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Grouting material for energy-consuming node of prefabricated part

A technology of prefabricated components and grouting materials, applied in the field of building materials, can solve the problems of labor-consuming and time-consuming binding of steel bars, large shrinkage, poor toughness and ductility, and low cost performance

Inactive Publication Date: 2017-07-07
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mainly because the outer protective material is a brittle concrete material, which is prone to brittle failure after being stressed
In addition, according to the design of the seismic structure, the reinforcement ratio here is very high, the spacing between the steel bars is small, and the binding of the steel bars is time-consuming; self-compacting concrete is generally used for grouting. Although self-compacting concrete has high fluidity, it is still a brittle material, with large shrinkage, Poor toughness and ductility
Therefore, the brittle concrete materials with high reinforcement ratio and no seismic safety used in the existing seismic joints have very low cost performance

Method used

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  • Grouting material for energy-consuming node of prefabricated part
  • Grouting material for energy-consuming node of prefabricated part
  • Grouting material for energy-consuming node of prefabricated part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1 material composition ratio such as table 1:

[0037] Table 1 Mixing ratio of new grouting materials for energy-dissipating nodes of prefabricated components (mass fraction)

[0038]

[0039] The raw material used in embodiment 1 is:

[0040] The gelling material is mainly composed of CaO and SiO 2 、Al 2 o 3 powder; fine aggregate, fine aggregate A is ordinary river sand with a particle size of 0.15 mm to 1.18 mm and a fineness modulus of 1.65; fine aggregate B is mainly composed of CaCO 3 Granules; plastic regulators are polycarboxylate superplasticizers and cellulose ethers; water is tap water; fibers are synthetic fibers and are polyvinyl alcohol fibers.

[0041] Example 1 Prepare the new type of grouting material for energy-dissipating nodes of the above-mentioned prefabricated components, the steps are:

[0042] (1) Accurately weigh all powder materials such as gelling materials and fine aggregates, and mix at low speed for 2 minutes;

[0043] ...

Embodiment 2

[0048] Embodiment 2 material composition ratio such as table 2:

[0049] Table 2 Mixing ratio of new grouting materials for energy-dissipating nodes of prefabricated components (mass fraction)

[0050]

[0051] The raw materials used in embodiment 2 are:

[0052] The gelling material is mainly composed of CaO and SiO 2 、Al 2 o 3 powder; fine aggregate, fine aggregate A is ordinary river sand with a particle size of 0.15 mm to 1.18 mm and a fineness modulus of 1.65; fine aggregate B is mainly composed of CaCO 3 Granules; plastic regulators are polycarboxylate superplasticizers and cellulose ethers; water is tap water; synthetic fibers are polyvinyl alcohol fibers.

[0053] Example 2 Prepare the new type of grouting material for energy-dissipating nodes of the above-mentioned prefabricated components, the steps are:

[0054] (1) Accurately weigh all powder materials such as gelling materials and fine aggregates, and mix at low speed for 2 minutes;

[0055] (2) Add water...

Embodiment 3

[0060] Embodiment 3 material composition ratio such as table 3:

[0061] Table 3 Mixing ratio of new grouting materials for energy-dissipating nodes of prefabricated components (mass fraction)

[0062]

[0063] The raw materials used in embodiment 3 are:

[0064] The gelling material is mainly composed of CaO and SiO 2 、Al 2 o 3 powder; fine aggregate, fine aggregate A is ordinary river sand with a particle size of 0.15 mm to 1.18 mm and a fineness modulus of 1.65; fine aggregate B is mainly composed of CaCO 3 Granules; plastic regulators are polycarboxylate superplasticizers and cellulose ethers; water is tap water; synthetic fibers are polyvinyl alcohol fibers.

[0065] Example 3 Prepare the new type of grouting material for the energy-dissipating nodes of the above-mentioned prefabricated components, and the steps are as follows:

[0066] (1) Accurately weigh all powder materials such as gelling materials and fine aggregates, and mix at low speed for 2 minutes;

[...

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Abstract

The invention discloses a grouting material for an energy-consuming node of a prefabricated part. The material has the expansion degree of 180-300mm, the compressive strength of 30-80MPa, the breaking strength of 12-17MPa, the flexural toughness of 9-24KN.mm and the ductility of 0.5-0.7%. The grouting material is composed of the following components in parts by weight: 100 parts of a cementing material A, 67-400 parts of a cementing material B, 50-150 parts of a fine aggregate A, 0-36 parts of a fine aggregate B, 33-150 parts of water, 0.4-1.9 parts of a plasticity regulator and 3.3-10.4 parts of synthetic fibers. The material disclosed by the invention makes up the defect that an existing grouting material is a fragile material; the material has good ductility, thereby having a good energy-consuming effect; and meanwhile, the material is stable in all the performances and excellent in concrete interface bonding property, and interface shear strength is not lower than 8MPa.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a novel grouting material for energy-dissipating nodes of prefabricated components, which is used for energy-dissipating parts such as beams, column ends or seismic nodes. Background technique [0002] Earthquake is a sudden and extremely harmful natural disaster. Sudden major earthquakes will cause destruction and collapse of houses, interruption of lifelines such as transportation and communication, water supply and power supply, etc. in an instant. A large number of earthquake damage experience shows that the casualties and economic losses in earthquakes are mainly caused by the collapse of buildings and the damage of engineering facilities and equipment. Therefore, in architectural design, special emphasis is placed on seismic performance. However, current research mainly focuses on structural design, such as optimizing the seismic performance of structures by us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B111/20C04B111/70
CPCC04B28/06C04B2111/2046C04B2111/70C04B2201/50C04B7/02C04B18/08C04B18/141C04B18/146C04B18/142C04B14/06C04B14/28C04B16/0641C04B24/383C04B2103/302
Inventor 郭丽萍杨亚男丁聪谌正凯
Owner SOUTHEAST UNIV
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