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Application of polyurethane foam slit filling agent in repairing damp ancientry tomb chamber fresco empty drum

A technology of polyurethane foam and caulking agent, which is applied in the direction of preservation of paintings, decorative arts, building components, etc.

Inactive Publication Date: 2008-01-09
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Polyurethane foam sealant is produced by Shanghai Fengjing Polyurethane Co., Ltd. It has the advantages of light weight and strong bonding ability. It is mainly used to fill large-aperture irregular joints in new buildings and renovation projects, and can also be used to fill windows. The gap between the frame, the door frame and the wall and ceiling plays the role of cementing, insulating, waterproofing and cracking prevention, but there are no reports on the application of polyurethane foam caulking agent in repairing the hollowing of damp ancient tomb murals

Method used

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  • Application of polyurethane foam slit filling agent in repairing damp ancientry tomb chamber fresco empty drum
  • Application of polyurethane foam slit filling agent in repairing damp ancientry tomb chamber fresco empty drum
  • Application of polyurethane foam slit filling agent in repairing damp ancientry tomb chamber fresco empty drum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The method of using polyurethane foam caulking agent to repair the hollow drum of damp ancient tomb murals at a relative humidity of 70% is as follows:

[0021] (1) Use a scalpel to cut a circular hole with a diameter of 5 mm in the damaged crack or secondary part of the mural, use an endoscope to observe the internal conditions between the mural ground and the wall, and use a vacuum cleaner to vacuum the mural hollow. Clean up debris such as sand, broken ground, and debris.

[0022] (2) Preparation of reinforcing agent

[0023] Add Remmers300 and absolute ethanol at a volume ratio of 1:4 into a beaker, stir and mix evenly to prepare a reinforcing agent. Remmers300 is produced by Remmers, Germany.

[0024] (3) Use a 100mL syringe to drop the reinforcing agent to reinforce the floor and wall inside the mural hollow, so that the strength of the mural layer and the loose parts of the wall will increase.

[0025] (4) After the reinforcing agent is cured, use a sponge to w...

Embodiment 2

[0029] The method of using polyurethane foam caulking agent to repair the hollow drum of damp ancient tomb murals at a relative humidity of 55% is as follows:

[0030] In step (5), a polyurethane foam caulking agent spray gun is inserted into the opening of the mural, and the polyurethane foam caulking agent is injected into the hollow drum, and the filling amount is 40% of the inner volume of the mural hollow drum. Other steps are the same as in Example 1.

Embodiment 3

[0032] The method of using polyurethane foam caulking agent to repair the hollow drums of damp ancient tomb murals at a relative humidity of 100% is as follows:

[0033] In step (5), a polyurethane foam caulking agent spray gun is inserted into the opening of the mural, and the polyurethane foam caulking agent is injected into the hollow drum, and the filling amount is 50% of the inner volume of the mural hollow drum. Other steps are the same as in Example 1.

[0034] In order to determine the application of polyurethane foam caulking agent in repairing the hollow drums of damp ancient tomb murals, the inventors used polyurethane foam caulking agents to carry out a large number of laboratory tests and trials for repairing the hollow drums of wet ancient tomb murals. The various test conditions are as follows:

[0035] Test instruments: LRO16A aging test box, produced by Chongqing Yinhe Test Instrument Co., Ltd.; TD-6001B tensile testing machine, produced by Jiangdu Tengda Test...

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Abstract

A polyurethane foaming gap filler and its use in repairing ancient mural hollow drum in wet coffin chamber are disclosed. It adopts salt corrosion test, damp-heat ageing test, freeze-thaw circulation test, adhesive strength test, tensile strength test, shearing strength test, porous and air-permeability test, and artificial accelerating ageing test. It has high soluble slat content, the adhesive strength minimum value is 0.004 MPa, and greater the weight of mural. It has better binding effect and can be used to protect relics.

Description

technical field [0001] The invention relates to the application of polyurethane foam caulking agent, in particular to the application in the field of repairing damp ancient mural hollows. Background technique [0002] Hollowing is one of the widely distributed diseases of murals. It means that the surface of murals is bulged or cracked due to certain influences. In severe cases, the murals fall off due to the influence of the mural’s own gravity. From the 1970s to the 1990s, the restoration and reinforcement of hollow murals in my country generally adopted the method of exposing-repairing-reinforcement-reposting, or the method of temporary anchoring and reinforcement. The former caused greater damage to the murals due to block cutting, and the latter seriously blocked the picture due to the use of larger anchor heads. Although these two methods have played a good protective role in rescuing hollow murals, they also exposed There are many problems, and often there are sequel...

Claims

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Application Information

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IPC IPC(8): C08L75/04E04B1/68B44D7/00
Inventor 李玉虎王永进
Owner SHAANXI NORMAL UNIV
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