超缓凝砂浆在船闸大体积混凝土中的应用

大体积混凝土的约束裂缝是由于混凝土早期强度较低，约束应力超过了混凝土的抗拉能力造成的。文章结合长沙湘江船闸大体积混凝土的施工，介绍超缓凝砂浆的性能，由于其突出的缓凝性，可有效防止层间早期约束，达到减小外在约束应力的目的。长沙船闸工程在采用了大体积混凝土配合比的同时，应用了层间超缓凝砂浆，有效降低了大体积混凝土约束裂缝的产生，取得了较好的效果。

Super Retarded Adhesive Mortar in Mass Concrete for Ship Lock Construction

Constraints of mass concrete cracks in concrete early strength low, constraints stress exceeds the tensile strength of the concrete result of this combination of mass concrete construction of the shiplock on the Xiangjiang River in Changsha, in- troduced the performance of uhra-retarded adhesive mortar, because of its prominent retarded, can effectively prevent early constraints, achieve the purpose of reduce the stress of external constraints. Changsha Shiplock in mass concrete mix at the same time, application-layer Super retarded adhesive mortar, effectively reducing the constraints of mass concrete cracks, and achieved good results.