Reactive powder concrete containing waste steel fibers, and a preparation method thereof

A technology of active powder and steel fiber, which is applied to the field of active powder concrete containing waste steel fiber and its preparation, and achieves the effects of reducing production cost, reducing resource utilization, good economic benefits and environmental benefits

Inactive Publication Date: 2018-02-02
刘应虎 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, there is no literature report on the preparation of active powder concrete by extracting steel fibers from waste tires

Method used

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  • Reactive powder concrete containing waste steel fibers, and a preparation method thereof
  • Reactive powder concrete containing waste steel fibers, and a preparation method thereof
  • Reactive powder concrete containing waste steel fibers, and a preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Reactive powder concrete is prepared from waste tire steel fibers. The mix ratio design scheme, preparation method and strength test results are as follows:

[0029]

[0030] Prepare all the raw materials according to the mixing ratio, first stir the quartz sand and steel fiber for 1min, then add cement, silica fume, fly ash, limestone powder, mix and stir for 1min, mix the water and water reducing agent evenly, then add it to the stirring pot and stir After 5 minutes, pouring and molding was carried out according to the standard of mortar molding. After one day, the mold was removed and placed in water vapor at 80°C for 48 hours, and then naturally cured to the corresponding age to test the strength results.

Embodiment 2

[0032] Reactive powder concrete is prepared from waste tire steel fibers. The mix ratio design scheme, preparation method and strength test results are as follows:

[0033]

[0034] Prepare all the raw materials according to the mixing ratio, first stir the quartz sand and steel fiber for 1min, then add cement, silica fume, fly ash, limestone powder, mix and stir for 1min, mix the water and water reducing agent evenly, then add it to the stirring pot and stir After 5 minutes, pouring and molding was carried out according to the standard of mortar molding. After one day, the mold was removed and put into water at 80 °C for 48 hours, and then naturally cured to the corresponding age to test the strength results.

Embodiment 3

[0036] Reactive powder concrete is prepared from waste tire steel fibers. The mix ratio design scheme, preparation method and strength test results are as follows:

[0037]

[0038] Prepare all the raw materials according to the mixing ratio, first stir sea sand and steel fiber for 2 minutes, then add cement, silica fume, fly ash and mix and stir for 2 minutes, mix water and water reducer evenly, add them to the mixing pot and stir for 6 minutes, then Cast and form according to the standard of mortar molding. After one day, remove the mold and put it in water vapor at 80°C for 48 hours, and then naturally cure to the corresponding age to test the strength results.

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Abstract

The invention discloses a reactive powder concrete containing waste steel fibers, and a preparation method thereof. The reactive powder concrete comprises 1100-1300 kg/m<3> of sands, 400-850 kg/m<3> of cement, 50-200 kg/m<3> of silica fume, 50-200 kg/m<3> of fly ash, 0-200 kg/m<3> of limestone powder, 100-205 kg/m<3> of the waste steel fibers, 35-48 kg/m<3> of a water reducer and 135-155 kg/m<3> of water. The preparation method comprises the following steps: adding above raw materials into a stirrer, and stirring and mixing the raw materials to obtain a reactive powder concrete material; pouring the material into a test piece die, vibrating the test piece die, trowelling the material, performing standing curing, and releasing the molded material from the die; and performing curing after the die release to produce the reactive powder concrete containing waste steel fibers. The waste steel fibers separated in waste tires are used to replace expensive traditional copper-plated steel fibers in order to prepare the reactive powder concrete containing waste tire steel fibers, having same performances to copper-plated steel fiber reactive powder concrete, so the reactive powder concrete containing waste steel fibers and the preparation method have good economic and environmental benefits.

Description

technical field [0001] The invention belongs to a low-cost environment-friendly new building material-concrete and its preparation, and relates to an active powder concrete containing scrap steel fibers and a preparation method thereof. It is especially suitable for the preparation of low-cost reactive powder concrete using steel fibers separated from waste tires. Background technique [0002] Reactive Powder Concrete (RPC) is a new type of building material with excellent mechanical properties and durability after high-strength and high-performance concrete. However, at present, RPC production mainly still has the problems of complicated process, high cost and large shrinkage. The large amount of RPC cementitious materials and the use of a large amount of relatively expensive raw materials such as quartz sand, silica fume, and steel fibers are one of the main reasons for the high production cost of RPC. [0003] At present, the fibers used in RPC mainly include copper-coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B40/02
CPCC04B28/04C04B40/024C04B2201/52C04B14/06C04B14/28C04B14/48C04B18/08C04B18/146C04B2103/302
Inventor 刘应虎徐迅张荣华
Owner 刘应虎
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