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Ultrahigh-toughness concrete and preparation method thereof

An ultra-high toughness, concrete technology, applied in the field of concrete, can solve the problems of not being able to resist deformation and crack propagation, limiting the toughening effect of steel fibers, reducing the workability of concrete, etc., to improve fatigue resistance and isotropy, and high toughness. , Enhance the effect of interface combination

Active Publication Date: 2021-12-24
斯博锐精细化学品(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in terms of the technology of increasing the toughness of concrete, it is mainly achieved by adding steel fibers. However, although these methods can effectively improve the brittleness and toughness, the improvement range is limited, which limits the toughening effect of steel fibers and reduces the work of concrete. At the same time, too much steel fiber will increase the self-weight of concrete, and steel fiber will greatly reduce the performance of concrete due to corrosion, resulting in concrete damage. Adding organic toughening fiber, although light in weight, can withstand loads Under the action, it is easy to generate stress concentration at the crack, causing crack expansion, and cannot resist deformation and crack expansion
[0005] At present, in the steel bridge deck pavement, due to the large fatigue deformation, the existing concrete is difficult to meet the requirements, so it is urgent to study a concrete material with light weight and high toughness

Method used

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  • Ultrahigh-toughness concrete and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A kind of ultra-high toughness concrete, its raw materials include: 20kg of Portland cement with a strength grade of 42.5, 1kg of water-based epoxy resin emulsion with a solid content of 60%, polypropylene fibers with a diameter of 18-22μm and a length of 2.5-3.5mm 8kg, the specific surface area is 20015m 2 / kg of silica fume 5kg, clay ceramsite 2kg, UEA series expansion agent with a limit expansion rate of 0.03% 2kg, polycarboxylate superplasticizer with a water reduction rate of 20%, 2kg, polyamide polyamine 0.1kg, triethylene Tetramine 6kg, methyl methacrylate 1kg, polyvinyl alcohol fiber 4kg.

[0027] The particle size of clay ceramsite is 5-16mm, and the apparent density is 1200kg / m 3 , bulk density is 700kg / m 3 , Cylinder compressive strength ≥ 6.5MPa.

[0028] The preparation method of the above-mentioned ultra-high toughness concrete comprises the following steps:

[0029] S1. Add triethylenetetramine to 60kg nitrogen nitrogen dimethylformamide, stir evenly ...

Embodiment 2

[0033] A kind of ultra-high toughness concrete, its raw materials include: 40kg of Portland cement with a strength grade of 42.5, 4kg of water-based epoxy resin emulsion with a solid content of 50%, polypropylene fibers with a diameter of 18-22μm and a length of 2.5-3.5mm 4kg, the specific surface area is 29057m 2 1 kg of silica fume per kg, 8 kg of clay ceramsite, 1 kg of UEA series expansion agent with a limited expansion rate of 0.03%, 1 kg of polycarboxylate superplasticizer with a water reduction rate of 40%, 1 kg of alicyclic polyamine, triethylene Tetramine 2kg, methyl methacrylate 3kg, polyvinyl alcohol fiber 1kg.

[0034] The particle size of clay ceramsite is 5-16mm, and the apparent density is 1500kg / m 3 , bulk density is 1100kg / m 3 , Cylinder compressive strength ≥ 6.5MPa.

[0035] The preparation method of the above-mentioned ultra-high toughness concrete comprises the following steps:

[0036] S1. Add triethylenetetramine to 30kg nitrogen nitrogen dimethylfor...

Embodiment 3

[0040] A kind of ultra-high toughness concrete, its raw materials include: 25kg of Portland cement with a strength grade of 42.5, 2kg of water-based epoxy resin emulsion with a solid content of 58%, polypropylene fibers with a diameter of 18-22μm and a length of 2.5-3.5mm 7kg, the specific surface area is 22240m 2 / kg of silica fume 4kg, clay ceramsite 4kg, UEA expansion agent with a limited expansion rate of 0.03% 1.7kg, polycarboxylate superplasticizer with a water reduction rate of 25% 1.8kg, hydroxyethyldiethylenetriamine 0.3kg, triethylenetetramine 5kg, methyl methacrylate 1.5kg, polyvinyl alcohol fiber 3kg.

[0041] The particle size of clay ceramsite is 5-16mm, and the apparent density is 1300kg / m 3 , bulk density is 800kg / m 3 , Cylinder compressive strength ≥ 7MPa.

[0042] The preparation method of the above-mentioned ultra-high toughness concrete comprises the following steps:

[0043] S1. Add triethylenetetramine to 40kg nitrogen nitrogen dimethylformamide, stir ...

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Abstract

The invention discloses an ultrahigh-toughness concrete comprising the raw materials: cement, water-borne epoxy resin emulsion, polypropylene fibers, silica fume, clay ceramsite, an expanding agent, a polycarboxylic acid high-efficiency water reducing agent, a polyamine curing agent, triethylene tetramine, methyl methacrylate and polyvinyl alcohol fibers. The mass ratio of the cement to the water-borne epoxy resin emulsion to the polypropylene fibers to the silica fume to the clay ceramsite to the expanding agent to the polycarboxylic acid high-efficiency water reducing agent to the polyamine curing agent to the triethylene tetramine to the methyl methacrylate to the polyvinyl alcohol fibers is (20-40):(1-4):(4-8):(1-5):(2-8):(1-2):(1-2):(0.1-1):(2-6):(1-3):(1-4). The particle size of the clay ceramsite is 5-16 mm, the apparent density is 1200-1500 kg / m<3>, the bulk density is 700-1100 kg / m<3>, and the cylinder compressive strength is greater than or equal to 6.5 MPa.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to an ultra-high toughness concrete and a preparation method thereof. Background technique [0002] Concrete is a material with a long history and vitality. It has the advantages of a wide range of strength grades, good durability, abundant raw materials, and simple production processes. It is widely used in construction, railways, highways, water conservancy, ports, wharfs and other projects. With the development and use of various additive products, the performance of concrete has been greatly improved, and different additives can improve the performance of different aspects of concrete. [0003] As the most widely used building material in the world today, concrete has the disadvantages of low flexural strength and high brittleness, which leads to cracks or even fractures in concrete, which seriously affects the overall safety and service life of the building, as well as its mec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B24/28C04B24/12C04B24/04C04B20/02C04B18/02C04B16/06
CPCC04B28/04C04B20/023C04B16/0641C04B24/281C04B18/023C04B24/121C04B24/045C04B2201/50C04B16/0633C04B18/146C04B2103/0068C04B2103/302C04B24/287Y02W30/91
Inventor 陆天献
Owner 斯博锐精细化学品(广东)有限公司
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