CN102260056A - Post-tensioned prestressed porelike grouting agent - Google Patents
Post-tensioned prestressed porelike grouting agent Download PDFInfo
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- CN102260056A CN102260056A CN 201110135373 CN201110135373A CN102260056A CN 102260056 A CN102260056 A CN 102260056A CN 201110135373 CN201110135373 CN 201110135373 CN 201110135373 A CN201110135373 A CN 201110135373A CN 102260056 A CN102260056 A CN 102260056A
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- porelike
- grouting agent
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- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000011149 active material Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 9
- 239000011575 calcium Substances 0.000 claims description 9
- 229910052791 calcium Inorganic materials 0.000 claims description 9
- 239000013530 defoamer Substances 0.000 claims description 8
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 6
- 150000001261 hydroxy acids Chemical class 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 4
- 238000003837 high-temperature calcination Methods 0.000 claims description 4
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 4
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 4
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 4
- 101710194948 Protein phosphatase PhpP Proteins 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 3
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 3
- 150000002790 naphthalenes Chemical class 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 claims description 3
- 235000010234 sodium benzoate Nutrition 0.000 claims description 3
- 239000004299 sodium benzoate Substances 0.000 claims description 3
- 239000001509 sodium citrate Substances 0.000 claims description 3
- 235000019830 sodium polyphosphate Nutrition 0.000 claims description 3
- 239000001433 sodium tartrate Substances 0.000 claims description 3
- 235000011004 sodium tartrates Nutrition 0.000 claims description 3
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 claims description 3
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 claims description 3
- HWGNBUXHKFFFIH-UHFFFAOYSA-I pentasodium;[oxido(phosphonatooxy)phosphoryl] phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O HWGNBUXHKFFFIH-UHFFFAOYSA-I 0.000 claims description 2
- HELHAJAZNSDZJO-OLXYHTOASA-L sodium L-tartrate Chemical compound [Na+].[Na+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O HELHAJAZNSDZJO-OLXYHTOASA-L 0.000 claims description 2
- 229960002167 sodium tartrate Drugs 0.000 claims description 2
- 229940038773 trisodium citrate Drugs 0.000 claims description 2
- 239000004568 cement Substances 0.000 abstract description 13
- 239000003513 alkali Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- 230000008961 swelling Effects 0.000 abstract description 3
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 239000002518 antifoaming agent Substances 0.000 abstract 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical class OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 abstract 1
- 231100000956 nontoxicity Toxicity 0.000 abstract 1
- 230000000979 retarding effect Effects 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 7
- 238000003756 stirring Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 239000004567 concrete Substances 0.000 description 3
- 239000011440 grout Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 235000019263 trisodium citrate Nutrition 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000009430 construction management Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- HELHAJAZNSDZJO-UHFFFAOYSA-L sodium tartrate Chemical class [Na+].[Na+].[O-]C(=O)C(O)C(O)C([O-])=O HELHAJAZNSDZJO-UHFFFAOYSA-L 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000035882 stress Effects 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
- C04B2103/008—Flocking or deflocking agents
- C04B2103/0081—Deflocking agents
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a post-tensioned prestressed porelike grouting agent, which is characterized by being prepared by mixing the following raw materials in part by weight: 5 to 12 parts of high-efficiency water reducer, 1 to 1.2 parts of organic hydroxycarboxylic acid salt, 1 to 2 parts of retarding auxiliary material, 30 to 50 parts of active material, 30 to 50 parts of micro-swell component and 0.1 to 0.3 part of defoaming agent, wherein the active material is superfine alumina or microsilica. The post-tensioned prestressed porelike grouting agent has proper micro-swell and good activity, and can be prepared into a porelike grouting agent of over M50 grade when the post-tensioned prestressed porelike grouting agent is doped with 10 to 15 percent of cement (replacing 10 to 15 mass percent of cement); moreover, the post-tensioned prestressed porelike grouting agent has the advantages of nontoxicity, low alkali, micro-swell (24-hour free swelling rate is 1 percent), plumpness and no shrinkage of grouting (air bags with the diameter of more than 3mm and water with the volume of more than 1ml are absent during pouring), high strength (the compression strength is more than 72MPa and the breaking strength is more than 11MPa after 28 days), high durability (the alkali content is less than 1 percent) and good compatibility with cement.
Description
Technical field
The invention belongs to building material technical field, is a kind of concrete post-stressed hole path pressure grouting agent that is used for specifically.
Background technology
In prestress box beam, prestress wire and hole path pressure grouting station critical role, are the keys that can prestress correctly set up and reach purpose of design.The purpose of prestress hole path pressure grouting: 1) moisture and the gas in the eliminating duct makes grout enrich the space, duct; 2) not corrosion of protection presstressed reinforcing steel; 3) degree of compactness of substantial beam body behind the reserving hole channel thread force muscle stretch-draw anchor in the post-tensioned structure, still has 1/2 ~ 1/3 space, behind the mud jacking, these spaces are tightly enriched by grout, solidify the back and form a closely knit integral body with member, and it is stressed jointly to help integral body; 4) alleviate the ground tackle burden, behind the hole path pressure grouting, slurry will produce huge bond stress to presstressed reinforcing steel, even ground tackle surpasses safe range of stress and loses anchorage effect, bond stress that grout produces is also arranged as defence line, second road, need not to worry the slip of power muscle and the fracture that causes the beam body.
Now a lot of units in charge of construction hole path pressure grouting adopts the method for mixing swelling agent and water reducer in the cement, often occur being not good at causing mud jacking not full because of construction management, or it is poor with the prestress wire bond stress, bleeding, contraction, intensity are lower than bad phenomenon such as design, cause steel strand corrosion fracture, finally cause prestress to disappear, the great quality accident of beam body fracture.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of concrete back-tension prestressed channel mudjacking agent that is used for, and adopts above-mentioned mud jacking agent, and more closely knit after the concrete hardening, intensity is higher.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of back-tension prestressed channel mudjacking agent, its raw material by following weight parts mixes: 0.1～0.3 part of 5 ~ 12 parts of high efficiency water reducing agents, 1 ~ 1.2 part of organic hydroxy-acid's salt, 1 ~ 2 part of slow setting auxiliary material, 30 ~ 50 parts of active materials, 30～50 parts of microdilatancy components and defoamer, described active material is ultra-fine alumina or SILICA FUME.
Preferably, described high efficiency water reducing agent is pulvis high-efficiency water-reducing agent of poly-carboxylic acid, pulvis naphthalene series high-efficiency water-reducing agent or pulvis aliphatic high-efficiency water reducing agent.Described high efficiency water reducing agent can provide higher diminishing, guarantees that the denseness of slurry satisfies the requirement of construction.
Calcium sulphoaluminate that described microdilatancy component is high-temperature calcination and dehydrated gyp-, Tai-Ace S 150, sal epsom and iron powder grinding form; Its specific surface area is greater than 300m
2/ kg; Its parts by weight are: calcium sulphoaluminate 70 ~ 85, dehydrated gyp-10 ~ 15, Tai-Ace S 150 3 ~ 5, sal epsom 1 ~ 3, iron powder 1 ~ 3.Microdilatancy composition of the present invention can guarantee slurry full, do not shrink and to the bonding property of reinforcing bar and the density in duct.
Described organic hydroxy-acid's salt is Sunmorl N 60S, sodium tartrate or Trisodium Citrate.
Described slow setting auxiliary material is Sodium Benzoate, tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 or sodium polyphosphate.Organic hydroxy-acid's salt and slow setting auxiliary material can guarantee that the material that stirs out keeps viscosity and mobile stablizing within a certain period of time.
The early strength of described active material excited cement slurry, the early strength of assurance examination body satisfies the time requirement of construction process, the reduction of erection time, can significantly reduce bleeding in addition, can well fill the aquation space with the hydrated product of cement.
Described defoamer guarantees the density of slurry, reduces the floating foam of eliminating the slurry surface.Described defoamer adopts the commercially available defoamer that is used for cement all can.
The preparation method of above-mentioned back-tension prestressed channel mudjacking agent: take by weighing raw material according to said ratio, stirring gets final product.
The beneficial effect that adopts technique scheme to produce is: the present invention has suitable microdilatancy and good activity, 10～15%(place of cement quality of interior water mixing mud 10 ~ 15%) can prepare the above hole path pressure grouting of M50 level; And have nontoxic, low alkali, microdilatancy (degree of free swelling was 1% in 24 hours), the full nothing of slurry and shrink (not having diameter during perfusion), intensity height (28 days ultimate compression strength greater than 72MPa, folding strength greater than 11MPa), good endurance (alkali content is lower than 1%) greater than the air bag of 3mm and volume water greater than 1mL, good with cement adaptability.
Embodiment
Embodiment 1
Take by weighing raw material according to following weight parts: 0.1 part of 5 parts in commercially available high-efficiency water-reducing agent of poly-carboxylic acid pulvis, 1 part of Sunmorl N 60S, 1 part of Sodium Benzoate, 30 parts of active materials, 30 parts of microdilatancy components and defoamer, stir then, described active material is a ultra-fine alumina.
Calcium sulphoaluminate that described microdilatancy component is high-temperature calcination and dehydrated gyp-, Tai-Ace S 150, sal epsom and iron powder grinding form; Its specific surface area is greater than 300m
2/ kg; Its weight proportion is: calcium sulphoaluminate 70 weight parts, dehydrated gyp-12 weight, Tai-Ace S 150 3 weight parts, sal epsom 3 weight parts, iron powder 1 weight part.
Cement (portland cement replacement weight 10%) and water are mixed in the mud jacking agent that present embodiment is made, and water-cement ratio is 0.31 ~ 0.33, and the preparation mud jacking material that stirs is used for the back-tension prestressed channel mudjacking construction, and its performance sees Table 1.
Embodiment 2
Take by weighing raw material according to following weight parts: 0.2 part of 12 parts in commercially available naphthalene series high-efficiency water-reducing agent pulvis, 1.2 parts of sodium tartrates, 2 parts of tripoly phosphate sodium STPPs, 40 parts of active materials, 40 parts of microdilatancy components and defoamer, stir then, described active material is a SILICA FUME.
Calcium sulphoaluminate that described microdilatancy component is high-temperature calcination and dehydrated gyp-, Tai-Ace S 150, sal epsom and iron powder grinding form; Its specific surface area is greater than 300m
2/ kg; Its weight proportion is: calcium sulphoaluminate 80 weight parts, dehydrated gyp-10 weight, Tai-Ace S 150 5 weight parts, sal epsom 1 weight part, iron powder 2 weight parts.
Cement (portland cement replacement weight 10%) and water are mixed in the mud jacking agent that present embodiment is made, and water-cement ratio is 0.31 ~ 0.33, and the preparation mud jacking material that stirs is used for the back-tension prestressed channel mudjacking construction, and its performance sees Table 1.
Embodiment 3
As different from Example 1: 0.2 part of 12 parts in commercially available aliphatic high-efficiency water reducing agent pulvis, 1.2 parts of Trisodium Citrates, 2 parts of Sodium hexametaphosphate 99s, 40 parts of active materials, 40 parts of microdilatancy components and defoamer.
Described microdilatancy component is: calcium sulphoaluminate 85 weight parts, dehydrated gyp-15 weight, Tai-Ace S 150 4 weight parts, sal epsom 2 weight parts, iron powder 3 weight parts.
Described Sodium hexametaphosphate 99 can also replace with sodium polyphosphate.
Performance test sees Table 1.
Table 1
Claims (4)
1. post-stressed hole path pressure grouting agent, it is characterized in that being mixed by the raw material of following weight parts: 0.1～0.3 part of 1 ~ 1.2 part of 5 ~ 12 parts of high efficiency water reducing agent, organic hydroxy-acid's salt and 1 ~ 2 part of slow setting auxiliary material, 30 ~ 50 parts of active materials, 30～50 parts of microdilatancy components and defoamer, described active material is ultra-fine alumina or SILICA FUME.
2. post-stressed hole path pressure grouting agent according to claim 1 is characterized in that described high efficiency water reducing agent is pulvis high-efficiency water-reducing agent of poly-carboxylic acid, naphthalene series high-efficiency water-reducing agent or aliphatic high-efficiency water reducing agent.
3. post-stressed hole path pressure grouting agent according to claim 1 is characterized in that calcium sulphoaluminate and dehydrated gyp-, Tai-Ace S 150, sal epsom and iron powder grinding that described microdilatancy component is high-temperature calcination form; Its specific surface area is greater than 300m
2/ kg; Its weight proportion is: calcium sulphoaluminate 70 ~ 85 weight parts, dehydrated gyp-10 ~ 15 weight, Tai-Ace S 150 3 ~ 5 weight parts, sal epsom 1 ~ 3 weight part, iron powder 1 ~ 3 weight part.
4. post-stressed hole path pressure grouting agent according to claim 1 is characterized in that described organic hydroxy-acid's salt is Sunmorl N 60S, sodium tartrate or Trisodium Citrate; Described slow setting auxiliary material is Sodium Benzoate, tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 or sodium polyphosphate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110135373 CN102260056B (en) | 2011-05-24 | 2011-05-24 | Post-tensioned prestressed porelike grouting agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110135373 CN102260056B (en) | 2011-05-24 | 2011-05-24 | Post-tensioned prestressed porelike grouting agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102260056A true CN102260056A (en) | 2011-11-30 |
| CN102260056B CN102260056B (en) | 2013-01-16 |
Family
ID=45006928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110135373 Expired - Fee Related CN102260056B (en) | 2011-05-24 | 2011-05-24 | Post-tensioned prestressed porelike grouting agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102260056B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103172296A (en) * | 2011-12-21 | 2013-06-26 | 中冶建筑研究总院有限公司 | Post-tensioned pre-stressed concrete beam pipeline grouting agent |
| CN104631262A (en) * | 2014-12-19 | 2015-05-20 | 大元建业集团股份有限公司 | Construction method for reducing on-site cement cold regenerated mixture base cracks |
| CN105271890A (en) * | 2015-10-23 | 2016-01-27 | 武汉比邻科技发展有限公司 | Pre-stressed duct grouting agent, and preparation and application methods thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101830664A (en) * | 2010-04-14 | 2010-09-15 | 中国科学院武汉岩土力学研究所 | Prestressing anchoring and grouting material additive, as well as preparation method and application thereof |
-
2011
- 2011-05-24 CN CN 201110135373 patent/CN102260056B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101830664A (en) * | 2010-04-14 | 2010-09-15 | 中国科学院武汉岩土力学研究所 | Prestressing anchoring and grouting material additive, as well as preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 《膨胀剂与膨胀混凝土》 20051231 S.Nagataki 等 "膨胀剂(主要是钙矾石系)" 第12-17页 1-4 , 第4期 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103172296A (en) * | 2011-12-21 | 2013-06-26 | 中冶建筑研究总院有限公司 | Post-tensioned pre-stressed concrete beam pipeline grouting agent |
| CN103172296B (en) * | 2011-12-21 | 2014-08-27 | 中冶建筑研究总院有限公司 | Post-tensioned pre-stressed concrete beam pipeline grouting agent |
| CN104631262A (en) * | 2014-12-19 | 2015-05-20 | 大元建业集团股份有限公司 | Construction method for reducing on-site cement cold regenerated mixture base cracks |
| CN104631262B (en) * | 2014-12-19 | 2018-10-02 | 大元建业集团股份有限公司 | A kind of construction method reducing live Cement Cold Regeneration Technology mixture basic crack |
| CN105271890A (en) * | 2015-10-23 | 2016-01-27 | 武汉比邻科技发展有限公司 | Pre-stressed duct grouting agent, and preparation and application methods thereof |
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| CN102260056B (en) | 2013-01-16 |
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