PURPOSE: To facilitate a transport by a method wherein water in a feed water device is fed through a distributing pipe and a water intake port mounted on a form from a water supply port to a concrete material mixture in a dried state produced by mixing concrete materials other than water and charged in the form to cure the concrete material mixture.

CONSTITUTION: A distributing pipe 4 is connected to a water supply port 3 of a feed water device 1. The distributing pipe 4 is connected to a water intake port 6 mounted on a form 5 or a bag form 8. Water 2 is fed from the feed water device 1 with adjustment of a hydraulic pressure. A concrete material mixture 7 in a dried state produced by mixing concrete materials other than water is charged in the form 5 or the bag form 8. The water penetrates into the concrete material mixture 7 in a dried state by the capillary water suction force of the concrete material mixture 7 or by the capillary water suction force and the hydraulic pressure. The concrete material mixture 7 in a dried state can be cured into concrete by hydration. Therefore, the concrete material mixture in a dried state produced by mixing the concrete materials other than water is not cured.