Mortar composite material for repairing historic building, and preparation method thereof

A technology for composite materials and ancient buildings, applied in the field of mortar composite materials for repairing ancient buildings and their preparation, can solve the problems of poor toughness, resistance to brittle fracture, and the inability of natural hydraulic lime to meet high strength, so as to improve adhesion and The effect of toughness, toughness improvement, and ability improvement

Pending Publication Date: 2021-06-04
CE CENT FOR ENG RES TEST & APPRAISAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a mortar composite material for ancient building repair and its preparation method, 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 Natural hydraulic lime cannot meet the problem of higher strength buildings in the restoration process of ancient buildings

Method used

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

Examples

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preparation example Construction

[0040] According to another aspect of the present invention, a kind of preparation method of mortar composite material for repairing ancient buildings according to the present invention is provided, comprising:

[0041] The inorganic cementitious material composition, the epoxy resin composition, river sand and water are mixed to prepare the mortar composite material for restoring ancient buildings.

[0042] Four variables are involved in the preparation process of the mortar composite material for restoration of medieval buildings in the present invention: the amount of epoxy resin composition, the mass fraction of fly ash in the inorganic cementitious material composition, the amount of polyvinyl alcohol fiber added, the amount of epoxy resin The amount of curing agent in the resin composition is divided into three groups according to the values ​​of the variables. In the 3 groups of schemes, the epoxy resin composition accounting for 5%, 20%, and 30% of the total mass of th...

example 1

[0053] Epoxy resin composition dosage (accounting for the ratio of inorganic cementitious material composition gross mass): 5%

[0054] Table 3 Mortar composite material ratio and experimental indicators

[0055]

[0056]

[0057] 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.

example 2

[0059] Epoxy resin composition dosage (accounting for the ratio of inorganic cementitious material gross mass): 20%

[0060] Table 4 Mortar composite ratio and experimental indicators

[0061]

[0062]

[0063] 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 ancient buildings and a preparation method of the mortar composite material. The mortar composite material is characterized in that an epoxy resin composition is added into an inorganic cementing material composition containing natural hydraulic lime, wherein the epoxy resin as an organic material for buildings has many excellent characteristics such as high adhesion and high toughness in the repair work of ancient buildings; the organic material and the inorganic material are combined, so that the brittle fracture resistance of the prepared mortar is improved by utilizing the high toughness effect of the epoxy resin; and 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 materials are complementary, the adhesion and toughness of the mortar are improved, and after the mortar is subjected to high temperature, water soaking and long-time illumination, the bonding strength of the interface is still higher than 1.5 MPa.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a mortar composite material for restoring 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 toughness, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/12C04B111/72
CPCC04B28/12C04B2111/72C04B2201/50C04B18/08C04B14/06C04B24/281C04B16/0641
Inventor 白伟亮张峰玮翟传明吕舟张荣王麒陈竹茵刘雄飞
Owner CE CENT FOR ENG RES TEST & APPRAISAL
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