cover the ground inside the concrete forms with 6-mm polyethylene sheeting. Otherwise you can leave it uncovered. Cover the fill with a layer of 6-mm plastic sheeting. Tie two bands of 1/2-inch ...

Working With GFRP Form Ties Most form-ties within the concrete are designed to be broken off or unscrewed. The remaining holes are then filled with mortar or ready-made plugs. This slows the ...