Unidirectional keel embedded assembled anti-cracking impermeable permanent formwork

An embedded and permanent technology, which is applied in the field of high-durability permanent formwork, protective panels and outer protective layers, can solve problems affecting the safe operation of structures, affecting durability and service life, and ordinary concrete is easy to crack. High crack control ability, improved durability and service life, and shortened construction time

Active Publication Date: 2012-10-10
ZHEJIANG UNIV
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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 cracki

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  • Unidirectional keel embedded assembled anti-cracking impermeable permanent formwork
  • Unidirectional keel embedded assembled anti-cracking impermeable permanent formwork
  • Unidirectional keel embedded assembled anti-cracking impermeable permanent formwork

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Embodiment Construction

[0021] The following is a further description of the specific implementation of the one-way keel-embedded, crack-proof and seepage-proof permanent formwork provided by the present invention with reference to the accompanying drawings.

[0022] The one-way keel embedded permanent formwork of this embodiment includes six panels 1 and three connectors 2 . Such as Figure 4 As shown, the following describes the implementation method in the above situation.

[0023] 1. Use ultra-high toughness cement-based composite materials to make panels and connectors, including six panels 1 and three connectors 2. The ultra-high toughness cement-based composite material UHTCC material used to make the formwork has a tensile strain capacity of more than 1%, and the crack width under the ultimate tensile strain is less than 100 μm, and has excellent carbonation resistance, freeze-thaw resistance, and impermeability. The characteristics of impact toughness. The weight ratio of the components o...

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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...

Claims

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Application Information

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IPC IPC(8): E02B1/00E01F5/00C04B28/06C04B28/04
Inventor 李庆华徐世烺黄博滔
Owner ZHEJIANG UNIV
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