Low-dosage steel fiber modified powder concrete

A powder concrete and steel fiber technology, which is applied in the field of concrete materials, can solve the problems of low tensile performance, etc., and achieve the effects of improving the high fiber content, reducing the cost and reducing the production cost.

Active Publication Date: 2015-11-18
黄贺明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the compressive performance, flexural performance and tensile performance of this kind of ultra-fine steel fiber concrete are low, so it is not suitable for use in some projects that require high concrete strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A low-volume steel fiber modified powder concrete, comprising the following raw materials in parts by weight:

[0047] 600 parts of cement with an average particle size of 30-60 μm and a strength grade of not less than 42.5;

[0048] 150 parts of active mineral admixtures with an average particle size of 0.1-60 μm, loss on ignition ≤ 3.0%, and 28-day activity index not less than 100%;

[0049] 60 parts of inert admixtures with an average particle size of 0.1-60 μm;

[0050] Continuously graded 900 parts of sand with a particle size of 0.16~4.75mm;

[0051] 26 parts of water reducing agent with water reducing rate greater than 20%;

[0052] 135 parts of water;

[0053] 30 parts of ultra-fine steel fibers with a diameter of less than 0.13 mm and a length of 6 to 12 mm;

[0054] 7 parts of rust inhibitor.

[0055] Wherein, the inert admixture includes raw materials in the following weight percentages: limestone powder 40%, quartz stone powder 40%, nano calcium carbona...

Embodiment 2

[0061] Except that the formulations of low-volume steel fiber modified powder concrete, inert admixture, and active mineral admixture are different, other conditions are the same as in Example 1.

[0062] A low-volume steel fiber modified powder concrete, comprising the following raw materials in parts by weight:

[0063] 1,000 parts of cement with an average particle size of 30-60 μm and a strength grade of not less than 42.5;

[0064] 300 parts of active mineral admixtures with an average particle size of 0.1-60 μm, loss on ignition ≤ 3.0%, and 28-day activity index not less than 100%;

[0065] 100 parts of inert admixtures with an average particle size of 0.1-60 μm;

[0066] 1300 parts of continuously graded sand with a particle size of 0.16~4.75mm;

[0067] 35 parts of water reducing agent with water reducing rate greater than 20%;

[0068] 160 parts of water;

[0069] 100 parts of ultra-fine steel fibers with a diameter of less than 0.13 mm and a length of 6 to 12 mm;...

Embodiment 3

[0073] Except that the formulation of the low-volume steel fiber modified powder concrete is different, other conditions are the same as in Example 1.

[0074] A low-volume steel fiber modified powder concrete, comprising the following raw materials in parts by weight:

[0075] 700 parts of cement with an average particle size of 30-60 μm and a strength grade of not less than 42.5;

[0076] 200 parts of active mineral admixtures with an average particle size of 0.1-60 μm, loss on ignition ≤ 3.0%, and 28-day activity index not less than 100%;

[0077] 70 parts of inert admixtures with an average particle size of 0.1-60 μm;

[0078] Continuously graded sand with a particle size of 0.16~4.75mm: 1050 parts;

[0079] 29 parts of water reducing agent with water reducing rate greater than 20%;

[0080] 145 parts of water;

[0081] 50 parts of ultra-fine steel fibers with a diameter of less than 0.10 mm and a length of 6 to 12 mm;

[0082] 9 parts of rust inhibitor.

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Abstract

The invention discloses low-dosage steel fiber modified powder concrete which comprises the following raw materials in parts by weight: 600-1000 parts of cement, 150-300 parts of active mineral admixture, 60-100 parts of inert admixture, 900-1300 parts of sand, 26-35 parts of a water reducing agent, 135-160 parts of water, 30-100 parts of extra-fine steel fibers and 7-12 parts of a corrosion inhibitor. According to the low-dosage steel fiber modified powder concrete, provided by the technical scheme of the invention, the extra-fine steel fibers with the diameters being smaller than 0.13 mm and the lengths being 6-12 mm are adopted for replacing common steel fibers, therefore on the one hand, the mechanical property of the concrete is improved, on the other hand, the additive amount of steel fibers in the concrete is further reduced, and the production cost of the low-dosage steel fiber modified powder concrete is reduced; besides, the low-dosage steel fiber modified powder concrete is relatively low in the wholesale cost, good in the fiber distribution uniformity, high in fracture resistance and shock resistance and is suitable for popularization and application in the constructional engineering industry.

Description

field of invention [0001] The invention relates to the field of concrete materials, in particular to a low-volume steel fiber modified powder concrete using superfine steel fibers. Background technique [0002] Compared with ordinary concrete, steel fiber powder has good compressive strength, flexural strength, toughness and better seismic and impact resistance, so it is used in the field of construction engineering. The main reasons for its better mechanical properties are: in The steel fiber structure is introduced into the concrete. The principle is that through the combination of fiber and powder concrete hydration product interface, improving the hydration product mainly improves the deformation constraint force of the hydration product in the three-dimensional direction for the compressive strength, and mainly improves the interface anchoring strength and the bending deformation. The steel fiber interface produces sliding work, overcomes the brittleness of the materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/48
Inventor 刘福财肖敏王贻远李斌张信祯黄贺明
Owner 黄贺明
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