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预应力后张构件孔道灌浆的目的在于保护预应力筋以防止腐蚀,从而提高预应力构件的耐久性;孔道灌浆后增强预应力筋与其周围混凝土的粘结,提高构件的整体性,对构件的受力也起一定的辅助作用。因此,预应力后张构件的孔道灌浆是整个预应力构件施工过程中最重要的环节之一。本文在调查研究和试验的基础上,提出了关于选择灌浆材料及其性能方面的建议,可供工程实践中参考。1.关于水泥品种的选择。普通水泥与矿碴水
The purpose of pre-stressed post-tensioned grouting is to protect the prestressed tendons to prevent corrosion, thereby improving the durability of the prestressed components. After the grouting, the prestressed tendons reinforce the bond between the prestressed tendons and the surrounding concrete, and improve the integrity of the components. Stress also plays a supporting role. Therefore, the grouting of prestressed post-tensioned members is one of the most important steps in the construction of the entire prestressed members. On the basis of investigation and research and experiments, this article puts forward suggestions for selecting grouting material and its performance, which can be used for reference in engineering practice. 1. About the choice of cement varieties. Ordinary cement and mineral water