CN109250975A - A kind of shield duct piece concrete formulation and preparing process - Google Patents
A kind of shield duct piece concrete formulation and preparing process Download PDFInfo
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- CN109250975A CN109250975A CN201811137645.4A CN201811137645A CN109250975A CN 109250975 A CN109250975 A CN 109250975A CN 201811137645 A CN201811137645 A CN 201811137645A CN 109250975 A CN109250975 A CN 109250975A
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- Prior art keywords
- mass fraction
- stone
- sand
- duct piece
- shield duct
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The technical solution of the present invention is as follows: a kind of shield duct piece concrete formulation, including as following formula: high-strength cement, mass fraction 15%-25%；Coarse sand, the fineness modulus of the coarse sand are 2.5-2.8, mass fraction 17%-25%；Fine sand, mass fraction 2.55%-7.5%, the quality of the fine sand of the partial size less than or equal to 0.315mm and the coarse sand mass ratio are (0.15-0.3): 1；Stone, mass fraction 40%-48%；Water, mass fraction 5%-10%；Polycarboxylate water-reducer, mass fraction 0.5%-2%；Defoaming agent, mass fraction is 0.5%-1%, in addition, pass through the order of addition of sand, cement, water and additive, stone, stainless steel fibre and/or carbon fiber, so that mutually being filled between concrete batching, reduce the possibility of bubble generation in partial size proportion so that after shield duct piece molding bubble it is few, closely knit, impervious it is strong, intensity is big.
Description
Technical field
The present invention relates to a kind of formula of concrete and preparing process, in particular to a kind of shield duct piece concrete formulation and
Preparing process.
Background technique
Shield duct piece is the main mounting structure of shield-tunneling construction, is the innermost layer barrier in tunnel, carries and resists soil layer pressure
The effect of power, groundwater pressure and some special loads.Shield duct piece is the permanent lining, secondary lining structure of shield tunnel, shield pipe
Tablet quality is directly related to the total quality and safety in tunnel, influences the waterproof performance and endurance quality in tunnel.
Shield duct piece is concrete formation, and concrete mixture has brought a large amount of bubble into whipping process, and by
In having used polycarboxylic type high performance water reducer, a large amount of micropore has also been introduced, is shaken in cloth and process of vibrating by adhesion type
Dynamic device, though most of bubble has been discharged, in section of jurisdiction two sides, also there are many bubbles, affect apparent mass, more affect
The anti-permeability performance of section of jurisdiction, this is segment prefabricated middle a great problem, in addition, the support strength of section of jurisdiction is insufficient at present, it is shield duct piece
Another technical problem for needing to solve.
Summary of the invention
The object of the present invention is to provide a kind of shield duct piece concrete formulation and preparing process, that is, passes through high-intensitive coagulation
The cooperation of soil formula and gravel size size, has developed high-intensitive shield duct piece concrete formulation, and to its preparing process
It is studied.
The technical solution of the present invention is as follows: a kind of shield duct piece concrete formulation, including as following formula:
High-strength cement, mass fraction 15%-25%, the substrate as shield duct piece intensity；
Coarse sand, the fineness modulus of the coarse sand are 2.5-2.8, mass fraction 17%-25%；
Fine sand, mass fraction 2.55%-7.5%, partial size less than or equal to 0.315mm the fine sand quality with it is described
Coarse sand mass ratio is (0.15-0.3): 1；
By the limitation of coarse sand and fine sand partial size and mass ratio, fine sand is filled with the gap between coarse sand, so that because of sand
And the concrete pore rate formed reduces, so that section of jurisdiction after molding is more closely knit, reduces the formation of bubble.
Stone, mass fraction 40%-48%, the main component as concrete；
Water, mass fraction 5%-10%；
Polycarboxylate water-reducer, mass fraction 0.5%-2%, as water-reducing agent, so that section of jurisdiction molding is fast, bubble is few；
Defoaming agent, mass fraction 0.5%-1% further eliminate the bubble in the forming process of section of jurisdiction.
Preferably, the stone is made of big stone and handstone, and the big cobble-stone diameter is 10mm-20mm, described small
Cobble-stone diameter is 5mm-10mm, and the mass ratio of the big stone and the handstone is (2-3): 1, pass through the cooperation of big handstone
It uses, so that handstone fills the gap between big stone, so that molding section of jurisdiction is more closely knit, reduces internal interstices, also favorably
In the generation for reducing bubble.
Preferably, the concrete formulation further includes that stainless steel fibre and/or carbon fiber 3%-5%, the stainless steel are fine
Dimension and/or carbon fiber are 5mm-30mm, by the addition of certain length stainless steel fibre and/or carbon fiber, so that fiber and mixed
Netted intertexture is formed between solidifying soil, the intensity of molding shield duct piece greatly improved.
Preferably, a kind of shield duct piece concrete formulation, including as following formula:
High-strength cement, 20%；Coarse sand, the fineness modulus of the coarse sand are 2.5, mass fraction 20%；Fine sand, quality point
Number is 7.5%, and the quality of the fine sand of the partial size less than or equal to 0.315mm and the coarse sand mass ratio are 0.3:1；Stone, matter
Measuring score is 43%；Water, mass fraction 5%；Polycarboxylate water-reducer, mass fraction 1%；Defoaming agent, mass fraction are
0.5%；Stainless steel fibre and/or carbon fiber 3%.
By above-mentioned shield duct piece concrete formulation, pass through the proportion of coarse sand and fine sand, the use of water-reducing agent, defoaming agent
Use so that section of jurisdiction in forming process, reduces the generation of bubble on source, in addition, also add stainless steel fibre and/
Or carbon fiber, so that the intensity of shield duct piece further increases.
The present invention also provides a kind of preparing process of shield duct piece concrete, include the following steps:
The first step, weight ratio according to the above technical scheme, weigh coarse sand and fine sand, and mix in proportion；
Second step adds cement in the sand mixture into the first step and is uniformly mixed；
Third step is added water, polycarboxylate water-reducer and defoaming agent into the mixture that second step obtains and is uniformly mixed；
4th step adds stone, stainless steel fibre and/or carbon fiber into the mixture that third step obtains, and mixes equal
It is even, obtain concrete.
By the order of addition of sand, cement, water and additive, stone, stainless steel fibre and/or carbon fiber, so that mixed
It is mutually filled between solidifying soil ingredient, the possibility of bubble generation is reduced in partial size proportion, so that after shield duct piece molding
Bubble is few, closely knit, impervious by force, intensity is big.
Specific embodiment
It below in conjunction with specific embodiment, elaborates to technical solution of the present invention, it should be understood that these embodiments are only
For illustrating the present invention rather than limiting the scope of the invention, after the present invention has been read, those skilled in the art are to this
The modification of the various equivalent forms of invention is each fallen in the application range as defined in the appended claims.
Embodiment 1
The technical solution of the present invention is as follows: a kind of shield duct piece concrete formulation, including as following formula:
High-strength cement, mass fraction 15%, the substrate as shield duct piece intensity；
Coarse sand, the fineness modulus of the coarse sand are 2.8, mass fraction 25%；
Fine sand, mass fraction 7.5%, the quality of the fine sand of the partial size less than or equal to 0.315mm and the arenose
Amount is than being 0.15:1；
By the limitation of coarse sand and fine sand partial size and mass ratio, fine sand is filled with the gap between coarse sand, so that because of sand
And the concrete pore rate formed reduces, so that section of jurisdiction after molding is more closely knit, reduces the formation of bubble.
Stone, mass fraction 40%, the main component as concrete；
Water, mass fraction 10%；
Polycarboxylate water-reducer, mass fraction 1.5%, as water-reducing agent, so that section of jurisdiction molding is fast, bubble is few；
Defoaming agent, mass fraction 1% further eliminate the bubble in the forming process of section of jurisdiction.
Preferably, the stone is made of big stone and handstone, and the big cobble-stone diameter is 10mm-20mm, described small
Cobble-stone diameter is 5mm-10mm, and the mass ratio of the big stone and the handstone is 2:1, is made by the cooperation of big handstone
With so that handstone fills the gap between big stone, so that molding section of jurisdiction is more closely knit, reduction internal interstices are also beneficial to
Reduce the generation of bubble.
By above-mentioned shield duct piece concrete formulation, pass through the proportion of coarse sand and fine sand, the use of water-reducing agent, defoaming agent
It uses, so that section of jurisdiction in forming process, reduces the generation of bubble on source, so that bubble after shield duct piece molding
Less, closely knit, impervious it is strong, intensity is big.
The preparing process of upper shield duct piece concrete, includes the following steps:
The first step, weight ratio according to the above technical scheme, weigh coarse sand and fine sand, and mix in proportion；
Second step adds cement in the sand mixture into the first step and is uniformly mixed；
Third step is added water, polycarboxylate water-reducer and defoaming agent into the mixture that second step obtains and is uniformly mixed；
4th step is added stone into the mixture that third step obtains, and is uniformly mixed, and concrete is obtained.
By the order of addition of sand, cement, water and additive, stone, so that mutually filled between concrete batching,
Reduce the possibility of bubble generation in partial size proportion, so that bubble is few, closely knit, impervious strong, strong after shield duct piece molding
Degree is big.
Embodiment 2
The technical solution of the present invention is as follows: a kind of shield duct piece concrete formulation, including as following formula:
High-strength cement, mass fraction 25%, the substrate as shield duct piece intensity；
Coarse sand, the fineness modulus of the coarse sand are 2.5-2.8, mass fraction 17%；
Fine sand, mass fraction 3%, the quality and the coarse sand quality of the fine sand of the partial size less than or equal to 0.315mm
Than for 0.3:1；
By the limitation of coarse sand and fine sand partial size and mass ratio, fine sand is filled with the gap between coarse sand, so that because of sand
And the concrete pore rate formed reduces, so that section of jurisdiction after molding is more closely knit, reduces the formation of bubble.
Stone, mass fraction 42%, the main component as concrete；
Water, mass fraction 5%；
Polycarboxylate water-reducer, mass fraction 2%, as water-reducing agent, so that section of jurisdiction molding is fast, bubble is few；
Defoaming agent, mass fraction 1% further eliminate the bubble in the forming process of section of jurisdiction；
Stainless steel fibre and/or carbon fiber 5%, the stainless steel fibre and/or carbon fiber are 5mm-30mm, by certain
The addition of length stainless steel fibre and/or carbon fiber greatly improved into so that forming netted intertexture between fiber and concrete
The intensity of type shield duct piece.
Preferably, the stone is made of big stone and handstone, and the big cobble-stone diameter is 10mm-20mm, described small
Cobble-stone diameter is 5mm-10mm, and the mass ratio of the big stone and the handstone is (2-3): 1, pass through the cooperation of big handstone
It uses, so that handstone fills the gap between big stone, so that molding section of jurisdiction is more closely knit, reduces internal interstices, also favorably
In the generation for reducing bubble.
By above-mentioned shield duct piece concrete formulation, pass through the proportion of coarse sand and fine sand, the use of water-reducing agent, defoaming agent
Use so that section of jurisdiction in forming process, reduces the generation of bubble on source, in addition, also add stainless steel fibre and/
Or carbon fiber, so that the intensity of shield duct piece further increases.
The preparing process of above-mentioned shield duct piece concrete, includes the following steps:
The first step, weight ratio according to the above technical scheme, weigh coarse sand and fine sand, and mix in proportion；
Second step adds cement in the sand mixture into the first step and is uniformly mixed；
Third step is added water, polycarboxylate water-reducer and defoaming agent into the mixture that second step obtains and is uniformly mixed；
4th step adds stone, stainless steel fibre and/or carbon fiber into the mixture that third step obtains, and mixes equal
It is even, obtain concrete.
By the order of addition of sand, cement, water and additive, stone, stainless steel fibre and/or carbon fiber, so that mixed
It is mutually filled between solidifying soil ingredient, the possibility of bubble generation is reduced in partial size proportion, so that after shield duct piece molding
Bubble is few, closely knit, impervious by force, intensity is big.
Claims (5)
1. a kind of shield duct piece concrete formulation, which is characterized in that including as following formula:
High-strength cement, mass fraction 15%-25%；
Coarse sand, the fineness modulus of the coarse sand are 2.5-2.8, mass fraction 17%-25%；
Fine sand, mass fraction 2.55%-7.5%, the quality of the fine sand of the partial size less than or equal to 0.315mm and the coarse sand
Mass ratio is (0.15-0.3): 1；
Stone, mass fraction 40%-48%；
Water, mass fraction 5%-10%；
Polycarboxylate water-reducer, mass fraction 0.5%-2%；
Defoaming agent, mass fraction 0.5%-1%.
2. a kind of shield duct piece concrete formulation as described in claim 1, which is characterized in that the stone is by big stone and small
Stone composition, the big cobble-stone diameter be 10mm-20mm, the handstone partial size be 5mm-10mm, the big stone with it is described
The mass ratio of handstone is (2-3): 1.
3. a kind of shield duct piece concrete formulation as claimed in claim 1 or 2, which is characterized in that the concrete formulation is also
Including stainless steel fibre and/or carbon fiber 3%-5%, the stainless steel fibre and/or carbon fiber are 5mm-30mm.
4. a kind of shield duct piece concrete formulation as claimed in claim 3, which is characterized in that including as following formula:
High-strength cement, 20%；
Coarse sand, the fineness modulus of the coarse sand are 2.5, mass fraction 20%；
Fine sand, mass fraction 7.5%, the quality of the fine sand of the partial size less than or equal to 0.315mm and the coarse sand mass ratio
For 0.3:1；
Stone, mass fraction 43%；
Water, mass fraction 5%；
Polycarboxylate water-reducer, mass fraction 1%；
Defoaming agent, mass fraction 0.5%；
Stainless steel fibre and/or carbon fiber 3%.
5. a kind of preparing process of shield duct piece concrete, which comprises the steps of:
The first step, by weight ratio described in any claim 1-4, weigh coarse sand and fine sand, and mix in proportion；
Second step adds cement in the sand mixture into the first step and is uniformly mixed；
Third step is added water, polycarboxylate water-reducer and defoaming agent into the mixture that second step obtains and is uniformly mixed；
4th step is added stone, stainless steel fibre and/or carbon fiber into the mixture that third step obtains, and is uniformly mixed, and obtains
To concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811137645.4A CN109250975A (en) | 2018-09-28 | 2018-09-28 | A kind of shield duct piece concrete formulation and preparing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811137645.4A CN109250975A (en) | 2018-09-28 | 2018-09-28 | A kind of shield duct piece concrete formulation and preparing process |
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| Publication Number | Publication Date |
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| CN109250975A true CN109250975A (en) | 2019-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811137645.4A Pending CN109250975A (en) | 2018-09-28 | 2018-09-28 | A kind of shield duct piece concrete formulation and preparing process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111333388A (en) * | 2020-03-27 | 2020-06-26 | 江苏昆腾新材料科技有限公司 | Environment-friendly concrete for shield segment pouring and preparation process thereof |
| CN112159171A (en) * | 2020-09-21 | 2021-01-01 | 湖北工业大学 | Early-strength dense concrete for shield segment and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041336A (en) * | 2015-07-06 | 2015-11-11 | 中国建筑股份有限公司 | Ultra-high performance hybrid fiber concrete shield segment and preparation method thereof |
-
2018
- 2018-09-28 CN CN201811137645.4A patent/CN109250975A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041336A (en) * | 2015-07-06 | 2015-11-11 | 中国建筑股份有限公司 | Ultra-high performance hybrid fiber concrete shield segment and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 刘文清: "《最新水利水电工程一级施工实用技术与管理》", 31 August 2001, 吉林人民出版社 * |
| 潘全祥: "《建筑结构工程施工百问》", 30 June 2000, 中国建筑工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111333388A (en) * | 2020-03-27 | 2020-06-26 | 江苏昆腾新材料科技有限公司 | Environment-friendly concrete for shield segment pouring and preparation process thereof |
| CN111333388B (en) * | 2020-03-27 | 2022-01-25 | 江苏昆腾新材料科技有限公司 | Environment-friendly concrete for shield segment pouring and preparation process thereof |
| CN112159171A (en) * | 2020-09-21 | 2021-01-01 | 湖北工业大学 | Early-strength dense concrete for shield segment and preparation method thereof |
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Application publication date: 20190122 |