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Modified rubber particles for mortar and preparation method of modified rubber particles

A technology for modifying rubber and rubber granules, which is applied in the direction of climate sustainability, sustainable waste treatment, and solid waste management. It is beneficial to the recycling of solid waste, improving affinity and increasing the effect of specific surface area

Active Publication Date: 2012-09-19
北京振利节能环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a modified rubber particle for mortar and its preparation method, to solve the technical problem that ordinary rubber and inorganic cementitious materials do not blend with each other, and the interface with the mortar matrix is ​​relatively weak, forming a weak area

Method used

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  • Modified rubber particles for mortar and preparation method of modified rubber particles
  • Modified rubber particles for mortar and preparation method of modified rubber particles
  • Modified rubber particles for mortar and preparation method of modified rubber particles

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Example 1, soak 40-mesh rubber particles in NaOH solution with a concentration of 5% for 4 to 6 hours, remove the hydrophobic surface layer and present a rough surface, wash and filter with water for 2 to 3 times, and then Filter and dry, and after drying, add the treated rubber particles, initiator, coupling agent, water, and water reducer in a weight ratio of 100; 0.3:2:30:3 in a water bath environment at 60°C In a water bath device, stir at 300 rpm for 30 minutes, and finally dry to obtain powdery modified rubber particles. Compared with ordinary mortar, the mortar prepared with rubber particles modified by this formula can reduce the folding ratio of mortar by 20% under the same fluidity, and the bonding strength between mortar and cement base can be increased by 15%. At the same time, the crack resistance of mortar Improved.

Embodiment 2

[0032] Example 2, soak 40-mesh rubber particles in NaOH solution with a concentration of 5% for 4 to 6 hours, remove the hydrophobic surface layer and present a rough surface, wash and filter, rinse with water for 2 to 3 times, and then Filter and dry, and after drying, add the treated rubber particles, initiator, coupling agent, water, and water reducing agent in a weight ratio of 100:0.1:2:50:5 in a water bath environment at 60°C In a water bath device, stir at 300 rpm for 30 minutes, and finally dry to obtain powdery modified rubber particles. Compared with ordinary mortar, the mortar prepared with rubber particles modified by this formula can reduce the folding ratio of mortar by 22% under the same fluidity, and the bonding strength between mortar and cement base can be increased by 16%. At the same time, the mortar has crack resistance Improved.

Embodiment 3

[0033] Example 3, soak 40-mesh rubber particles in NaOH solution with a concentration of 5% for 4-6 hours, remove the hydrophobic surface layer and present a rough surface, wash and filter, rinse with water 2-3 times, and then Filter and dry, and after drying, add the treated rubber particles, initiator, coupling agent, water, and water reducer in a weight ratio of 100:0.3:5:50:5 in a water bath environment at 60°C In a water bath device, stir at 300 rpm for 30 minutes, and finally dry to obtain powdery modified rubber particles. Compared with ordinary mortar, the mortar made of rubber particles modified by this formula can reduce the indentation ratio of mortar by 20% under the same fluidity, and the bonding strength between mortar and cement base can be increased by 18%. At the same time, the crack resistance of mortar Improved.

[0034] The coupling agent described in the above-mentioned Examples 1-3 is a vinyltriethoxysilane coupling agent. The initiator is a peroxide in...

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Abstract

Disclosed are modified rubber particles for mortar and a preparation method of the modified rubber particles. The preparation method includes soaking rubber particles in alkali liquor; removing hydrophobic surface layers of the rubber particles so that rough surfaces of the rubber particles are exposed; washing the rubber particles by clear water; adding the treated rubber particles and a coupling modifier into a water bath container to stir the treated rubber particles and the coupling modifier under a water bath environment at the temperature ranging from 40 DEG C to 70 DEG C after the rubber particles are dried; and drying the mixture in the water bath container to obtain the modified rubber particles. The modified rubber particles for mortar and the preparation method have the advantages that affinity of the rubber particles and mortar is obviously enhanced by means of modification, cracking and pull strength of the mortar are improved, the ratio of compressive strength of mortar materials is reduced, and the modified rubber particles can be used as anti-crack components in the mortar in a building project. In addition, the surfaces of the rubber particles are corroded by the aid of alkali liquor treatment, the specific surface area is increased, accordingly, bonding with a coupling agent is enhanced, a modification effect is improved, and shearing force of the modified rubber particles and the mortar is increased.

Description

technical field [0001] The invention relates to a rubber particle added in mortar and a preparation method thereof. Background technique [0002] Waste rubber is a kind of solid industrial waste. With the development of the rubber industry and the automobile industry, a large number of waste tires, rubber products and their scraps continue to increase. Because waste tires are difficult to degrade and flammable, they accumulate and occupy a large amount of land, which is easy to form safety hazards and cause serious environmental pollution. With the development of the automobile industry, the generation of waste tires is also increasing at a double-digit rate every year. In 2004, the production of waste tires in my country has exceeded 112 million, and it is expected to exceed 200 million by 2010. Waste tires have become a new source of solid pollution. These tires not only pose a huge threat to the environment, but also are a serious waste of resources. [0003] Studies h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/22
CPCY02W30/91
Inventor 李喜超
Owner 北京振利节能环保科技股份有限公司
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