CN114702277B - Prestressed duct grouting material and preparation method thereof - Google Patents
Prestressed duct grouting material and preparation method thereof Download PDFInfo
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- CN114702277B CN114702277B CN202210270768.5A CN202210270768A CN114702277B CN 114702277 B CN114702277 B CN 114702277B CN 202210270768 A CN202210270768 A CN 202210270768A CN 114702277 B CN114702277 B CN 114702277B
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- parts
- grouting material
- reducing agent
- water reducing
- cement
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- 239000000463 material Substances 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 37
- 239000002070 nanowire Substances 0.000 claims abstract description 33
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 31
- 238000003756 stirring Methods 0.000 claims abstract description 31
- 239000004568 cement Substances 0.000 claims abstract description 27
- 229920001800 Shellac Polymers 0.000 claims abstract description 26
- ZLGIYFNHBLSMPS-ATJNOEHPSA-N shellac Chemical compound OCCCCCC(O)C(O)CCCCCCCC(O)=O.C1C23[C@H](C(O)=O)CCC2[C@](C)(CO)[C@@H]1C(C(O)=O)=C[C@@H]3O ZLGIYFNHBLSMPS-ATJNOEHPSA-N 0.000 claims abstract description 26
- 229940113147 shellac Drugs 0.000 claims abstract description 26
- 235000013874 shellac Nutrition 0.000 claims abstract description 26
- 239000004208 shellac Substances 0.000 claims abstract description 26
- 239000002966 varnish Substances 0.000 claims abstract description 20
- 239000010881 fly ash Substances 0.000 claims abstract description 17
- 239000000243 solution Substances 0.000 claims abstract description 16
- 239000011259 mixed solution Substances 0.000 claims abstract description 10
- 239000011083 cement mortar Substances 0.000 claims abstract description 6
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 10
- 239000011398 Portland cement Substances 0.000 claims description 8
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 2
- 125000001931 aliphatic group Chemical group 0.000 claims description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 239000002002 slurry Substances 0.000 abstract description 17
- 230000000740 bleeding effect Effects 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract description 3
- 238000005204 segregation Methods 0.000 abstract description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 7
- 239000010703 silicon Substances 0.000 description 7
- 125000001624 naphthyl group Chemical group 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 210000002435 tendon Anatomy 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- 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
Landscapes
- 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 discloses a prestressed duct grouting material which comprises the following components in parts by weight: 50-100 parts of cement, 30-50 parts of fly ash, 10-20 parts of shellac varnish, 15-30 parts of manganese dioxide nanowires, 3-5 parts of water reducing agent and 1-3 parts of defoaming agent; the invention also discloses a preparation method of the prestressed duct grouting material, which comprises the following steps: dissolving shellac varnish flakes in a methanol solution, stirring and dissolving, adding fly ash, and uniformly stirring to obtain a mixed solution; and step two, transferring the mixed solution into a cement mortar stirrer, adding cement, manganese dioxide nanowires, a water reducing agent and a defoaming agent, adding stirring water, and uniformly stirring to obtain a grouting material. The grouting material prepared by the invention has better material stability, cohesiveness and mechanical property, prevents the problems of slurry layering segregation and bleeding or floating slurry, improves the structural strength and volume stability of the slurry, and can prevent the slurry from cracking after hardening.
Description
Technical Field
The invention relates to the technical field of grouting materials, in particular to a prestressed duct grouting material and a preparation method thereof.
Background
In the post-tensioning prestressed duct grouting construction process in China, the prestressed duct grouting material not only plays a role in connecting prestressed tendons and beam body concrete, but also plays a role in protecting the prestressed tendons, the quality of the prestressed duct grouting material does not reach the standard, so that the corrosion of the steel bars is caused, the early loss of the prestressed force is caused, and the service life of the bridge is shortened; in the process of pore channel grouting, floating slurry appears, the strength of the floating slurry is low and the floating slurry is loose, so that the layering phenomenon of the hardened secondary pressure-supplementing slurry is caused; after solidification, the structural strength is not high enough, and after a period of time, the condition of crack can be produced, and the above-mentioned problem not only influences the construction, still can cause some potential safety hazards.
Disclosure of Invention
The invention aims to provide a prestressed duct grouting material and a preparation method thereof, aiming at the defects of the prior art.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
the prestressed duct grouting material comprises the following components in parts by weight: 50-100 parts of cement, 30-50 parts of fly ash, 10-20 parts of shellac varnish, 15-30 parts of manganese dioxide nanowires, 3-5 parts of water reducing agent and 1-3 parts of defoaming agent.
Further, the cement is portland cement.
Furthermore, the manganese dioxide nanowire is prepared by a hydrothermal method, the diameter of the manganese dioxide nanowire is 20-40nm, and the length of the manganese dioxide nanowire is 50-100 microns.
Further, the water reducing agent is one or more of a naphthalene-based high-efficiency water reducing agent, an aliphatic high-efficiency water reducing agent, an amino high-efficiency water reducing agent and a polycarboxylic acid high-performance water reducing agent.
Further, the defoaming agent is an organic silicon defoaming agent.
A preparation method of prestressed duct grouting material comprises the following steps:
dissolving shellac varnish flakes in a methanol solution, stirring and dissolving, adding fly ash, and uniformly stirring to obtain a mixed solution;
and step two, transferring the mixed solution into a cement mortar stirrer, adding cement, manganese dioxide nanowires, a water reducing agent and a defoaming agent, adding stirring water, and uniformly stirring to obtain a grouting material.
Further, the mass ratio of the shellac varnish pieces to the methanol solution is 1: 5-8.
Furthermore, the weight ratio of the water gel in the second step is 0.26-0.28.
Further, in the second step, the stirring speed is 1000-2000r/min, and the stirring time is 5-8 min.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
according to the invention, the shellac paint tablet is added, the main component of the shellac paint tablet is shellac resin, and the shellac resin is mixed with the fly ash after being dissolved, so that the stability and cohesiveness of the slurry can be effectively improved, the problem of slurry delamination and bleeding or floating is prevented, and the structural strength and the volume stability of the slurry are improved; the shellac resin is dissolved by adopting methanol, and the alcoholic solution of the shellac resin has better adhesion and can be adhered to the surface of the reinforcing steel bar to form a paint film so as to prevent the reinforcing steel bar from being corroded;
the fly ash is added to replace most of cement, so that the production cost is reduced;
the manganese dioxide nanowires are added and uniformly mixed in the slurry, and the particles are mutually bridged, so that the structural strength of the material is effectively improved, and the slurry is prevented from cracking after being hardened.
Detailed Description
The following examples further describe embodiments of the present invention in detail. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1
The prestressed duct grouting material comprises the following components in parts by weight: 50 parts of cement, 30 parts of fly ash, 10 parts of shellac varnish, 15 parts of manganese dioxide nanowires, 3 parts of water reducing agent and 1 part of defoaming agent.
Further, the cement is portland cement; the manganese dioxide nanowire is prepared by a hydrothermal method, the diameter of the manganese dioxide nanowire is 20-40nm, and the length of the manganese dioxide nanowire is 50-100 microns; the water reducing agent is a naphthalene-based high-efficiency water reducing agent; the defoaming agent is an organic silicon defoaming agent.
A preparation method of prestressed duct grouting material comprises the following steps:
dissolving shellac varnish flakes in a methanol solution, stirring and dissolving, adding fly ash, and uniformly stirring to obtain a mixed solution;
and step two, transferring the mixed solution into a cement mortar stirrer, adding cement, manganese dioxide nanowires, a water reducing agent and a defoaming agent, adding stirring water, wherein the weight ratio of water to cement is 0.28, the stirring speed is 1500r/min, the stirring time is 8min, and uniformly stirring to obtain a grouting material.
Further, the mass ratio of the shellac varnish pieces to the methanol solution is 1: 5.
Example 2
The prestressed duct grouting material comprises the following components in parts by weight: 65 parts of cement, 40 parts of fly ash, 15 parts of shellac varnish, 20 parts of manganese dioxide nanowires, 4 parts of water reducing agent and 2 parts of defoaming agent.
Further, the cement is portland cement; the manganese dioxide nanowire is prepared by a hydrothermal method, the diameter of the manganese dioxide nanowire is 20-40nm, and the length of the manganese dioxide nanowire is 50-100 microns; the water reducing agent is a naphthalene-based high-efficiency water reducing agent; the defoaming agent is an organic silicon defoaming agent.
The preparation method of the prestressed duct grouting material is the same as that in the embodiment 1, and the mass ratio of the shellac varnish flakes to the methanol solution is 1: 6.
Example 3
The prestressed duct grouting material comprises the following components in parts by weight: 80 parts of cement, 40 parts of fly ash, 15 parts of shellac varnish, 25 parts of manganese dioxide nanowires, 4 parts of water reducing agent and 2 parts of defoaming agent.
Further, the cement is portland cement; the manganese dioxide nanowire is prepared by a hydrothermal method, the diameter of the manganese dioxide nanowire is 20-40nm, and the length of the manganese dioxide nanowire is 50-100 microns; the water reducing agent is a naphthalene-based high-efficiency water reducing agent; the defoaming agent is an organic silicon defoaming agent.
The preparation method of the prestressed duct grouting material is the same as that in the embodiment 1, and the mass ratio of the shellac varnish flakes to the methanol solution is 1: 7.
Example 4
The prestressed duct grouting material comprises the following components in parts by weight: 100 parts of cement, 50 parts of fly ash, 20 parts of shellac varnish, 30 parts of manganese dioxide nanowires, 5 parts of water reducing agent and 3 parts of defoaming agent.
Further, the cement is portland cement; the manganese dioxide nanowire is prepared by a hydrothermal method, the diameter of the manganese dioxide nanowire is 20-40nm, and the length of the manganese dioxide nanowire is 50-100 microns; the water reducing agent is a naphthalene-based high-efficiency water reducing agent; the defoaming agent is an organic silicon defoaming agent.
The preparation method of the prestressed duct grouting material is the same as that in the embodiment 1, and the mass ratio of the shellac varnish flakes to the methanol solution is 1: 8.
Comparative example 1
The prestressed duct grouting material comprises the following components in parts by weight: 80 parts of cement, 40 parts of fly ash, 25 parts of manganese dioxide nanowires, 4 parts of a water reducing agent and 2 parts of a defoaming agent.
Further, the cement is portland cement; the manganese dioxide nanowires are prepared by a hydrothermal method, the diameter of the manganese dioxide nanowires is 20-40nm, and the length of the manganese dioxide nanowires is 50-100 microns; the water reducing agent is a naphthalene-based high-efficiency water reducing agent; the defoaming agent is an organic silicon defoaming agent.
A preparation method of prestressed duct grouting material comprises the following steps:
adding cement, fly ash, manganese dioxide nanowires, a water reducing agent and a defoaming agent into a cement mortar stirrer, adding stirring water, wherein the weight ratio of water to cement is 0.28, the stirring speed is 1500r/min, the stirring time is 8min, and uniformly stirring to obtain the grouting material.
Comparative example 2
The prestressed duct grouting material comprises the following components in parts by weight: 80 parts of cement, 40 parts of fly ash, 15 parts of shellac varnish, 4 parts of water reducing agent and 2 parts of defoaming agent.
Further, the cement is portland cement; the water reducing agent is a naphthalene-based high-efficiency water reducing agent; the defoaming agent is an organic silicon defoaming agent.
A preparation method of prestressed duct grouting material comprises the following steps:
step one, dissolving shellac varnish sheets in a methanol solution, stirring and dissolving, adding fly ash, and stirring uniformly to obtain a mixed solution;
and step two, transferring the mixed solution into a cement mortar stirrer, adding cement, a water reducing agent and a defoaming agent, adding stirring water, wherein the weight ratio of water to cement is 0.28, the stirring speed is 1500r/min, the stirring time is 8min, and uniformly stirring to obtain the grouting material.
Further, the mass ratio of the shellac varnish pieces to the methanol solution is 1: 7.
And (4) performance testing:
the performance of the grouting materials prepared in examples 1 to 4 and comparative examples 1 to 2 was tested according to the technical Specification for construction of bridges and culverts for highways (JTG/T3650-2020) and the grouting for pipelines for post-tensioned prestressed concrete girders for railways (TB/T3192-2008), and the test results are shown in Table 1.
TABLE 1
As can be seen from the performance tests of the examples 1-4 and the comparative examples 1-2, the grouting material prepared by the invention has better material stability, cohesiveness and mechanical property, prevents the problems of slurry delamination and segregation bleeding or slurry floating, improves the structural strength and volume stability of the slurry, and can prevent the slurry from cracking after hardening.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. The prestressed duct grouting material is characterized by comprising the following components in parts by weight: 50-100 parts of cement, 30-50 parts of fly ash, 10-20 parts of shellac varnish, 15-30 parts of manganese dioxide nanowires, 3-5 parts of water reducing agent and 1-3 parts of defoaming agent.
2. The prestressed duct grouting material of claim 1, wherein the cement is portland cement.
3. The prestressed duct grouting of claim 1, wherein the manganese dioxide nanowires are prepared by hydrothermal method, and have a diameter of 20-40nm and a length of 50-100 μm.
4. The prestressed duct grouting material of claim 1, wherein the water reducing agent is one or more of a naphthalene-based high-efficiency water reducing agent, an aliphatic high-efficiency water reducing agent, an amino high-efficiency water reducing agent and a polycarboxylic acid high-performance water reducing agent.
5. The prestressed duct grouting material of claim 1, wherein the defoaming agent is a silicone defoaming agent.
6. The preparation method of the prestressed duct grouting material is characterized by comprising the following steps of:
dissolving shellac varnish flakes in a methanol solution, stirring and dissolving, adding fly ash, and uniformly stirring to obtain a mixed solution;
and step two, transferring the mixed solution into a cement mortar stirrer, adding cement, manganese dioxide nanowires, a water reducing agent and a defoaming agent, adding stirring water, and uniformly stirring to obtain a grouting material.
7. The method for preparing the prestressed duct grouting material according to claim 6, wherein the mass ratio of shellac varnish flakes to methanol solution is 1: 5-8.
8. The method as claimed in claim 6, wherein the weight ratio of the water to the adhesive in the second step is 0.26-0.28.
9. The method for preparing prestressed duct grouting material as claimed in claim 6, wherein the stirring speed in step two is 1000-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210270768.5A CN114702277B (en) | 2022-03-18 | 2022-03-18 | Prestressed duct grouting material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210270768.5A CN114702277B (en) | 2022-03-18 | 2022-03-18 | Prestressed duct grouting material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114702277A CN114702277A (en) | 2022-07-05 |
| CN114702277B true CN114702277B (en) | 2022-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210270768.5A Active CN114702277B (en) | 2022-03-18 | 2022-03-18 | Prestressed duct grouting material and preparation method thereof |
Country Status (1)
| Country | Link |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004210557A (en) * | 2002-12-27 | 2004-07-29 | Taiheiyo Material Kk | Grout composition |
| CN105000847A (en) * | 2015-06-26 | 2015-10-28 | 石家庄市易达恒联路桥材料有限公司 | Anticorrosion and rust resistant type post-tensioned prestressed duct grouting material and preparation method thereof |
| CN108409286A (en) * | 2018-03-14 | 2018-08-17 | 南开大学 | Composite colloid material based on inorganic nanowires and preparation method thereof and 3D printing application |
| CN112321194A (en) * | 2020-11-06 | 2021-02-05 | 星皓(广州)环保设计研究有限公司 | Preparation method of high-temperature-resistant additive for concrete |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2813480A1 (en) * | 2013-06-14 | 2014-12-17 | Construction Research & Technology GmbH | Cement system, comprising accelerator particles coated with cross-linked shellac |
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2022
- 2022-03-18 CN CN202210270768.5A patent/CN114702277B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004210557A (en) * | 2002-12-27 | 2004-07-29 | Taiheiyo Material Kk | Grout composition |
| CN105000847A (en) * | 2015-06-26 | 2015-10-28 | 石家庄市易达恒联路桥材料有限公司 | Anticorrosion and rust resistant type post-tensioned prestressed duct grouting material and preparation method thereof |
| CN108409286A (en) * | 2018-03-14 | 2018-08-17 | 南开大学 | Composite colloid material based on inorganic nanowires and preparation method thereof and 3D printing application |
| CN112321194A (en) * | 2020-11-06 | 2021-02-05 | 星皓(广州)环保设计研究有限公司 | Preparation method of high-temperature-resistant additive for concrete |
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|---|
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