing their size and number. Form-coating materials were tested on both vertical and overhanging metal and wood forms to determine their effectiveness in reducing surface voids. The results indicate that a amount of vibration of a concrete mixture affects the incidence of surface voids b voids on vertical surfaces can be reduced to an acceptable level by sufficient vibration, but this is not true for sloping surfaces c slick, smooth form coatings may be beneficial in some cases in reducing surface voids on concrete surfaces but their influence is small compared with other factors influencing voids such as consolidation of concrete into forms and variations between concrete batches and d concrete bonding inhibitors are not effective in reducing voids. Author
- Ceramics, Refractories and Glass
- Structural Engineering and Building Technology