Toning and repairing material for marble stone cultural relics and application of toning and repairing material

Abstract

The invention discloses a toning repair material for marble rock cultural relics and application of the toning repair material, and relates to the technical field of marble rock repair. Aiming at the property and color change of marble, the cultural relic color-mixing repairing material obtained by blending sintered material ginger nut, quartz sand, porcellanite, fly ash, basalt powder and green volcanic stone powder as natural colored raw materials is natural in material and stable in color, and is not easy to discolor after being repaired in an outdoor environment for a long time; and the natural colored raw material and the repairing and shaping material or the natural raw stone have good binding force, so that the cultural relic toning and repairing material is relatively good in connection stability and not easy to fall off, and the risk of damage to the cultural relics due to repeated repairing of the cultural relics is reduced. Besides, by controlling the proportion of all the raw materials, multiple colors similar to the marble texture color can be obtained through rapid modulation, the marble texture toning and repairing difficulty is lowered, a rapid compounding basis is provided for marble texture toning, and the repaired area and the surrounding raw stone are harmonious and unified in color.

Description

Technical Field

[0001] The invention relates to the technical field of marble stone restoration, and in particular to a coloring restoration material for marble stone cultural relics and application thereof. Background Art

[0002] Marble is a metamorphic rock with a carbonate mineral content (mainly calcite and dolomite) greater than 50%. It is formed by regional metamorphism or thermal contact metamorphism of carbonate rocks such as limestone and dolomite. Due to the different impurities and metamorphic conditions of the original rock, marble may contain a small amount of characteristic metamorphic minerals such as serpentine, tremolite, diopside, scapolite, phlogopite, forsterite and wollastonite. It generally has a granular metamorphic structure and a massive structure, and sometimes a banded structure. Marble is named after its abundant production in Dali County, Yunnan Province, my country. Usually, white and gray marble are the majority. Among them, those with uniform texture, fine grains and white are also called white marble. White marble is deeply loved by people because of its warm quality. In addition, Dashiwo, Fangshan, Beijing has a unique white marble quarry. Therefore, white marble has also become the first choice of stone components in the royal palaces, mausoleums and gardens of the Ming and Qing dynasties.

[0003] Marble-like stone cultural relics are widely used in ancient architectural stone components and stone tablets and stone carvings, and most of them are preserved outdoors. Stone cultural relics are more prone to weathering, cracking, and incompleteness, which not only affect the safety and stability of cultural relics, but also cause inestimable losses to the various values ​​of the cultural relics themselves. Therefore, using safe and effective repair and shaping methods to protect and repair the above-mentioned types of diseases can maximize the local stability of cultural relics, thereby protecting the historical, artistic and scientific value of cultural relics.

[0004] Because rocks are affected by physical and chemical factors during the process of diagenesis, the same type of stone will have richer color changes in different locations (such as the difference between white and gray in marble). In addition, after the cultural relics are carved, they are kept outdoors for a long time and are affected by wind, rain, snow and sunlight, and the surface of the cultural relics will also have certain color changes (such as the surface of the stone in the area that has been eroded by rain for a long time will become darker and yellower). Therefore, in the process of restoring marble cultural relics, different restoration areas of the same type of stone need to be allocated with restoration materials of similar colors to achieve a coordinated and unified overall restoration effect of the cultural relics.

[0005] The current restoration method includes reshaping, shaping and coloring the area to be restored to ensure the overall restoration effect of the cultural relics is coordinated and unified. The existing coloring process mainly uses chemical synthetic pigments such as Chinese painting pigments and watercolor pigments for coloring. These materials have poor aging resistance under outdoor natural climate conditions. After a period of restoration, they are prone to discoloration or falling off, which is inconsistent with the color of the surrounding original stones, affecting the appreciation and protection of cultural relics. The area to be restored needs to be repaired repeatedly, which not only increases the cost of restoration, but also may cause irreversible damage to the cultural relics during each restoration process, which is not conducive to the protection of cultural relics.

[0006] In view of this, the present invention is proposed. Summary of the invention

[0007] The purpose of the present invention is to provide a color-adjusting and restoration material for marble cultural relics and application thereof.

[0008] The present invention is achieved in that:

[0009] In a first aspect, the present invention provides a coloring and restoration material for marble cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, burned gravel: 5% to 25%, quartz sand: 35% to 50%, white clay: 25% to 45%, fly ash: 0% to 15%, basalt powder: 0% to 5% and green volcanic stone powder: 0% to 5%.

[0010] The color value parameters of the burned granite include: L=73.5~74, a=4~5, b=14~15.

[0011] The color value parameters of quartz sand include: L=88.5~90, a=0.1~0.2, b=2.5~3.5.

[0012] The color value parameters of white clay include: L=82~83, a=0.1~1, b=6~7.

[0013] The color value parameters of fly ash include: L=68.5~69.5, a=0.1~1, b=0.5~1.5.

[0014] The color parameters of basalt powder include: L=16.3-17.3, a=10-10.5, b=15-16.

[0015] The color parameters of green volcanic stone powder include: L=77.3~78.3, a=-4~-5, b=12~13.

[0016] In a second aspect, the present invention provides an application of a material as described in any of the aforementioned embodiments in marble-like stone repair.

[0017] Preferably, the material application method comprises mixing the raw materials of the material with water in proportion and then applying the mixture to the surface of the marble-like stone.

[0018] Preferably, the mass ratio of the raw material to water is 1:0.35-0.4.

[0019] The present invention has the following beneficial effects:

[0020] The present invention provides a color-adjusting restoration material for marble cultural relics and its application. According to the properties and color changes of marble, the color-adjusting restoration material for marble cultural relics is obtained by mixing natural colored raw materials. The cultural relic color-adjusting restoration material is natural, stable in color, and not easy to change color in an open-air environment for a long time after repair, and has good color stability; and the natural colored raw materials have good bonding force with the repairing materials or natural raw stones, so that the connection stability of the cultural relic color-adjusting restoration material is better, not easy to fall off, and the risk of damage to the cultural relic by repeated repair of the cultural relic is reduced. In addition, by controlling the proportion of each raw material, a variety of colors similar to the color of marble can be quickly modulated, the difficulty of marble color-adjusting restoration is reduced, and a basis for rapid compounding is provided for marble color-adjusting, and the color-adjusting restoration of marble of different colors is realized, and the color of the repaired area and the surrounding raw stones is harmonious and unified. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a color difference diagram of marble in different locations;

[0023] Figure 2 This is a color difference diagram of marble in different locations;

[0024] Figure 3 A color comparison diagram of the color-adjusting restoration material for marble cultural relics provided in Example 9 of the present invention and the corresponding marble original stone;

[0025] Figure 4 This is a comparison diagram before and after restoration of the color-adjusting restoration material for marble stone cultural relics provided in Example 6 of the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially.

[0027] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0028] First of all, it should be noted that the color value parameters L, a and b mentioned in the present invention are color representation parameters in the CIELAB color space, which is a device-independent color space and is widely used in color theory and color difference calculation.

[0029] L stands for lightness, which indicates how light or dark a color is. L values ​​usually range from 0 (black) to 100 (white), with lower values ​​representing darker colors and higher values ​​representing lighter colors.

[0030] a represents the range from green to red, with positive values ​​indicating a reddish color and negative values ​​indicating a greenish color.

[0031] b represents the range from blue to yellow, with positive values ​​indicating yellowish color and negative values ​​indicating bluish color.

[0032] By controlling the values ​​of L, a and b of each substance (raw material or coloring and restoration material of marble cultural relics), the color uniformity of each substance can be ensured; and the L, a and b parameters can be directly detected by equipment, such as using a spectrophotometer, and the detection method is simple and easy to obtain.

[0033] In a first aspect, the present invention provides a coloring and restoration material for marble cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, burned gravel: 5% to 25%, quartz sand: 35% to 50%, white clay: 25% to 45%, fly ash: 0% to 15%, basalt powder: 0% to 5% and green volcanic stone powder: 0% to 5%.

[0034] By compounding with natural colored raw materials such as burnt gravel, quartz sand, white clay, fly ash, basalt powder and green volcanic stone powder, the color stability of the cultural relic coloring and restoration materials is better, and it is not easy to change color even if it is placed in an open-air environment for a long time after restoration; and the natural colored raw materials have good bonding with the repair materials or natural raw stones, so that the connection stability of the cultural relic coloring and restoration materials is better and it is not easy to fall off, reducing the risk of damage to the cultural relics caused by repeated restoration of cultural relics. In addition, by controlling the proportion of each raw material, a variety of colors similar to the color of marble can be quickly adjusted, which reduces the difficulty of marble coloring and restoration, provides a basis for rapid compounding for marble coloring, and realizes the coloring and restoration of marbles of different colors, and the color of the repaired area is harmonious and unified with the surrounding raw stones.

[0035] The burnt gravel is the main cementitious material of the repair material, which mainly plays a bonding role and can also be used for color adjustment. The content of the burnt gravel can be, for example, any value among 5%, 7%, 9%, 11%, 13%, 15%, 17%, 19%, 21%, 23% or 25%, or a range between any two values.

[0036] In order to ensure the overall uniformity of the color of the marble stone cultural relics restoration materials, the color value parameters of the fired gravel include: L = 73.5 ~ 74, a = 4 ~ 5, b = 14 ~ 15.

[0037] Quartz sand is a filling material of the repair material, which mainly reduces the shrinkage of the repair material and can also be used for color adjustment. The content of quartz sand can be, for example, any value among 35%, 37%, 39%, 41%, 43%, 45%, 47%, 49% or 50%, or a range between any two values.

[0038] In order to ensure the overall uniformity of the color of the marble stone cultural relics restoration materials, the color value parameters of quartz sand include: L = 88.5 ~ 90, a = 0.1 ~ 0.2, b = 2.5 ~ 3.5.

[0039] The function of white clay is to increase the plasticity of the repair material and also to adjust the color. The content of white clay can be, for example, any value among 25%, 27%, 29%, 31%, 33%, 35%, 37%, 39%, 41%, 43% or 45%, or a range between any two values.

[0040] In order to ensure the overall uniformity of the color of the marble stone cultural relics restoration materials, the color value parameters of white clay include: L=82~83, a=0.1~1, b=6~7.

[0041] Since the overall color of marble is white and gray, the amount of colorful natural colored raw materials added is relatively small. It is mainly composed of white burned granite, quartz sand and white clay, mixed with gray fly ash, black basalt powder and green volcanic stone powder to obtain more different colors of marble stone cultural relics. Coloring restoration materials are beneficial to the restoration of marble cultural relics of various colors.

[0042] Fly ash is used as a gray rock color to adjust the color of cultural relics restoration materials. Since the main colors of marble are white, gray and yellow, the amount of fly ash used has a great influence on the color accuracy of marble. For example, the content of fly ash can be any value among 0%, 2%, 4%, 6%, 8%, 10%, 12%, 14% or 15%, or a range between any two values.

[0043] The higher the grayness of the surrounding marble, the higher the fly ash content can be; the lower the grayness of the surrounding marble, for example, when it is white or yellowish, the fly ash content can be reduced. Even for some whiter or yellower marble, such as white marble, no fly ash can be added to adjust the color of the cultural relics restoration material.

[0044] Specifically, in order to ensure that the fly ash is controlled within the above range to obtain a color that is coordinated and unified with the surrounding raw stones, the color value parameters of the fly ash include: L=68.5~69.5, a=0.1~1, b=0.5~1.5.

[0045] Basalt powder is used as black rock color to adjust the color of cultural relic coloring and restoration materials, for example, it can reduce the darkness of the color of cultural relic coloring and restoration materials to match the color of the surrounding marble raw stones. Therefore, the content of basalt powder can be, for example, any value of 0%, 1%, 2%, 3%, 4% or 5%, or a range between any two values.

[0046] Since the overall color of marble is relatively light, it is not advisable to add too much basalt powder. However, for some darker marble stones, the content of basalt powder can be increased to adjust the color. If the color of the surrounding marble stones is relatively light, the amount of basalt powder added can be reduced or even not added.

[0047] Specifically, in order to ensure that the basalt powder is controlled within the above range to obtain a color that is coordinated and unified with the surrounding raw stones, the color value parameters of the basalt powder include: L=16.3~17.3, a=10~10.5, b=15~16.

[0048] Green volcanic stone powder is used as green rock color to adjust the color of cultural relics coloring and restoration materials. When the color of the original marble is green, the content of green volcanic stone powder can be increased, otherwise the content of green volcanic stone powder can be reduced. The content of green volcanic stone powder can be any value of 0%, 1%, 2%, 3%, 4% or 5%, or a range between any two values.

[0049] Specifically, in order to ensure that the green volcanic stone powder is controlled within the above range to obtain a color that is coordinated and unified with the surrounding raw stones, the color value parameters of the green volcanic stone powder include: L=77.3~78.3, a=-4~-5, b=12~13.

[0050] like Figure 1 and Figure 2 As shown, since the sedimentation process of rocks during diagenesis is not completely consistent, the color of marble in different locations is different, and cultural relics will also have certain color changes after being affected by long-term outdoor open-air environment (such as rain, snow, sun and other conditions). Therefore, for marbles of different colors, the present invention provides the following formula of cultural relic coloring and restoration materials.

[0051] The main colors of marble raw stone are gray and white. Then, according to the deposition method in different locations and the influence of the external environment, it presents other colors besides gray and white. For example, the color of marble raw stone can be gray of different brightness, such as dark gray, medium gray and light gray; the marble raw stone in some areas may still have some yellow tones on the basis of gray, so it is also divided into dark gray with yellow, medium gray with yellow and light gray with yellow; there are also some areas of marble raw stone almost without gray tones, but appear white, or have yellow tones on the basis of white, which can be divided into yellow or light yellow; there are also some marbles that show a little cyan on the basis of white. The following is the formula of marble of different colors and the color value parameters of the corresponding colors.

[0052] In an optional embodiment, when the cultural relics coloring and restoration material presents a dark gray, the composition of the material, by mass percentage, includes burned gravel: 10% to 15%, quartz sand: 35% to 38%, white clay: 35% to 40%, fly ash: 8% to 12% and basalt powder: 3% to 5%; when the material presents a dark gray, the color value parameters of the material include L=69 to 73, a=1 to 2, b=3 to 4.

[0053] Preferably, when the cultural relics coloring and restoration material presents a dark gray, the composition of the material, by mass percentage, includes burnt gravel: 12.5%, quartz sand: 35%, white clay: 37.5%, fly ash: 10% and basalt powder: 5%; when the material presents a dark gray, the color value parameters of the material include L=70.5~72, a=1~1.5, b=3.5~4.

[0054] In an optional embodiment, when the cultural relics coloring and restoration material presents a medium gray color, the composition of the material, calculated by mass percentage, includes burned gravel: 5% to 10%, quartz sand: 35% to 40%, white clay: 40% to 45% and fly ash: 10% to 15%; when the material presents a medium gray color, the color value parameters of the material include L=76 to 79, a=0.5 to 1.5, and b=2.5 to 4.

[0055] Preferably, when the cultural relics coloring and restoration material presents a medium gray color, the composition of the material, by mass percentage, includes burnt gravel: 5%, quartz sand: 35%, white clay: 45% and fly ash: 15%; when the material presents a medium gray color, the color value parameters of the material include L=77~78, a=0.9~1.2, b=3~4.

[0056] In an optional embodiment, when the cultural relics coloring and restoration material appears light gray, the composition of the material, by mass percentage, includes burned gravel: 5% to 10%, quartz sand: 35% to 38%, white clay: 40% to 45%, fly ash: 8% to 12% and green volcanic stone powder: 3% to 5%; when the material appears light gray, the color value parameters of the material include L = 78 to 81, a = 0.6 to 0.9, b = 2.5 to 4.

[0057] Preferably, when the cultural relics coloring and restoration material presents a light gray color, the composition of the material, by mass percentage, includes burnt gravel: 5%, quartz sand: 35%, white clay: 45%, fly ash: 10% and green volcanic stone powder: 5%; when the material presents a light gray color, the color value parameters of the material include L=79~80, a=0.6~0.8, b=3~4.

[0058] In an optional embodiment, when the cultural relics coloring and restoration material appears dark gray with a yellowish tint, the composition of the material, by mass percentage, includes burned gravel: 10% to 15%, quartz sand: 38% to 42%, white clay: 35% to 40%, fly ash: 3% to 7% and green volcanic stone powder: 3% to 5%; when the material appears dark gray with a yellowish tint, the color value parameters of the material include L = 81 to 84, a = 0.5 to 0.8, b = 3 to 4.5.

[0059] Preferably, when the cultural relics coloring and restoration material appears dark gray with a yellowish tint, the composition of the material, by mass percentage, includes burnt gravel: 12.5%, quartz sand: 40%, white clay: 37.5%, fly ash: 5% and green volcanic stone powder: 5%; when the material appears dark gray with a yellowish tint, the color value parameters of the material include L=82~83, a=0.5~0.75, b=3~4.

[0060] In an optional embodiment, when the cultural relics coloring and restoration material presents a medium gray with a yellowish color, the composition of the material, calculated by mass percentage, includes burned gravel: 10% to 15%, quartz sand: 43% to 47%, white clay: 35% to 40% and fly ash: 3% to 7%; when the material presents a medium gray with a yellowish color, the color value parameters of the material include L=82 to 84, a=1 to 2, b=5 to 6.5.

[0061] Preferably, when the cultural relics coloring and restoration material presents a medium gray with a yellowish color, the composition of the material, calculated by mass percentage, includes burnt gravel: 12.5%, quartz sand: 45%, white clay: 37.5% and fly ash: 5%; when the material presents a medium gray with a yellowish color, the color value parameters of the material include L=82.5~83.2, a=1.5~2, b=5.5~6.2.

[0062] In an optional embodiment, when the cultural relics coloring and restoration material appears light gray with a yellowish tint, the composition of the material, by mass percentage, includes burned gravel: 10% to 15%, quartz sand: 43% to 47%, white clay: 35% to 40% and green volcanic stone powder: 3% to 5%; when the material appears light gray with a yellowish tint, the color value parameters of the material include L=80 to 83, a=1 to 2, and b=5 to 6.

[0063] Preferably, when the cultural relics coloring and restoration material appears light gray with a yellowish tint, the composition of the material, by mass percentage, includes burned gravel: 12.5%, quartz sand: 45%, white clay: 37.5% and green volcanic stone powder: 5%; when the material appears light gray with a yellowish tint, the color value parameters of the material include L=81~82, a=1.2~1.7, b=5~5.6.

[0064] In an optional embodiment, when the cultural relics color restoration material appears yellowish, the composition of the material, calculated by mass percentage, includes burned gravel: 20% to 25%, quartz sand: 45% to 50% and white clay: 25% to 30%; when the material appears yellowish, the color value parameters of the material include L=80 to 82, a=3 to 4, and b=9 to 10.

[0065] Preferably, when the cultural relic coloring and restoration material appears yellowish, the composition of the material, by mass percentage, includes burnt gravel: 25%, quartz sand: 50% and white clay: 25%; when the material appears yellowish, the color value parameters of the material include L=80~81.5, a=3~3.5, b=9~9.5.

[0066] In an optional embodiment, when the cultural relics coloring and restoration material appears to be light yellow, the composition of the material, calculated by mass percentage, includes burned gravel: 10% to 15%, quartz sand: 45% to 50% and white clay: 35% to 40%; when the material appears to be light yellow, the color value parameters of the material include L=84 to 86, a=2 to 3, and b=6 to 7.

[0067] Preferably, when the cultural relic coloring and restoration material appears light yellow, the composition of the material, by mass percentage, includes burned gravel: 12.5%, quartz sand: 50% and white clay: 37.5%; when the material appears light yellow, the color value parameters of the material include L=84~85, a=2~2.5, b=6~6.7.

[0068] In an optional embodiment, when the cultural relics color restoration material appears whitish, the composition of the material, calculated by mass percentage, includes burned gravel: 5% to 10%, quartz sand: 45% to 50% and white clay: 40% to 45%; when the material appears whitish, the color value parameters of the material include L=83 to 86, a=1 to 2.5, and b=5 to 6.5.

[0069] Preferably, when the cultural relic color restoration material appears whitish, the composition of the material, by mass percentage, includes burnt gravel: 5%, quartz sand: 50% and white clay: 45%; when the material appears whitish, the color value parameters of the material include L=84~85, a=1.5~2, b=5.5~6.

[0070] In an optional embodiment, when the cultural relics coloring and restoration material appears bluish white, the composition of the material, calculated by mass percentage, includes burned gravel: 5% to 10%, quartz sand: 43% to 47%, white clay: 40% to 45% and green volcanic stone powder: 3% to 5%; when the material appears bluish white, the color value parameters of the material include L=81 to 83, a=1 to 2, b=5 to 6.

[0071] Preferably, when the cultural relics coloring and restoration material appears bluish white, the composition of the material, calculated by mass percentage, includes burned gravel: 5%, quartz sand: 45%, white clay: 45% and green volcanic stone powder: 5%; when the material appears bluish white, the color value parameters of the material include L=81.5~82.2, a=1.5~1.7, b=5~5.5.

[0072] In an optional embodiment, the particle size of the quartz sand is 80-120 meshes. By controlling the particle size of the quartz sand within the above range, the overall fineness of the material and the surrounding marble can be coordinated and unified, and the tightness of the connection between the material and the filler material and / or the marble can be ensured to prevent the material from falling off.

[0073] In a second aspect, the present invention provides an application of a material as described in any of the aforementioned embodiments in marble-like stone repair.

[0074] Preferably, the application method of the cultural relic coloring and restoration material includes mixing the raw materials of the material with water in proportion and then applying the mixture to the surface of the marble-like stone.

[0075] Preferably, the mass ratio of the total mass of the raw materials of the cultural relics coloring and restoration material to water is 1:0.35-0.4.

[0076] The cultural relic coloring and restoration material provided by the present invention has natural raw materials and does not require any chemical additives. It only uses water as a mixing medium for the various raw materials and does not require high-temperature heating for consolidation and molding. It does not cause any physical or chemical damage to the cultural relic itself, and the material has strong compatibility and reversibility.

[0077] In some preferred embodiments, when the materials provided by the present invention are applied to marble stone restoration, it is only necessary to detect the color value parameters of the area to be restored, and then mix them according to the formula corresponding to the color value parameters provided by the present invention, so that a cultural relic color restoration material with uniform color can be quickly obtained, which reduces the difficulty of color adjustment, reduces the number of repeated color tests, and reduces the requirements for the restoration experience or professional knowledge of the restoration personnel, thereby ensuring the accuracy of the color restoration of cultural relics, while avoiding the increase in costs and the possibility of damage to cultural relics caused by repeated repairs.

[0078] Example 1

[0079] The present embodiment provides a coloring and restoration material for marble cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, burned gravel: 12.5%, quartz sand: 35%, white clay: 37.5%, fly ash: 10% and basalt powder: 5%, and can be used to repair dark gray marble raw stones.

[0080] Example 2

[0081] The present embodiment provides a coloring and restoration material for marble cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, 5% burned gravel, 35% quartz sand, 45% white clay and 15% fly ash, and can be used to repair medium-grey marble raw stones.

[0082] Example 3

[0083] The present embodiment provides a coloring and restoration material for marble cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, burned granite: 5%, quartz sand: 35%, white clay: 45%, fly ash: 10% and green volcanic stone powder: 5%, and can be used to repair light gray marble raw stones.

[0084] Example 4

[0085] The present embodiment provides a coloring and restoration material for marble cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, burned gravel: 12.5%, quartz sand: 40%, white clay: 37.5%, fly ash: 5% and green volcanic stone powder: 5%, which can be used to repair dark gray and yellowish marble raw stones.

[0086] Example 5

[0087] The present embodiment provides a coloring and restoration material for marble cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, burned gravel: 12.5%, quartz sand: 45%, white clay: 37.5% and fly ash: 5%, and can be used to repair medium-gray and yellowish marble raw stones.

[0088] Example 6

[0089] The present embodiment provides a coloring and restoration material for marble cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, burned gravel: 12.5%, quartz sand: 45%, white clay: 37.5% and green volcanic stone powder: 5%, and can be used to repair light gray and yellowish marble raw stones.

[0090] Example 7

[0091] The present embodiment provides a coloring and restoration material for marble cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, 25% burned grit, 50% quartz sand and 25% white clay, and can be used to repair yellowish marble raw stones.

[0092] Example 8

[0093] The present embodiment provides a coloring and restoration material for marble cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, 12.5% ​​of burned granite, 50% of quartz sand and 37.5% of white clay, and can be used to repair marble raw stones with a light yellow color.

[0094] Example 9

[0095] The present embodiment provides a coloring and restoration material for marble cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, 5% burned grit, 50% quartz sand and 45% white clay, and can be used to repair whitish marble raw stones.

[0096] Example 10

[0097] The present embodiment provides a coloring and restoration material for marble cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, 5% burned granite, 45% quartz sand, 45% white clay and 5% green volcanic stone powder. The material can be used to repair bluish-white marble raw stones.

[0098] Test Example 1

[0099] The color-adjusting restoration material for marble cultural relics provided in the above embodiment is applied to the restoration of marble raw stones of corresponding colors, and the color value parameters of the marble raw stones of corresponding colors are detected and recorded in Table 1.

[0100] The color restoration material for the marble cultural relics of each embodiment was prepared into a cake-shaped sample block with a diameter of 2.5 cm and a thickness of 1 cm, and then the color value parameters of the sample block were detected and recorded in Table 1.

[0101] The sample block preparation method is: after mixing the raw materials of the coloring and restoration materials of marble stone cultural relics in proportion, add an equal mass of deionized water, stir thoroughly, and then prepare it into a cake-shaped sample block, and place the sample block in a cool and dry place to stand until it is fully dried.

[0102] The color value parameters are tested by a spectrophotometer, and the color value parameters of the marble raw stone and the sample obtained by the test are compared, and the total color difference △E between the two is calculated according to the color space color difference calculation formula in the National Standard of the People's Republic of China - Uniform Color Space and Color Difference Formula "GB / T 7921-1997".

[0103] According to the color difference tolerance range of CIELAB color space:

[0104] ΔE<1: Imperceptible color difference, that is, it is difficult for the naked eye to distinguish the difference between the two colors.

[0105] 1≤ΔE<2: Slight color difference, which can only be detected by careful observation.

[0106] 2≤ΔE<3.5: General color difference, which can be clearly seen by the naked eye.

[0107] ΔE ≥ 3.5: Significant color difference, very easy to detect, may have a significant impact on the appearance quality of the product.

[0108] Table 1 Color parameters of samples and marble raw stones

[0109]

[0110]

[0111] As can be seen from Table 1, the samples prepared by the color adjustment and restoration materials for marble stone cultural relics provided in Examples 1 to 10 of the present invention have a color difference of less than 1 with respect to the original marble stone, and there is no color difference when observed with the naked eye. The samples are very coordinated with the color of the cultural relics themselves, have good compatibility, and are suitable for the restoration of cultural relics.

[0112] The sample block prepared in Example 9 was placed together with the corresponding marble raw stone and photographed and observed, and the following was obtained: Figure 3 The results are shown. Figure 3 It can be seen that the sample block made by using the cultural relic coloring and restoration material provided by the embodiment of the present invention has almost no difference in color with the original marble stone, and is suitable for cultural relic restoration.

[0113] Test Example 2

[0114] The color-adjusting restoration material of marble cultural relics in Example 6 was applied to the restoration of the light grayish yellowish marble stele of the Qing Dynasty, and the following Figure 4 Results shown.

[0115] Depend on Figure 4 It can be seen that after restoration using the cultural relic coloring restoration material provided by the embodiment of the present invention, the cracks disappear, and the area near the cracks is coordinated in color with the surrounding marble original stone, with good compatibility.

[0116] Comparative Example 1

[0117] This comparative example provides a coloring and restoration material for marble cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, burned gravel: 50%, quartz sand: 40%, titanium dioxide: 8%, light gray: 1.5% and basalt powder: 0.5%, which is used to repair dark gray marble raw stones.

[0118] Comparative Example 2

[0119] This comparative example provides a coloring and restoration material for marble cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, fired granite: 50%, quartz sand: 40%, titanium dioxide: 7% and light gray: 3%, and can be used to repair medium-gray marble raw stones.

[0120] Comparative Example 3

[0121] This comparative example provides a coloring and restoration material for marble cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, burned gravel: 50%, quartz sand: 40%, titanium dioxide: 8%, light gray: 1.5% and light green: 0.5%, and can be used to repair light gray marble raw stones.

[0122] Test Example 3

[0123] The cultural relic coloring and restoration materials provided in Comparative Examples 1 to 3 were prepared into cake-shaped samples of the same size according to the method of Experimental Example 1, and their color value parameters were tested, and the results shown in Table 2 were obtained.

[0124] Then, the samples of Comparative Examples 1 to 3 and Examples 1 to 3 were placed in a natural environment with high temperature, high humidity and abundant rain in summer and low temperature, low humidity and snowfall in winter, and aged for 365 days. The color parameters of the samples after the first day were tested and recorded in Table 2. The color parameters tested on the first day (the first day is the day for testing the color after the repair material is naturally dried) and after the 365th day were compared, and the ΔE color difference values ​​of the Examples and Comparative Examples after 365 days of outdoor natural cycle aging were calculated.

[0125] Table 2 Chromaticity parameters of samples of the embodiment and comparative example before and after natural aging

[0126]

[0127] It can be seen from Table 2 that the cultural relic coloring and restoration material provided by the embodiment of the present invention has better durability, and has good color stability after long-term storage. Comparative Examples 1 to 3 use chemical synthetic pigments. Although the color difference in the initial stage is small compared with the marble original stone, after long-term storage, the color changes significantly and the color difference increases. It is not suitable to be used as a coloring and restoration material for cultural relic restoration. It is easy to repeat the restoration of the cultural relic body, which increases the time and labor cost of restoring the cultural relic body and increases the risk of damage to the cultural relic.

[0128] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A color-adjusting and restoration material for marble cultural relics, characterized in that: The materials for coloring and restoration of cultural relics are calculated by mass percentage, including burnt gravel: 5% to 25%, quartz sand: 35% to 50%, white clay: 25% to 45%, fly ash: 0% to 15%, basalt powder: 0% to 5% and green volcanic stone powder: 0% to 5%; The color value parameters of the burnt granite include: L=73.5-74, a=4-5, b=14-15; The color value parameters of the quartz sand include: L=88.5-90, a=0.1-0.2, b=2.5-3.5; The color value parameters of the white clay include: L=82-83, a=0.1-1, b=6-7; The color value parameters of the fly ash include: L=68.5-69.5, a=0.1-1, b=0.5-1.5; The color parameters of the basalt powder include: L=16.3-17.3, a=10-10.5, b=15-16; The color value parameters of the green volcanic stone powder include: L=77.3-78.3, a=-4--5, b=12-13.

2. The material according to claim 1, characterized in that When the material is dark gray, the composition of the material, by mass percentage, includes burnt gravel: 10% to 15%, quartz sand: 35% to 38%, white clay: 35% to 40%, fly ash: 8% to 12% and basalt powder: 3% to 5%; when the material is dark gray, the color value parameters of the material include L=69 to 73, a=1 to 2, and b=3 to 4; Preferably, when the material is medium gray, the composition of the material, by mass percentage, includes burnt gravel: 5% to 10%, quartz sand: 35% to 40%, white clay: 40% to 45% and fly ash: 10% to 15%; when the material is medium gray, the color value parameters of the material include L=76 to 79, a=0.5 to 1.5, and b=2.5 to 4; Preferably, when the material is light gray, the composition of the material, by mass percentage, includes burnt gravel: 5% to 10%, quartz sand: 35% to 38%, white clay: 40% to 45%, fly ash: 8% to 12% and green volcanic stone powder: 3% to 5%; when the material is light gray, the color value parameters of the material include L=78 to 81, a=0.6 to 0.9, and b=2.5 to 4.

3. The material according to claim 2, characterized in that When the material is dark gray, the composition of the material, by mass percentage, includes burnt granite: 12.5%, quartz sand: 35%, white clay: 37.5%, fly ash: 10% and basalt powder: 5%; when the material is dark gray, the color value parameters of the material include L=70.5-72, a=1-1.5, b=3.5-4; Preferably, when the material is medium gray, the composition of the material, by mass percentage, includes burnt granite: 5%, quartz sand: 35%, white clay: 45% and fly ash: 15%; when the material is medium gray, the color value parameters of the material include L=77-78, a=0.9-1.2, b=3-4; Preferably, when the material is light gray, the composition of the material, by mass percentage, includes burnt gravel: 5%, quartz sand: 35%, white clay: 45%, fly ash: 10% and green volcanic stone powder: 5%; when the material is light gray, the color value parameters of the material include L=79~80, a=0.6~0.8, b=3~4.

4. The material according to claim 1, characterized in that When the material is dark gray with a yellowish tint, the composition of the material, by mass percentage, includes burnt granite: 10% to 15%, quartz sand: 38% to 42%, white clay: 35% to 40%, fly ash: 3% to 7% and green volcanic stone powder: 3% to 5%; when the material is dark gray with a yellowish tint, the color value parameters of the material include L=81 to 84, a=0.5 to 0.8, and b=3 to 4.5; Preferably, when the material is medium gray with a yellowish tint, the composition of the material, by mass percentage, includes burnt gravel: 10% to 15%, quartz sand: 43% to 47%, white clay: 35% to 40% and fly ash: 3% to 7%; when the material is medium gray with a yellowish tint, the color value parameters of the material include L=82 to 84, a=1 to 2, and b=5 to 6.5; Preferably, when the material is light gray with a yellowish tint, the composition of the material, by mass percentage, includes burnt gravel: 10% to 15%, quartz sand: 43% to 47%, white clay: 35% to 40% and green volcanic stone powder: 3% to 5%; when the material is light gray with a yellowish tint, the color value parameters of the material include L=80 to 83, a=1 to 2, and b=5 to 6.

5. The material according to claim 4, characterized in that When the material is dark gray with a yellowish tint, the composition of the material, by mass percentage, includes burnt granite: 12.5%, quartz sand: 40%, white clay: 37.5%, fly ash: 5% and green volcanic stone powder: 5%; when the material is dark gray with a yellowish tint, the color value parameters of the material include L=82-83, a=0.5-0.75, b=3-4; Preferably, when the material is medium gray with a yellowish tint, the composition of the material, by mass percentage, includes burnt gravel: 12.5%, quartz sand: 45%, white clay: 37.5% and fly ash: 5%; when the material is medium gray with a yellowish tint, the color value parameters of the material include L=82.5-83.2, a=1.5-2, b=5.5-6.2; Preferably, when the material is light gray with a yellowish color, the composition of the material, by mass percentage, includes burnt gravel: 12.5%, quartz sand: 45%, white clay: 37.5% and green volcanic stone powder: 5%; when the material is light gray with a yellowish color, the color value parameters of the material include L=81~82, a=1.2~1.7, b=5~5.

6.

6. The material according to claim 1, characterized in that When the material is yellowish, the composition of the material, by mass percentage, includes burnt granite: 20% to 25%, quartz sand: 45% to 50% and white clay: 25% to 30%; when the material is yellowish, the color value parameters of the material include L=80 to 82, a=3 to 4, and b=9 to 10; Preferably, when the material is light yellow, the composition of the material, by mass percentage, includes burnt gravel: 10% to 15%, quartz sand: 45% to 50% and white clay: 35% to 40%; when the material is light yellow, the color value parameters of the material include L=84 to 86, a=2 to 3, and b=6 to 7; Preferably, when the material is whitish, the composition of the material, by mass percentage, includes burnt gravel: 5% to 10%, quartz sand: 45% to 50% and white clay: 40% to 45%; when the material is whitish, the color value parameters of the material include L=83 to 86, a=1 to 2.5, and b=5 to 6.

5.

7. The material according to claim 6, characterized in that When the material is yellowish, the composition of the material, by mass percentage, includes burnt granite: 25%, quartz sand: 50% and white clay: 25%; when the material is yellowish, the color value parameters of the material include L=80-81.5, a=3-3.5, b=9-9.5; Preferably, when the material is light yellow, the composition of the material, by mass percentage, includes burnt gravel: 12.5%, quartz sand: 50% and white clay: 37.5%; when the material is light yellow, the color value parameters of the material include L=84-85, a=2-2.5, b=6-6.7; Preferably, when the material is whitish, the composition of the material, by mass percentage, includes burnt gravel: 5%, quartz sand: 50% and white clay: 45%; when the material is whitish, the color value parameters of the material include L=84-85, a=1.5-2, b=5.5-6.

8. The material according to claim 1, characterized in that When the material is bluish white, the composition of the material, by mass percentage, includes burnt granite: 5% to 10%, quartz sand: 43% to 47%, white clay: 40% to 45% and green volcanic stone powder: 3% to 5%; when the material is bluish white, the color value parameters of the material include L=81 to 83, a=1 to 2, and b=5 to 6; Preferably, when the material is bluish white, the composition of the material, calculated by mass percentage, includes burnt gravel: 5%, quartz sand: 45%, white clay: 45% and green volcanic stone powder: 5%; when the material is bluish white, the color value parameters of the material include L=81.5~82.2, a=1.5~1.7, b=5~5.

5.

9. The material according to any one of claims 2 to 8, characterized in that The particle size of the quartz sand is 80-120 meshes.

10. Use of the material according to any one of claims 1 to 9 in marble stone repair; Preferably, the application method of the material comprises mixing the raw materials of the material with water in proportion and then applying the mixture to the surface of the marble-like stone; Preferably, the mass ratio of the raw material of the material to water is 1:0.35-0.4.

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