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Protection brick and stone ancient building repair lime bonding material

A technology of bonding materials and ancient buildings, applied in the field of building materials manufacturing, can solve problems such as unsatisfactory bonding reinforcement and protection effects, incompatibility, slow hardening, etc.

Inactive Publication Date: 2015-08-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a large number of scientific research and engineering examples have proved that cement is not compatible with traditional brick / stone materials, while polymer materials have fast aging speed, poor permeability and weather resistance
Since the cementitious material used in brick / stone ancient buildings is lime, its strength and weather resistance can meet the requirements of use, so the use of lime materials has natural advantages in terms of compatibility, but traditional lime materials are compared with the above modern materials , there are still problems such as slow hardening, low strength, excessive shrinkage, poor water resistance, etc., resulting in unsatisfactory protective effect of bonding reinforcement

Method used

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  • Protection brick and stone ancient building repair lime bonding material
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  • Protection brick and stone ancient building repair lime bonding material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: the mass percent of each component of the lime binding material of repair protection brick / stone class ancient building of the present invention is:

[0018]

[0019] The active micropowder is ground slag, and the aluminum admixture is aluminum sulfate.

[0020] According to European standards, the water-cement ratio of the lime bonded mortar is 0.55, and the mortar-sand ratio is 1:3. After mixing and forming, the fluidity of the mortar is tested, and the mold is naturally cured to the specified age. After taking it out, it is demoulded to test the resistance. compressive strength. In this example, the fluidity of the mortar reaches 185mm, the initial setting time is 159min, the final setting time is 375min, the 28-day compressive strength reaches 8.73MPa, and the softening coefficient is 0.69, which meets the requirements for the repair and reinforcement of brick / stone ancient buildings.

Embodiment 2

[0021] Embodiment 2: the mass percent of each component of the lime binding material of repair protection brick / stone class ancient building of the present invention is:

[0022]

[0023] Wherein the active micropowder is metakaolin, and the aluminum additive is aluminum sulfate.

[0024] According to European standards, the water-cement ratio of the hydraulic lime mortar is 0.55, and the cement-sand ratio is 1:3. After mixing and forming, the fluidity of the mortar is tested, and the mold is naturally cured to the specified age. After taking it out, it is demolded to test the compression resistance. strength. In this example, the fluidity of the mortar reaches 180mm, the initial setting time is 175min, the final setting time is 390min, the 28-day compressive strength reaches 9.68MPa, and the softening coefficient is 0.73, which meets the requirements for the repair and reinforcement of brick / stone ancient buildings.

Embodiment 3

[0025] Embodiment 3: the mass percent of each component of the lime binding material of repair protection brick / stone class ancient building of the present invention is:

[0026]

[0027] The active micropowder is ground slag, and the aluminum additive is alunite.

[0028] According to the European standard, the water-cement ratio of the hydraulic lime mortar is 0.55, and the cement-sand ratio is 1:3. After mixing and forming, test the fluidity of the mortar, and put it into the mold and naturally maintain it to the specified age. After taking it out, it will be demoulded to test the compression resistance. strength. In this example, the fluidity of the mortar reaches 190mm, the initial setting time is 138min, the final setting time is 365min, the 28-day compressive strength reaches 10.17MPa, and the softening coefficient is 0.66, which meets the requirements for the repair and reinforcement of brick / stone ancient buildings.

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Abstract

The invention discloses a protection brick and stone ancient building repair lime bonding material, the hydraulic lime material comprises the following components by mass: 15-35% of lime, 20-50% of white cement, 10-30% of heavy calcium powder, 5-15% of active micro powder, and 0-2.2% of an aluminium additive, and the chemical composition, mineral composition and physical and mechanical properties of the hydraulic lime material are similar to that of ancient brick / stone building lime slurry in China, the hydraulic lime material solves the key problems of mismatching strength of cement mortar or polymer mortar in the prior art and ancient brick / stone, poor chemical compatibility and low longterm durability and the like, and overcomes the shortcomings of slow hardening, low strength, too large shrinkage, and the poor water resistance of the ordinary lime, and a new type inorganic cementing material is provided for protection brick and stone ancient building repair.

Description

technical field [0001] The invention relates to a lime bonding material with both water hardness and air hardness for repairing brick / stone ancient buildings, which is mainly used for the repair and reinforcement of ancient buildings and belongs to the technical field of building material manufacturing. Background technique [0002] Brick / stone ancient buildings (such as city walls, houses, tombs, grottoes, etc.) are an important part of Chinese cultural heritage, but under the action of various natural factors and human activities, weathering, loose hollowing, flaky peeling, and fractures occur Damage phenomena such as damage and loss require continuous repair and reinforcement. The search for bonding materials for the protection of brick / stone ancient buildings has always been one of the important research topics for cultural relics protection workers in various countries. [0003] At present, there are two types of repair bonding materials used in the repair of brick / sto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/10
Inventor 张云升肖建强
Owner SOUTHEAST UNIV
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