| abstract |
[PROBLEMS] Self-flowing water that has sufficiently high workability and curing characteristics even when Portland cement is a main component of a hydraulic component, and in particular, provides high surface hardness and good cured surface finish even at low temperatures. Providing a hard composition. The present invention relates to a hydraulic component comprising 40 to 60% by mass of Portland cement, 15 to 40% by mass of alumina cement and 10 to 30% by mass of gypsum, inorganic powder, fine aggregate, and fluidizing agent. And a self-flowing hydraulic composition containing a setting modifier, wherein the fine aggregate contains less than 5% by weight of coarse particles having a particle diameter of 600 μm or more in 100% by weight of the fine aggregate, And a water absorption is 1.6% or less, and an alumina cement is a self-flowing hydraulic composition whose brane specific surface area is 4000-6000 cm < 2 > / g. [Selection figure] None |