Ultra-high performance concrete for large-span beam construction and preparation method thereof

An ultra-high-performance, long-span technology, applied in the field of building construction, can solve the problems that it is difficult to guarantee the application effect of long-span beams, and achieve excellent mechanical properties, ensure construction safety, and low shrinkage

Pending Publication Date: 2022-01-11
山东港基建设集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the construction process of this patent application, the concrete used is not specifically limited, and it is difficult to guarantee the application effect in the construction of long-span beams

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Ultra high performance concrete prepared for large-span girder construction, the following steps:

[0031] (1) First 0.1kg N- (β- aminoethyl) aminopropyl trimethoxysilane, [gamma] 0.4kg of anhydrous ethanol was added, stirred and dispersed uniformly, followed by addition of 0.3kg of carbon black, 300W ultrasonic oscillation 30 minutes , filtered to give a modified carbon black; carbon black and the modified polyamide resin uniformly mixed with 4kg, melt spinning, a length of 55mm to obtain modified polyamide filaments;

[0032] (2) a length of 10mm and then short fibers of stainless steel surfaces by electrolytic etching, etched stainless steel to obtain short fibers, then a length of 10mm chopped carbon fiber surface loading water absorbing resin to obtain a modified chopped carbon fiber;

[0033] (3) Then the sand 28kg PO 42.5 Portland cement, 10kg of fly ash, 14kg slag powder, 65kg diameter 10mm gravel, 40kg fineness modulus of 2.5, 0.3kg modified polyamide filaments, 0....

Embodiment 2

[0039] Ultra high performance concrete prepared for large-span girder construction, the following steps:

[0040] (1) First 0.1kg N- (β- aminoethyl) aminopropyl trimethoxysilane, [gamma] 0.5kg of anhydrous ethanol was added, stirred and dispersed uniformly, followed by addition of 0.2kg of carbon black, 400W ultrasonic oscillation 20 minutes , filtered to give a modified carbon black; carbon black and the modified polyamide resin uniformly mixed with 4.5kg, melt spinning, a length of 50mm to obtain modified polyamide filaments;

[0041] (2) a length of 15mm and then short fibers of stainless steel surfaces by electrolytic etching, etched stainless steel to give short fibers having a length of 8mm and then chopped carbon fiber surface loading water absorbing resin to obtain a modified chopped carbon fiber;

[0042] (3) Then 30kg PO 42.5 portland cement, 9kg fly ash, 15kg slag powder, 60kg diameter 15mm gravel, 38kg 3.0 fineness modulus of sand, 0.2kg modified polyamide filaments, 0...

Embodiment 3

[0048] Ultra high performance concrete prepared for large-span girder construction, the following steps:

[0049] (1) First 0.1kg N- (β- aminoethyl) aminopropyl trimethoxysilane, [gamma] 0.45kg of absolute ethanol was added and stirred uniformly dispersed, followed by addition of 0.25kg of carbon black, 400W ultrasonic oscillation 25 minutes , filtered to give a modified carbon black; carbon black and the modified polyamide resin uniformly mixed with 4.2kg, melt spinning, a length of 52mm to obtain modified polyamide filaments;

[0050] (2) Then length of 12mm stainless steel short fibers surface-electrolytic etching, etched stainless steel to give short fibers having a length of 9mm and then the chopped carbon fiber surface loading water absorbing resin to obtain a modified chopped carbon fiber;

[0051] (3) Then 29kg PO 42.5 portland cement, fly ash 9.5kg, 14.5kg slag powder, 62kg diameter 12mm gravel, sand 39kg number fineness modulus of 3.0, 0.25kg modified polyamide filaments...

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Abstract

The invention discloses ultra-high performance concrete for large-span beam construction and a preparation method of the ultra-high performance concrete. Firstly, polyamide and carbon black are used as raw materials, and modified polyamide long fibers are prepared; surface electrolytic etching is conducted on the stainless steel short fibers to obtain etched stainless steel short fibers, and water-absorbent resin is loaded on the surfaces of the short carbon fibers to obtain modified short carbon fibers; and cement, fly ash, slag powder, coarse aggregate, fine aggregate, modified polyamide long fiber, etched stainless steel short fiber and modified short carbon fiber are subjected to dry mixing and uniform mixing, a water reducing agent and water are added while stirring is conducted, stirring and uniform mixing are conducted, electric field treatment is conducted, and the concrete is obtained. The concrete obtained by the invention has excellent mechanical properties and low contractility, is particularly suitable for large-span beam construction, and ensures the construction safety of the large-span beam.

Description

Technical field [0001] The present invention relates to a concrete product, and particularly relates to a method for preparing ultra high performance concrete for construction of large-span beams. Belonging to the field of construction. Background technique [0002] With the development of the construction industry, and constantly improve the level of industry, public buildings large bay room gradually increased, long-span beam in the conference room, activity room, more and more applications in the workshop. Compared with conventional girder, span Beam greater weight, higher strength of construction loads and support requirements, higher safety and stability requirements for construction, so the performance of concrete use is particularly important during the construction of large-span beams. Clearly, the strength of ordinary concrete can not meet the application needs of large-span beams. [0003] In recent years, there has been ultra-high performance concrete, which strength o...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B20/10C04B20/02C04B14/48C04B14/38
CPCC04B28/04C04B20/023C04B14/48C04B20/02C04B20/1029C04B14/386C04B2201/50C04B2201/52C04B14/022C04B16/0691C04B18/08C04B18/141C04B14/02C04B14/06C04B2103/302
Inventor 李兴满刘卓王玮孟祥君马心宇
Owner 山东港基建设集团有限公司
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