Strain-strengthened steel fiber and ultra-high strength toughness corrosion-resistant UHPC material

A strain-strengthened, ultra-high-strength and toughness technology, applied in the field of strain-strengthened steel fibers and ultra-high-strength, corrosion-resistant and anti-corrosion UHPC materials, can solve the problem of reducing the compressive strength and tensile strength of UHPC, affecting the toughness and durability of UHPC. It is difficult to mix the aggregates evenly, so as to improve the cracking resistance, protect the steel fiber body, and improve the construction quality.

Pending Publication Date: 2021-12-24
江苏东南结构防灾工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the applicant found in the production practice that the steel fibers of UHPC materials will form agglomerates near the shaft of the mixer during the stirring process, that is, the steel fibers will form agglomerations or clusters during the stirring process, which will make it difficult for the steel fibers to disperse or the steel fibers will b

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Example one

[0015] This embodiment relates to a strain reinforced steel fiber, including a steel fiber body, and an insulating isolation layer is applied to the outer surface of the steel fiber body. Preferably, the insulating isolation layer is preferably a plastic layer or a resin layer. In implementation, an insulating isolation layer can be applied to the outer surface of the steel fiber body in a manner, which is prior art, and will not be described again.

[0016] Preferably, the steel fiber body is made of copper-plated steel fibers or stainless steel fibers. The copper-plated steel fiber has the characteristics of compression, tensile, anti-cracking function, stainless steel fibers have the characteristics of short process flow, low price, intensity and toughness.

[0017] In order to increase the interface bond strength of the gelling material of the steel fiber and the UHPC material, various shaped steel fiber body, for example, the cross section of the steel fi...

Example Embodiment

[0018] Example 2

[0019] The UHPC material is a high-strength, high toughness, low porosity ultra-high strength cement-based material. Its basic formulation principle is to reduce the defects (pores and microcracks) inside the material (pore and microcrack) to minimize the defects (pores and microcracks) within the material to obtain ultra-high intensity and high durability. UHPC is the best engineering material that is durable, and the UHPC mechanical properties of suitable reinforcements are close to the steel structure, and the UHPC has excellent wear resistance and explosion resistance. Therefore, UHPC is particularly suitable for large sprocket bridges, anti-proof structures, and thin-walled structures, as well as high-abrasion, high corrosion environments.

[0020] This embodiment relates to an ultra-high strength corrosion resistant UHPC material, including gelation materials, fine aggregate, super efficient water reduction and steel fiber, wherein steel fibers employ stee...

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Abstract

The invention relates to a strain-strengthened steel fiber and an ultra-high strength and toughness corrosion-resistant UHPC material, the strain-strengthened steel fiber comprises a steel fiber body, the outer surface of the steel fiber body is coated with an insulation isolation layer, and the strain-strengthened steel fiber is adopted in the ultra-high strength and toughness corrosion-resistant UHPC material. According to the invention, steel fibers can be prevented from caking or piling during stirring, so that the compressive strength and tensile strength of the UHPC material are improved, and the toughness and durability of the UHPC material are further improved.

Description

technical field [0001] The invention relates to a strain-strengthened steel fiber and an ultra-high-strength, corrosion-resistant, and anti-corrosion UHPC material, which belongs to the technical field of ultra-high performance concrete materials. Background technique [0002] Ultra-high performance concrete, referred to as UHPC (Ultra-High Performance Concrete), also known as reactive powder concrete (RPC, Reactive Powder Concrete), is the most innovative cement-based engineering material in the past 30 years. Big leap. Ultra-high performance concrete (UHPC) refers to a cement-based composite material with a compressive strength above 150MPa, ultra-high toughness, and ultra-long durability. It has broad application prospects in bridge engineering, construction engineering, and protective engineering. [0003] The main components of UHPC are cementitious materials such as silica fume and cement, fine aggregate (generally less than 0.5mm in particle size), high-efficiency wa...

Claims

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Application Information

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IPC IPC(8): C04B14/48C04B20/10C04B28/00C04B111/26
CPCC04B14/48C04B20/1029C04B28/00C04B2111/26C04B2103/302
Inventor 夏瑾
Owner 江苏东南结构防灾工程有限公司
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