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A kind of ultra-fine powder-based ultra-high toughness lightweight concrete and preparation method thereof

A technology of lightweight concrete and ultra-high toughness, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of self-heavy, inability to effectively balance light weight and high strength performance, and achieve increased density , Excellent water penetration resistance, and the effect of broadening the application range

Active Publication Date: 2022-07-08
中建西部建设新疆有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, ultra-high toughness concrete is developing rapidly abroad. It is used in special structures such as long-span bridges and anti-violence. Most of it is in the research stage in China, and its application is seldom. However, its dead weight is still very large, at 2500kg / m 3 Above, in contrast to lightweight concrete, the self-weight can achieve 1400-1950kg / m 3 , but its strength is generally only about 30MPa
Such as: Liu Zengchen et al. researched and disclosed a high-strength lightweight aggregate concrete with a maximum strength of 71.3MPa and a bulk density of 1850kg / m 3 Huang Dongjie et al. researched and disclosed a kind of lightweight high-strength concrete, which mainly uses light aggregate soaked in sodium sulfate solution to prepare a strength of 63MPa lightweight aggregate concrete; all of which cannot effectively take into account light weight and high-strength performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of ultra-fine powder-based ultra-high toughness lightweight concrete, its preparation method comprises the following steps:

[0039] 1) Weigh each raw material in proportion, and each raw material and its parts by weight are: 600 parts of sulfoaluminate cement, 100 parts of ultrafine powder, 50 parts of silica fume, 75 parts of glass microspheres, and 90 parts of expanded perlite , 5 parts of copper-plated microwire steel fibers, 25 parts of high water-reducing and viscosity-reducing polycarboxylate water-reducing agent, and 250 parts of water;

[0040] 2) Using the HJW-60 type mandatory mixer, first add glass microspheres and expanded perlite to it and stir for 20s, add 1 / 3 of the amount of water and stir for 60s, then put in sulfoaluminate cement, superfine powder and silica fume to continue. Stir for 20 s, then add the remaining water and polycarboxylate water reducer to stir for 600 s, and finally add copper-coated micro-wire steel fiber to stir for 60 s to o...

Embodiment 2

[0045] A kind of ultra-fine powder-based ultra-high toughness lightweight concrete, its preparation method comprises the following steps:

[0046] 1) Weigh each raw material in proportion, and each raw material and its parts by weight are: 650 parts of sulfoaluminate cement, 150 parts of ultrafine powder, 70 parts of silica fume, 100 parts of glass microspheres, and 110 parts of expanded perlite , 10 parts of copper-plated microwire steel fibers, 35 parts of high water-reducing and viscosity-reducing polycarboxylate water-reducing agent, and 220 parts of water;

[0047] 2) In the HJW-60 mandatory mixer, first add glass microspheres and expanded perlite and stir for 30s, add 1 / 2 of the amount of water and stir for 70s, then add sulfoaluminate cement, ultrafine powder and silica fume to continue stirring After 30s, the remaining water and polycarboxylate superplasticizer were added to stir for 500s, and finally copper-plated microwire steel fibers were added to stir for 80s to o...

Embodiment 3

[0052] A kind of ultra-fine powder-based ultra-high toughness lightweight concrete, its preparation method comprises the following steps:

[0053] 1) Weigh each raw material in proportion, and each raw material and its parts by weight are: 675 parts of sulfoaluminate cement, 125 parts of ultrafine powder, 60 parts of silica fume, 87 parts of glass microspheres, and 100 parts of expanded perlite , 7 parts of copper-plated microwire steel fibers, 30 parts of high water-reducing and viscosity-reducing polycarboxylate water-reducing agent, and 235 parts of water;

[0054] 2) In the HJW-60 type mandatory mixer, first add glass microspheres and expanded perlite and mix for 25s, add 5 / 12 amount of water and mix for 65s, then add sulfoaluminate cement, ultrafine powder and silica fume to continue mixing After 25s, the remaining water and polycarboxylate superplasticizer were added to stir for 510s, and finally copper-plated microwire steel fibers were added to stir for 70s to obtain u...

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Abstract

The invention discloses an ultra-high toughness lightweight concrete based on ultra-fine powder. Each component and its weight parts include: 600-750 parts of sulfoaluminate cement, 100-150 parts of ultra-fine powder, silica fume 50-70 parts, 75-100 parts of glass microspheres, 90-110 parts of expanded perlite, 5-10 parts of copper-coated microwire steel fibers, 25-35 parts of high water-reducing and viscosity-reducing polycarboxylate water-reducing agent, water 220-250 parts; the superfine powder is mixed with calcium carbide slag powder, fly ash and mineral powder as the main raw materials. The ultra-high-toughness lightweight concrete obtained by the invention can effectively take into account light weight, high strength and ultra-high toughness, and can ensure high strength and high toughness while reducing self-weight, and is suitable for fields such as ultra-high-rise structures; and the preparation method involved is relatively simple and expensive. Low, suitable for promotion and application.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to ultra-fine powder-based ultra-high toughness lightweight concrete and a preparation method thereof. Background technique [0002] Concrete material is the most common man-made building material. Its inherent shortcomings are its self-weight and brittleness. Improving the brittleness of concrete and realizing the lightweight and high-strengthening of concrete is to improve the use efficiency of concrete materials, reduce the self-weight of the structure, and save building material resources and energy. It is also one of the most effective technical approaches for concrete materials science and the main goal of the basic theoretical research and application technology development of concrete materials. [0003] At present, ultra-high toughness concrete is developing rapidly abroad, and it is used in special structures such as long-span bridges and anti-riot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B40/02C04B111/40
CPCC04B28/06C04B40/0245C04B2201/50C04B2201/20C04B2111/40C04B18/141C04B18/08C04B18/0427C04B24/122C04B18/146C04B14/22C04B14/185C04B14/48C04B2103/302C04B24/38C04B24/16C04B2103/50C04B2103/0068Y02W30/91
Inventor 古龙龙孟书灵张平王军田春锋马旭东卢霄李宁
Owner 中建西部建设新疆有限公司
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