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Method for reinforcing carbonate rock stone historical relics

A technology of stone cultural relics and carbonate rocks, which is applied in the field of reinforcement of loose calcium carbonate rocks, can solve problems such as different capillary forces, and achieve the effects of good compatibility, improved stain resistance, and improved stain resistance

Inactive Publication Date: 2014-11-26
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the drying process of stone pores, due to the gas-liquid bending surface in the gel, the capillary force is different, resulting in cracking and cracking of the gel, so that it cannot effectively strengthen the stone, especially the deteriorated stone.

Method used

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  • Method for reinforcing carbonate rock stone historical relics
  • Method for reinforcing carbonate rock stone historical relics
  • Method for reinforcing carbonate rock stone historical relics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Clean the rock surface with deionized water;

[0021] (2) Adjust the pH to 3.8 with tartaric acid and ammonia water, and the concentration of tartaric acid is 0.15mol L -1 Ammonium tartrate solution to treat the rock surface to form a calcium tartrate transition layer on the rock surface, thereby bringing functional hydroxyl groups on the rock surface;

[0022] (3) Then the surface of the stone is treated with modified tetraethyl silicate sol, and a reinforced protective layer with silica as the main component is formed in the pores of the loose rock, and these protective layers are connected with calcium carbonate through hydroxyl groups;

[0023] (4) Aging at room temperature for 30 days.

[0024] Preparation of the modified tetraethyl orthosilicate sol described in step (3): at room temperature, first mix ethyl orthosilicate and ethanol, stir for 10 minutes, add deionized water, and then ultrasonicate for 10 minutes under stirring conditions, and then Add polyd...

Embodiment 2

[0030] (1) Clean the rock surface with deionized water.

[0031] (2) Adjust the pH to 4.0 with tartaric acid and ammonia water, and the concentration of tartaric acid is 0.17mol L -1 The ammonium tartrate solution is used to treat the rock surface to form a calcium tartrate conversion layer on the rock surface, so that the rock surface can be equipped with functional hydroxyl groups.

[0032] (3) Then the surface of the stone is treated with modified tetraethyl silicate sol, and a reinforced protective layer with silica as the main component is formed in the pores of the loose rock, and these protective layers are connected with calcium carbonate through hydroxyl groups.

[0033] (4) Aging at room temperature for 30 days.

[0034] Preparation of the modified tetraethyl orthosilicate sol described in step (3): first, mix ethyl orthosilicate and isopropanol, stir for 10 minutes, add deionized water, and then ultrasonicate for 10 minutes while stirring, then vigorously Add hydr...

Embodiment 3

[0037] (1) Clean the rock surface with deionized water.

[0038] (2) Adjust the pH to 4.0 with tartaric acid and ammonia water, and the concentration of tartaric acid is 0.17mol L -1 The ammonium tartrate solution is used to treat the rock surface to form a calcium tartrate conversion layer on the rock surface, so that the rock surface can be equipped with functional hydroxyl groups.

[0039](3) Then the surface of the stone is treated with modified tetraethyl silicate sol, and a reinforced protective layer with silica as the main component is formed in the pores of the loose rock, and these protective layers are connected with calcium carbonate through hydroxyl groups.

[0040] (4) Aging at room temperature for 30 days.

[0041] Preparation of the modified tetraethyl orthosilicate sol described in step (3): first, mix ethyl orthosilicate and acetone, stir for 10 minutes, add deionized water, and then ultrasonicate for 10 minutes while stirring, and then vigorously stir Add ...

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Abstract

The invention relates to a method for reinforcing carbonate rock stone historical relics, which comprises the following steps: 1)cleaning the rock surface by deionized water; 2)adjusting an ammonium tartrate solution with pH value of 3.8-4.4 and tartrate concentration of 0.15-0.20mol.L<-1> by tartrate and ammoniacal liquor, processing the rock surface; 3)then treating stone surface by modified ethyl orthosilicate sol; and 4)aging for more than 7 days under normal temperature. The method has the advantages that silica is generated by hydrolyzing ethyl orthosilicate, silica and the stone have good compatibility, appearance, color and handle of the protected stone historical relics are not changed; and hydrophobicity, compressive strength, acid resistance and soiling resistance of the stone can be improved and increased.

Description

technical field [0001] The invention relates to a reinforcement method for loose calcium carbonate rock, which is mainly used for surface layer reinforcement of inferior calcium carbonate stone cultural relics. Background technique [0002] my country has a large number of precious cultural relics and historical relics, among which open-air stone relics occupy an important position, such as the Stone Carvings of the Six Dynasties, Leshan Giant Buddha, Yungang Grottoes, Dunhuang Grottoes, Longmen Grottoes, Nanxiangtang Grottoes, Dazu Rock Carvings, etc. These cultural relics are important historical resources and tourism resources. The open-air stone cultural relics are mainly divided into silicates and carbonates according to the rock composition. Silicate rocks include granite, glutenite, etc. Granite is hard, durable, and highly stable, such as Yungang Grottoes, most of which are carved on feldspar quartz sandstone, and its main component is SiO 2 , followed by Al 2 o ...

Claims

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Application Information

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IPC IPC(8): C04B41/50
Inventor 徐飞高李丹
Owner NANCHANG UNIV
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