Waste polypropylene fiber rubber recycled concrete and preparation method thereof

A technology of waste polypropylene and recycled concrete, which is applied in the field of building materials, can solve the problems of low utilization rate and poor performance, and achieve the effects of low cost, enhanced bending and shear performance, and improved ductility

Active Publication Date: 2015-11-18
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the disadvantages of low utilization rate and poor performance of the existing recycled concrete, the present invention adds appropriate amount of waste polypropylene fiber, rubber powder and other admixtures to the recycled concrete to improve the physical and mechanical properties of the recycled concrete and improve the economy and practicality of the recycled concrete sex

Method used

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  • Waste polypropylene fiber rubber recycled concrete and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] A waste polypropylene fiber rubber recycled concrete is made from the following raw materials in parts by weight: 3 parts of polypropylene fiber, 8 parts of rubber powder, 378 parts of recycled coarse aggregate, 882 parts of stone, 378 parts of sand, 331 parts of cement, 169 parts of water, 53 parts of admixture, wherein, the effective length of the polypropylene fiber is 5-50 mm, diameter ≥ 0.05 mm, the particle size of the rubber powder is 0.25-3 mm, and the particle size of the regenerated coarse aggregate is 5-30mm, good gradation, the additives are retarder and silica fume.

[0025] The preparation method of the above-mentioned waste polypropylene fiber rubber recycled concrete comprises the following steps: first, dry-mix the polypropylene fiber, rubber powder and sand in a mixer for 30 seconds, so that the polypropylene fiber, rubber powder and sand are fully mixed; Coarse aggregate, stones, cement, water and admixture are placed in a mixer and stirred for 4-5 mi...

Embodiment 2

[0027] A waste polypropylene fiber rubber recycled concrete is made from the following raw materials in parts by weight: 5 parts of polypropylene fiber, 10 parts of rubber powder, 378 parts of recycled coarse aggregate, 882 parts of stone, 455 parts of sand, 405 parts of cement, 160 parts of water, 60 parts of admixture, wherein, the effective length of the polypropylene fiber is 5-50 mm, diameter ≥ 0.05 mm, the particle size of the rubber powder is 0.25-3 mm, and the admixture is a water reducer, Silica fume and nano silica.

[0028] The preparation method of the above-mentioned waste polypropylene fiber rubber recycled concrete comprises the following steps: first, dry-mix the polypropylene fiber, rubber powder and sand in a mixer for 30 seconds, so that the polypropylene fiber, rubber powder and sand are fully mixed; Coarse aggregate, stones, cement, water and admixture are placed in a mixer and stirred for 4-5 minutes, fully stirred; finally the waste polypropylene fiber rub...

Embodiment 3

[0030] A waste polypropylene fiber rubber recycled concrete is made of the following raw materials in parts by weight: 7 parts of polypropylene fiber, 10 parts of rubber powder, 375 parts of recycled coarse aggregate, 875 parts of stone, 483 parts of sand, 468 parts of cement, 155 parts of water, 62 parts of admixture, wherein, the effective length of the polypropylene fiber is 5-50mm, the diameter is ≥0.05mm, and the particle size of the rubber powder is 0.25-3mm.

[0031] The preparation method of the above-mentioned waste polypropylene fiber rubber recycled concrete comprises the following steps: first, dry-mix the polypropylene fiber, rubber powder and sand in a mixer for 30 seconds, so that the polypropylene fiber, rubber powder and sand are fully mixed; Coarse aggregate, stones, cement, water and admixture are placed in a mixer and stirred for 4-5 minutes, fully stirred; finally the waste polypropylene fiber rubber recycled concrete is obtained.

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Abstract

The invention discloses waste polypropylene fiber rubber recycled concrete and a preparation method thereof. The waste polypropylene fiber rubber recycled concrete is prepared from the components in parts by weight: 1-10 parts of polypropylene fiber, 5-20 parts of a rubber powder, 0-1600 parts of a recycled coarse aggregate, 0-1600 parts of gravels, 300-500 parts of sand, 300-500 parts of cement, 150-300 parts of water, and 50-100 parts of an additive. The waste polypropylene fiber rubber recycled concrete can be applied in road construction, reduces road noise and vibration, increases the collision buffer distance between automobile tires and roads, and increases the elasticity and toughness of a concrete pavement. At the same time, the used polypropylene fiber and the used rubber powder are mostl.y polypropylene fiber clothing, discarded tires and the like, not only are the pollution of the wastes to the environment and the occupied cultivated land area reduced, but also the elasticity and toughness of the concrete can be improved, concrete pavement cracks generated due to temperature change are reduced, and thus the waste polypropylene fiber rubber recycled concrete is not only environmentally friendly but also has relatively high practical value during application.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to recycled concrete made of waste polypropylene fiber rubber and a preparation method thereof. Background technique [0002] With the rapid development of the economy, the clothing industry and the automobile industry have become the second largest industries after the construction industry. Clothes are the most frequently updated in people's daily life, and the most used raw material in modern clothing is polypropylene fiber. Discarding clothing The treatment methods are generally incineration and burial, and incineration can produce a large amount of toxic gas, causing serious harm to the environment; when it is buried, the decomposition time of polypropylene fibers is longer, and the soil will be polluted after decomposition. When added to concrete, it increases the ductility and toughness of the concrete. In the automotive industry, tires have the highest loss rate,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/16C04B18/22C04B18/20
CPCY02W30/91
Inventor 刘元珍陈绍荣许家文赵强段鹏飞
Owner TAIYUAN UNIV OF TECH
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