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Inorganic modifier for historical site soil

A technology of inorganic modifier and site soil, applied in the field of inorganic modifier and modifier, can solve the problems of short effective protection time, poor aging resistance, difficult to meet design requirements, etc. The effect of prolonged service life and rich source of raw materials

Active Publication Date: 2014-04-09
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the soil in Northwest China is mainly composed of sandy soil, silt soil and silty clay, and the clay content in the soil is relatively small. It is difficult to meet the design requirements for restoration of soil sites through traditional lime reinforcement soil.
Organic polymer materials are used to reinforce soil sites. Although the repair effect is good, the organic materials have poor aging resistance and the effective protection time is short.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The inorganic modifier of the ruins soil of the present embodiment is made up of the following raw materials in parts by weight: illite clay 30%, slaked lime 35%, water glass 14%, fly ash 20%, calcium lignosulfonate 1 %.

[0038] The above-mentioned raw materials are stirred and mixed evenly to prepare the inorganic modifier for the soil of the ancient ruins.

[0039] The above-mentioned inorganic modified soil was mixed into the sand in the area of ​​the Great Wall soil site in Jiayuguan, Gansu, with an amount of 10%, stirred evenly by a forced mixer, and the water-cement ratio was about 0.15, and rammed into shape, under standard conditions (temperature 20±3°C , Humidity over 90%) for 28 days, the performance test of the sample (test method according to the provisions of GB / T2542-2003 and SL237-1999), the performance test results are: flexural strength 0.52MPa, compressive strength 2.96MPa, The disintegration rate is 0.1-0.3g / min. After soaking in water for 1 hour, t...

Embodiment 2

[0043]The inorganic modifier of the ruins soil of the present embodiment is made up of the following raw materials in parts by weight: montmorillonite 40%, slaked lime 30%, water glass 6%, silica fume 22%, calcium lignosulfonate 2% .

[0044] The above-mentioned inorganic modified soil was mixed into the sandy soil in the area of ​​the Great Wall soil site in Jiayuguan, Gansu, with an amount of 10%, and the same sample preparation method and test method as in Example 1 were adopted. The performance test results were: flexural strength 0.61MPa, The compressive strength is 2.88MPa, and the disintegration rate is 0.1-0.2g / min. After soaking in water for 1 hour, the mass tends to be constant, and almost no disintegration occurs. After 20 freeze-thaw cycles, the mass loss of the specimen is 2.9%, and the strength loss is 9.1%.

Embodiment 3

[0046] The inorganic modifier of the relic soil of the present embodiment is composed of the following raw materials in parts by weight: montmorillonite 40%, slaked lime 30%, water glass 6%, fly ash 7%, silica fume 7%, weight 7% calcium carbonate, 3% calcium lignosulfonate.

[0047] The above-mentioned inorganic modified soil was mixed into the sandy soil in the area of ​​the Great Wall soil site in Jiayuguan, Gansu, with an amount of 10%, and the same sample preparation method and test method as in Example 1 were adopted. The performance test results were: flexural strength 0.58MPa, The compressive strength is 3.01MPa, and the disintegration rate is 0.1-0.2g / min. After soaking in water for 1 hour, the mass tends to be constant, and almost no disintegration occurs. After 20 freeze-thaw cycles, the mass loss of the specimen is 3.4%, and the strength loss is 8.9%.

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Abstract

The invention provides an inorganic modifier for historical site soil, which is prepared from the following raw materials in parts by weight: 30-50% of clay mineral material, 22-49% of inorganic cement, 15-30% of inorganic mineral powder and 1-3% of surfactant, totaling 100%. By doping the inorganic modifier into the restored soil sample, the restored soil has favorable water resistance; and the production technique of the modifier is easy to master and convenient for construction, and has the advantages of controllable quality, abundant raw material sources, favorable economical efficiency and high cost performance. The modifier has favorable compatibility with the restored soil, thereby greatly prolonging the service life of the restored soil sample. The rammed soil, adobe, clod, stack and other materials prepared from the restored soil modified by the modifier have favorable water permeability and air permeability, and completely satisfy the restoration idea for cultural relics.

Description

technical field [0001] The invention belongs to the field of cultural relics protection and relates to a modifying agent, in particular to an inorganic modifying agent for ancient site soil. Background technique [0002] Earth ruins are ancient ruins with historical, cultural and scientific value, which are made of soil as the main building material. They occupy a very important position in China's historical and cultural heritage and are priceless treasures left by history to China and the world. The existing earthen sites in my country stretch from the Stone Age to modern times, and are widely distributed all over the country, especially in the arid regions of Northwest China. The arid climate in Northwest China provides favorable natural environmental conditions for the remains of earthen sites. However, most of the earthen sites are immovable cultural relics, which have been in the wild for a long time, and have been damaged to varying degrees by natural weathering, envi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26C04B14/10
Inventor 吕晶周天华卢林枫杜强刘云霄刘强吴函恒
Owner CHANGAN UNIV
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