CN102092997B - Prestressed concrete pipe grouting agent - Google Patents
Prestressed concrete pipe grouting agent Download PDFInfo
- Publication number
- CN102092997B CN102092997B CN2010105710846A CN201010571084A CN102092997B CN 102092997 B CN102092997 B CN 102092997B CN 2010105710846 A CN2010105710846 A CN 2010105710846A CN 201010571084 A CN201010571084 A CN 201010571084A CN 102092997 B CN102092997 B CN 102092997B
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- Prior art keywords
- prestressed concrete
- parts
- concrete pipe
- agent
- slurry
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Classifications
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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
- C04B28/04—Portland cements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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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 invention provides a prestressed concrete pipe grouting agent. The grouting agent comprises the following components in parts by weight: 81.3-82.3 parts of cement, 4.0-5.0 parts of silica fume, 0.6-0.7 part of water reducing agent, 11-12 parts of expanding agent, 1.8-2.2 parts of redispersible emulsion powder and the balance of water, wherein the water cement ratio is 0.33-0.35. In the invention, a double-doping system of silica fume and emulsion powder is adopted, thus obviously increasing the strength of the grouting material, obviously cleaning away bleeding, reducing the brittleness coefficient of slurry and increasing the compactness, filling degree and adhesive force of slurry.
Description
Technical field
The present invention relates to prestressed concrete pipe road mud jacking material, relate in particular to a kind of post stressed concrete beam pipe mudjacking agent.
Background technology
Prestressed concrete is that active demand is healed the scars of war after World War II, develops rapidly from West Europe, and the application so far from theory, design, material, technique to engineering all obtains great development.The starting of China's prestressed concrete about late 10 years than West Europe, but development is rapid, number of applications is very large, particularly over nearly two, 30 years, China's Prestressed Concrete Bridges development is very fast, that bridge type, span and construction technology and technical elements all have breakthrough development, the design of many Prestressed Concrete Bridges, operating technique is reached the international leading level.
Yet still having hysteresis trend aspect prestressed construction technology and the material.The material of prestressed concrete structure mud jacking particularly.Control and grouting result detect and relatively lag behind abroad.Only a small amount of parameter of the testing of materials is stipulated, and testing method unifies (such as degree of mobilization) or accurate not to the utmost (such as bleeding rate, rate of expansion) not to the utmost, so that cause quality of materials uneven.
The effect of pumping of prostressed duct agent mainly contains: (1) prevents that the corrosion (2) of prestress steel synnema to providing effective bonding between presstressed reinforcing steel and the concrete, guaranteeing fully stress transmission between the two
In prestressed concrete construction; prestressed strand is heavily stressed lower to corrosion and responsive; in case the corrosion consequence is very serious; owing in air, in the water, contain higher chlorion (cl) sulfate ion (SO4) and other etching mediums; and steel bundle its sealer after stretch-draw has gone to pot; and in blanking, with ground etc. is even contacting in various degree arranged in the lashing process, friction and even abrasion form surface corrosion.
Be the further corrosion of prevention steel bundle and the sufficient stress transmission of assurance, the slurry of pipeline pneumatic mortar (1) must be closely knit, full, wraps up prestressing tendon fully; (2) slurry is alkalescence (there is passivation on steel bundle surface, provide protection); (3) has the intensity, elasticity, expansion (or without shrinking) property, cohesive force etc. of design requirements after the slurry sclerosis.
Based on the effect of mud jacking, to the basic demand of mud jacking material be 1, degree of mobilization is good, each position of plastic film capicitor that can the Original-filling bending.2, without bleeding.3, without shrinking, the slurry of guarantee pipeline pneumatic mortar reaches fullness degree like this.And closely knit, full, wrap up prestressed strand fully.Also unlikely owing to bleeding, contraction produce the space, so the selenodont mud jacking.And the selenodont mud jacking will make prestressed strand lose protective barrier fully at this position.
Yet; in the post-tensioned prestressed concrete technology; when post-tensioned prestressed reinforcement is in non-level inclination position, multi-span case of bending and plumbness; the bleeding of injection material can make the space after its evaporation lose the passivation protection of cement; simultaneously reinforcing bar corrosion under high-stress state very easily develops; this just causes steel bar corrosion position section damaged, and the safe life of prestressed structure and work reliability are on the hazard.
Summary of the invention
The invention provides a kind of prestressed concrete pipe road grouting agent, the defects that exists to overcome prior art.
In order to achieve the above object, the invention provides a kind of prestressed concrete pipe road grouting agent, comprise the component of following weight ratio:
81.3～82.3 parts of cement
4.0～5.0 parts of silicon ashes
0.6～0.7 part of water reducer
11～12 parts of swelling agents
1.8～2.2 parts of latex powder
Water surplus
Wherein water cement ratio is 0.30～0.36, and water cement ratio refers to the mass ratio of water and cement.
Described cement preference silicate cement;
The preferred amorphous soft silica of described silicon ash, wherein active constituent content is 81.3～82.3 parts;
The preferred polycarboxylate dehydragent of described water reducer;
The preferred HEA type of described swelling agent swelling agent;
Described water cement ratio preferred 0.33～0.35.
As further preferred scheme, can also comprise 0.05～0.1 part ether of cellulose in the component.
As preferred scheme further, each component concentration is preferably as follows in the described grouting agent: 4.0～5.0 parts of silicon ashes, and 0.6～0.7 part of water reducer, 11～12 parts of swelling agents, 1.8～2.2 parts of latex powder, wherein water cement ratio is 0.33～0.35.
Each component adopts conventional commercially available prod.
The preparation method of prestressed concrete pipe of the present invention road grouting agent adopts factory's unified metering addition means.
The present invention adopts that silicon ash and latex powder are two mixes system, the unexpected intensity that improves injection material, and can effectively remove bleeding, and reduce the slurry crumbly coefficient, improve slurry degree of compactness, fullness degree, improve the slurry cohesive force.Its mechanism is not fully aware of, may be that silicon ash, the two systems of mixing of polymkeric substance have been improved interface structure and the composition in the slurry, thereby interfacial adhesion and splitting resistance have been improved, be filled in (the relative silicon ash of the cement) space on every side that gathers materials the Ca thick with enrichment in the interface region (OH) because the silicon ash particle is very little
2The crystal reaction forms new calcium silicide hydrate, thereby not only improves gap structure, improves slurry intensity and has also strengthened anti-mixing property.And polymkeric substance mix the flexibility of having improved slurry, polymkeric substance and silicon ash be two to be mixed in the system, silicon ash and polymkeric substance when satisfying degree of mobilization, fullness degree beam workability, the interface structure compactness extent is better than the grout body construction.
In addition, suitable water cement ratio is the not most important condition of bleeding of grouting material.Usually as the cement of slurry main ingredient, its complete aquation required water amount is about 18%, i.e. w/c=0.18.But the contriver finds, adopt the two grouting agents of system of mixing of silicon ash and latex powder, grouting material will guarantee the degree of mobilization that its construction is essential, its water cement ratio w/c need be controlled at 0.30～0.36, w/c≤0.30 degree of mobilization does not reach requirement, and＞0.36 easily generation bleeding, contraction, water cement ratio preferably is controlled between 35～36%.In prescription, add in addition ether of cellulose, can further improve the system degree of mobilization.
Embodiment
The below provides preferred embodiment of the present invention, to describe technical scheme of the present invention in detail.
Table 1 has provided concrete component and the proportioning of embodiment 1～3 and Comparative Examples 1,2.
Table 1
Its degree of mobilization, bleeding rate, fullness degree test-results such as table 2, test specimen mechanical property test result such as table 3.
Degree of mobilization, bleeding rate, fullness degree are pressed the method for TB/T3192-2008 standard and are measured.
Resistance to compression, bending test are pressed the method for GB/T17671-1999 standard and are measured.Measure respectively its 7 days, resistance to compression in 28 days, folding strength.
Cohesion test is pressed the method for SD105 standard and is measured.
Table 2
| Degree of mobilization (s) | Bleeding rate (%) | Fullness degree | |
| Embodiment 1 | 17 | 0 | Qualified |
| Embodiment 2 | 18 | 0 | Qualified |
| Embodiment 3 | 23 | 0 | Qualified |
| Comparative Examples 1 | 18 | 0.3 | Defective |
| Comparative Examples 2 | 15 | 0.1 | Defective |
Table 3
By above-mentioned experimental result as can be known, the present invention adopts that silicon ash and latex powder are two mixes system, can significantly improve the intensity of injection material, and can effectively remove bleeding, reduces the slurry crumbly coefficient, improves the slurry fullness degree, improves the slurry cohesive force.
Claims (5)
1. a prestressed concrete pipe road grouting agent is characterized in that, comprises the component of following weight ratio:
Wherein water cement ratio is 0.33～0.35.
2. prestressed concrete pipe according to claim 1 road grouting agent is characterized in that described cement is silicate cement.
3. prestressed concrete pipe according to claim 1 road grouting agent is characterized in that described water reducer is polycarboxylate dehydragent.
4. prestressed concrete pipe according to claim 1 road grouting agent is characterized in that described swelling agent is HEA type swelling agent.
5. each described prestressed concrete pipe road grouting agent is characterized in that according to claim 1～4, also comprises 0.05～0.1 part ether of cellulose in the component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105710846A CN102092997B (en) | 2010-12-02 | 2010-12-02 | Prestressed concrete pipe grouting agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105710846A CN102092997B (en) | 2010-12-02 | 2010-12-02 | Prestressed concrete pipe grouting agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102092997A CN102092997A (en) | 2011-06-15 |
| CN102092997B true CN102092997B (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105710846A Expired - Fee Related CN102092997B (en) | 2010-12-02 | 2010-12-02 | Prestressed concrete pipe grouting agent |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103224342B (en) * | 2013-04-22 | 2015-09-16 | 交通运输部公路科学研究所 | A kind of repair materials of Identification Beneath Concrete Slabs |
| CN104163606A (en) * | 2014-07-29 | 2014-11-26 | 广西科技大学 | Checkable-plumpness prestressed duct grouting material and manufacture thereof, and method for prestressed duct grouting |
| CN104446259A (en) * | 2014-12-09 | 2015-03-25 | 鞍钢集团矿业公司 | Anchor rod anchoring agent applied to reinforcing underground broken rock body |
| CN104788052B (en) * | 2015-03-19 | 2017-07-25 | 绍兴文理学院 | Surface pore filling material and manufacturing process of structural plane of rock model |
| CN106242396A (en) * | 2016-07-28 | 2016-12-21 | 中国路桥工程有限责任公司 | Concrete pipeline mud-jacking agent and preparation method |
| CN106986609B (en) * | 2017-04-25 | 2019-09-03 | 浙江华鼎市政建设有限公司 | Bridge inherent stress mud-jacking and its construction technology |
| CN108164219A (en) * | 2018-01-17 | 2018-06-15 | 云南森博混凝土外加剂有限公司 | A kind of drop slurry agent applied in ultrahigh-strength self-compacting concrete |
| CN109400089A (en) * | 2018-10-29 | 2019-03-01 | 俞小峰 | A kind of concrete mud jacking agent and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5547504A (en) * | 1993-10-25 | 1996-08-20 | Board Of Trustees Operating Michigan State University | Non-shrink grout composition with gas forming additive |
| CN1559960A (en) * | 2004-02-17 | 2005-01-05 | 江苏博特新材料有限公司 | High performance grouting addition for concrete with post-tensioning binding prestressing force |
| CN101817656A (en) * | 2009-02-26 | 2010-09-01 | 北京东方雨虹防水技术股份有限公司 | Post stressed concrete beam pipe mudjacking agent |
-
2010
- 2010-12-02 CN CN2010105710846A patent/CN102092997B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5547504A (en) * | 1993-10-25 | 1996-08-20 | Board Of Trustees Operating Michigan State University | Non-shrink grout composition with gas forming additive |
| CN1559960A (en) * | 2004-02-17 | 2005-01-05 | 江苏博特新材料有限公司 | High performance grouting addition for concrete with post-tensioning binding prestressing force |
| CN101817656A (en) * | 2009-02-26 | 2010-09-01 | 北京东方雨虹防水技术股份有限公司 | Post stressed concrete beam pipe mudjacking agent |
Non-Patent Citations (1)
| Title |
|---|
| 黄冬等.《预应力混凝土桥梁孔道压浆材料的研制与应用》.《城市道桥与防洪》.2010,(第8期),第159-161页. * |
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| CN102092997A (en) | 2011-06-15 |
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