| abstract |
A bridge web member made of a material having high compressive strength is provided. Cement, silica fume having a BET specific surface area of 15 to 25 m 2 / g, inorganic powder having a 50% volume cumulative particle size of 0.8 to 5 μm, aggregate having a maximum particle size of 1.2 mm or less, high-performance water reduction The total amount of cement, silica fume and inorganic powder is 100% by volume, the proportion of cement is 55 to 65% by volume, the proportion of silica fume is 5 to 25% by volume, and the proportion of inorganic powder is The bridge web member 3 which consists of a hardening body of the cement composition which is 15-35 volume%. [Selection] Figure 1 |