Additive for hydraulic material is used for job-poured concrete foundation pile, and hydraulic material is used for job-poured concrete foundation pile and job-poured concrete foundation pile

摘要

PROBLEM TO BE SOLVED: To provide an additive for hydraulic material capable of constructing a high strength cast-in-place concrete-based pile and excellent in material non-separability and bleeding inhibition, a hydraulic material and a high strength cast-in-place concrete-based pile.SOLUTION: An additive for hydraulic material for cast-in-place concrete pile contains an A component and a B component, where the A component is at least one kind selected from dialdehyde treated water-soluble alkyl cellulose, dialdehyde treated water-soluble hydroxyalkyl alkyl cellulose or the like, viscosity of 1 wt.% solution of the A component at 20°C is 1,000 to 100,000 mPa s, the treated amount of the A component by dialdehyde is 2 to 10 wt.% to the cellulose, the B component is at least one kind selected from an ester-based antifoam agent, and polyether-based antifoam agent, and weight ratio of the A component and the B component (A/B) is 1 to 99.SELECTED DRAWING: Figure 1