A repairing material for ancient building mural ground layer and a preparation method thereof

Abstract

The application discloses a kind of repair materials for ancient building mural ground layer and preparation method thereof, polyacrylamide, ultrafine sepiolite powder, bone glue particles are mixed, and mixture A1 is obtained;After drying, grinding, powder-like substance is prepared;Finally, cotton, cellulose ether, redispersible emulsion powder are mixed and dissolved continuously stirring, and uniform dispersion mixed solution is obtained, the above mixture A1 is adsorbed to the surface of cotton, then drying treatment is carried out, and the repair material for ancient building mural ground layer is prepared.The application mixes polyacrylamide, ultrafine sepiolite powder and bone glue particles in dissolved state, and then dries and grinds, and then is mixed and dissolved continuously stirring with cotton, cellulose ether and redispersible emulsion powder, until the mixed solution is all adsorbed to the surface of cotton, drying treatment, and the repair material for ancient building mural ground layer is prepared, so that the repair material can have good crack repair and reinforcement performance when applied to mural ground layer repair.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of protection and restoration of cultural relics and ancient building murals, and particularly relates to a restoration material for a ground layer of an ancient building mural and a preparation method thereof. BACKGROUND

[0002] An ancient mural is generally composed of a basic support, a ground layer, a lime layer and a pigment layer, as shown in FIG. Figure 1 Due to differences in the production year and region of the mural and the complexity of the existing environment, mural protection is a difficulty in the field of cultural relic protection in China. Due to the long-term changes in a series of factors such as light, temperature and humidity in the environment, the mural support is loosened by water seepage, the mural is hollowed out and falls off, the ground layer is spongy and falls off, and finally the pigment layer is scaled and powdered, which seriously threatens the long-term preservation of the existing mural. Among them, the disease of the ground layer of the mural, commonly known as the "cancer" of the mural, is the most serious and most difficult to treat disease among mural diseases. Related studies have shown that the causes of spongy, cracking and peeling diseases of the mural are that the soluble salts in the basic support and the ground layer material dissolve, migrate in water, and crystallize and accumulate in the mural structure with the evaporation of water. At the same time, these soluble salts will repeatedly migrate in the process of dissolution-crystallization-redissolution-re-crystallization, and when repeatedly crystallized, they will squeeze the surrounding clay particles and loosen them, and different crystallization areas will cause the mural structure to be spongy and loose, and the process will be repeated to form spongy, cracking and peeling diseases.

[0003] For the cracking and peeling diseases of the mural, natural materials such as peach gum, gelatin, alum water and boiled tung oil have good effects on the restoration and reinforcement of the ground layer of the mural. Natural materials are mostly used for temporary reinforcement when the mural is taken off, and the materials and methods cannot prevent moisture and cure the cracking and peeling diseases. Due to the non-renewability of cultural relics and the particularity of cultural relic protection, the selection of the restoration and reinforcement material for the ground layer of the mural has always been a careful choice in the mural protection project. At present, the restoration and reinforcement material for the ground layer of the mural is still being explored, and how to make a more suitable restoration and reinforcement material and method for the ground layer of the mural has become a problem that needs to be solved in the field of cultural relic protection. SUMMARY

[0004] The purpose of the present application is to provide a restoration material for the ground layer of an ancient building mural and a preparation method thereof, to solve the problem of how to form good crack reinforcement and restoration performance in the restoration process of the ancient building mural, to avoid damage to the surface layer caused by the ground layer of the mural, and to maximize the protection of the mural.

[0005] To solve the above technical problems, the present application adopts the following technical solutions:

[0006] The application provides a repairing material for an ancient building mural ground layer and a preparation method thereof.

[0007] S1, polyacrylamide, superfine sepiolite powder and bone glue particles in a dissolved state are mixed to obtain a mixture A1;

[0008] S2, the mixture A1 is dried and then ground to a particle size range of 200-325 meshes to obtain a powder-like substance A2;

[0009] S3, then cotton, cellulose ether and redispersible emulsion powder are mixed and dissolved and continuously stirred until the mixed solution is completely adsorbed onto the surface of the cotton, then the powder-like substance A2 prepared in S2 is added and continuously stirred until the powder-like substance A2 in S2 is adsorbed onto the surface of the cotton, and then drying treatment is performed to obtain the repairing material for the ancient building mural ground layer.

[0010] Preferably, the mixing process in S1 is carried out at a temperature of 60-80 DEG C.

[0011] Preferably, the mass ratio of the substances used in S1 is 1-5 parts of polyacrylamide: 1-5 parts of superfine sepiolite powder: 10 parts of the bone glue particles.

[0012] Preferably, the bone glue particles in S1 are bovine glue bone glue particles.

[0013] Preferably, the mass ratio of the substances used in S3 is 10 parts of the powder-like substance A2: 3-5 parts of cotton: 2-5 parts of cellulose ether: 5-10 parts of redispersible emulsion powder.

[0014] Preferably, the mixing process in S3 is ultrasonic oscillation mixing.

[0015] The application provides a repairing material for an ancient building mural ground layer, which is prepared according to the above preparation steps.

[0016] Compared with the prior art, the application has the following beneficial technical effects:

[0017] The application mixes polyacrylamide, superfine sepiolite powder and bone glue particles in a dissolved state, dries and grinds them, then mixes and dissolves them with cotton, cellulose ether and redispersible emulsion powder, continuously stirs until the mixed solution is completely adsorbed onto the surface of the cotton, and performs drying treatment to obtain the repairing material for the ancient building mural ground layer, so that the repairing material has good crack repairing and reinforcing performance when applied to mural ground layer repairing. BRIEF DESCRIPTION OF DRAWINGS

[0018] The application will be further described below in combination with the description of the drawings.

[0019] Figure 1 Fig. 1 is a schematic diagram of the basic structure of ancient mural.

[0020] Marked as follows: A: pigment layer; B: lime layer; C: ground layer; D: support. DETAILED DESCRIPTION

[0021] The present embodiment discloses a kind of repair materials for ancient architecture mural ground layer and preparation method thereof, wherein, its preparation method includes the following steps:

[0022] S1, polyacrylamide, superfine sepiolite powder and bone glue particles in dissolved state are mixed to obtain mixture A1;

[0023] S2, after drying mixture A1, it is ground to the particle size range of 200-325 mesh, and powder-like substance is prepared;

[0024] S3, then cotton, cellulose ether, re-dispersible emulsion powder are mixed and dissolved continuously stirred, and uniform dispersion mixed solution is obtained, until the mixed solution is all adsorbed to the surface of cotton, then add the powder-like substance prepared in S2, continuously stir, make the powder-like substance prepared in S2 adsorbed to the surface of cotton, then carry out drying treatment, and the repair material for ancient architecture mural ground layer is prepared.

[0025] Through the above technical solution, the present application mixes polyacrylamide, superfine sepiolite powder and bone glue particles in dissolved state, then dries and grinds, and then mixes and dissolves with cotton, cellulose ether and re-dispersible emulsion powder continuously stirred, until the mixed solution is all adsorbed to the surface of cotton, and drying treatment is carried out, to prepare the repair material for ancient architecture mural ground layer, so that the repair material has good crack repair and reinforcement performance when applied to mural ground layer repair.

[0026] As a preferred embodiment, in S1, the mixing process is mixed under the condition that the temperature is 60-80 DEG C. In a more preferred embodiment, in S1, the bone glue particles are preferably bovine glue particles. In another preferred embodiment of the present application, the amount of polyacrylamide is 1-5 parts, and the amount of superfine sepiolite powder is 1-5 parts, relative to 10 parts of the bone glue particles. In a preferred embodiment of the present application, the amount of cotton is 3-5 parts, the amount of cellulose ether is 2-5 parts, and the amount of re-dispersible emulsion powder is 5-10 parts, relative to 10 parts of the dried mixture A1 prepared in S2. In a further preferred embodiment, the mixing process in S3 is ultrasonic oscillation mixing.

[0027] The present application provides a kind of repair materials for ancient architecture mural ground layer prepared according to the preparation method described above. The present application will be described in detail by examples as follows.

[0028] Example 1:

[0029] 1 part of polyacrylamide, 1 part of superfine sepiolite powder and 10 parts of gelatin particles in a dissolved state were mixed and placed in a condition of 70°C to be mixed, thereby preparing a mixture A1;

[0030] The mixture A1 was dried and ground to prepare a powder-like substance;

[0031] Then, 3 parts of cotton, 2 parts of cellulose ether and 5 parts of redispersible latex powder were mixed and dissolved to be continuously stirred to obtain a uniformly dispersed mixed solution, until the mixed solution was completely absorbed onto the surface of the cotton. Then, 10 parts of a powder-like substance prepared in S2 was added, and the powder-like substance prepared in S2 was continuously stirred to be absorbed onto the surface of the cotton. Then, drying treatment was performed to prepare a restoration material S1 for a mural of an ancient building.

[0032] Example 2:

[0033] 3 parts of polyacrylamide, 3 parts of superfine sepiolite powder and 10 parts of gelatin particles in a dissolved state were mixed and placed in a condition of 70°C to be mixed, thereby preparing a mixture A1;

[0034] The mixture A1 was dried and ground to prepare a powder-like substance;

[0035] Then, 4 parts of cotton, 4 parts of cellulose ether and 7 parts of redispersible latex powder were mixed and dissolved to be continuously stirred to obtain a uniformly dispersed mixed solution, until the mixed solution was completely absorbed onto the surface of the cotton. Then, 10 parts of a powder-like substance prepared in S2 was added, and the powder-like substance prepared in S2 was continuously stirred to be absorbed onto the surface of the cotton. Then, drying treatment was performed to prepare a restoration material S2 for a mural of an ancient building.

[0036] Example 3:

[0037] 5 parts of polyacrylamide, 5 parts of superfine sepiolite powder and 10 parts of gelatin particles in a dissolved state were mixed and placed in a condition of 70°C to be mixed, thereby preparing a mixture A1;

[0038] The mixture A1 was dried and ground to prepare a powder-like substance;

[0039] Then, 5 parts of cotton, 6 parts of cellulose ether and 10 parts of redispersible latex powder were mixed and dissolved to be continuously stirred to obtain a uniformly dispersed mixed solution, until the mixed solution was completely absorbed onto the surface of the cotton. Then, 10 parts of a powder-like substance prepared in S2 was added, and the powder-like substance prepared in S2 was continuously stirred to be absorbed onto the surface of the cotton. Then, drying treatment was performed to prepare a restoration material S3 for a mural of an ancient building.

[0040] Comparative Example 1:

[0041] Preparation was carried out according to the preparation method of Example 1, except that S1 and S2 were not carried out, and the bone glue particles were directly used instead of the powdered substance prepared in S2 to prepare the repair material D1 for the ground layer of ancient building murals.

[0042] Comparative Example 2

[0043] Preparation was carried out according to the preparation method of Example 2, except that no cotton and cellulose ether were added to prepare the repair material D2 for the ground layer of ancient building murals.

[0044] Test Example

[0045] The above S1-S3, D1 and D2 were mixed with Chengban soil, slaked lime, sand and water to prepare a mural ground layer repair mortar. The mural ground layer repair mortar was detected for tensile bonding strength according to JG / T220 Technical Specification for Plastering Mortar, and the results are shown in Table 1.

[0046] Table 1

[0047]

[0048] The above examples only describe the preferred modes of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A method for preparing a material for the restoration of the ground layer of ancient architectural murals, characterized in that: Its preparation method includes the following steps: S1. Polyacrylamide, ultrafine sepiolite powder, and bone glue particles in a dissolved state are mixed to obtain mixture A1; the mass ratio of each substance used in S1 is 1 to 5 parts of polyacrylamide: 1 to 5 parts of ultrafine sepiolite powder: 10 parts of the bone glue particles. S2. Dry the mixture A and then grind it to a particle size range of 200-325 mesh to obtain powdered substance A2. S3. Then, cotton, cellulose ether, and redispersible latex powder are mixed and dissolved, and continuously stirred to obtain a uniformly dispersed mixture until the mixture is completely adsorbed onto the surface of the cotton. Then, the powdered substance A2 obtained in S2 is added. After continuous stirring, the powdered substance A2 in S2 is adsorbed onto the surface of the cotton. Then, the mixture is dried to obtain the restoration material for the base layer of ancient building murals. The mass ratio of each substance used in S3 is 10 parts powdered substance A2: 3-5 parts cotton: 2-5 parts cellulose ether: 5-10 parts redispersible latex powder.

2. The preparation method of the material for the restoration of the ground layer of ancient building murals according to claim 1, characterized in that: The mixing process in S1 is carried out at a temperature of 60-80℃.

3. The preparation method of the material for restoring the ground layer of ancient building murals according to claim 1, characterized in that: The bone glue granules mentioned in S1 are bovine bone glue granules.

4. The preparation method of the material for restoring the ground layer of ancient building murals according to claim 1, characterized in that: The mixing process in S3 is ultrasonic oscillation mixing.

5. A restoration material for the ground layer of murals in ancient buildings, characterized in that: The repair material is prepared by any of the preparation steps described in claims 1-4.

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