CN101462861A - Grouting material for post-stressed concrete pore passage and preparation thereof - Google Patents
Grouting material for post-stressed concrete pore passage and preparation thereof Download PDFInfo
- Publication number
- CN101462861A CN101462861A CNA2008102047609A CN200810204760A CN101462861A CN 101462861 A CN101462861 A CN 101462861A CN A2008102047609 A CNA2008102047609 A CN A2008102047609A CN 200810204760 A CN200810204760 A CN 200810204760A CN 101462861 A CN101462861 A CN 101462861A
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- China
- Prior art keywords
- grouting material
- post
- stressed concrete
- pore passage
- concrete pore
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Classifications
-
- 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
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/008—Cement and like inorganic materials added as expanding or shrinkage compensating ingredients in mortar or concrete compositions, the expansion being the result of a recrystallisation
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
-
- 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
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- 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)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of building materials, in particular to a grouting material used in post-stressed concrete apertures and a preparation method thereof. The grouting material used in the post-stressed concrete apertures consists of Portland cement, an expansion agent, aluminum powder, a water reducing agent, a tackifier, polypropylene fiber, wollastonite powder and limestone powder. The grouting material used in the post-stressed concrete apertures has the functions of no shrinkage, high-efficiency water reduction, high fluidity and good groutability; slurry can also be freely filled in various parts of the apertures to achieve self-compaction even for complex structures with irregular part; and the bleeding rate of the grouting material can obviously reduce after the grouting material is poured into the apertures. Meanwhile, moderate microswelling produces by pouring the grouting material at different hydrating and hardening stages so as to compensate the plastic shrinkage and drying shrinkage of a cement system as well as self volume shrinkage of the grouting material and ensure the volume stability of the hardened slurry. The grouting material has the capacity of moderate slow hardening and fluidity maintenance.
Description
Technical field
The present invention relates to building material technical field, be specifically related to grouting material for post-stressed concrete pore passage and preparation method thereof.
Background technology
The post-tensioned prestressed reinforcement concrete technology has obtained application more and more widely in the modern architecture industry, metallic bellows is also generally adopted by people as the concrete pore-forming material of post-tensioned prestressed reinforcement, for the corrosion that prevents presstressed reinforcing steel increases presstressed reinforcing steel and concrete combination simultaneously, code requirement should carry out duct grouting as early as possible after the stretch-draw of post-tensioning prestress with bond muscle finishes, grout should be full, closely knit in the duct.Grout is poured in important link in the prestressed concrete precast beam.The quality and the work-ing life of the correct degree direct influence prestressed concrete of injection material and hole path pressure grouting construction process precast beam.Therefore for guaranteeing the quality and the work-ing life of prestressed concrete precast beam, should there be a cover to meet construction actual grouting and hole path pressure grouting construction process.Post-stressed injection material is the not corrosion of protection deformed bar, the key material that post-tensioned prestressed reinforcement and one-piece construction are linked into an integrated entity.The main effect of post-tensioned prestressing injection material is that the protection reinforcing bar does not expose corrosion and guarantees effectively stress transmission between deformed bar and the concrete member.
At present, the prestressed concrete duct grouting material of domestic application some quality problems occur through regular meeting in practice of construction influences grouting quality.The normal problem that exists has: duct grouting intensity is low, eakiness; The slurry bleeding; Duct grouting final vacuum hole goes out clear water continuously; Duct grouting is not full, and bigger crescent space is arranged at the top, duct, even the muscle of revealing phenomenon etc. is arranged.These phenomenons not only can cause the presstressed reinforcing steel corrosion, and influencing presstressed reinforcing steel and concrete members can not effectively bond, and can cause the presstressed reinforcing steel fracture when serious, make component damage.
Summary of the invention
The object of the present invention is to provide a kind of grouting material for post-stressed concrete pore passage that does not have contraction, no bleeding.
Another object of the present invention is to provide the preparation method of above-mentioned prestressed concrete duct with high-performance non-shrinkage cement base grouting material.
The present invention adopts miniaturization and compositional optimization technology to prepare grouting material for post-stressed concrete pore passage, and this injection material early-age plastic expands, and makes slurry be full of the space, duct; make grouting closely knit; do not interspace, effectively transmit stress and protection reinforcing bar, the middle and later periods shrinkage value is little.Prestressed concrete of the present invention duct can fundamentally solve with high-performance non-shrinkage cement base grouting material influences the grouting of a post-tensioning prestress with bond concrete construction quality difficult problem, guarantee the quality of prestressed concrete engineering, promote the concrete development of bonded prestress.
Technical scheme of the present invention is:
A kind of grouting material for post-stressed concrete pore passage, the weight part proportioning of each component is:
Silicate cement 100
Swelling agent 10-40
Aluminium powder 0-1
Water reducer 0.5-3
Tackifier 0-2
Polypropylene fibre 0-0.6
Silicon ash 1-20
Limestone powder 10-100
The preferable weight part proportioning of each component is:
Silicate cement 100
Swelling agent 15-20
Aluminium powder 0-1
Water reducer 0.5-3
Tackifier 0-0.6
Polypropylene fibre 0.3-0.6
Silicon ash 5-10
Limestone powder 40-100
Preferably, described cement is silicate cement or ordinary Portland cement, and its intensity is not less than 42.5 strength grades;
Preferably, described swelling agent is sulphoaluminate expander or unslaked lime swelling agent, preferred unslaked lime swelling agent.
Preferably, described aluminium powder is the gas concrete whipping agent.
Preferably, described water reducer is sulfamate water reducer pulvis or methyl naphthalene sulfonic acid sodium powdery water reducer.
Preferably, described tackifier are welan gum or cellulose-based tackifier, comprise hydroxyethylmethyl-cellulose ether, hydroxypropyl methyl cellulose ether, and its range of viscosities is 2.5 ten thousand～40,000, preferred welan gum.
Preferably, described silicon ash is condensed state silicon ash or ordinary silicon ash, specific surface area 〉=19000m
2/ kg.
Preferably, described limestone powder is a water-ground limestone, fineness≤100 orders.
Grouting material for post-stressed concrete pore passage of the present invention can be used for back concrete workses such as bridge, water conservancy, water power, road, underground, basis, also can be used for engineering and repairs with reinforcing and use the high-performance cement base grouting material.
Preparation method of the present invention is: select all kinds of starting material up to specification, silicate cement, swelling agent, aluminium powder, water reducer, tackifier, silicon ash and limestone powder component that weighing according to the above ratio is required, fully stir about added polypropylene fibre and continues to be stirred to evenly after 3 minutes in stirrer.
Among the present invention, the effect of swelling agent is the hydration process that participates in cement, produces a certain amount of swelling property hydrated product, in the process that concrete strength increases, makes concrete produce certain volumetric expansion, and compensating concrete is because the contraction that dry dehydration caused.The adding of water reducer is the plasticizing diminishing, and concrete is reached under the desired mobile situation, and water cement ratio reduces, thereby reduces porosity, reduces hardenite and shrinks.The adding of polypropylene fibre can improve the ability of the early stage anti-plastic shrinkage cracking of concrete, and the cracking resistance effect is split in the resistance that has strengthened maturing.
Beneficial effect of the present invention:
1, grouting material for post-stressed concrete pore passage of the present invention has efficient diminishing, enhanced function, the flow cone time of mixing a certain amount of injection material was at 14～25 seconds, have high workability and good concrete castability, even have the complex construction of special-shaped part, slurry also can freely be filled each position in duct and be reached self-compacting.
2, grouting material for post-stressed concrete pore passage of the present invention can significantly reduce the bleeding rate of grouting material after mixing, owing to adopted functional organic polymer material, under the prerequisite that keeps the slurry high workability, suitably improved the viscosity of system, thereby effectively avoided settlement separate, stop water migration to cause the grouting defective to slurry top, the bleeding rate of injection material is close to zero.
3, grouting material for post-stressed concrete pore passage of the present invention produces the microdilatancy of appropriateness in the different steps of hydration and hardening, plastic shrinkage, dry shrinkage and own vol with the compensation cement system shrink, and have guaranteed the volume stability after slurry hardens.
4, grouting material for post-stressed concrete pore passage of the present invention has appropriate slow setting and keeps mobile ability.Compare with injection material with existing prestressed concrete duct; product of the present invention has high workability, no bleeding in the plastic stage, do not have segregation under pressure, the sclerosis back do not have contraction, intensity height, long durability good especially, reinforcing bar is had long-term provide protection.
Embodiment
Concrete pre-stress duct grouting material is made up of silicate cement, swelling agent, aluminium powder, water reducer, tackifier, silicon ash, polypropylene fibre, limestone powder etc.According to the environment of applications condition,, can obtain needed performance by adjusting the prescription of invention.
Embodiment 1
Silicate cement 100
Sulphoaluminate expander 15
Aluminium powder 0
Sulfamate water reducer 0.5
Welan gum tackifier 0.3
Polypropylene fibre 0.3
Silicon ash 5
Limestone powder 100
The injection material of said ratio preparation, when being 0.4 use by water cement ratio, the injection material fluidity of slurry of preparation is big, bleeding rate is 0.5%, and the 3d degree of free swelling is that 1.2%, 28 day ultimate compression strength is greater than 55MPa.Injection material has high workability, slurry stability and fillibility.
Embodiment 2
Silicate cement 100
Unslaked lime swelling agent 10
Aluminium powder 1
Sulfamate water reducer 0.7
Welan gum tackifier 0.5
Polypropylene fibre 0.6
Silicon ash 10
Limestone powder 50
The injection material of said ratio preparation, when being 0.38 use by water cement ratio, the injection material fluidity of slurry of preparation is big, bleeding rate is 0%, and the 3d degree of free swelling is that 1.5%, 28 day ultimate compression strength is greater than 60MPa.Injection material has high workability, slurry stability and fillibility.
Embodiment 3
Silicate cement 100
Sulphoaluminate expander 20
Aluminium powder 1
Methyl naphthalene sulfonic acid sodium water reducer 0.5
Ether of cellulose tackifier 0.6
Polypropylene fibre 0
Silicon ash 5
Limestone powder 100
The injection material of said ratio preparation, when being 0.4 use by water cement ratio, the injection material fluidity of slurry of preparation is big, bleeding rate is 0%, and the 3d degree of free swelling is that 1.7%, 28 day ultimate compression strength is greater than 50MPa.
Embodiment 4
Silicate cement 100
Sulphoaluminate expander 40
Aluminium powder 0
Sulfamate water reducer 3
Welan gum tackifier 0.1
Polypropylene fibre 0
Silicon ash 1
Limestone powder 100
The injection material of said ratio preparation, when being 0.4 use by water cement ratio, the injection material fluidity of slurry of preparation is big, bleeding rate is 0%, and the 3d degree of free swelling is that 3.7%, 28 day ultimate compression strength is greater than 60MPa.
Embodiment 5
Silicate cement 100
Sulphoaluminate expander 10
Aluminium powder 0
Sulfamate water reducer 1
Welan gum tackifier 2
Polypropylene fibre 0.1
Silicon ash 1
Limestone powder 10
The injection material of said ratio preparation, when being 0.4 use by water cement ratio, the injection material fluidity of slurry of preparation is big, bleeding rate is 0%, and the 3d degree of free swelling is that 0.5%, 28 day ultimate compression strength is greater than 40MPa.
Embodiment 6
Silicate cement 100
Sulphoaluminate expander 20
Aluminium powder 0.2
Methyl naphthalene sulfonic acid sodium water reducer 0.8
Welan gum tackifier 0.4
Polypropylene fibre 0.4
Silicon ash 20
Limestone powder 70
The injection material of said ratio preparation, when being 0.4 use by water cement ratio, the injection material fluidity of slurry of preparation is big, bleeding rate is 0%, and the 3d degree of free swelling is that 2.0%, 28 day ultimate compression strength is greater than 45MPa.
Claims (10)
1. grouting material for post-stressed concrete pore passage, the weight part proportioning of each component is:
Silicate cement 100
Swelling agent 10-40
Aluminium powder 0-1
Water reducer 0.5-3
Tackifier 0-2
Polypropylene fibre 0-0.6
Silicon ash 1-20
Limestone powder 10-100.
2, grouting material for post-stressed concrete pore passage according to claim 1 is characterized in that the weight part proportioning of each component is:
Silicate cement 100
Swelling agent 15-20
Aluminium powder 0-1
Water reducer 0.5-3
Tackifier 0-0.6
Polypropylene fibre 0.3-0.6
Silicon ash 5-10
Limestone powder 40-100.
3, grouting material for post-stressed concrete pore passage according to claim 1 is characterized in that: the intensity of described silicate cement is not less than 42.5 strength grades.
4, grouting material for post-stressed concrete pore passage according to claim 1 is characterized in that: described swelling agent is sulphoaluminate expander or unslaked lime swelling agent.
5, grouting material for post-stressed concrete pore passage according to claim 1 is characterized in that: described water reducer is sulfamate water reducer pulvis or methyl naphthalene sulfonic acid sodium powdery water reducer.
6, grouting material for post-stressed concrete pore passage according to claim 1 is characterized in that: described tackifier are welan gum or cellulose-based tackifier.
7, grouting material for post-stressed concrete pore passage according to claim 6 is characterized in that: described cellulose-based tackifier are hydroxyethylmethyl-cellulose ether or hydroxypropyl methyl cellulose ether, and its range of viscosities is 2.5 ten thousand～40,000.
8, grouting material for post-stressed concrete pore passage according to claim 1 is characterized in that: described silicon ash is condensed state silicon ash or ordinary silicon ash, specific surface area 〉=19000m
2/ kg.
9, grouting material for post-stressed concrete pore passage according to claim 1 is characterized in that: described limestone powder is a water-ground limestone, and fineness is≤100 orders.
10, according to the preparation method of the described grouting material for post-stressed concrete pore passage of arbitrary claim among the claim 1-9, this method is: weighing silicate cement, swelling agent, aluminium powder, water reducer, tackifier, silicon ash and limestone powder component in proportion, in stirrer, stir, add polypropylene fibre and continue to stir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102047609A CN101462861A (en) | 2008-12-17 | 2008-12-17 | Grouting material for post-stressed concrete pore passage and preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102047609A CN101462861A (en) | 2008-12-17 | 2008-12-17 | Grouting material for post-stressed concrete pore passage and preparation thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101462861A true CN101462861A (en) | 2009-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102047609A Pending CN101462861A (en) | 2008-12-17 | 2008-12-17 | Grouting material for post-stressed concrete pore passage and preparation thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531478A (en) * | 2011-12-20 | 2012-07-04 | 上海宝冶工程技术有限公司 | Post-tensioned pre-stressing pipeline grouting material |
| RU2460708C1 (en) * | 2011-03-30 | 2012-09-10 | Государственное образовательное учреждение высшего профессионального образования "Тверской государственный технический университет" | Composition of raw mix to manufacture nonautoclave-hardening aerated concrete |
| CN103739255A (en) * | 2014-01-09 | 2014-04-23 | 江苏苏博特新材料股份有限公司 | High-thixotropy cement-based grouting material |
| CN110156402A (en) * | 2019-06-04 | 2019-08-23 | 江南大学 | A kind of cement base new-old concrete interfacial adhesion strengthening material and preparation method |
| CN110282913A (en) * | 2019-04-10 | 2019-09-27 | 武汉理工大学 | A kind of grouting material and its application in the construction of light internal wall assembled plate |
| CN110304855A (en) * | 2019-07-03 | 2019-10-08 | 湖南兆健建材有限公司 | A kind of bridge duct grouting agent or grouting material |
| RU2719804C1 (en) * | 2019-03-20 | 2020-04-23 | Федеральное государственное автономное образовательное учреждение высшего образования "Крымский федеральный университет имени В.И. Вернадского" | Crude mixture for production of non-autoclave foam concrete |
| CN113620678A (en) * | 2021-09-23 | 2021-11-09 | 重庆三圣实业股份有限公司 | Grouting material and preparation method thereof |
| CN113735523A (en) * | 2021-09-23 | 2021-12-03 | 重庆三圣实业股份有限公司 | Grouting material and preparation method thereof |
| CN114804762A (en) * | 2022-04-12 | 2022-07-29 | 湖北福嘉利建材科技有限公司 | Novel prestressed duct grouting material and preparation method thereof |
-
2008
- 2008-12-17 CN CNA2008102047609A patent/CN101462861A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2460708C1 (en) * | 2011-03-30 | 2012-09-10 | Государственное образовательное учреждение высшего профессионального образования "Тверской государственный технический университет" | Composition of raw mix to manufacture nonautoclave-hardening aerated concrete |
| CN102531478A (en) * | 2011-12-20 | 2012-07-04 | 上海宝冶工程技术有限公司 | Post-tensioned pre-stressing pipeline grouting material |
| CN103739255A (en) * | 2014-01-09 | 2014-04-23 | 江苏苏博特新材料股份有限公司 | High-thixotropy cement-based grouting material |
| CN103739255B (en) * | 2014-01-09 | 2015-10-07 | 江苏苏博特新材料股份有限公司 | A kind of high thixotropic cement-based grouting material |
| RU2719804C1 (en) * | 2019-03-20 | 2020-04-23 | Федеральное государственное автономное образовательное учреждение высшего образования "Крымский федеральный университет имени В.И. Вернадского" | Crude mixture for production of non-autoclave foam concrete |
| CN110282913A (en) * | 2019-04-10 | 2019-09-27 | 武汉理工大学 | A kind of grouting material and its application in the construction of light internal wall assembled plate |
| CN110156402A (en) * | 2019-06-04 | 2019-08-23 | 江南大学 | A kind of cement base new-old concrete interfacial adhesion strengthening material and preparation method |
| CN110304855A (en) * | 2019-07-03 | 2019-10-08 | 湖南兆健建材有限公司 | A kind of bridge duct grouting agent or grouting material |
| CN113620678A (en) * | 2021-09-23 | 2021-11-09 | 重庆三圣实业股份有限公司 | Grouting material and preparation method thereof |
| CN113735523A (en) * | 2021-09-23 | 2021-12-03 | 重庆三圣实业股份有限公司 | Grouting material and preparation method thereof |
| CN114804762A (en) * | 2022-04-12 | 2022-07-29 | 湖北福嘉利建材科技有限公司 | Novel prestressed duct grouting material and preparation method thereof |
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Application publication date: 20090624 |