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Concrete material used for pouring pier stud, admixture and usage method thereof

A concrete admixture and concrete technology, applied in the field of building materials, can solve problems such as honeycomb, affecting the appearance of bridge pier columns, and discounting the stability of pier columns

Inactive Publication Date: 2019-01-11
北京城建十六建筑工程有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inappropriate proportion of concrete materials will cause cracks, honeycombs, pockmarks, cavities and air bubbles to appear after the formwork removal of the pier columns. On the one hand, it will affect the appearance of the bridge pier columns; The stability of the pier is greatly reduced

Method used

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  • Concrete material used for pouring pier stud, admixture and usage method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In the research and development process of the concrete admixture for pouring pier columns of the present invention, the ratio of each component is adjusted, and the representative ratio is as follows:

[0039] lignosulfonate

8

10

11

12

13

14

15

16

17

18

19

20

21

calcium nitrate

1

1

4.5

2

3.5

2.5

3

3

2

4

1.5

5

5.5

sodium nitrite

0.1

0.5

0.6

1.3

0.9

1.5

1

1.4

1.7

0.8

1.8

2

2.2

Zeolite powder

0.5

1

3.5

1.5

4.5

2.5

3

1

3.5

4

2

5

6

hemp fiber

0.5

1

4.5

1.5

2

2.5

3

3.5

4

4

1

5

6

fly ash

45

50

54

56

58

60

62

64

66

68

53

70

72

[0040] After numerous comparative experiments and repeated verifications, it was found that when the following proportions of the ingredients were selected:

[0041] 10-20 pa...

Embodiment 2

[0049] In the research and development process of the concrete material for pouring pier columns of the present invention, the ratio of each component is adjusted, and the representative ratio is as follows:

[0050]

[0051] After numerous comparative experiments and repeated verifications, it was found that when the following proportions of the ingredients were selected:

[0052] Portland cement 80-120 parts, gravel 350-420 parts, sand 220-280 parts, admixture 2-26 parts; water 40-120 parts. The concrete for pouring piers of the present invention can achieve expected effects, that is, the prepared concrete piers will not have cracks, honeycombs, pockmarks, cavities, air bubbles, etc., and have good earthquake resistance.

[0053] The preferred solution is:

[0054] Portland cement 90-110 parts, gravel 370-415 parts, sand 220-280 parts, admixture 2-26 parts; water 40-120 parts.

[0055] The concrete material for pouring piers of the present invention works best when the fo...

Embodiment 3

[0059] Concrete admixture can be prepared by various methods, such as all mixing, stirring, mixing in batches, stirring, adding separately, etc., the inventors have found through countless experiments that lignosulfonate, fly ash, nitrous acid Mix and stir with sodium, then add zeolite powder and hemp fiber to stir, the effect of the prepared concrete admixture and the concrete prepared by it is the best.

[0060] The specific steps are:

[0061] S1. Add 10-20 parts of lignosulfonate, 50-70 parts of fly ash, 1-5 parts of calcium nitrate, and 0.5-2 parts of sodium nitrite into the mixer and stir for 5-10 minutes;

[0062] Wherein, the ratio of each component can be adjusted within their respective limited ranges, and the stirring time can be changed between 5-10 minutes.

[0063] S2. Add 1-5 parts of zeolite powder and 1-5 parts of hemp fiber into the mixer and stir for 10-18 minutes.

[0064] Wherein, the ratio of each component can be adjusted within their respective limite...

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Abstract

The invention relates to a concrete material used for pouring a pier stud, an admixture and a usage method of the concrete material. The concrete material comprises the following components in parts by weight: 80 to 120 parts of Portland cement, 350 to 420 parts of cobblestone, 220 to 280 parts of sands, 2 to 26 parts of an admixture, and 40 to 120 parts of water; wherein, the admixture comprisesthe following components in parts by weight: 10-20 parts of lignosulfonate, 50-70 parts of fly ash, 1-5 parts of calcium nitrate, 0.5-2 parts of sodium nitrite, 1-5 parts of zeolite powder, and 1-5 parts of hemp fiber. The concrete material adopts the admixture, so that when the concrete is used for pouring the large pier stud, the good appearance quality can be presented, and the phenomena such as segregation, cracking, honeycomb, spongy surface, cavity and bubbles can be effectively avoided. The admixture can be used for concrete materials of the pier stud for bridges, high-speed rails, viaducts, and the like, and can be also used in combination with steel bars for antivibration resistance.

Description

technical field [0001] The invention relates to a concrete material for pouring pier columns, an admixture and a using method thereof, and belongs to the technical field of building materials. Background technique [0002] Pier column, that is, the lower load-bearing object used to carry the upper structure in civil engineering. Most of the cross-sections of piers are circular, and there are also heterosexual piers such as ellipse, square, curve, and parabola. It is an important part of highway bridges, railway bridges, sidewalks and other bridges, overpasses, ramp bridges, flyovers and other projects. [0003] As an important part of bridges, railway bridges, viaducts, etc., pier columns have a profound impact on the overall stability of bridges in terms of appearance and quality. The piers are generally made of concrete and steel bars. Concrete is a general term for engineering composite materials in which aggregates are cemented into a whole by cementitious materials. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B24/18
CPCC04B28/04C04B40/0039C04B14/02C04B14/06C04B24/18C04B18/08C04B22/085C04B14/047C04B18/248
Inventor 王宁阳周志华林松李佳
Owner 北京城建十六建筑工程有限责任公司
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