Mortar composite material for repairing masonry ancient building, and preparation method thereof

A technology for composite materials and ancient buildings, which is applied in the field of mortar composite materials for repairing masonry ancient buildings and its preparation, and can solve problems such as poor toughness, weak resistance to brittle fracture, and natural hydraulic lime that cannot meet high-strength buildings. , achieve high adhesion, improve the ability to resist brittle fracture, and improve the effect of adhesion

Inactive Publication Date: 2021-06-25
BEIJING GUOWENYAN CULTURAL HERITAGE CONSERVATION CENT LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a mortar composite material for repairing masonry ancient buildings and a preparation method thereof, which is used to solve the problem that the existing natural hydraulic lime is relatively brittle and has poor toughness, and the repaired building has a weak ability to resist brittle fracture; at the same time , in the restoration process of ancient buildings, natural hydraulic lime cannot meet the problem of higher strength buildings; in addition, it also solves the problem of interfacial delamination caused by mixing organic materials and inorganic materials

Method used

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  • Mortar composite material for repairing masonry ancient building, and preparation method thereof
  • Mortar composite material for repairing masonry ancient building, and preparation method thereof
  • Mortar composite material for repairing masonry ancient building, and preparation method thereof

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preparation example Construction

[0039] According to another aspect of the present invention, a kind of preparation method of mortar composite material for masonry ancient building restoration according to the present invention is provided, comprising:

[0040] The inorganic cementitious material composition containing natural hydraulic lime is mixed with the epoxy resin composition containing modified amine curing agent to prepare the mortar composite material for masonry ancient building restoration.

[0041] Three variables are involved in the preparation process of the mortar composite material for the restoration of medieval buildings in the present invention: the amount of epoxy resin composition, the mass fraction of mineral powder, and the amount of modified amine curing agent. The implementations are divided into 3 groups. In the three groups of schemes, the epoxy resin composition accounting for 5%, 17.5%, and 30% of the total mass of the inorganic gelling material composition is used as the dosage,...

Embodiment 1

[0052] Epoxy resin composition dosage (accounting for the ratio of inorganic cementitious material composition gross mass): 5%

[0053] Table 3 Mortar composite material ratio and experimental index

[0054]

[0055]

[0056] It should be noted that the serial numbers 1), 2), and 3) in the column of the above-mentioned epoxy resin composition represent the different formulations in Table 1 of "Epoxy Resin Composition Proportions of Different Modified Amine Curing Agent Contents" The ratio of the epoxy resin composition needs to be taken according to the amount of epoxy resin monomer.

Embodiment 2

[0058] Epoxy resin composition dosage (accounting for the ratio of inorganic cementitious material gross mass): 17.5%

[0059] Table 4 Mortar composite ratio and experimental indicators

[0060]

[0061]

[0062] It should be noted that the serial numbers 1), 2), and 3) in the column of the above-mentioned epoxy resin composition represent the epoxy resin compositions of different proportions in Table 1 "the proportion of epoxy resin composition with different curing agent content" For the resin composition, the value should be taken according to the amount of epoxy resin monomer.

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Abstract

The invention relates to the technical field of building materials, in particular to a mortar composite material for repairing masonry ancient buildings, and a preparation method of the mortar composite material. According to the invention, an epoxy resin is combined with natural hydraulic lime, wherein the brittle fracture resistance of the prepared mortar is improved by utilizing the high-toughness effect of the epoxy resin, the characteristic of poor durability of the epoxy resin is made up by high durability of the natural hydraulic lime, and the problem of insufficient adhesion of the natural hydraulic lime is made up by high adhesion of the epoxy resin, so that the advantages of the two parties are complementary, the adhesion and toughness of the mortar are improved, after the mortar is subjected to high temperature, water soaking and long-time illumination, the bonding strength of an interface is still higher than 1.5 MPa; and by adding a modified amine curing agent, an organic material (epoxy resin) and an inorganic material (natural hydraulic lime) are better compatible to solve the problem of interface layering, so that the overall performance of the mortar composite material is improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a mortar composite material for repairing masonry ancient buildings and a preparation method thereof. Background technique [0002] In the construction process of ancient buildings in our country, mortar is usually used as the raw material for cementation, and there are many kinds of mortar, which is said to be "nine mortars and eighteen grays". But nowadays, the use of mortar has been gradually replaced by natural hydraulic lime due to the unclear mixing ratio of mortar and the time-consuming and labor-intensive traditional process. Natural hydraulic lime is fired from limestone with high clay content or high silica content. It has moderate flexural and compressive strength, water resistance and self-healing properties. It is used in the restoration of ancient buildings. played a vital role. The original natural hydraulic lime is relatively brittle and has poor toug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/12C04B111/72
CPCC04B28/12C04B2111/72
Inventor 吕舟王聪飞张荣白伟亮王麒陈竹茵谢齐杨龙江刘雄飞
Owner BEIJING GUOWENYAN CULTURAL HERITAGE CONSERVATION CENT LTD
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