Stone cultural relic reinforcing and protecting material as well as preparation method and application thereof

A technology for stone cultural relics and protective materials, applied in the field of amorphous calcium carbonate, can solve problems such as low strength, achieve high activity, high concentration, and simple process

Pending Publication Date: 2022-03-04
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, it can also quickly achieve the effect of reinforcing calcium-based stone cultural relics through the process of transforming from the metastable amorphous state to the stable crystalline state, thereby solving the problem of low early strength of existing reinforcement materials

Method used

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  • Stone cultural relic reinforcing and protecting material as well as preparation method and application thereof
  • Stone cultural relic reinforcing and protecting material as well as preparation method and application thereof
  • Stone cultural relic reinforcing and protecting material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In this embodiment, a reinforcement and protection material for stone cultural relics is composed of an alcohol solvent and nano-calcium carbonate dispersed in the alcohol solvent, and the calcium carbonate is amorphous nano-calcium carbonate; the reinforcement and protection material for stone cultural relics is used , through the spontaneous conversion of amorphous nano-calcium carbonate to crystalline calcium carbonate to strengthen and protect the cultural relic matrix.

[0043] A method for preparing a reinforcement and protection material for stone cultural relics, the steps are as follows:

[0044] Disperse calcium oxide powder in methanol solvent to obtain a calcium oxide mixture with a mass ratio of 2%; then, at a stirring speed of 500 rpm, heat to 50°C and pass CO 2 After reacting for 2 hours, mix the calcium oxide solution with CO 2 Synthesis of amorphous nano-calcium carbonate by reaction, keep stirring and CO 2 The pressure is 0.5MPa; after the reaction, ...

Embodiment 2

[0049] This embodiment is basically the same as Embodiment 1, especially in that:

[0050] In the present embodiment, the calcium oxide powder is dispersed in methanol solvent by mass ratio of 4%, and the test result is similar to that of Example 1, except that the particle diameter of the amorphous nano-calcium carbonate is 20nm, and the concentration of the colloidal solution is increased to 4%. The morphology and diffraction analysis were carried out using a transmission electron microscope (SU9000), and the results were as follows: Figure 4 As shown, the figure shows that the result is the same as in Example 1, and the bright diffraction spot in the diffraction figure shows that the obtained product is in a nano-amorphous state.

[0051] Take 2.5mL of the methanol solution of amorphous nano-calcium carbonate to infiltrate and reinforce the blank sample, and the method of reinforcement is small and multiple times. After the reinforcement is completed, the uniaxial compres...

Embodiment 3

[0053] This embodiment is basically the same as the above-mentioned embodiment, and the special features are:

[0054] In the present embodiment, calcium oxide powder is dispersed in methanol solvent by mass ratio of 8%, and the test result is similar to that of Example 1, except that the particle diameter of amorphous nano-calcium carbonate is 23nm, and the colloidal concentration is increased to 8%.

[0055] Take 5mL of the methanol solution of amorphous nano-calcium carbonate to infiltrate and strengthen the blank sample. After the reinforcement is completed, the uniaxial compressive test is carried out on the permeable sample after standing for one day in the natural environment at room temperature, and the measured compressive strength is 2.2MPa.

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Abstract

The invention discloses a stone cultural relic reinforcing and protecting material as well as a preparation method and application thereof. The stone cultural relic reinforcing and protecting material is prepared from an alcohol solvent and amorphous nano calcium carbonate dispersed in the alcohol solvent, the stone cultural relic reinforcing and protecting material is used for reinforcing and protecting a cultural relic base body through spontaneous conversion from amorphous nano calcium carbonate to crystalline calcium carbonate. According to the method disclosed by the invention, the material in a solution form or a powder form can be prepared through dispersion, reaction, separation or drying. The amorphous nano calcium carbonate material disclosed by the invention has relatively small nano particle size and relatively high activity and permeability, and can generate a relatively good reinforcing effect on stone cultural relics such as limestone in a short time through deposition of nano calcium carbonate and change of crystal morphology. The amorphous nano calcium carbonate and the calcium carbonate crystals spontaneously converted from the amorphous nano calcium carbonate have similar main components with limestone stone cultural relics, and have good compatibility with the limestone stone cultural relics.

Description

technical field [0001] The invention belongs to the field of cultural relic protection materials, and in particular relates to an amorphous calcium carbonate with high activity and high permeability, and a preparation and application method thereof. Background technique [0002] Cultural relics are the product of human civilization. They are cultural treasures that have survived thousands of years of wind and rain. They are the starting point for us to understand the past and trace history. It has rich historical, artistic and scientific research value. However, some stone cultural relics have been preserved in natural conditions for a long time, and they have been continuously exposed to wind, rain, heat and cold, which has greatly damaged their surface or internal structure, resulting in damage, cracks, shedding, crisp powder and weathering and other cultural relics diseases. At the same time, some cultural relics have been buried underground for a long time, and the inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/00C04B111/72
CPCC04B30/00C04B2201/50C04B2111/72C04B2111/00956C04B24/026C04B14/28C04B24/02
Inventor 纪士东王雯雯罗宏杰黄晓
Owner SHANGHAI UNIV
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