A kind of high damping concrete based on internal structure design and preparation method thereof

An internal structure and concrete technology, which is applied in the manufacture of tools, building components, and earthquake resistance, can solve the problems of reduced mechanical properties, high cost, and unsatisfactory damping technology

Inactive Publication Date: 2020-07-07
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the research on improving the vibration damping performance of concrete materials mainly focuses on adding polymer emulsion high damping materials to concrete to improve the damping performance of concrete materials. However, there are problems such as high cost and different degrees of reduction in mechanical properties.
It can be seen that the current technology to improve the damping of concrete materials is still not ideal.

Method used

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  • A kind of high damping concrete based on internal structure design and preparation method thereof

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preparation example Construction

[0031] A kind of high damping concrete material preparation method based on internal structure design of the present invention comprises the following steps:

[0032] 1) Accurately weigh 15 to 17 parts of cement, 30 to 35 parts of natural river sand, and 42 to 47 parts of gravel according to the parts by mass, and after mixing evenly, add 4 to 8 parts of water and 1 to 2 parts of polycarboxylic acid Water reducing agent, after manual mixing evenly, forms ordinary concrete constraining layer;

[0033] 2) The ordinary concrete obtained in step 1) is first formed in a part of the test mold;

[0034] 3) Making polymer modified layer: including pure polymer emulsion or polymer modified mortar.

[0035] ①Pure polymer emulsion

[0036] Use 1-2 parts of polymer emulsion (styrene-acrylic emulsion or emulsified asphalt) modified layer as the free layer structure;

[0037] ② Polymer modified mortar

[0038] Mix 3-4 parts of cement, 7-9 parts of river sand, 1 part of water reducing ag...

Embodiment 1

[0044] A method for preparing a high-damping concrete material based on internal structure design in this embodiment includes:

[0045] 15 parts of cement, 30 parts of natural river sand, 45 parts of gravel, 8 parts of water, 2 parts of water reducing agent, and 1 part of emulsified asphalt.

[0046] 1) Make ordinary concrete constraining layer:

[0047] Preparation and design process: Accurately weigh the mass of each component according to the above ratio, and mix the components evenly under normal temperature conditions. The mixing time is completed within 5 minutes after adding water. It is formed in a concrete test mold and manually vibrated for 3 minutes to form a common Concrete layer, the thickness of which is about 70mm;

[0048] 2) Make the polymer modified layer: after the initial setting of the concrete, apply the weighed emulsified asphalt with a brush evenly, and the amount of emulsified asphalt should be spread evenly on the entire surface of the test piece, wi...

Embodiment 2

[0052] A method for preparing a high-damping concrete material based on internal structure design in this embodiment includes:

[0053] 15 parts of cement, 30 parts of natural river sand, 45 parts of gravel, 8 parts of water, 2 parts of water reducer, 1 part of styrene-acrylic emulsion.

[0054] 1) Make ordinary concrete constraining layer:

[0055]Preparation and design process: Accurately weigh the mass of each component according to the above ratio, and mix the components evenly under normal temperature conditions. The mixing time is completed within 5 minutes after adding water. It is formed in a concrete test mold and manually vibrated for 3 minutes to form a common Concrete layer, the thickness of which is about 70mm;

[0056] 2) Make the polymer modified layer: after the initial setting of the concrete, apply the weighed styrene-acrylic emulsion with a brush evenly, and the amount of styrene-acrylic emulsion should be evenly spread to the entire surface of the test pie...

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Abstract

The invention discloses a high-damping concrete based on internal structure design and a preparation method thereof, which includes a common concrete constrained layer and a polymer modified layer. According to the introduction of one or two polymer modified layers into the ordinary concrete constrained layer, a combination of multiple constrained layer-free layer-constrained layer vibration damping units is formed; the ordinary concrete constrained layer includes 15-17 parts of cement, natural river sand 30-35 parts, 42-47 parts of gravel, 4-8 parts of water, 1-2 parts of water reducer; the polymer modified layer includes polymer emulsion or polymer modified mortar. The high damping concrete of the present invention has better energy absorption and dissipation functions, has more excellent vibration reduction and noise absorption performance, and the mechanical properties such as flexural resistance and compressive strength are controlled within a reasonable range.

Description

technical field [0001] The invention belongs to the technical field of research and development of concrete materials, and in particular relates to a high-damping concrete based on internal structure design and a preparation method thereof. Background technique [0002] Concrete is one of the most used materials in infrastructure. As the main material of the building, it bears and transmits loads. However, its own damping is low and it cannot effectively dissipate external vibration energy. cause damage or even destruction. Therefore, improving the damping of concrete materials is of great significance in reducing the vibration energy generated by high-speed train tracks, ensuring that precision instruments can work normally without being affected by external vibrations, and that bridge structures are damaged by heavy vehicles. These problems all determine the high requirements for the vibration damping performance of concrete materials, so improving the damping performance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00E04B1/98B28B1/16C04B111/20
CPCB28B1/16C04B28/00C04B2111/2046E04B1/98C04B14/068C04B14/02C04B2103/302C04B24/26C04B24/36
Inventor 田耀刚卢东王帅飞赵成梁鹏张军李炜光石帅锋叶青张长林刘芳
Owner CHANGAN UNIV
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