CN114956711A - Post-tensioned prestressed duct grouting material and preparation method thereof - Google Patents
Post-tensioned prestressed duct grouting material and preparation method thereof Download PDFInfo
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- CN114956711A CN114956711A CN202210269602.1A CN202210269602A CN114956711A CN 114956711 A CN114956711 A CN 114956711A CN 202210269602 A CN202210269602 A CN 202210269602A CN 114956711 A CN114956711 A CN 114956711A
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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
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/022—Agglomerated materials, e.g. artificial aggregates agglomerated by an organic binder
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/26—Corrosion of reinforcement resistance
-
- 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
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- 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)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses post-tensioning prestressed duct grouting material which comprises the following components: industrial waste residue, cement, binding particles, a modifier, an expanding agent and a steel bar rust inhibitor. The invention also discloses a preparation method of the post-tensioning prestressed duct grouting material, which comprises the following steps: 1) preparing binding particles; 2) adding the industrial waste residue, the cement and the bonding particles into a dry powder mixer for premixing to obtain a mixed material; 3) and transferring the mixed material into a cement mortar mixer, adding a modifier, an expanding agent, a reinforcing steel bar rust inhibitor and a water reducing agent, and adding stirring water to obtain the grouting material. In the invention, the bonding particles are added, so that the mechanical property, the material stability and the bonding property of the grouting material are improved, and the bonding force with the prestressed reinforcement is enhanced; the industrial waste residue, the cement and the bonding particles have different grain diameters, and the gaps are fully filled in the pore channel grouting process, so that the compactness of the slurry is increased, and the structural strength of the material is improved.
Description
Technical Field
The invention relates to the technical field of grouting materials, in particular to a post-tensioning prestressed duct grouting material and a preparation method thereof.
Background
In the post-tensioned prestressing duct grouting construction process in China, the adopted traditional grouting material is generally a technical approach of cement, an expanding agent and a water reducing agent. The adverse phenomena which are easy to occur when the material is used for grouting are generally shown as follows: 1) poor slurry quality stability, poor fluidity and poor volume stability; 2) the slurry has large bleeding, is easy to separate and layer, is not smooth when being pressed, is easy to block pipes, has low construction speed, and is difficult to form a pore passage in a full state; 3) after hardening, the slurry is not compact, has a plurality of gaps, is not full in pore channels and is not firmly bonded with the prestressed reinforcement; 4) after solidification, the structural strength is not high enough, and after a period of time, cracks can be generated; the problems not only affect the construction, but also cause some potential safety hazards.
Disclosure of Invention
The invention aims to provide a post-tensioned 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 post-tensioned prestressed duct grouting material comprises the following components in parts by weight: 60-80 parts of industrial waste residue, 20-30 parts of cement, 10-20 parts of bonding particles, 5-10 parts of modifier, 3-5 parts of expanding agent, 3-5 parts of reinforcing steel bar rust inhibitor and 1-2 parts of water reducing agent.
Further, the industrial waste residue comprises one or more of steel slag, coal slag, blast furnace slag, glass waste residue and ceramic waste residue.
Further, the inside of the binding particles contains metal oxide particles, the metal oxide particles can be one or more of iron oxide particles, aluminum oxide particles and copper oxide particles, and the metal oxide particles account for 40-50% of the total mass of the binding particles.
Further, the modifier is a silane coupling agent or a titanate coupling agent.
Further, the swelling agent is one or more of UEA swelling agent, AUA swelling agent and HEA swelling agent.
Furthermore, the reinforcing steel bar rust inhibitor is doped with the reinforcing steel bar rust inhibitor.
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.
A preparation method of post-tensioned pre-stressed duct grouting material comprises the following steps:
step 1) preheating metal oxide particles, adding the metal oxide particles into molten PET, uniformly stirring for 2 hours to obtain mixed PET, and extruding and granulating the mixed PET to obtain bonded particles;
step 2) adding the industrial waste residue, the cement and the bonding particles into a dry powder mixer for premixing, and uniformly stirring to obtain a mixed material;
and 3) transferring the mixed material into a cement mortar stirrer, adding a modifier, an expanding agent, a reinforcing steel bar rust inhibitor and a water reducing agent, adding stirring water with the water-cement ratio of 0.28, and continuously stirring for 5-8min to obtain the grouting material.
Further, the industrial waste residue: cement: the ratio of the particle size range of the binding particles is 5-10:1-5: 10-50.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
the industrial waste residues are added into the raw materials, so that most of the cement consumption is replaced, the stockpiling of solid wastes is reduced, and the production cost is reduced;
the invention also adds the adhesive particles which are made of PET resin and adopt modifier silane coupling agent, the special structure of the silane coupling agent can couple organic polymer and inorganic materials such as cement into a whole to form a hyperbranched three-dimensional network structure, the cohesive force and the cohesive force of the grouting material are greatly increased, the mechanical property, the material stability and the cohesiveness of the grouting material are improved to a great extent, and the cohesiveness with the prestressed reinforcement is enhanced; the addition of the binding particles can obviously improve the viscosity of the slurry and prevent the slurry from layering, separating and bleeding; the bonding particles are also wrapped with metal oxide particles, so that the weight of the bonding particles is increased, and the phenomenon of layering of the grouting material is avoided;
the industrial waste residue, the cement and the bonding particles have different grain diameters and are in a certain proportion, gaps can be fully filled in the pore channel grouting process, the compactness of the slurry is improved, the slurry is stable, the precipitation and segregation phenomena cannot occur, the structural strength of the material is improved, and the good volume stability is kept.
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 post-tensioned prestressed duct grouting material comprises the following components in parts by weight: 60 parts of industrial waste residues, 20 parts of cement, 10 parts of bonding particles, 5 parts of a modifier, 3 parts of an expanding agent, 3 parts of a reinforcing steel bar rust inhibitor and 1 part of a water reducing agent.
Further, the industrial waste slag is steel slag; the cement is ordinary portland cement; the modifier is a silane coupling agent; the swelling agent is a UEA swelling agent; the reinforcing steel bar rust inhibitor is an amino alcohol reinforcing steel bar rust inhibitor; the water reducing agent is a polycarboxylic acid high-performance water reducing agent; the inside of the binding particles contains iron oxide particles, and the metal oxide particles account for 45% of the total mass of the binding particles.
A preparation method of post-tensioned pre-stressed duct grouting material comprises the following steps:
step 1) preheating metal oxide particles, adding the metal oxide particles into molten PET, uniformly stirring for 2 hours to obtain mixed PET, and extruding and granulating the mixed PET to obtain bonded particles;
step 2) adding the industrial waste residue, the cement and the bonding particles into a dry powder mixer for premixing, and uniformly stirring to obtain a mixed material;
and 3) transferring the mixed material into a cement mortar stirrer, adding a modifier, an expanding agent, a reinforcing steel bar rust inhibitor and a water reducing agent, adding stirring water with the water-cement ratio of 0.28, and continuously stirring for 5-8min to obtain the grouting material.
Further, the industrial waste residue: cement: the ratio of the particle size range of the binder particles was 5:1: 10.
Example 2
The post-tensioned prestressed duct grouting material comprises the following components in parts by weight: 65 parts of industrial waste residues, 25 parts of cement, 15 parts of bonding particles, 7 parts of a modifier, 4 parts of an expanding agent, 4 parts of a steel bar rust inhibitor and 1.5 parts of a water reducing agent.
Further, the industrial waste slag is steel slag; the cement is ordinary portland cement; the modifier is a silane coupling agent; the swelling agent is a UEA swelling agent; the reinforcing steel bar rust inhibitor is an amino alcohol reinforcing steel bar rust inhibitor; the water reducing agent is a polycarboxylic acid high-performance water reducing agent; the inside of the binding particles contains iron oxide particles, and the metal oxide particles account for 45% of the total mass of the binding particles.
A method for preparing post-tensioned prestressed duct grouting material is the same as that of example 1.
Further, the industrial waste residue: cement: the ratio of the particle size range of the binder particles was 4:1: 20.
Example 3
The post-tensioned prestressed duct grouting material comprises the following components in parts by weight: 70 parts of industrial waste residue, 25 parts of cement, 15 parts of bonding particles, 8 parts of modifier, 4 parts of expanding agent, 4 parts of reinforcing steel bar rust inhibitor and 1.5 parts of water reducing agent.
Further, the industrial waste slag is steel slag; the cement is ordinary portland cement; the modifier is a silane coupling agent; the swelling agent is a UEA swelling agent; the reinforcing steel bar rust inhibitor is an amino alcohol reinforcing steel bar rust inhibitor; the water reducing agent is a polycarboxylic acid high-performance water reducing agent; the inside of the binding particles contains iron oxide particles, and the metal oxide particles account for 45% of the total mass of the binding particles.
A method for preparing post-tensioned prestressed duct grouting material is the same as that of example 1.
Further, the industrial waste residue: cement: the ratio of the particle size range of the binder particles was 3:1: 30.
Example 4
The post-tensioned pre-stressed duct grouting material comprises the following components in parts by weight: 75 parts of industrial waste residue, 25 parts of cement, 15 parts of bonding particles, 9 parts of modifier, 4 parts of expanding agent, 4 parts of reinforcing steel bar rust inhibitor and 1.5 parts of water reducing agent.
Further, the industrial waste slag is steel slag; the cement is ordinary portland cement; the modifier is a silane coupling agent; the swelling agent is a UEA swelling agent; the reinforcing steel bar rust inhibitor is an amino alcohol reinforcing steel bar rust inhibitor; the water reducing agent is a polycarboxylic acid high-performance water reducing agent; the inside of the binding particles contains iron oxide particles, and the metal oxide particles account for 45% of the total mass of the binding particles.
The preparation method of the post-tensioned pre-stressed duct grouting material is the same as the preparation method of the embodiment 1.
Further, the industrial waste residue: cement: the ratio of the particle size range of the binder particles was 2:1: 40.
Example 5
The post-tensioned prestressed duct grouting material comprises the following components in parts by weight: 80 parts of industrial waste residue, 30 parts of cement, 20 parts of bonding particles, 10 parts of modifier, 5 parts of expanding agent, 5 parts of reinforcing steel bar rust inhibitor and 2 parts of water reducing agent.
Further, the industrial waste slag is steel slag; the cement is ordinary portland cement; the modifier is a silane coupling agent; the swelling agent is a UEA swelling agent; the reinforcing steel bar rust inhibitor is an amino alcohol reinforcing steel bar rust inhibitor; the water reducing agent is a polycarboxylic acid high-performance water reducing agent; the inside of the binding particles contains iron oxide particles, and the metal oxide particles account for 45% of the total mass of the binding particles.
A method for preparing post-tensioned prestressed duct grouting material is the same as that of example 1.
Further, the industrial waste residue: cement: the ratio of the particle size range of the binder particles was 1:1: 50.
Comparative example 1
The post-tensioned prestressed duct grouting material comprises the following components in parts by weight: 70 parts of industrial waste residue, 25 parts of cement, 4 parts of an expanding agent, 4 parts of a steel bar corrosion inhibitor and 1.5 parts of a water reducing agent.
Further, the industrial waste residue is steel slag; the cement is ordinary portland cement; the swelling agent is a UEA swelling agent; the reinforcing steel bar rust inhibitor is an amino alcohol reinforcing steel bar rust inhibitor; the water reducing agent is a polycarboxylic acid high-performance water reducing agent;
a preparation method of post-tensioned pre-stressed duct grouting material comprises the following steps:
step 1) adding industrial waste residues and cement into a dry powder mixer for premixing, and uniformly stirring to obtain a mixed material;
and 2) transferring the mixed material into a cement mortar stirrer, adding an expanding agent, a reinforcing steel bar rust inhibitor and a water reducing agent, adding stirring water with the water-to-cement ratio of 0.28, and continuously stirring for 5-8min to obtain the grouting material.
Further, the industrial waste residue: the ratio of the particle size range of the cement is 3: 1.
Comparative example 2
The post-tensioned pre-stressed duct grouting material comprises the following components in parts by weight: 70 parts of industrial waste residue, 25 parts of cement, 15 parts of bonding particles, 8 parts of modifier, 4 parts of expanding agent, 4 parts of reinforcing steel bar rust inhibitor and 1.5 parts of water reducing agent.
Further, the industrial waste slag is steel slag; the cement is ordinary portland cement; the modifier is a silane coupling agent; the swelling agent is a UEA swelling agent; the reinforcing steel bar rust inhibitor is an amino alcohol reinforcing steel bar rust inhibitor; the water reducing agent is a polycarboxylic acid high-performance water reducing agent; the binder particles are PET particles.
A preparation method of post-tensioned pre-stressed duct grouting material comprises the following steps:
step 1) adding industrial waste residues, cement and bonding particles into a dry powder mixer for premixing, and uniformly stirring to obtain a mixed material;
and 2) transferring the mixed material into a cement mortar stirrer, adding a modifier, an expanding agent, a reinforcing steel bar rust inhibitor and a water reducing agent, adding stirring water with the water-cement ratio of 0.28, and continuously stirring for 5-8min to obtain the grouting material.
Further, the industrial waste residue: cement: the ratio of the particle size range of the binder particles was 3:1: 30.
And (3) performance testing:
the performance of the grouting materials prepared in examples 1 to 5 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 detection of the examples 1-5 and the comparative examples 1-2, the grouting material prepared by the formula has good material stability and cohesiveness, prevents the occurrence of the phenomenon of slurry delamination and segregation and bleeding, can fully fill gaps in the process of pore channel grouting, increases the compactness of the slurry, has stable slurry, does not have the phenomenon of precipitation and segregation, improves the structural strength of the material, and keeps good volume stability.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but 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 post-tensioned pre-stressed duct grouting material is characterized by comprising the following components in parts by weight: 60-80 parts of industrial waste residue, 20-30 parts of cement, 10-20 parts of bonding particles, 5-10 parts of modifier, 3-5 parts of expanding agent, 3-5 parts of reinforcing steel bar rust inhibitor and 1-2 parts of water reducing agent.
2. The post-tensioned pre-stressed duct grouting material of claim 1, wherein the industrial slag comprises one or more of steel slag, coal slag, blast furnace slag, glass slag and ceramic slag.
3. The post-tensioned pre-stressed duct grouting material as claimed in claim 1, wherein the bonding particles contain metal oxide particles inside, the metal oxide particles may be one or more of iron oxide particles, aluminum oxide particles and copper oxide particles, and the metal oxide particles account for 40-50% of the total mass of the bonding particles.
4. The post-tensioned pre-stressed duct grouting material as claimed in claim 1, wherein the modifier is a silane coupling agent or a titanate coupling agent.
5. The post-tensioned pre-stressed duct grouting material as claimed in claim 1, wherein the expanding agent is one or more of UEA expanding agent, AUA expanding agent and HEA expanding agent.
6. The post-tensioned pre-stressed duct grouting material as claimed in claim 1, wherein the reinforcement corrosion inhibitor is a steel reinforcement corrosion inhibitor doped.
7. The post-tensioned pre-stressed orifice 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.
8. The preparation method of the post-tensioned pre-stressed duct grouting material is characterized by comprising the following steps of:
step 1) preheating metal oxide particles, adding the metal oxide particles into molten PET, uniformly stirring for 2 hours to obtain mixed PET, and extruding and granulating the mixed PET to obtain bonded particles;
step 2) adding the industrial waste residue, the cement and the bonding particles into a dry powder mixer for premixing, and uniformly stirring to obtain a mixed material;
and 3) transferring the mixed material into a cement mortar stirrer, adding a modifier, an expanding agent, a reinforcing steel bar rust inhibitor and a water reducing agent, adding stirring water with the water-cement ratio of 0.28, and continuously stirring for 5-8min to obtain the grouting material.
9. The method for preparing post-tensioned pre-stressed duct grouting material according to claim 8, wherein the industrial waste slag: cement: the ratio of the particle size range of the binding particles is 5-10:1-5: 10-50.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06293549A (en) * | 1993-04-07 | 1994-10-21 | Denki Kagaku Kogyo Kk | Grout mortar composition |
| CN102584101A (en) * | 2012-01-20 | 2012-07-18 | 南京瑞迪高新技术有限公司 | Special grouting agent for post-tensioned prestressed concrete beams of highway bridges and culverts and preparation method thereof |
| CN103570307A (en) * | 2012-07-25 | 2014-02-12 | 陕西通宇新材料有限公司 | Anticorrosion rust-proof pre-stressed duct grouting material |
| 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 |
| CN105967591A (en) * | 2016-05-05 | 2016-09-28 | 武汉华中科大土木工程检测中心 | High-fluidity duct grouting material suitable for ultra-long pre-stressed ducts, and preparation method thereof |
| CN109928702A (en) * | 2019-04-24 | 2019-06-25 | 贵州省交通规划勘察设计研究院股份有限公司 | A kind of bridge prestress pore channel injecting paste material and preparation method thereof |
-
2022
- 2022-03-18 CN CN202210269602.1A patent/CN114956711B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06293549A (en) * | 1993-04-07 | 1994-10-21 | Denki Kagaku Kogyo Kk | Grout mortar composition |
| CN102584101A (en) * | 2012-01-20 | 2012-07-18 | 南京瑞迪高新技术有限公司 | Special grouting agent for post-tensioned prestressed concrete beams of highway bridges and culverts and preparation method thereof |
| CN103570307A (en) * | 2012-07-25 | 2014-02-12 | 陕西通宇新材料有限公司 | Anticorrosion rust-proof pre-stressed duct grouting material |
| 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 |
| CN105967591A (en) * | 2016-05-05 | 2016-09-28 | 武汉华中科大土木工程检测中心 | High-fluidity duct grouting material suitable for ultra-long pre-stressed ducts, and preparation method thereof |
| CN109928702A (en) * | 2019-04-24 | 2019-06-25 | 贵州省交通规划勘察设计研究院股份有限公司 | A kind of bridge prestress pore channel injecting paste material and preparation method thereof |
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