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Earthen archaeological site crack repairing agent and application thereof

A technology for repairing cracks and soil ruins, applied in the field of cultural relics protection, can solve the problems that the two side walls of the soil are not firmly bonded, affect the grouting effect, and have poor aging resistance. control effect

Active Publication Date: 2016-03-30
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The soil strength, water stability, freeze-thaw resistance and wind erosion resistance of soil sites modified by PS modified grouting materials have been significantly improved, but PS itself has shortcomings such as pan-alkali, high brittleness, strong shrinkage, etc. The shrinkage is large, and the bonding with the walls on both sides of the soil is not firm enough, which seriously affects the grouting effect
BS is a synthetic polymer material. The soil color change is small, and the water resistance, frost resistance and salt resistance of the soil site treated with BS modified grouting material are improved, but the grouting material modified by BS , its shrinkage is large, the grouting effect is also poor, and the shortcomings of BS's poor aging resistance will also seriously affect the long-term durability of the restored earthen site

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a repairing agent for cracks in earth ruins, which consists of the following raw materials in parts by weight: 70% gypsum, 27% quicklime, 0.2% sodium polyphosphate, 2.5% naphthalene-based high-efficiency water reducer, hydroxypropyl Methylcellulose 0.3%.

[0030] The above-mentioned raw materials are stirred and mixed evenly to prepare the crack repairing agent for the earth ruins.

[0031] Mix the above-mentioned crack repairing agent into the repairing soil, the dosage is 40%, stir evenly with a forced mixer, the water-cement ratio is about 0.45, pour the molded test piece, and maintain it under standard conditions (temperature 20±3°C, humidity above 90%) After 28 days, perform a performance test on the sample (the test method is based on the regulations in GB / T50448-2008 and SL237-1999), the performance test results are: the fluidity of the grouting material is 400mm, the initial setting time is 50min, the final setting time is 410min, the co...

Embodiment 2

[0035] This example provides a repairing agent for cracks in earth ruins, which consists of the following raw materials in parts by weight: gypsum 70%, quicklime 13.5%, silica fume 13.5%, sodium hexametaphosphate 0.3%, naphthalene-based high-efficiency water reducer 2.3%, hydroxypropyl methylcellulose 0.4%.

[0036] The above-mentioned raw materials are stirred and mixed evenly to prepare the crack repairing agent for the earth ruins.

[0037] The above-mentioned crack repairing agent was mixed into the remediation soil of the ruins, the dosage was 40%, and the same test method as in Example 1 was adopted. The performance test results were: the fluidity of the grouting material was 385mm, the initial setting time was 65min, the final setting time was 450min, and the compressive strength was 385mm. The strength is 2.96MPa, and there is almost no disintegration after immersion in water. After 50 freeze-thaw cycles, the mass loss of the specimen is 1.9%, the strength loss is 7.4%...

Embodiment 3

[0039] The present embodiment provides a crack repairing agent for earth ruins, which consists of the following raw materials in parts by weight: 70% gypsum, 9% quicklime, 9% silica fume, 9% mineral powder, 0.1% sodium polyphosphate, naphthalene It is 2.6% superplasticizer and 0.3% hydroxypropyl methylcellulose.

[0040] The above-mentioned raw materials are stirred and mixed evenly to prepare the crack repairing agent for the earth ruins.

[0041] The above-mentioned crack repairing agent was mixed into the remediation soil of the ruins, the dosage was 40%, and the same test method as in Example 1 was adopted. The performance test results were: the fluidity of the grouting material was 415mm, the initial setting time was 40min, the final setting time was 350min, and the compression resistance The strength is 3.36MPa, and the disintegration hardly occurs after immersion in water. After 50 times of freezing and thawing, the mass loss of the specimen is 1.8%, the strength loss i...

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Abstract

The invention provides an earthen archaeological site crack repairing agent and an application thereof. The earthen archaeological site crack repairing agent consists of the following raw materials in percentage by weight: 70-79% of an inorganic gel material, 18-27% of inorganic mineral powder, 0.1-0.3% of an inhibiting agent, 2-3% of a surfactant, and 0.2-0.4% of a thickening agent, wherein the total weight percentage of the raw materials is 100%. The repairing agent is doped into a repaired soil sample, and the mixing amount of the earthen archaeological site crack repairing agent in archaeological site soil is 20-40wt% to ensure that a grouting material doped with the repairing agent has good durability, water resistance, mechanical properties and micro-expansibility, and the effect of repairing archaeological site cracks is greatly improved; and a production technology of the earthen archaeological site crack repairing agent is relatively easy to grasp, and the earthen archaeological site crack repairing agent is easily-controlled in quality, is convenient to construct, is rich in raw material source, and has good economical efficiency and performance price. The crack repairing agent has good compatibility with repaired soil, so that the service life of the repaired soil sample is greatly prolonged.

Description

technical field [0001] The invention belongs to the field of cultural relics protection, and relates to a crack repairing agent, in particular to a crack repairing agent for earth ruins and its application. Background technique [0002] Earth ruins are ancient ruins with soil as the building material. They are a type of buildings built by ancient people for living or resisting enemy aggression, such as city walls, ancient Great Wall and adobe houses. This type of ancient ruins is widely distributed in China, especially in the northwest region of China. The ancient ruins have been exposed outdoors for a long time, and have been damaged by the natural environment and human factors, and most of them have suffered serious damage. [0003] Cracks are a typical failure form of earthen ruins, and their damage to earthen ruins mainly includes three aspects: 1) the existence of cracks destroys the integrity of earthen ruins, and the earthen ruins are prone to collapse under the acti...

Claims

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Application Information

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IPC IPC(8): C04B28/14
CPCC04B28/14C04B2111/72
Inventor 吕晶杜强周天华刘晓萌吴函恒白文琦刘强
Owner CHANGAN UNIV
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