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A method for repairing cracks in wooden structures using fiber-reinforced concrete

A technology of fiber concrete and wood structure, applied in building maintenance, building structure, construction, etc., can solve problems such as high cost, affecting flatness, affecting the appearance of wood structures, etc., to improve tensile capacity, ensure authenticity, The effect of easy repair

Active Publication Date: 2021-07-02
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above method can improve the overall quality of the wooden structure to a certain extent, it often affects the appearance of the wooden structure during the repair process, especially for flat wooden structures, which will affect its flatness; in addition, the cost of the above reinforcement is relatively high

Method used

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  • A method for repairing cracks in wooden structures using fiber-reinforced concrete
  • A method for repairing cracks in wooden structures using fiber-reinforced concrete
  • A method for repairing cracks in wooden structures using fiber-reinforced concrete

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Embodiment 1

[0033] The fiber concrete used in this embodiment is chopped ultra-high molecular weight polyethylene fiber concrete, its tensile strength is 5MPa, the strain corresponding to the maximum tensile strength is 6%, and its compressive strength is 30MPa. For example and not limitation, the grooves in this embodiment are treated with X-shaped grooves before the cracks are repaired, and the size of the X-shaped grooves is determined according to the width of the cracks. Appropriate values ​​are arranged along the length of the cracks, such as figure 1 shown. After the cracks in this embodiment are strengthened by the X-shaped caulking formed by fiber concrete pouring, it is as follows: figure 2 shown.

[0034] In this implementation, the method of repairing cracks in wooden structures with fiber reinforced concrete is as follows:

[0035] (1) Marking of cracks in the wooden structure body;

[0036] (2) Multiple X-shaped grooves are opened along the length of the crack. The thick...

Embodiment 2

[0043] The fiber concrete used in this embodiment is polyvinyl alcohol (PVA) fiber cement-based composite material, its tensile strength is 3MPa, the strain corresponding to the maximum tensile strength is 3%, and its compressive strength is 35MPa. For example and not limitation, the grooves in this embodiment are treated with dumbbell-shaped grooves before the cracks are repaired. The size of the dumbbell-shaped grooves is determined according to the width of the cracks and arranged along the length of the cracks, such as image 3 shown. In this embodiment, the cracks are reinforced by the dumbbell-shaped caulking formed by fiber concrete pouring. Figure 4 shown.

[0044] In this implementation, the method of repairing cracks in wooden structures with fiber reinforced concrete is as follows:

[0045] (1) Marking of cracks in the wooden structure body;

[0046] (2) Open a dumbbell-shaped groove along the length of the crack, the end of the groove is excessively arc-shaped,...

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Abstract

A method for repairing cracks in wood structures by using fiber concrete, comprising the following steps: 1) Marking cracks in the wood structure body; 2) Grinding several X-shaped or dumbbell-shaped grooves along the cracks; 3) Clearing wood chips and loose parts in the grooves ; 4) pouring fiber concrete in the groove; 5) curing and hardening; 6) surface treatment. The invention utilizes the characteristics of low cost, high tensile strength and easy forming of fiber concrete to replace the wooden structure to bear its stress state at the original crack position, which makes up for the defect of low tensile strength of the wooden structure, and can effectively control cracks at the same time production and development. The invention solves the problem that the original appearance of the main body will be irreversibly changed by the existing method for repairing cracks in the wooden structure, ensures the integrity of the original appearance of the wooden structure, and realizes the improvement of the overall mechanical properties by making the repaired wooden structure a whole, and has the advantages of allowing restoration The post-wood structure has the advantages of improved deformation capacity, extended service life and reduced maintenance frequency.

Description

technical field [0001] The invention relates to the technical field of structure repair and structural reinforcement, in particular to a method for repairing cracks in wooden structures by using fiber concrete. Background technique [0002] Chinese wooden structures have a long history and various types. The ancient Chinese architectural system with wooden structures as the mainstream is also unique in world architecture. It represents China's brilliant material civilization and spiritual civilization, and has extremely high historical, technological and artistic values. However, as a biological material, wood is prone to deformation, cracks, corrosion and other problems under the influence of natural environment and human factors for a long time, which not only affects the safety of building structures, but also affects the value of buildings. [0003] The cracks in the wood structure are mainly caused by the tangential shrinkage rate of the wood being greater than the radi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04G23/02
CPCE04G23/0203
Inventor 余江滔张江頔
Owner TONGJI UNIV
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