CN104829158B - Gunite concrete viscosity modifier, its preparation method and its application - Google Patents
Gunite concrete viscosity modifier, its preparation method and its application Download PDFInfo
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- CN104829158B CN104829158B CN201510207782.0A CN201510207782A CN104829158B CN 104829158 B CN104829158 B CN 104829158B CN 201510207782 A CN201510207782 A CN 201510207782A CN 104829158 B CN104829158 B CN 104829158B
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Abstract
The invention provides a kind of gunite concrete viscosity modifier, its preparation method and its application.Gunite concrete viscosity modifier of the present invention, is made up of component A and component B, and in terms of mass parts, component A is condensation polymer type water reducer, accounts for 70 ~ 90 parts；Component B includes that low-molecular-weight linear polymer and Linear Polymer polymer, the low-molecular-weight linear polymer account for 3 ~ 6 parts, and the high molecular weight linear polymer accounts for 8 ~ 25 parts.The gunite concrete viscosity modifier on the basis of gunite concrete later strength is not reduced improves a jetting thickness, the rebound degree of gunite concrete is greatly reduced.
Description
Technical field
The present invention relates to a kind of gunite concrete viscosity modifier, its preparation method and its application, belong to outside concrete
Plus agent technical field.
Background technology
Gunite concrete is a kind of material that reinforces for body structure surface, is widely used in underground engineering, mine engineering, side
In slope reinforcing engineering and emergency work.Gunite concrete needs have stronger cohesive force with body structure surface in work progress,
And sufficiently low rebound degree is kept, for this purpose, accelerator is developed being applied in gunite concrete.Accelerator was divided into for two generations, the
Generation accelerator mainly accelerates hydrated cementitious by hydrolyzing generation highly basic, so as to promote concrete rapid condensation to harden, however, the
Generation accelerator alkalescence is high, easily produces corrosivity to workmen's body and damages, while the highly basic that brings into easily causes Plant ecology
Reaction.
Second generation accelerator is non-alkali, mainly makes concrete by forming a large amount of ettringites in cement slurry
Rapid condensation, although solve the problems, such as that first generation accelerator basicity is too high, can be while it also significantly reduces gunite concrete
Later strength.
For the problem that accelerator causes the decline of gunite concrete later strength, an effective solution route is exactly to develop
Novel injection coagulation viscosity modifier, part replace or replace accelerator completely, send out gunite concrete later strength is not affected
On the basis of exhibition, by greatly improving the viscosity of gunite concrete, the purpose of rebound of shotcrete rate is reduced.
Content of the invention
Rebound degree for existing gunite concrete is too high, and the problem that later strength declines, and the present invention provides a kind of
Gunite concrete viscosity modifier, its preparation method and its application, on the basis of gunite concrete later strength is not reduced,
A jetting thickness is improved, the rebound degree of gunite concrete is greatly reduced.
Gunite concrete viscosity modifier of the present invention, is made up of component A and component B, in terms of mass parts,
Component A is condensation polymer type water reducer, accounts for 70 ~ 90 parts；
Described condensation polymer type water reducer is naphthalenesulfonate condensation compound water reducer, sulfonated phenolic condensation product water reducer, rylnthracene sulfonin
Any one or arbitrarily several mixture mixed with arbitrary proportion in salt condensation product water reducer；
Described condensation polymer type water reducer, water-reducing rate are more than 15%；
Component B includes that low-molecular-weight linear polymer and Linear Polymer polymer, the low-molecular-weight linearly gather
Compound accounts for 3 ~ 6 parts, and the high molecular weight linear polymer accounts for 8 ~ 25 parts；
Described low-molecular-weight linear polymer is polyethylene glycol or poly glycol monomethyl ether；The number of described polyethylene glycol
Average molecular weight is 3000 ~ 6000, and the number-average molecular weight of poly glycol monomethyl ether is 3000 ~ 6000；
Described high molecular weight linear polymer is polyethylene glycol oxide, and the number-average molecular weight of described polyethylene glycol oxide is
100,000~700,000.
The preparation method of gunite concrete viscosity modifier of the present invention is as follows：
Step（1）：Component A is prepared, component A is well mixed；
Step（2）：Component B is prepared, by low-molecular-weight linear polymer and high molecular weight linear mixed with polymers is uniformly
Obtain component B.
During the storage of gunite concrete viscosity modifier of the present invention, component A and component B need to separately be stored up
Deposit.
The application process of gunite concrete viscosity modifier of the present invention is as follows：Component A is mixed into concrete glue first
In gel material, component B is added afterwards；Or it is simultaneously introduced component A and component B；The gunite concrete viscosity modifier according to
In 2% ~ 5% incorporation gunite concrete mixture of gunite concrete Binder Materials quality.
Present invention utilizes the collaboration thickening effect between condensation polymer type water reducer and linear polymer.In cement slurry, contracting
Poly- type reduces the alkyl in aromatic group and linear polymer molecules in agent molecule and can produce σ-π hyperconjugations, from
And define supramolecular network structure, through inside cement slurry, substantially increase the viscosity of cement slurry, formation super
Molecular network structure can't change hydrolysis product of cement composition, thus have no negative effect to the development of cement slurry intensity,
The later strength of gunite concrete is not interfered with.
Beneficial effect：
The gunite concrete viscosity modifier of the present invention can reduce the rebound degree of gunite concrete, improve a spray-up
Thickness, to gunite concrete later strength without negative effect；Can make rebound of shotcrete rate≤8%, jetting thickness >=
400mm, compressive strength rate is more than >=100% within 28 days.
Specific embodiment
According to following example items, the present invention can be better understood from.However, those skilled in the art is easier to understand,
Implement described specific material ratio, process conditions and its result and be merely to illustrate the present invention, and should not also without limitation on power
The profit present invention described in detail in requiring.
Each component used in the present invention is commercially produced product, commercially can buy.
Naphthalenesulfonate condensation compound water reducer in following embodiments, sulfonated phenolic condensation product water reducer and anthracene sulfonic acid salt condensation
Thing water reducer is the JM series of products that buys from Jiangsu Subotexin Material Co., Ltd.Polyethylene glycol and polyoxyethylene
Alkene is the PEG series of products that buys from Nanjing Zhong Xu Chemical Co., Ltd.s.Cement, sand and stone are bought from Nanjing little Ye fields
Cement plant.Nano silicon is bought from Haitai Nano Material Co., Ltd., Nanjing.
The such as table 1 below of gunite concrete mixture match ratio described in embodiment 1 ~ 4, cement：South of the River little Ye fields P.O42.5；
Nano silicon：Particle diameter≤200nm；Sand：Modulus of fineness 2.6；Stone：5-15mm rubbles.
1 gunite concrete mixture match ratio of table
Embodiment 1：
A kind of gunite concrete viscosity modifier, component are calculated as with mass parts：
76 parts of naphthalenesulfonate condensation compound water reducer；
3 parts of polyethylene glycol；
21 parts of polyethylene glycol oxide.
The water-reducing rate of wherein naphthalenesulfonate condensation compound water reducer is 20%.
Wherein polyethylene glycol number-average molecular weight is 3500, and polyethylene glycol oxide number-average molecular weight is 400,000.
According to 4.5% incorporation gunite concrete mixture of gunite concrete Binder Materials quality.
Embodiment 2：
A kind of gunite concrete viscosity modifier, component are calculated as with mass parts：
80 parts of sulfonated phenolic condensation product water reducer；
5 parts of poly glycol monomethyl ether；
15 parts of polyethylene glycol oxide.
The water-reducing rate of wherein sulfonated phenolic condensation product water reducer is 18%.
Wherein poly glycol monomethyl ether number-average molecular weight is 5000, and polyethylene glycol oxide number-average molecular weight is 450,000.
According to 3% incorporation gunite concrete mixture of gunite concrete Binder Materials quality.
Embodiment 3：
A kind of gunite concrete viscosity modifier, component are calculated as with mass parts：
82 parts of sulfonated phenolic condensation product water reducer；
6 parts of poly glycol monomethyl ether；
12 parts of polyethylene glycol oxide.
The water-reducing rate of wherein sulfonated phenolic condensation product water reducer is 18%.
Wherein poly glycol monomethyl ether number-average molecular weight is 4000, and polyethylene glycol oxide number-average molecular weight is 500,000.
According to 3.5% incorporation gunite concrete mixture of gunite concrete Binder Materials quality.
Embodiment 4：
A kind of gunite concrete viscosity modifier, component are calculated as with mass parts：
77 parts of anthracene sulfonic acid salt condensation product water reducer；
5 parts of poly glycol monomethyl ether；
18 parts of polyethylene glycol oxide.
The water-reducing rate of wherein anthracene sulfonic acid salt condensation product water reducer is 16%.
Wherein poly glycol monomethyl ether number-average molecular weight is 5500, and polyethylene glycol oxide number-average molecular weight is 650,000.
According to 3.5% incorporation gunite concrete mixture of gunite concrete Binder Materials quality.
1 ~ 4 gained gunite concrete mixture of embodiment, the property indices of its gunite concrete are as shown in table 2 below.
With reference to GB50086-2001《Technical code for shotcrete rock bolts shore》Requirement is tested.
The property indices of 2 embodiment 1 ~ 4 of table
| Sequence number | Rebound degree (%) | Jetting thickness（mm） | 28 days compressive strength rates (%) |
| Embodiment 1 | 7.6 | 450 | 102% |
| Embodiment 2 | 7.3 | 470 | 106% |
| Embodiment 3 | 6.9 | 520 | 105% |
| Embodiment 4 | 6.7 | 550 | 105% |
Jetting thickness of increase can improve the efficiency of construction of gunite concrete, and reduction rebound degree can reduce injection and apply
The waste of man-hour concrete material.Jetting thickness and this two indexs of rebound degree are closely bound up with gunite concrete viscosity.
From experimental result in table 2, the gunite concrete in embodiment 1 ~ 4 is more than in the case of >=100% in 28 days compressive strength rates,
Its rebound degree≤8%, a jetting thickness >=400mm.
Claims (3)
1. a kind of gunite concrete viscosity modifier, it is characterised in that be made up of component A and component B, in terms of mass parts,
Component A is condensation polymer type water reducer, accounts for 70 ~ 90 parts；
Described condensation polymer type water reducer is naphthalenesulfonate condensation compound water reducer, sulfonated phenolic condensation product water reducer, anthracene sulfonic acid salt contracting
Any one or arbitrarily several mixture mixed with arbitrary proportion in compound water reducer；
Described condensation polymer type water reducer, water-reducing rate are more than 15%；
Component B includes low-molecular-weight linear polymer and Linear Polymer polymer, the low-molecular-weight linear polymer
3 ~ 6 parts are accounted for, the high molecular weight linear polymer accounts for 8 ~ 25 parts；
Described low-molecular-weight linear polymer is polyethylene glycol or poly glycol monomethyl ether；The number of described polyethylene glycol is divided equally
Son amount is 3000 ~ 6000, and the number-average molecular weight of poly glycol monomethyl ether is 3000 ~ 6000；
Described high molecular weight linear polymer is polyethylene glycol oxide, and the number-average molecular weight of described polyethylene glycol oxide is 100,
000~700,000.
2. the preparation method of gunite concrete viscosity modifier described in claim 1, it is characterised in that comprise the following steps that：
Step（1）：Component A is prepared, component A is well mixed and is obtained final product component A；
Step（2）：Component B is prepared, low-molecular-weight linear polymer and high molecular weight linear mixed with polymers are uniformly obtained final product institute
State component B；
During the storage of the gunite concrete viscosity modifier, component A and component B need to separately be stored.
3. the application process of gunite concrete viscosity modifier described in claim 1, it is characterised in that comprise the following steps that：First
Component A is mixed in concrete gel material, component B is added afterwards；Or it is simultaneously introduced component A and component B；The injection coagulation
During soil viscosity modifier is according to 2% ~ 5% incorporation gunite concrete mixture of gunite concrete Binder Materials quality.
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| CN106904861A (en) * | 2016-12-17 | 2017-06-30 | 无锡金斯顿新材料科技有限公司 | A kind of viscosity modifier of utilization HMW polycarboxylic acids control concrete water bleeding and its application |
| CN114988752B (en) * | 2022-06-28 | 2023-05-02 | 中国水利水电第七工程局有限公司 | Preparation and application methods of composition for reducing rebound of sprayed concrete |
Citations (7)
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|---|---|---|---|---|
| CN1084836A (en) * | 1992-07-22 | 1994-04-06 | 山道士有限公司 | The gelling composition of good workability |
| CN1146193A (en) * | 1994-02-22 | 1997-03-26 | 花王株式会社 | Hydraulic composition and process for producing the same |
| US5911819A (en) * | 1995-03-16 | 1999-06-15 | Mbt Holding Ag | Cement spraying admixture |
| JP2001181000A (en) * | 1999-12-21 | 2001-07-03 | Denki Kagaku Kogyo Kk | Rebound decreasing agent, cement concrete, method of manufacturing cement concrete and spraying process using them |
| CN1376138A (en) * | 1999-08-26 | 2002-10-23 | 詹姆斯·哈迪研究有限公司 | Extrudable cementatious material |
| JP4484644B2 (en) * | 2004-09-15 | 2010-06-16 | 太平洋マテリアル株式会社 | Spray material and construction method of spray material |
| CN102464466A (en) * | 2010-11-02 | 2012-05-23 | 淮南矿业(集团)有限责任公司 | Shotcrete additive and spraying technology of shotcrete |
-
2015
- 2015-04-28 CN CN201510207782.0A patent/CN104829158B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084836A (en) * | 1992-07-22 | 1994-04-06 | 山道士有限公司 | The gelling composition of good workability |
| CN1146193A (en) * | 1994-02-22 | 1997-03-26 | 花王株式会社 | Hydraulic composition and process for producing the same |
| US5911819A (en) * | 1995-03-16 | 1999-06-15 | Mbt Holding Ag | Cement spraying admixture |
| CN1376138A (en) * | 1999-08-26 | 2002-10-23 | 詹姆斯·哈迪研究有限公司 | Extrudable cementatious material |
| JP2001181000A (en) * | 1999-12-21 | 2001-07-03 | Denki Kagaku Kogyo Kk | Rebound decreasing agent, cement concrete, method of manufacturing cement concrete and spraying process using them |
| JP4484644B2 (en) * | 2004-09-15 | 2010-06-16 | 太平洋マテリアル株式会社 | Spray material and construction method of spray material |
| CN102464466A (en) * | 2010-11-02 | 2012-05-23 | 淮南矿业(集团)有限责任公司 | Shotcrete additive and spraying technology of shotcrete |
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| CN104829158A (en) | 2015-08-12 |
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Effective date of registration: 20180329 Address after: Jiangning District of Nanjing City, Jiangsu province 211103 Li Quan Lu No. 118 Patentee after: Jiangsu Jill Mstar Technology Ltd Address before: Jiangning District of Nanjing City, Jiangsu province 211100 Li Quan Lu No. 118 Patentee before: Jiangsu Subute New Materials Co., Ltd. |
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