High-strength ultra-high-toughness concrete and preparation method thereof

A technology for ultra-high toughness, concrete

Active Publication Date: 2016-09-21
上海同延建筑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a high-strength and ultra-high-strength composite material with high compressive strength, high tensile strength, high ductility, good energy dissipation capacity and elastic modu

Method used

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  • High-strength ultra-high-toughness concrete and preparation method thereof
  • High-strength ultra-high-toughness concrete and preparation method thereof
  • High-strength ultra-high-toughness concrete and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0038] Example 1: (There are three products in this example, and their numbers are marked as 1-1,1-2,1-3)

[0039] The high-strength and ultra-high ductility concrete in this implementation includes P.O.52.5 ordinary Portland cement, ultra-fine slag powder, ultra-fine fly ash, silica fume, quartz powder, quartz sand, water reducing agent, tap water and polyethylene fiber. The components are shown in Table 1 below, and each part in the table is the content of parts by weight. In Table 1, the length of the polyethylene fiber is 12 mm and the aspect ratio is 400.

[0040] Table 1 Product components and parts by weight content

[0041] Label

[0042] The preparation process of the high-strength and ultra-high ductility concrete in this example is as follows:

[0043] (1) Add 600 parts of cement, 150 parts of silica fume, 200 parts of ultra-fine slag powder, 200 parts of ultra-fine fly ash, 200 parts of quartz powder, and 850 parts of quartz sand into the mixer, and mix the dry powder f...

Example Embodiment

[0051] Example 2: (There are two products in this example, and their numbers are respectively marked as 2-1 and 2-2)

[0052] The high-strength and ultra-high ductility concrete of this embodiment includes P.O.52.5 ordinary Portland cement, slag powder, first-grade fly ash, silica fume, quartz powder, quartz sand, water reducing agent, tap water and polyethylene fiber. The components are shown in Table 3, each part in the table is the content of parts by weight. Among them, the length of polyethylene fiber in the product 2-1 in Table 3 is 9mm, the aspect ratio is 300, and the length of polyethylene fiber in the product 2-2 It is 12mm and the aspect ratio is 400.

[0053] Table 3 Product components and parts by weight content

[0054] Label

[0055] The preparation process of the high-strength and ultra-high ductility concrete in this example is as follows:

[0056] (1) Add 600 parts of cement, 150 parts of silica fume, 200 parts of slag powder, 200 parts of first-grade fly ash, 20...

Example Embodiment

[0064] Example 3: (There are three products in this example, and their numbers are marked as 3-1, 3-2, 3-3)

[0065] The high-strength and ultra-high ductility concrete in this implementation includes P.O.52.5 ordinary Portland cement, ultra-fine slag powder, ultra-fine fly ash, silica fume, quartz powder, quartz sand, water reducing agent, tap water and polyethylene fiber. The components are shown in Table 5 below, and each part in the table is the content of parts by weight. In Table 5, the length of the polyethylene fiber is 12 mm and the aspect ratio is 400.

[0066] Table 5 Product components and parts by weight content

[0067] Label

[0068] The preparation process of the high-strength and ultra-high ductility concrete in this embodiment is as follows:

[0069] (1) Add 600 parts of cement, 150 parts of silica fume, 400 parts of superfine slag powder, 200 parts of superfine fly ash, and 850 parts of quartz sand to the mixer, and mix the dry powder for 2-3 minutes, and mix wel...

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Abstract

The invention relates to high-strength ultra-high-toughness concrete and a preparation method thereof. The concrete is prepared from, by weight, 400-800 parts of cement, 100-250 parts of silica fume, 200-500 parts of slag powder, 200-500 parts of fly ash, 200-500 parts of quartz powder, 800-1,000 parts of quartz sand, 20-40 parts of a water reducing agent, 180-250 parts of water and 15-25 parts of polyethylene fibers. When the concrete is prepared, the cement, the silica fume, the slag powder, the fly ash, the quartz powder and the quartz sand are added into a stirrer by weight, and the dry powder is stirred for 2-3 min and fully mixed to be uniform; after stirring is finished, the mixed dry powder is transferred into a mold, vibrating is conducted for 1-2 min for molding, curing and demolding are conducted, and then the high-strength ultra-high-toughness concrete is prepared. Compared with the prior art, the concrete has the advantages that the compressive strength reaches 120-150 MPa, the breaking strength reaches 30-50 MPa, the tensile strength reaches 15-22 MPa, and the tensile elongation reaches 4%-8% and has the very good application prospect.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a high-strength and ultra-high-toughness concrete and a preparation method thereof. Background technique [0002] Ultra high performance concrete (UHPC for short) has the characteristics of high specific strength, large load capacity, resource and energy saving, and excellent durability. It can meet the requirements of lightweight, high-rise, long-span and high durability in civil engineering It is the main development direction of concrete technology. UHPC was developed by French researchers using conventional materials in the 1990s with ultra-high compressive strength, ultra-high tensile strength, high toughness and high durability. UHPC materials are based on the principle of the closest packing, using a high-density cement-based uniform system model, removing coarse aggregates above 2mm, and adding a certain volume of micro-steel fibers together with high temperatur...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/146C04B18/141C04B18/08C04B14/06C04B16/0633C04B2103/302
Inventor 俞可权余江滔
Owner 上海同延建筑科技有限公司
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