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Modified rubber concrete

A technology of rubber concrete modification, which is applied in the field of building materials, can solve the problems of large dispersion of test data, lack of compactness of concrete bond, and decline of mechanical properties of rubber concrete, so as to achieve density increase, avoid water repellency and clumping phenomenon Effect

Inactive Publication Date: 2019-03-22
中交天津港湾工程设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the mixing process, the rubber particles floated and clumped, and the bond with the concrete was not dense. In the molded sample, the rubber particles were not evenly distributed, resulting in a significant drop in the mechanical properties of rubber concrete compared with ordinary concrete, and large dispersion of test data.

Method used

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  • Modified rubber concrete

Examples

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Effect test

Embodiment 1

[0032] A method for modifying rubber particles, comprising the steps of:

[0033] 1) In parts by weight, take 7 parts of rubber granules and soak them in tap water for 7-10 days, then take them out until the soaked rubber granules sink completely without air bubbles on the surface of the granules. odor;

[0034] 2) In parts by weight, take 1 part of quick-setting agent and 4 parts of cement and mix evenly;

[0035] 3) Mix the wet rubber particles in step 1) with the powder obtained in 2), stir for 3 minutes, then add an appropriate amount of water, and stir for another 5 minutes until the slump of the mixture is 6-10;

[0036] 4) Use a spatula to spread the mixture evenly on the clean cement floor so that the particles do not clump together. Each particle should be separated. After the particles are dry, sieve to remove excess impurities. After curing in water for 3 days, take them out when needed. Come out and dry until the surface of the particles is off-white. It can the...

Embodiment 2

[0040] Modified rubber concrete: replace part of the sand with rubber particles by 5% equal volume, and the weight ratio of each raw material is: cement: water: sand: gravel: rubber particles: water reducer = 430:151.7:593.75:1160:13.76:7.74 , and the rubber particles are modified according to the method of Example 1.

[0041] Mixing process:

[0042] 1) Take stones, cement, sand, rubber particles, water reducing agent and water according to the mixing ratio (wherein the quality of the rubber particles is the quality of the rubber particles before processing;

[0043] 2) Put the stones into the mixing pot first, then mix the rubber particles into the cement and add them into the mixing pot together, then add the water reducer and sand, start the mixing pot and stir for 10 seconds, and finally add water and mix for 2min30s.

Embodiment 3

[0045] Modified rubber concrete: rubber particles are replaced by 10% equal volume of sand, and the weight ratio of each raw material is cement: water: sand: gravel: rubber particles: water reducer = 430:151.7:562.5:1160:27.5:7.74, And the rubber particles are modified according to the method of Example 1. The mixing process is with reference to Example 2.

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Abstract

The invention discloses modified rubber concrete. According to the modified rubber concrete, the weight ratio of cement to water to sand to stone to modified rubber particles is 430:151.7:(593.75-531.25):1160:(13.76-41.3), wherein a preparation method for the modified rubber particles comprises the following steps that (1) rubber particles are soaked in tap water and are taken out 7-10 days later;(2) an accelerator and the cement are uniformly mixed according to the ratio of 1:4; (3) the rubber particles wetted in the step (1) and powder obtained in the step (20 are mixed and stirred until the slump of a mixture is 6-10; and (4) mixture particles obtained in the step (3) are dried and then are maintained in water, and when needed, the mixture particles are taken out and aired until the surfaces of the particles are offwhite. Compared with the strength of standard common concrete, the reduction range of the strength of the modified rubber concrete is decreased, and compared with the strength of standard rubber concrete, the strength of the modified rubber concrete is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a modified rubber concrete. Background technique [0002] In recent years, with the rapid development of China's automobile industry and the rapid increase in the number of automobiles, the production of waste tires has increased significantly. Waste tires have strong heat resistance and mechanical resistance, and are difficult to degrade. They will not disappear naturally for decades. They are called "black pollution" and pose a great threat to the environment. Waste tires are a kind of renewable resources, recycling and reuse can not only save resources but also reduce pollution, and can also create considerable economic benefits. [0003] As a composite concrete material, rubber concrete has the advantages of good crack resistance, good toughness, good durability, light weight and good shock resistance. However, it can be seen from many studies conduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/22C04B14/06C04B14/02C04B2103/12
Inventor 舒展郑幸龄李厚民张亮
Owner 中交天津港湾工程设计院有限公司
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