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A super-high-strength cement-based repair material modified by a metal-organic framework material

A metal-organic framework and repair material technology, applied in the field of ultra-high-strength cement-based repair materials, can solve the problems of low early strength, poor bonding of concrete base, high cost, etc., achieve good compression resistance, improve mechanical and durability performance, and preparation process simple effect

Active Publication Date: 2019-09-24
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, polymer cement-based repair materials have good corrosion resistance, but their early strength is low; resin-based repair materials have the characteristics of high strength, strong permeability, and strong corrosion resistance, but their adhesion to the concrete base The knot is poor; glass fiber, carbon fiber and polypropylene fiber cloth can improve the crack resistance of the component and increase the bearing capacity, but the cost is high, and its repair is mainly on the outer layer, and it cannot be repaired deep into the concrete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The components are taken according to the mass fraction ratio: 42.5# ordinary Portland cement 95%, metal organic framework material (ZIF-8-Co) 2.2%, polycarboxylate superplasticizer 1%, sodium dodecyl sulfonate 1%, Dimethicone 0.8%.

[0035] The above components are mixed with water according to the water-cement ratio of 0.4, and the performance test can be carried out after stirring evenly.

[0036] According to the "Basic Performance Test Method of Building Mortar", after curing under the specified conditions, the flexural, compressive strength and bond strength tests were carried out, and the 3-day and 28-day compressive strengths were 21.6MPa and 47.6MPa, and the flexural strength was 4.6MPa. and 8.3MPa, the bonding strength is 3.9MPa and 7.3MPa.

Embodiment 2

[0038] The components are taken according to the mass fraction ratio: 42.5# ordinary Portland cement 90%, metal organic framework material (ZIF-8-Zn) 2%, carboxylic acid water reducer 1%, dodecylbenzenesulfonic acid Sodium 1%, Stearic Acid 1%.

[0039] According to the "Basic Performance Test Method of Building Mortar", the flexural and compressive strength tests were carried out after curing under specified conditions, and the 3-day and 28-day compressive strengths were 22.5MPa and 52.6MPa, and the flexural strengths were 4.6MPa and 8.3MPa. , the bonding strength is 4.4MPa and 9.2MPa.

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PUM

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Abstract

The invention discloses an ultrahigh-strength cement-based repairing material modified by a metal organic framework material. The ultrahigh-strength cement-based repairing material is prepared from the following raw materials in parts by weight: 90 to 95 parts of portland cement, 0.5 to 3 parts of zeolite imidazate framework material, 1 to 3 parts of water reducing agent, 1 to 2 parts of surfactant and 0.8 to 1.2 parts of de-foaming agent, wherein the zeolite imidazate framework material is ZIF-8(Co) or ZIF-8(Zn). The repairing material has the advantages of ultrahigh compressive strength, bending strength, bonding strength and the like.

Description

technical field [0001] The invention relates to a super-high-strength cement-based repair material modified by a metal-organic framework material. Background technique [0002] Concrete is the most widely used engineering material, but during its service period, due to the lack of compactness of the concrete itself and insufficient tensile and corrosion resistance, it is easy to cause cracks, spalling and other damage due to load, wear or corrosion, which affects the safety and security of the structure. Normal use. [0003] There are currently many repair materials for damaged concrete structures, but they are all suitable for different fields. For example, polymer cement-based repair materials have good corrosion resistance, but their early strength is low; resin-based repair materials have the characteristics of high strength, strong permeability, and strong corrosion resistance, but their adhesion to the concrete base The knot is poor; glass fiber, carbon fiber and pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B111/72
Inventor 李术才张健李召峰齐延海都君琪李恒天
Owner SHANDONG UNIV