耐久性一般Ⅳ

[1113] UTILIZING EXPANSIVE ADDITIVE TO REDUCE THERMAL CRACKING RISK OF RC SLAB ON SINGLE SPAN PC COMPOSITE GIRDER BRIDGE

Arifa Iffat ZERIN¹, 細田暁², 小松怜史², 永田伸幸³ (1.Yokohama National University, 2.横浜国立大学, 3.IHI インフラ建設)

キーワード：Coefficient of Thermal Expansion、Expansive Additive、PC Composite Girder Bridge、PCコンポ桁橋、熱膨張係数、膨張材

The highly durable concrete with blast furnace slag cement and expansive additive were utilized in the RC slab construction of Hikohei PC composite girder bridge. In the present research, FEM full scale structural model of Hikohei PC composite girder bridge has been successfully verified regarding early age thermal stress simulation. Simulated thermal stresses and consequent parametric studies have confirmed that thermal cracking risk is insignificant in PC composite girder RC slab with expansive additive when appropriate construction procedures are ensured avoiding extreme ambient conditions.