Rubber aggregate concrete

A rubber aggregate and concrete technology, applied in the field of concrete, can solve the problems of easily weakening the positive impact of rubber flexibility, difference in recovery rate, and difficulty in realization, and achieves the effect of promoting recycling, improving strength, and solving pollution.

Inactive Publication Date: 2016-10-26
CHONGQING CONSTR RESIDENTIAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although China's tire production and waste tire production have a large base and rapid growth, less than 50% of waste tires are recycled through formal channels, which is far behind the recovery rate of developed countries in Europe
However, improving the strength of rubber particles is not only difficult to achieve but also easily weakens the positive impact of rubber flexibility. It is very important to improve the strength of concrete and to study the homogeneity at the same time.

Method used

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  • Rubber aggregate concrete

Examples

Experimental program
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Effect test

Embodiment 1

[0013] Embodiment 1: According to 450 parts of cement, 180 parts of water, 109 parts of fly ash, 1078 parts of gravel, 417 parts of sand, 80 parts of rubber aggregate, 2.18 parts of polycarboxylate superplasticizer and organosiloxane The counterweight of 0.27 parts of the foaming agent is prepared and the ingredients are prepared. Here, the water-cement ratio (i.e. the ratio of water to cement weight) is 0.4. Before mixing, the rubber aggregate is modified with absolute ethanol. The modification steps are: (1) Soak the rubber aggregate in absolute ethanol for 23 hours and then filter, (2) Clean the surface of the soaked rubber aggregate particles with tap water, (3) Put the cleaned rubber aggregate at a temperature of 60°C Dry and set aside. Put the dried rubber aggregate and other ingredients into the mixing device, and then mix and form according to the method specified in GB / T 50080-2002 "Standards for Experimental Methods of Performance of Ordinary Concrete Mixtures".

Embodiment 2

[0014] Embodiment 2: According to 400 parts of cement, 180 parts of water, 109 parts of fly ash, 1078 parts of gravel, 417 parts of sand, 80 parts of rubber aggregate, 2.18 parts of polycarboxylate superplasticizer and organosiloxane The counterweight of 0.27 parts of the foaming agent is prepared and the ingredients are prepared. The water-cement ratio here is 0.45. Before mixing, the rubber aggregates are modified with absolute ethanol. The modification steps are: (1) put the rubber aggregates in an After soaking in water ethanol for 24 hours, filter, (2) wash the surface of the soaked rubber aggregate particles with tap water, (3) dry the cleaned rubber aggregate at a temperature of 65° C. for subsequent use. Put the dried rubber aggregate and other ingredients into the mixing device, and then mix and form according to the method specified in GB / T 50080-2002 "Standards for Experimental Methods of Performance of Ordinary Concrete Mixtures".

Embodiment 3

[0015] Embodiment 3: According to 360 parts of cement, 180 parts of water, 109 parts of fly ash, 1078 parts of gravel, 417 parts of sand, 80 parts of rubber aggregate, 2.18 parts of polycarboxylate superplasticizer and organosiloxane The counterweight of 0.27 parts of the foaming agent is prepared and the ingredients are prepared. Here, the water-cement ratio is 0.5. Before mixing, the rubber aggregates are modified with absolute ethanol. The modification steps are: (1) put the rubber aggregates in an After soaking in water ethanol for 25 hours, filter, (2) wash the surface of the soaked rubber aggregate particles with tap water, (3) dry the cleaned rubber aggregate at a temperature of 70° C. for subsequent use. Put the dried rubber aggregate and other ingredients into the mixing device, and then mix and form according to the method specified in GB / T 50080-2002 "Standards for Experimental Methods of Performance of Ordinary Concrete Mixtures".

[0016] Further, the above-mentio...

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Abstract

The invention discloses a rubber aggregate concrete which is prepared by mixing cement, water, fly ash, gravel, sand, rubber aggregate, a polycarboxylic acid high efficiency water reducing agent and an organosiloxane defoaming agent by a common concrete mixing method. The weight ratio of water to cement is 0.40-0.5. The rubber aggregate is modified by anhydrous ethanol. The modification process comprises the following steps: (1) immersing rubber aggregate in anhydrous ethanol for 23-25 hours, and filtering; (2) cleaning the immersed rubber aggregate granule surface with tap water; and (3) drying the cleaned rubber aggregate at 60-70 DEG C. The rubber aggregate concrete overcomes the defect of reduction of the concrete strength and uniformity after the rubber is added in the traditional concrete, ensures the concrete to have the strength and uniformity characteristics of the traditional concrete on the premise of ensuring favorable elastic damping, noise reduction, sound insulation, ductility and toughness of the ensure, and further promotes the recycling of the waste rubber.

Description

technical field [0001] The invention belongs to the technical field of concrete, in particular to concrete mixed with rubber. Background technique [0002] China is the world's largest rubber consumer, and it is also a country that is extremely scarce in rubber resources. According to statistics, about one billion tires are scrapped every year in the world, of which North America accounts for about 400 million, Western Europe accounts for nearly 200 million, Japan 100 million, and my country's annual production of tires has exceeded 800 million. More than 400 million entries. In 2012, China's automobile production and sales exceeded 18 million, and the rubber consumption required for the production of tires reached 10.86 million tons, accounting for 38.8% of the world. The recovery rate of waste automobile tires in the United States is 77%, that of Finland has reached 90%, and that of Japan is as high as 87%. Although China's tire production and waste tire production have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B20/10C04B18/22C04B111/20C04B111/52
CPCC04B18/22C04B20/1022C04B28/00C04B2111/2046C04B2111/52C04B22/002C04B18/08C04B14/02C04B14/06C04B24/24C04B24/42Y02W30/91
Inventor 陈怡宏杨凯张意叶建雄陈果段文川伍任雄
Owner CHONGQING CONSTR RESIDENTIAL ENG
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