Modified rubber particles as well as preparation method and application thereof

A technology for modifying rubber and rubber particles, which is applied in the directions of climate sustainability, sustainable waste treatment, solid waste management, etc. phenomenon and other problems to achieve the effect of reducing the overall probability of failure, improving the surface quality and enhancing the bonding strength

Inactive Publication Date: 2021-02-09
XIAN HIGHWAY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For rubber cement-based materials, since the density of rubber particles is small, only about 2 / 5 of other aggregates and cementitious materials, rubber particles are prone to floating in the plastic state, resulting in rubber in the cement. Uneven distribution in the base material increases the overall failure probability of rubber aggregate concrete, reduces the material strength, and restricts the development and application of rubber cement-based materials

Method used

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  • Modified rubber particles as well as preparation method and application thereof
  • Modified rubber particles as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation method of the present embodiment comprises the following steps:

[0034] Step 1: Submerge 40 parts of rubber particles in NaCO with a mass concentration of 10% in parts by mass 3 Soak in the solution for 1h, then filter to obtain the filter residue;

[0035] Step 2, placing the filter residue obtained in step 1 in flowing clear water for 20 seconds;

[0036] Step 3. Submerge the washed filter residue in step 2 in clean water, then add 1 part of KH-560 in parts by mass and stir evenly. After standing still, filter and dry to obtain modified rubber particles.

Embodiment 2

[0039] The application of this embodiment includes the following steps:

[0040] Step 1. Weigh and prepare raw materials according to the composition of the target product weakly floating rubber concrete. The raw materials for preparing the weakly floating rubber concrete in parts by mass are: cement: water: sand: crushed stone: water reducing agent: modified rubber particles =478:165:650:954:7.1:63, wherein the modified rubber particles are prepared from Example 1, and the modified rubber particles replace 20% of the sand by volume fraction to prepare weakly floating rubber concrete;

[0041] Step 2. Start the mixer, put the gravel, sand and modified rubber particles prepared in step 1 into the mixer in turn and stir for 30 seconds to make the raw materials mix evenly, then put in cement and stir for 10 seconds;

[0042] Step 3: Dissolve the water reducer in water and stir evenly to form a water reducer solution, then add it into the mixer after putting in the cement for mixi...

Embodiment 3

[0044] The application of this embodiment includes the following steps:

[0045] Step 1. Weigh and prepare raw materials according to the composition of the target product weakly floating rubber concrete. The raw materials for preparing the weakly floating rubber concrete in parts by mass are: cement: water: sand: crushed stone: water reducing agent: modified rubber particles =478:165:488:954:7.1:126, wherein the modified rubber particles are prepared from Example 1, and the modified rubber particles replace 40% sand by volume fraction to prepare weakly floating rubber concrete;

[0046] Step 2. Start the mixer, put the gravel, sand and modified rubber particles prepared in step 1 into the mixer in turn and stir for 30 seconds to make the raw materials mix evenly, then put in cement and stir for 10 seconds;

[0047] Step 3: Dissolve the water reducer in water and stir evenly to form a water reducer solution, then add it into the mixer after putting in the cement for mixing in ...

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Abstract

The invention discloses a preparation method of modified rubber particles. The method comprises the following steps: 1, soaking rubber particles in a NaCO3 solution, and filtering to obtain filter residues; 2, washing filter residues; 3, soaking the filter residues in clear water, adding KH560, uniformly stirring the mixture, standing the mixture, and filtering and drying the mixture to obtain modified rubber particles. The invention further discloses the modified rubber particles and further discloses application of the modified rubber particles to preparation of weak floating rubber concrete. According to the preparation method, the rubber particles are sequentially soaked in the alkaline solution and treated with the coupling agent KH-560, so that chemical impurities hindering bonding of the rubber particles are reduced, a uniform and tightly combined silane coupling agent layer is formed on the surfaces of the rubber particles, and the bonding performance of the modified rubber particles is improved; in addition, the modified rubber particles are applied to preparation of the weak floating rubber concrete, so that the strength of the weak floating rubber concrete is improved, and the distribution uniformity of the modified rubber particles in a cement-based material is improved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a modified rubber particle and its preparation method and application. Background technique [0002] With the continuous development of China's automobile industry and economic level, the production of waste tires is also increasing year by year. How to deal with the increasing waste rubber tires has become a common concern of the world. Waste rubber is a thermosetting polymer material, which is difficult to degrade under natural conditions. If it is discarded on the surface or buried underground for decades, it will not rot and deteriorate. Incineration will cause serious air pollution and pose a great threat to the environment. , so recycling and reusing waste rubber is a better way to deal with it, which can not only reduce environmental pollution, but also save resources. At present, countries all over the world are actively researching the recycling o...

Claims

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Application Information

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IPC IPC(8): C04B20/02C04B18/22C04B28/04
CPCC04B18/22C04B20/02C04B20/023C04B28/04C04B2201/50C04B14/02C04B14/06C04B2103/302Y02W30/91
Inventor 丁楚志陈旭刘焱烁康俊涛丁润宇王旭贺子豪
Owner XIAN HIGHWAY INST
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