Patent ID: 7465350

Claim:
A hydraulic composition which includes: (A) 100 parts by weight of cement having a Blaine specific surface area of 2,500 to 5,000 cm 2 /g; (B) 10 to 40 parts by weight of fine particles having a BET specific surface area of 5 to 25 m 2 /g; (C) 15 to 55 parts by weight of inorganic particles having a Blaine specific surface area which is 2,500 to 30,000 cm 2 /g and the surface area of the inorganic particles is larger than that of the cement, the inorganic particles including 10 to 50 parts by weight of inorganic particles (C1) having a Blaine specific surface area of 5,000 to 30,000 cm 2 /g, and 5 to 35 parts by weight of inorganic particles (C2) having a Blaine specific surface area of 2,500 to 5,000 cm 2 /g; a water reducing agent; and water, wherein the inorganic particles (C1) have a Blaine specific surface area larger than those of the cement and the inorganic particles (C2), and the difference of Blaine specific surface area between the cement and the inorganic particles (C2) is not less than 100 cm 2 /g.