CN108147698A - A kind of shield duct piece additive and preparation method - Google Patents
A kind of shield duct piece additive and preparation method Download PDFInfo
- Publication number
- CN108147698A CN108147698A CN201711341517.7A CN201711341517A CN108147698A CN 108147698 A CN108147698 A CN 108147698A CN 201711341517 A CN201711341517 A CN 201711341517A CN 108147698 A CN108147698 A CN 108147698A
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- CN
- China
- Prior art keywords
- agent
- duct piece
- shield duct
- water
- piece additive
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention provides a kind of shield duct piece additives, include the component of following mass percent：High performance water reducing agent of polyocarboxy acid 25.75~50.25%, early strength agent 1~3%, air entraining agent 0.01~0.5%, polyethers synthesize antifoaming agent 0.05~0.8%, brightener 0.4~3.5%, viscosity thixotropic agent 0.05~2%, surplus are water, and the present invention also provides the preparation methods of above-mentioned shield duct piece additive.Use shield duct piece additive provided by the invention, can be under early strong setting time requirement, control concrete smaller slump while, also can guarantee concrete thixotropy and easy property requirement living, save the construction time of worker, it is more than form removal requirement that can also make concrete intensity in 8 hours, the steam-cured time of concrete is shortened, section of jurisdiction factory mold turnover is accelerated, improves production efficiency, in addition, form removal rear surface is beautiful, reduces the process of repairing, further saves man power and material.
Description
Technical field
The invention belongs to building material technical fields, and in particular to a kind of shield duct piece additive.
Background technology
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 water resistance and endurance quality in tunnel.Substantially, to shield
The quality requirement of structure section of jurisdiction is exactly the requirement to concrete, need smooth surfacing, uniform color, corner angle it is clearly demarcated, without clashing and breaking
And pollution.In addition, since section of jurisdiction will be reduced in process of production between plastering time and quiet stopping time, shorten the steam-cured time, accelerate life
Speed is produced, this requires additive has early by force and early solidifying performance, especially additive it is noted that the ingredient of bleed and slow setting,
This is because section of jurisdiction production, generally using steam-cured technology, if retardation phenomenon occurs, section of jurisdiction surface has just had bulging, loose and bubble
Phenomenon seriously affects the quality and appearance of section of jurisdiction.Additive will also have higher water-reducing rate and have well to cement and admixture
Adaptability.The water-reducing agent being generally used on section of jurisdiction at present is naphthalene system, melamine system, polycarboxylic-acid etc., and existing product is used in pipe
On piece, some significantly will appear the more bubbles in surface, rough, the dim non-uniform phenomenon of color and luster, early strong, the early solidifying effect of some
Difference, mold turnover primary time are at least 12 hours, and volume stability is poor, and it is small to meet shield duct piece geometric dimension deviation
It is required that relatively difficult, some alkali contents are high, also likely cause alkali-aggregate reaction.
CN102531457A discloses a kind of metro shield section of jurisdiction special additive and preparation and application, the additive
It is made under certain process conditions of carboxylate water-reducing agent, antifoaming agent, early strength agent, carboxymethyl cellulose, the additive is early strong,
Early solidifying effect is good, the mold turnaround time is short, with the volume stability of concrete of product configuration of the present invention is good, the smooth nothing of surfacing
Bubble, uniform color, and alkali content is very low, can greatly improve the durability of section of jurisdiction component, particularly suitable for doing metro shield pipe
The special additive of piece, however the water-reducing rate of the invention can also further improve.CN102557517A discloses a kind of efficient
Metro shield section of jurisdiction additive and preparation and application, the additive are by carboxylate water-reducing agent, JF-2 high efficiency water reducing agents, disappear
Made of under certain process conditions, the additive is of low cost, early for infusion dimethicone, early strength agent and carboxymethyl cellulose
By force, the early solidifying volume stability of concrete that effect is good, the mold turnaround time is short, prepares is good, surface compact bubble is few, is a kind of high
The metro shield section of jurisdiction additive of effect, however the water-reducing rate of the invention additive has no concrete numerical value.CN106431063A is disclosed
A kind of rush for metro shield section of jurisdiction coagulates Early-strength polycarboxylate superplasticizer, by water reducing type PCE mother liquors, promotees solidifying early-strength PCE
Mother liquor, air entraining agent, antifoaming agent, coagulant, corrosion inhibitor, preservative and suitable quantity of water composition, the invention is according to concrete admixture
Compound mechanism, propose with water reducing type, promote based on solidifying early-strength polycarboxylic acids mother liquor, be aided with the air entraining agent with excellent compatibility,
The components such as antifoaming agent, coagulant, corrosion inhibitor, preservative to form uniform solution, when obtaining suitable condensation through mixing, stirring
Between and early strength, so as to prepare a kind of high-efficiency water-reducing agent of poly-carboxylic acid for metro shield section of jurisdiction, however what the invention provided
The water-reducing effect of water-reducing agent has no that concrete numerical value is reported always.
Shield duct piece factory will carry out centralized production to section of jurisdiction, and if ensureing quality, shield duct piece additive is even more important.Outside
Setting time (early strength) the offer guarantee for adding agent that can be concrete in shield duct piece production process, has concrete good
Thixotropy, while additive can make concrete coagulation rear surface beautiful, ensure that the workability of concrete is excellent, improve coagulation
The intensity and durability of soil.In conclusion existing section of jurisdiction additive, there are section of jurisdiction be molded poor appearance after form removal, hole,
Colour-difference and there is the problems such as water wave line, in addition, the formula of existing section of jurisdiction additive also pays no attention to the slump for controlling concrete
To think, concrete thixotropy is poor, and working performance is poor, and construction plastering is difficult, meanwhile, control of the existing section of jurisdiction additive to setting time
Also it is undesirable, it is difficult to reach the workability requirement that section of jurisdiction factory requirement section of jurisdiction is demoulded in 8 hours.
Invention content
To solve in the prior art, using shield pipe additive, the shield duct piece poor appearance produced, aberration be apparent,
Have water wave line, workability difference it is low with early strength cause to demould the problem of slow, an object of the present invention is to provide a kind of shield
Structure section of jurisdiction additive.
The second object of the present invention is to provide the preparation method of above-mentioned section of jurisdiction additive.
To achieve the above object, the present invention uses following technical scheme：
A kind of shield duct piece additive includes the component of following mass percent：
Poly carboxylic acid series water reducer 20~55%,
Early strength agent 1~5%,
Air entraining agent 0.01~1%,
Polyethers synthesize antifoaming agent 0.05~1%,
Brightener 0.2~4%,
Viscosity thixotropic agent 0.01~3%,
Surplus is water.
Preferably, the additive includes the component of following mass percent：
Poly carboxylic acid series water reducer 25.75~50.25%,
Early strength agent 1~3%,
Air entraining agent 0.01~0.5%,
Polyethers synthesize antifoaming agent 0.05~0.8%,
Brightener 0.4~3.5%,
Viscosity thixotropic agent 0.05~2%,
Surplus is water.
Preferably, the high performance water reducing agent of polyocarboxy acid is ZY-HS water-reducing agents.
It is further preferred that containing admittedly for the high performance water reducing agent of polyocarboxy acid is 35~45%.
Preferably, the early strength agent is at least one of triethanolamine, diethanol monoisopropanolamine and calcium formate.
Preferably, the air entraining agent is at least one of polyether phosphate and lauryl sodium sulfate.
Preferably, polyethers synthesis antifoaming agent is bamboo this grease antifoaming agent.
Preferably, the brightener is glycerine.
Preferably, the viscosity thixotropic agent is talcum powder.
A kind of preparation method of shield duct piece additive, includes the following steps：
(1) it determines each group distribution ratio, water is first added in container, sequentially add high performance water reducing agent of polyocarboxy acid, morning by force
It is mixed evenly after agent, polyethers synthesis antifoaming agent, brightener and viscosity thixotropic agent；
(2) it adds in air entraining agent and stirs evenly to get finished product.
Beneficial effects of the present invention
1st, shield duct piece additive provided by the invention can control the smaller slump of concrete under early strong setting time requirement
Also concrete thixotropy and easy property requirement living be can guarantee while spending, saved the construction time of worker；
2nd, shield duct piece additive provided by the invention can make concrete intensity in 8 hours be more than form removal requirement, shorten
It the steam-cured time of concrete, section of jurisdiction factory mold turnover is accelerated, improves production efficiency；
3rd, using shield duct piece additive provided by the invention, form removal rear surface is beautiful, reduces the process of repairing, into one
Step saves man power and material.
Specific embodiment
The following is specific embodiments of the present invention, and technical scheme of the present invention is further described in conjunction with the embodiments,
But the present invention is not limited to these embodiments.
Embodiment 1
A kind of preparation method of shield duct piece additive is present embodiments provided, is included the following steps：
(1) it determines each group distribution ratio, water is first added in container, sequentially add high performance water reducing agent of polyocarboxy acid, morning by force
It is mixed evenly after agent, polyethers synthesis antifoaming agent, brightener and viscosity thixotropic agent；
(2) it adds in air entraining agent and stirs evenly to get finished product.
Embodiment 2
The preparation method provided using embodiment 1, the present embodiment are prepared for the shield duct piece additive of 7 kinds of different ratios
A~G, specific formula are as shown in table 1.
The specific raw material components of 1 additive A~G of table
Embodiment 3
Experiment designs concrete mix according to subway segment strength grade C50, and each material utilization amount of concrete mix is shown in
Table 2.
Each material utilization amount in 2 concrete of table
| Material | Cement | Flyash | River sand | Stone | Water | Additive |
| Quality (kg/m3) | 390 | 60 | 708 | 1105 | 145 | 4.5 |
Additive A~G is applied in above-mentioned concrete, shield duct piece additive usage uses glue material (cement+fine coal
Ash) total dosage volume 1.0%, carry out concrete performance measure, measurement result according to the method in the standards such as GB/50152-92
It is listed in table 3.
Table 3 is added to the performance test results of the correspondence concrete of additive A~G
By being detected above it is found that shield duct piece additive provided by the invention, can make fresh concrete items Testing index
Existing common section of jurisdiction additive in the market is substantially better than, it is low and because of early strong demand significantly to solve section of jurisdiction early strength of concrete
And the problem of concrete is caused to go out machine thixotropy, easy poor performance living and the section of jurisdiction poor appearance being molded after form removal, additionally it is possible to easily real
Working performance requirement of the existing shield duct piece factory to section of jurisdiction concrete.
Claims (10)
1. a kind of shield duct piece additive, which is characterized in that include the component of following mass percent：
Poly carboxylic acid series water reducer 20~55%,
Early strength agent 1~5%,
Air entraining agent 0.01~1%,
Polyethers synthesize antifoaming agent 0.05~1%,
Brightener 0.2~4%,
Viscosity thixotropic agent 0.01~3%,
Surplus is water.
2. shield duct piece additive according to claim 1, which is characterized in that the additive includes following quality hundred
Divide the component of ratio：
Poly carboxylic acid series water reducer 25.75~50.25%,
Early strength agent 1~3%,
Air entraining agent 0.01~0.5%,
Polyethers synthesize antifoaming agent 0.05~0.8%,
Brightener 0.4~3.5%,
Viscosity thixotropic agent 0.05~2%,
Surplus is water.
3. shield duct piece additive according to claim 1 or 2, which is characterized in that the poly-carboxylic high-performance diminishing
Agent is ZY-HS water-reducing agents.
4. shield duct piece additive according to claim 3, which is characterized in that the high performance water reducing agent of polyocarboxy acid
Gu containing being 35~45%.
5. shield duct piece additive according to claim 1 or 2, which is characterized in that the early strength agent for triethanolamine,
At least one of diethanol monoisopropanolamine and calcium formate.
6. shield duct piece additive according to claim 1 or 2, which is characterized in that the air entraining agent is polyethers phosphoric acid
At least one of ester and lauryl sodium sulfate.
7. shield duct piece additive according to claim 1 or 2, which is characterized in that the polyethers synthesis antifoaming agent
For bamboo this grease antifoaming agent.
8. shield duct piece additive according to claim 1 or 2, which is characterized in that the brightener is glycerine.
9. shield duct piece additive according to claim 1 or 2, which is characterized in that the viscosity thixotropic agent is talcum
Powder.
10. a kind of preparation method of shield duct piece additive as described in claim 1, which is characterized in that include the following steps：
(1) it determines each group distribution ratio, water is first added in container, sequentially add high performance water reducing agent of polyocarboxy acid, early strength agent, gather
It is mixed evenly after ethers synthesis antifoaming agent, brightener and viscosity thixotropic agent；
(2) it adds in air entraining agent and stirs evenly to get finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711341517.7A CN108147698A (en) | 2017-12-14 | 2017-12-14 | A kind of shield duct piece additive and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711341517.7A CN108147698A (en) | 2017-12-14 | 2017-12-14 | A kind of shield duct piece additive and preparation method |
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| Publication Number | Publication Date |
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| CN108147698A true CN108147698A (en) | 2018-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201711341517.7A Pending CN108147698A (en) | 2017-12-14 | 2017-12-14 | A kind of shield duct piece additive and preparation method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109293276A (en) * | 2018-10-25 | 2019-02-01 | 湖南中岩建材科技有限公司 | A kind of thickening water-retaining type additive and its preparation method and application |
| CN110655346A (en) * | 2019-09-29 | 2020-01-07 | 湖南中岩建材科技有限公司 | Machine-made sand regulator and preparation method thereof |
| WO2024187546A1 (en) * | 2023-03-11 | 2024-09-19 | 石家庄市长安育才建材有限公司 | Admixture for steam-curing-free precast concrete and preparation method therefor |
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| JP2005306633A (en) * | 2004-04-19 | 2005-11-04 | Ishikawajima Constr Materials Co Ltd | Method of producing cement hardened material and segment using the same |
| CN106431063A (en) * | 2016-09-13 | 2017-02-22 | 科之杰新材料集团有限公司 | Coagulation promoting early strength type polycarboxylic acid water reducing agent for metro shield tunnel segments |
| CN107352842A (en) * | 2017-08-31 | 2017-11-17 | 南京瑞迪高新技术有限公司 | A kind of high high-early strength type polycarboxylic acids dehydragent of subway segment concrete |
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2017
- 2017-12-14 CN CN201711341517.7A patent/CN108147698A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005306633A (en) * | 2004-04-19 | 2005-11-04 | Ishikawajima Constr Materials Co Ltd | Method of producing cement hardened material and segment using the same |
| CN106431063A (en) * | 2016-09-13 | 2017-02-22 | 科之杰新材料集团有限公司 | Coagulation promoting early strength type polycarboxylic acid water reducing agent for metro shield tunnel segments |
| CN107352842A (en) * | 2017-08-31 | 2017-11-17 | 南京瑞迪高新技术有限公司 | A kind of high high-early strength type polycarboxylic acids dehydragent of subway segment concrete |
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| 四川省交通运输厅公路规划勘察设计研究院主编: "《桥梁高性能清水混凝土技术规程》", 30 September 2015, 西南交通大学出版社 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109293276A (en) * | 2018-10-25 | 2019-02-01 | 湖南中岩建材科技有限公司 | A kind of thickening water-retaining type additive and its preparation method and application |
| CN110655346A (en) * | 2019-09-29 | 2020-01-07 | 湖南中岩建材科技有限公司 | Machine-made sand regulator and preparation method thereof |
| WO2024187546A1 (en) * | 2023-03-11 | 2024-09-19 | 石家庄市长安育才建材有限公司 | Admixture for steam-curing-free precast concrete and preparation method therefor |
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Application publication date: 20180612 |