京杭运河二线船闸大部分闸首底板为大体积混凝土厚壁结构物,底板承受荷载大,平面尺度亦大,一般约为42.0×29米,厚达4米左右。为了提高底板抗弯能力,选用较高的混凝土标号,所以水泥用量亦大,加上水泥品种为台湾产600~#硅酸盐早强高标号型,使得早期混凝土内出现了过高的水化 Most of Beijing-Hangzhou Grand Canal second lock main bulkhead floor for the mass concrete thick-walled structure, the floor to bear the load, the plane scale is also large, usually about 42.0 × 29 meters, thickness of about 4 meters. In order to improve the bending resistance of the floor, use a higher concrete label, so the amount of cement is also large, with cement varieties for Taiwan 600 ~ # silicate early strength of high-grade model, making the early concrete appeared excessive hydration