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Material and construction technology for repairing historic building wall

A technology for ancient buildings and city walls, applied in the field of materials and construction techniques for repairing ancient buildings and city walls, to achieve the effects of simple use, good resistance to salt corrosion, and easy operation

Inactive Publication Date: 2014-12-24
SHAANXI PUNING ENG STRUCTURE SPECIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few repair materials that meet the above requirements in the existing building materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A material for restoring city walls of ancient buildings, comprising the following components:

[0027] Modified material 5%; the rest is backfilled with soil.

[0028] The backfill soil is silty clay or cohesive soil with a liquid limit water content of 28%, a plasticity index of 12, and a particle size of 2 mm.

[0029] The modified material includes slurry stone, earth color 425# portland cement.

[0030] The slurry stone is selected from locally produced slurry stone powder with high purity, and the CaCO3 content in the slurry stone is 60%.

[0031] The particle size of the slurry stone is 3mm, and the mixing amount accounts for 10% of the mass of the slurry stone.

[0032] The admixture of the earth color 425# Portland cement accounts for 5% of the mass of the slurry stone.

Embodiment 2

[0034] A material for restoring city walls of ancient buildings, comprising the following components:

[0035] Modified material 10%; the balance is backfill.

[0036] The backfill soil is selected from silty clay or cohesive soil, its liquid limit water content is greater than or equal to 28%, its plasticity index is 10-13, and its particle size is 1-1.5mm.

[0037] The modified material includes slurry stone, earth color 425# portland cement.

[0038] The slurry stone is selected from locally produced slurry stone powder with high purity, and the CaCO3 content in the slurry stone is 60%-70%.

[0039] The particle size of the slurry stone is 2-2.5mm, and the mixing amount accounts for 10% of the mass of the slurry stone.

[0040] The admixture of the earth color 425# Portland cement accounts for 5% of the mass of the slurry stone.

Embodiment 3

[0042] A material and a construction process for repairing an ancient building city wall, comprising the following steps:

[0043] 1) Clean up the ground at the bottom of the foundation pit (trough) to ensure that the backfill has no debris, the particle size is less than or equal to 2mm, and the water content of the backfill is controlled to be greater than or equal to 28%; 5% of modified materials are added to the backfill;

[0044] 2) The backfill soil should be spread in layers, and the thickness of each layer should be determined according to the soil quality, compactness requirements and machine performance. The thickness of each layer of the frog-type ramming machine is 150mm. After each layer is spread, it will be raked. ;

[0045] 3) Each layer of backfill soil should be rammed at least three times, and the ramming should be one ramming and half ramming, the ramming should be connected, row by row, vertical and horizontal crossing, and the thickness of each layer of s...

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Abstract

A material for repairing a historic building wall comprises components as follows: 5%-10% of a modified material and the balance of backfilling soil. A construction technology for repairing the historic building wall comprises steps as follows: 1), clearing is performed on a bottom terrace of a foundation pit, no sundry exists on the backfilling soil, and 5%-10% of the modified material is added into the backfilling soil; 2), the backfilling soil is paved and spread in a layering manner; 3), each layer of backfilling soil is at least rammed for three times, later ramming is performed in the half position of previous ramming, later ramming and previous ramming are performed continuously row by row, and ramming is performed in a vertical and horizontal crossed manner; 4), a wall in a region is rammed and cast once, and filling and ramming are performed in the deep position first when the deep and shallow positions are connected, and filling and ramming are performed in the deep and shallow foundations when soil is backfilled to the same height with the shallow position; if filling and ramming are required to be performed sectionally, the interaction position is filled in a stepped manner; each layer of backfilled soil is required to be flat after rammed and cast; 5), after each layer of backfilling soil is rammed, sampling is performed through a cutting ring, the mass density of dry soil is measured, and soil paving is performed on an upper layer after the requirement is met; and 6), trimming and leveling. The material for repairing a historic building wall has the characteristics of high mechanical strength, long durability, wind and rain corrosion resistance and simple construction method.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a material for repairing city walls of ancient buildings and a construction process thereof. Background technique [0002] Due to years of disrepair, natural damage and man-made damage, most of the ancient architectural (earth) city wall sites in China have been severely damaged. The restoration of ancient building walls should meet the requirements of physical and mechanical strength, durability, and resistance to wind and rain erosion required for the protection of cultural relics and historic sites. However, repair materials meeting the above requirements are seldom found in the existing building materials. Contents of the invention [0003] In order to overcome the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a material and construction technology for repairing ancient building walls, which have the characteris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/36
Inventor 陈平杨瑜瑞郝宁
Owner SHAANXI PUNING ENG STRUCTURE SPECIAL TECH
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