Unidirectional keel embedded assembled anti-cracking impermeable permanent formwork

Abstract

The invention provides a unidirectional keel embedded assembled anti-cracking impermeable permanent formwork. The formwork consists of panels and a connecting piece, wherein the transversal surfaces of the panels and the connecting piece are of concave shapes; the connecting piece is fastened with left and right adjacent panels; and the panels and the connecting piece are manufactured by the following materials: ultrahigh toughness cement-base composite materials (UHTCC), nonmetallic fiber mesh grid and short fiber combined reinforced cement-base composite materials, and steel mesh and short fiber combined reinforced cement-base composite materials. After serving as the formwork at the casting stage, the unidirectional keel embedded assembled anti-cracking impermeable permanent formwork is not removed, but serves as a structural protective plate and an outer protective layer and becomes a permanent formwork, and the engineering cost and the construction strength are reduced. The formwork has the characteristics of high tensile ductility and crack control capacity, high damage tolerance, high energy absorption capacity and the like, and the chloride penetration resistance and water penetration resistance of the formwork are higher than those of the common concrete. By adopting the structure of the panels and the connecting piece, the formwork has the characteristics of convenience in manufacturing and use and the capacity of controlling crack developing.

Description

technical field [0001] The patent of the present invention belongs to a building formwork, specifically a high-durability permanent formwork mainly used in hydraulic structures, harbor and sea structures, bridges and culverts, etc. It is used as a formwork during the pouring stage, and is also used as a structure after pouring and molding The protective plate and outer protective layer. Background technique [0002] At present, in the domestic construction field, building structures such as hydraulic structures, harbor and sea structures, bridges and culverts and tunnels usually use wooden formwork, steel formwork and other formwork, which have disadvantages such as large consumption, inconvenient disassembly and assembly, high turnover cost, and low utilization rate. In the traditional structure, the ordinary concrete surface is naturally exposed, and its durability is low. At the same time, design with crack resistance as the control condition is an important feature that...

AI Technical Summary

Problems solved by technology

At the same time, design with crack resistance as the control condition is an important feature that distinguishes hydraulic structures and other types of building structures. The problem of easy cracking of ordinary concrete will not only affect the normal work of hydraulic structures, but also affect their durability and performance. Seriously, it may even affect the safe operation of the structure

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