Freeze-thaw-environment-resistant fiber composite recycled concrete column and preparation method thereof

A technology for recycling concrete and concrete columns, which is applied in the field of concrete to achieve the effects of high tensile strength, low water absorption, good dimensional stability and heat resistance

Active Publication Date: 2015-05-20
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the prior art, recycled concrete columns resistant to freeze-thaw environments are rarely reported

Method used

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  • Freeze-thaw-environment-resistant fiber composite recycled concrete column and preparation method thereof
  • Freeze-thaw-environment-resistant fiber composite recycled concrete column and preparation method thereof
  • Freeze-thaw-environment-resistant fiber composite recycled concrete column and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) In order, add fine aggregate, cement, primary coarse aggregate and recycled coarse aggregate, water in turn, and stir evenly in turn;

[0036] 2) Put the result of step 1) into steel pipe or carbon pipe, and vibrate evenly to form a recycled concrete column;

[0037] 3) Wrap the steel pipe recycled concrete column or carbon tube recycled concrete column obtained in step 2) with fibers;

[0038] In parts by weight, the proportioning relationship of each substance in step 1) is: 1 part of cement, 0.53 parts of water, 1.86 parts of sand, 1.72 parts of primary coarse aggregate, and 1.72 parts of recycled coarse aggregate. The amount of fiber in step 3) is 2 kg / m 3 Concrete column; the fine aggregate is natural river sand, the recycled coarse aggregate is waste concrete, and the original coarse aggregate is natural pebbles; the fiber is CFRP.

Embodiment 2

[0040] 1) In order, add fine aggregate, cement, primary coarse aggregate and recycled coarse aggregate, water in turn, and stir evenly in turn;

[0041] 2) Put the result of step 1) into steel pipe or carbon pipe, and vibrate evenly to form a recycled concrete column;

[0042] 3) Wrap the steel pipe recycled concrete column or carbon tube recycled concrete column obtained in step 2) with fibers;

[0043] In parts by weight, the proportioning relationship of each substance in step 1) is: 1 part of cement, 0.53 parts of water, 1.86 parts of sand, 1.72 parts of primary coarse aggregate, and 1.72 parts of recycled coarse aggregate. The amount of fiber in step 3) is 4 kg / m 3 Concrete column; the fine aggregate is natural river sand, the recycled coarse aggregate is waste concrete, and the original coarse aggregate is natural pebbles; the fiber is GFRP.

Embodiment 3

[0045] 1) In order, add fine aggregate, cement, primary coarse aggregate and recycled coarse aggregate, water in turn, and stir evenly in turn;

[0046] 2) Put the result of step 1) into steel pipe or carbon pipe, and vibrate evenly to form a recycled concrete column;

[0047] 3) Wrap the steel pipe recycled concrete column or carbon tube recycled concrete column obtained in step 2) with fibers;

[0048] In parts by weight, the proportioning relationship of each substance in step 1) is: 1 part of cement, 0.53 parts of water, 1.86 parts of sand, 1.72 parts of primary coarse aggregate, and 1.72 parts of recycled coarse aggregate. The amount of fiber in step 3) is 8 kg / m 3 Concrete column; the fine aggregate is natural river sand, the recycled coarse aggregate is waste concrete, and the original coarse aggregate is natural pebbles; the fiber is BFRP.

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Abstract

The invention provides a freeze-thaw-environment-resistant fiber composite recycled concrete column which is prepared from the following raw materials in parts by weight: 1 part of cement, 0.53 part of water, 1.86 parts of sand, 1.72 parts of primary coarse aggregate, 1.72 parts of recycled coarse aggregate, and fiber 0-8 kg / m<3>. Concrete column. The recycled coarse aggregate is waste concrete, and the primary coarse aggregate is natural cobblestone. The fiber is composed of at least one of CFRP, BFRP, AFRP, GFRP and steel fiber, and is used as a building material or reinforcement material. The invention also provides a method for preparing the concrete column. The concrete column has the advantages of freeze-thaw environment resistance, beautiful appearance, environmental protection and energy saving, and is easy to prepare.

Description

technical field [0001] The invention belongs to the field of concrete, and in particular relates to a fiber composite regenerated concrete column resistant to freezing and thawing environments and a preparation method thereof. Background technique [0002] With the rapid development of my country's market economy and the continuous improvement of the level of urbanization, the amount of construction waste generated due to planning, demolition and reconstruction has increased sharply. Too much waste. According to statistics, my country produces hundreds of millions of tons of construction waste every year, which accounts for 30% to 40% of urban waste. Coupled with the frequent occurrence of natural disasters in my country in recent years, the resulting building damage has produced a large amount of construction waste. For example, the construction waste generated after the Wenchuan Earthquake reached 300 million tons. If such a large amount of construction waste is simply d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/16
CPCY02W30/91
Inventor 董江峰侯敏梁危李浪王清远
Owner SICHUAN UNIV
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