Reactive powder concrete as well as preparation method and application thereof

A technology of reactive powder and concrete, applied in the field of concrete materials, can solve the problem of insufficient strength of reactive powder concrete, and achieve the effects of good resistance, high compressive strength and tensile strength, and less cement.

Pending Publication Date: 2021-11-12
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: In order to overcome the defect of insufficient strength of active powder concrete in the prior art, the present invention provides an active powder concrete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: The ingredients are 690 parts of cement, 100 parts of silica fume, 250 parts of fly ash, 357 parts of quartz sand of 30-40 mesh, 373 parts of 45-100 mesh, 302 parts of 100-150 mesh, 156 parts of steel fiber, water 210 parts, 32 parts of water reducer, 70 parts of nano minerals, 26 parts of graphene oxide.

[0029] Among them, the cement is Lvyang brand P·O 52.5 ordinary Portland cement. The indicators of the cement meet the quality requirements of GB175-2007 "Portland Cement, Ordinary Portland Cement".

[0030] Fly ash is Class I fly ash produced by Kuoteng Mineral Products Processing Plant in Lingshou County, with a density of 2.6g / cm 3 , the specific surface area is 600m 2 / kg.

[0031] Silica fume is selected from the silica fume produced by Shanghai Shengkuo Chemical Technology Co., Ltd. SiO 2 The content is 94%, and the bulk density is 330kg / m 3 , bulk density is 1700kg / m 3 , with an average particle size of 0.2μm and a specific surface area of ​​...

Embodiment 2

[0050] Embodiment 2, embodiment 3 are all consistent with embodiment 1 except the proportioning of composition.

[0051] Among them, the ingredients of Example 2 are 670 parts of cement, 105 parts of silica fume, 265 parts of fly ash, 377 parts of quartz sand of 30-40 mesh, 364 parts of 45-100 mesh, 291 parts of 100-150 mesh, and 167 parts of steel fiber , 198 parts of water, 35 parts of water reducer, 74 parts of nano minerals, and 25 parts of graphene oxide.

[0052] Its compressive strength is shown in Table 2:

[0053] The active powder concrete compressive strength of table 2 embodiment 2

[0054] Test block number Compressive strength (MPa) Test block 1 228.3 Test block 2 233.6 Test block 3 218.4 average value 226.8

Embodiment 3

[0055] The composition of embodiment 3 is 710 parts of cement, 110 parts of silica fume, 234 parts of fly ash, 381 parts of quartz sand 30-40 mesh, 352 parts of 45-100 mesh, 294 parts of 100-150 mesh, 151 parts of steel fiber, water 218 parts, 31 parts of water reducer, 68 parts of nano minerals, 26 parts of graphene oxide.

[0056] Its compressive strength is shown in Table 3:

[0057] The active powder concrete compressive strength of table 3 embodiment 3

[0058] Test block number Compressive strength (MPa) Test block 1 254.2 Test block 2 244.7 Test block 3 262.6 average value 253.8

[0059] It can be seen that the average compressive strength of the active powder concrete of the present invention is 225-270MPa, and can even reach more than 270MPa in some specific proportions.

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Abstract

The invention discloses reactive powder concrete as well as a preparation method and application thereof. The reactive powder concrete is prepared from the following components in parts by weight: 670 to 710 parts of cement, 80 to 120 parts of silica fume, 230 to 270 parts of fly ash, 1000 to 1050 parts of quartz sand, 170 to 220 parts of water, 31 to 35 parts of water reducing agent, 130 to 170 parts of steel fiber, 60 to 80 parts of nano mineral and 25 to 27 parts of graphene oxide. According to the present invention, the super-dense structure system can be formed, the water resistance is high, the corrosion caused by external substances is not easily caused, the corrosion caused by chloride ions can be well resisted, the durability of a member is improved, and the compressive strength and the tensile strength are high. The average value of the compressive strength is 225-270 MPa, and the compressive strength can even reach 270 MPa or above according to certain specific proportions. The preparation method is low in cement consumption, low in CO2 emission, environment-friendly and beneficial to industrial production and popularization.

Description

technical field [0001] The invention belongs to the technical field of concrete materials, and in particular relates to an active powder concrete, its preparation method and its application. Background technique [0002] With the rapid development of modern buildings, super-long-span and super-high-rise building structures are widely used. The higher the height of the building, the greater the vertical load borne by the frame columns on the ground floor, which makes the frame columns too large in section, occupying too much usable area and shear span Problems other than small stubs. In order to meet the performance requirements of light weight, high-rise, long-span, good corrosion resistance, high durability and other aspects of engineering structures, the use of high-performance materials can significantly improve the bearing capacity of components and structures, reduce material consumption, reduce resource consumption and costly conducive to sustainable development. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04B28B1/08B28B1/52B28B11/24B28C5/40
CPCC04B28/04B28C5/402B28B1/523B28B1/08B28B11/245C04B2201/50C04B18/146C04B18/08C04B14/06C04B14/48C04B2103/302C04B22/06C04B14/062
Inventor 杨洋潘登邢翔
Owner YANGZHOU UNIV
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