COMPOSITION FOR MANUFACTURING CONCRETE PILE

The present invention relates to a composition for manufacturing a concrete pile. The composition is mixed with water, cement, mixture, sand, gravel, and plasticizer. The cement is high early-strength Portland cement; and slag/powder can be additionally mixed with the same. In order to manufacture the concrete pile which realizes compression strength satisfying 1,100 kg/cm^2 in 7 days after manufacturing the concrete pile with the composition, the composition is mixed with: 106-144 kg/m^3 of the water; 403.2-604.8 kg/m^3 of the cement; 1-100 kg/m^3 of the slag/powder; 100.8-151.2 kg/m^3 of the mixture; 513.92-770.88 kg/m^3 of the sand; 913.6-1,370.4 kg/m^3 of the gravel; and 12.6-18.9 kg/m^3 of the plasticizer, with respect to 1 m^3 of the composition. According to the present invention, the present invention can much more improve the compression strength by applying the high early-strength Portland cement and properly mixing water, cement, mixture, sand, gravel, and plasticizer accordingly. In addition, by additionally adding the slag/powder, the manufacturing cost can be reduced by decreasing the amount of cement usage as much as the amount of the added slag/powder. Moreover, the strength can be increased by reducing the mixing amount of water and increasing the mixing amount of plasticizer to supplement the same.