大型高炉基础负温施工方法

Negative Temperature Construction Method for Large-scale Blast Furnace Foundation

鞍钢10号高炉基础为上圆下方筏式、整体式混凝土结构,总体积达2127m^3,-10～16℃冬期施工,故采取防冻害、控温差、抑裂缝的综合蓄热施工方法,即选用低水化热水泥、外部覆盖保温、保湿、测温监控;最终在结构无任何裂缝情况下,结构混凝土强度达到108％fcu,k（设计强度等级）,实现预期的质量控制目标.

The No.10 blast furnace at Ansteel adopts mat foundation with a round top and a square bottom and integral concrete structure with total volume 2127m^3. It is constructed under- 10℃ to16℃ in winter, so select low hydration heat cement, cover outside to preserve heat and monitor mois- ture retention and temperature. This comprehensive heat storage method has the characteristics of frost damage prevention, temperature difference control and crack proof. In the case of without any crack, the intensity of structure concrete is up to designed class 108%fcu. The anticipated quality control pur- pose is achieved.