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High-damping concrete and preparation method thereof

A technology of concrete and high damping, applied in the field of building materials, can solve the problem that the compressive strength of concrete and the damping ratio cannot have both, and achieve the effect of low price, promoting the hydration process and improving the damping performance.

Active Publication Date: 2020-05-01
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In existing research, while improving the damping performance of concrete, it is often at the expense of concrete compressive strength, resulting in the incompatibility between the compressive strength and damping ratio of concrete.

Method used

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  • High-damping concrete and preparation method thereof
  • High-damping concrete and preparation method thereof

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preparation example Construction

[0034] The present invention also designs the preparation method of above-mentioned high damping concrete, comprises the following steps:

[0035] 1) Weigh each raw material component in proportion, each component and its mass weight part include: 140-150 parts of cement, 260-280 parts of natural river sand, 5-8 parts of rubber powder, 12-12 parts of micro-silica fume 15 parts, 400-420 parts of gravel, 0.58-2.16 parts of polypropylene fiber, 0.8-1 part of water reducer, 80-90 parts of water, the particle size of the gravel is below 40mm;

[0036] 2) Add the cement and polypropylene fiber in the raw material in step 1) and stir evenly until the polypropylene fiber in the mixture has no obvious agglomeration phenomenon, then add the rubber powder and microsilica powder in the raw material in step 1) and stir for 2 to 3 minutes, then Add the natural river sand and gravel in the raw materials in step 1), stir for 2-3 minutes, and finally add the water and water reducing agent in t...

Embodiment

[0039] The present invention adopts the method designed in the present invention to prepare the high-damping concrete of multiple embodiments by adopting different component distribution ratios, and the preparation steps are as follows:

[0040] 1) Weigh each component raw material in proportion, clean the mold and apply a layer of release agent;

[0041] 2) Put the weighed cement and polypropylene fiber into a forced mixer, and stir until the polypropylene fiber is evenly dispersed in the cement without obvious agglomeration;

[0042] 3) Add the weighed rubber powder and silica fume in sequence, and stir for 2-3 minutes;

[0043] 4) Add the weighed natural river sand and gravel in sequence, and stir for 2-3 minutes;

[0044] 5) Add weighed water and water reducer in sequence, and continue to stir for 3 minutes to obtain a concrete mixture;

[0045] 6) Put the obtained concrete mixture into the mold that has been coated with the release agent, place the mold on the vibrating...

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Abstract

The invention relates to high-damping concrete. The high-damping concrete comprises the following components in parts by mass: 140-150 parts of cement, 260-280 parts of natural river sand, 5-8 parts of rubber powder, 12-15 parts of silica fume, 400-420 parts of gravels, 0.58-2.16 parts of polypropylene fibers, 0.8-1 parts of a water reducing agent and 80-90 parts of water, wherein the granularityof the gravels is less than 40mm; the high-damping concrete is formed by fully mixing and curing the components. The invention further provides a technical scheme of the preparation method of the high-damping concrete. According to the invention, the polypropylene fiber with toughening and internal curing effects, the rubber powder with viscoelasticity, the silica fume with physical filling effectand the like are added, and the components cooperate with one another to improve the performance of the concrete, so that the concrete has high damping ratio.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a high-damping concrete and a preparation method thereof. Background technique [0002] With the continuous acceleration of my country's modernization process, high-rise and super high-rise buildings have sprung up. Vibrations caused by earthquakes and extreme effects can cause damage to high-rise buildings and even lead to failure. At present, dampers are often used in buildings to resist vibration, but the damping performance of concrete itself is ignored. In comparison, the development of high-damping concrete can avoid the inconvenience of damper installation and subsequent maintenance, and is more economical. [0003] Polypropylene fiber plays a significant role in inhibiting concrete plastic shrinkage and cracking, improving concrete impact toughness, and improving concrete impermeability and frost resistance. Compared with other materials, polypropy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B111/20C04B111/34
CPCC04B28/02C04B2111/00293C04B2111/20C04B2111/343C04B2201/50C04B14/06C04B14/02C04B16/0633C04B18/22C04B18/146C04B2103/302
Inventor 曾磊莫金旭马林玲郭帆刘焱华项胜程国源陈步青刘昌俊唐依伟
Owner YANGTZE UNIVERSITY
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