CN107686300A - Microdilatancy grout material is used in a kind of tunnel-liner filling - Google Patents
Microdilatancy grout material is used in a kind of tunnel-liner filling Download PDFInfo
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- CN107686300A CN107686300A CN201710604324.XA CN201710604324A CN107686300A CN 107686300 A CN107686300 A CN 107686300A CN 201710604324 A CN201710604324 A CN 201710604324A CN 107686300 A CN107686300 A CN 107686300A
- Authority
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- China
- Prior art keywords
- tunnel
- microdilatancy
- grout material
- parts
- liner
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
-
- 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
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)
- Lining And Supports For Tunnels (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a kind of tunnel-liner filling microdilatancy grout material, it is prepared by the component of following ratio of weight and number：35 ~ 50 parts of ordinary cement, 5 ~ 8 parts of microballon, 3 ~ 5 parts of silicon ash, 4 ~ 6 parts of swelling agent, 35 ~ 45 parts of quartz sand, 1 ~ 2 part of water reducer, 0.5 ~ 1.5 part of retarder, 0.1 ~ 0.3 part of water-loss reducer, 0.2 ~ 0.4 part of early strength agent, 0.2 ~ 0.3 part of plastic expansion agent, 0.1 ~ 0.3 part of redispersable latex powder, 0.1 ~ 0.3 part of defoamer.The invention provides a kind of tunnel-liner filling microdilatancy grout material, develop fast, later strength height with good fluidity, with excellent microdilatancy filling capacity, early strength, it is impervious high simultaneously strong with concrete associativity, area's slip casting of coming to nothing is widely used between tunnel-liner and splash guard, solve tunnel vault lining cutting and substantial amounts of cavity be present, the various constructional deficiencies of lining cutting are repaired, improve the overall mechanical properties of lining cutting.
Description
Technical field
The present invention relates to a kind of microdilatancy grout material for being applied to hole area between tunnel-liner and splash guard, belong to building
Field of material technology, suitable for high-speed railway, the constructing tunnel of highway.
Background technology
Lining cutting vault concrete construction, the defects of due to construction technology itself, workmen's quality and construction management are asked
Topic, cause tunnel vault lining cutting substantial amounts of cavity to be present, greatly harm and risk, especially high ferro epoch brought to engineering,
Tunnel-liner disease is more prominent.To improve railway tunnel lining total quality, effectively prevent and treat vault and come to nothing, implement the total engineering of iron
Center《On printing and distributing the notice of railway tunnel secondary lining prevention vault cavity implementation guideline》(［ 2015 ］ No. 199 texts) spirit,
Full-scale construction popularization and application vault band is molded into sizing process.According to《Tunnel-liner vault band is molded into starching technical requirements》In to microdilatancy
The requirement of grout material, injecting paste material are difficult to meet site technology requirement from conventional cement mortar, it is therefore desirable to develop satisfaction
The microdilatancy grout material of site operation.It is distinctly claimed microdilatancy grout material fluidity 380mm ~ 410mm in specification, separating degree-
1.0 ~ 1.0%, 28d compression strength are more than 50MPa, microdilatancy 0.3 ~ 2.0%, and impermeability is more than 1.5MPa, and with lining cutting coagulation
The associativity of soil is strong.The patent document for meeting the corresponding product of this standard criterion is not yet found by retrieving.
The content of the invention
It is an object of the invention to provide a kind of tunnel-liner filling microdilatancy grout material, for filling tunnel vault lining
Cavity is built, it is simple to operate, scene plus water stirring, standing is sufficiently stirred without the bad phenomenons such as bleeding, layering, truncated cone fluidity
380mm ~ 410mm has good service behaviour, chassis grouting under pressure can be achieved, and grout material complies fully with《Tunnel-liner is encircleed
Heading tape is molded into starching technical requirements》In requirement to microdilatancy grout material.
The technical solution adopted by the present invention is：
Microdilatancy grout material is used in a kind of tunnel-liner filling, it is characterised in that grout material is prepared by the component of following ratio of weight and number
Form：
35 ~ 50 parts of ordinary cement,
5 ~ 8 parts of microballon,
3 ~ 5 parts of silicon ash,
4 ~ 6 parts of swelling agent,
35 ~ 45 parts of quartz sand,
1 ~ 2 part of water reducer,
0.5 ~ 1.5 part of retarder,
0.1 ~ 0.3 part of water-loss reducer,
0.2 ~ 0.4 part of early strength agent,
0.2 ~ 0.3 part of plastic expansion agent,
0.1 ~ 0.3 part of redispersable latex powder,
0.1 ~ 0.3 part of defoamer；
The ordinary cement is P.O42.5 Portland cements；
The quartz sand is siliceous quartz sand, by mass percentage for：20 ~ 40 mesh 20%, 40 ~ 70 mesh 50%, 70 ~ 100 mesh 30%；
The silicon ash is SiO2Content is more than 90%, unit weight：1600~1700kg/cm3SILICA FUME, specific surface area >=18m2/ g, it is apparent
160 ~ 190kg/m of density3, 0.1 ~ 0.2 μm of average grain diameter.
Further, the microballon is average grain diameter≤1.2 μm, and chemical composition is：SiO255 ~ 65%, Al2O3 26~
35%, Fe2O31 ~ 5%, CaO 0.2 ~ 0.6%, MgO 1 ~ 2%, Na2O+K2O 0.5 ~ 4.0%, C 0.01 ~ 2%, TiO2 0.5~
2%。
Further, the swelling agent is in calcium sulphoaluminate class swelling agent, oxidation magnesium types swelling agent, lime swelling agent
One or more kinds of mixtures.
Further, the water reducer is polycarboxylic acids powder water reducer.
Further, the retarder is in sodium gluconate, citric acid, urea, borax, calcium nitrate, calgon
One or more of mixtures.
Further, the water-loss reducer is hydroxypropyl methyl cellulose, and viscosity is≤150000Pa .s.
Further, the early strength agent is more than one or both of sodium sulphate, calcium formate, lithium sulfate, lithium carbonate
Mixture.
Further, the plastic expansion agent is iminodiacetonitrile, one kind in azo dimethylformamide, calcium stearate
Or several mixtures above.
Further, the redispersable latex powder is one kind in vinyl acetate-ethylene copolymer, acrylic copolymer
It is or several.
Further, the defoamer is organic silicon defoamer.
The beneficial effects of the invention are as follows：
1st, the present invention is primary raw material by normal silicate ordinary cement, microballon, silicon ash, more grading quartz sands, composite water-reducing agent,
The multiple functions such as swelling agent, early strength agent, retarder additive simultaneously passes through glue sand agitator at ratio of water to material 0.18 ~ 0.20 from traverse
Sequence stirring forms.
2nd, the present invention have it is simple to operate, scene plus water stirring, be sufficiently stirred stand it is bad existing without bleeding, layering etc.
As truncated cone fluidity 380mm ~ 410mm has good service behaviour, and chassis grouting under pressure can be achieved.
3rd, cement expansive material and the compound use of plastic expansion agent in the present invention so that slurry is in plastic stage and hardening
Later stage all has microdilatancy filling capacity.
4th, the addition of various early strength agent, retarder, defoamer causes grout material to have the abundant activity duration in the present invention
And contribute to the lifting of early strength.
5th, the ultra-fine microballon in part and silicon ash are mixed in the present invention and redispersable latex powder improves grout material and lining cutting
The cohesive force of concrete.
6th, the grout material in the present invention is a kind of high-performance microdilatancy injecting paste material, and property index complies fully with《Tunnel serves as a contrast
Vault band is built to be molded into starching technical requirements》In requirement to grout material, tunnel-liner and splash guard are injected into by grouting under pressure pump
Between area of coming to nothing, efficiently solve vault and come to nothing problem.
Embodiment
In order that the advantages of purpose of the present invention and technical scheme, is more clearly understood, below in conjunction with example, to the present invention
It is further elaborated.
Test is entered to the grout material properties in each embodiment with reference to the method in following standard.
GB/T 50448《Cement based grouting material application technology specification》
GB/T 50080《Concrete mixture characteristic test method standard》
GB/T17671《Test method for strength of hydraulic cement mortar（ISO methods）》
GB/T23440-2009《Inorganic leak-stopping material》
Scientific and technological base [2008] 74《The plate-type non-fragment orbit ordinary cement emulsified asphalt slurries of passenger dedicated railway line CRTS II are provisional
Technical conditions》
《Tunnel-liner vault band is molded into starching technical requirements》.
Embodiment 1
50 parts of ordinary cement,
5 parts of microballon,
3 parts of silicon ash,
4 parts of calcium sulphoaluminate class swelling agent,
35 parts of quartz sand,
1 part of water reducer,
0.5 part of sodium gluconate,
0.1 part of water-loss reducer,
0.4 part of sodium sulphate,
0.2 part of plastic expansion agent,
0.3 part of redispersable latex powder,
0.3 part of defoamer.
Embodiment 2
35 parts of ordinary cement,
7 parts of microballon,
5 parts of silicon ash,
5 parts of magnesium types swelling agent is aoxidized,
45 parts of quartz sand,
1 part of water reducer,
0.3 part of borax,
Citric acid 0.2
0.3 part of water-loss reducer,
0.2 part of lithium sulfate,
0.3 part of plastic expansion agent,
0.1 part of redispersable latex powder,
0.1 part of defoamer.
Embodiment 3
40 parts of ordinary cement,
8 parts of microballon,
4 parts of silicon ash,
4 parts of lime swelling agent,
40 parts of quartz sand,
2 parts of water reducer,
0.5 part of sodium gluconate,
0.5 part of calgon
0.3 part of water-loss reducer,
0.2 part of calcium formate,
0.1 part of lithium carbonate
0.2 part of plastic expansion agent,
0.2 part of redispersable latex powder,
0.1 part of defoamer.
Embodiment 4
42 parts of ordinary cement,
8 parts of microballon,
3 parts of silicon ash,
3 parts of calcium sulphoaluminate class swelling agent,
Aoxidize 2 parts of magnesium types swelling agent
38 parts of quartz sand,
1 part of water reducer,
1 part of citric acid,
0.5 part of urea
0.2 part of water-loss reducer,
0.1 part of lithium carbonate,
0.3 part of sodium sulphate
0.3 part of plastic expansion agent,
0.1 part of redispersable latex powder,
0.3 part of defoamer.
Embodiment 5
44 parts of ordinary cement,
5 parts of microballon,
5 parts of silicon ash,
6 parts of lime swelling agent,
35 parts of quartz sand,
2 parts of water reducer,
0.5 part of sodium gluconate,
1 part of borax
0.3 part of water-loss reducer,
0.2 part of early strength agent,
0.2 part of plastic expansion agent,
0.3 part of redispersable latex powder,
0.2 part of defoamer.
The properties test result of grout material in each embodiment is as follows：
From the point of view of item technical indicator, meet《Tunnel-liner vault band is molded into starching technical requirements》In to the index request of grout material.
Grout material fluidity 380mm ~ 410mm, separating degree -1.0 ~ 1.0%, bleeding rate 0%, 28d compression strength are more than 50MPa, microdilatancy
0.3 ~ 2.0%, impermeability is more than 1.5MPa, and strong with the associativity of lining concrete.
Claims (10)
1. microdilatancy grout material is used in a kind of tunnel-liner filling, it is characterised in that grout material by following ratio of weight and number component system
It is standby to form：
35 ~ 50 parts of cement,
5 ~ 8 parts of microballon,
3 ~ 5 parts of silicon ash,
4 ~ 6 parts of swelling agent,
35 ~ 45 parts of quartz sand,
1 ~ 2 part of water reducer,
0.5 ~ 1.5 part of retarder,
0.1 ~ 0.3 part of water-loss reducer,
0.2 ~ 0.4 part of early strength agent,
0.2 ~ 0.3 part of plastic expansion agent,
0.1 ~ 0.3 part of redispersable latex powder,
0.1 ~ 0.3 part of defoamer；
The cement is the Portland cements of P.O 42.5；
The quartz sand is siliceous quartz sand, by mass percentage for：20 ~ 40 mesh 20%, 40 ~ 70 mesh 50%, 70 ~ 100 mesh 30%；
The silicon ash is SiO2Content is more than 90%, 1600 ~ 1700kg/cm of unit weight3SILICA FUME, specific surface area >=18m2/ g, table
See 160 ~ 190kg/m of density3, 0.1 ~ 0.2 μm of average grain diameter.
2. microdilatancy grout material is used in a kind of tunnel-liner filling according to claim 1, it is characterised in that the microballon is
Average grain diameter≤1.2 μm, chemical composition are：SiO255 ~ 65%, Al2O326 ~ 35%, Fe2O31 ~ 5%, CaO 0.2 ~ 0.6%,
MgO 1 ~ 2%, Na2O+K2O 0.5 ~ 4.0%, C 0.01 ~ 2%, TiO2 0.5~2%。
3. microdilatancy grout material is used in a kind of tunnel-liner filling according to claim 1, it is characterised in that the swelling agent
For one or more kinds of mixtures in calcium sulphoaluminate class swelling agent, oxidation magnesium types swelling agent, lime swelling agent.
4. microdilatancy grout material is used in a kind of tunnel-liner filling according to claim 1, it is characterised in that the water reducer
For polycarboxylic acids powder water reducer.
5. microdilatancy grout material is used in a kind of tunnel-liner filling according to claim 1, it is characterised in that the retarder
For one or more of mixtures in sodium gluconate, citric acid, urea, borax, calcium nitrate, calgon.
6. microdilatancy grout material is used in a kind of tunnel-liner filling according to claim 1, it is characterised in that the water-loss reducer
For hydroxypropyl methyl cellulose, viscosity is≤150000Pa .s.
7. microdilatancy grout material is used in a kind of tunnel-liner filling according to claim 1, it is characterised in that the early strength agent
For mixture more than one or both of sodium sulphate, calcium formate, lithium sulfate, lithium carbonate.
8. microdilatancy grout material is used in a kind of tunnel-liner filling according to claim 1, it is characterised in that the modeling
Property swelling agent be iminodiacetonitrile, mixtures more than one or more of in azo dimethylformamide, calcium stearate.
9. microdilatancy grout material is used in a kind of tunnel-liner filling according to claim 1, it is characterised in that described to divide again
It is the one or more in vinyl acetate-ethylene copolymer, acrylic copolymer to dissipate latex powder.
10. microdilatancy grout material is used in a kind of tunnel-liner filling according to claim 1, it is characterised in that the defoaming
Agent is organic silicon defoamer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710604324.XA CN107686300A (en) | 2017-07-24 | 2017-07-24 | Microdilatancy grout material is used in a kind of tunnel-liner filling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710604324.XA CN107686300A (en) | 2017-07-24 | 2017-07-24 | Microdilatancy grout material is used in a kind of tunnel-liner filling |
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| CN107686300A true CN107686300A (en) | 2018-02-13 |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108439905A (en) * | 2018-04-25 | 2018-08-24 | 北京鸿锐嘉科技发展有限公司 | Slip casting binder and its performance parameter detection method |
| CN108558330A (en) * | 2018-05-22 | 2018-09-21 | 武汉源锦建材科技有限公司 | A kind of tunnel-liner vault band mould grouting microdilatancy grout material |
| CN108751825A (en) * | 2018-08-21 | 2018-11-06 | 莱芜钢铁集团有限公司 | Polymer-modified cement mortar and preparation method thereof and application method |
| CN109369122A (en) * | 2018-12-05 | 2019-02-22 | 中广核工程有限公司 | Shield grouting lightweight slurries |
| CN109942218A (en) * | 2019-04-19 | 2019-06-28 | 辽宁科大中驰镁建材科技有限公司 | A kind of modified oxidized magnesium swelling agent and its preparing the application in cement-based material |
| CN110171951A (en) * | 2018-12-31 | 2019-08-27 | 石家庄市易达恒联路桥材料有限公司 | A kind of high-performance microdilatancy slip casting binder |
| CN110627445A (en) * | 2019-10-18 | 2019-12-31 | 中铁隧道局集团有限公司 | High-impermeability cement-based repair material for tunnel engineering and preparation method thereof |
| CN110642570A (en) * | 2019-09-25 | 2020-01-03 | 山东省建筑科学研究院 | Special mortar for pouring miniature pile and preparation method and application thereof |
| CN110776272A (en) * | 2019-12-03 | 2020-02-11 | 中铁二局集团有限公司 | Additive capable of improving construction performance of cement-based grouting material and preparation method thereof |
| CN112647979A (en) * | 2020-12-28 | 2021-04-13 | 中国科学院武汉岩土力学研究所 | Setting-time-controllable ultra-early-strength type micro-expansion grouting material and preparation method and application thereof |
| CN112694303A (en) * | 2019-10-23 | 2021-04-23 | 武汉华轩高新技术有限公司 | Low-temperature early-strength tunnel lining filling material |
| CN113105186A (en) * | 2021-04-13 | 2021-07-13 | 中铁三局集团广东建设工程有限公司 | Micro-expansion grouting binder for tunnel strip mold grouting and grouting method thereof |
| CN114031349A (en) * | 2021-11-30 | 2022-02-11 | 江苏博拓新型建筑材料股份有限公司 | Wind power high-strength grouting material and preparation method thereof |
| CN115432970A (en) * | 2022-09-05 | 2022-12-06 | 中交一公局集团有限公司 | Self-compacting impervious pottery sand mortar |
| CN116003060A (en) * | 2022-12-27 | 2023-04-25 | 浙江金温铁道开发有限公司 | Early-strength permeable crystallization type grouting material for filling lining cavity of operation tunnel and preparation method of grouting body |
| CN116535173A (en) * | 2023-05-10 | 2023-08-04 | 贵阳中建西部建设有限公司 | High-temperature-resistant concrete and preparation method thereof |
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| JP2002362957A (en) * | 2001-06-12 | 2002-12-18 | Mitsubishi Materials Corp | Low dust type non-shrink grouting material |
| CN106946522A (en) * | 2017-03-08 | 2017-07-14 | 北京艺高世纪科技股份有限公司 | A kind of shield synchronization slip casting construction material |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108439905A (en) * | 2018-04-25 | 2018-08-24 | 北京鸿锐嘉科技发展有限公司 | Slip casting binder and its performance parameter detection method |
| CN108558330A (en) * | 2018-05-22 | 2018-09-21 | 武汉源锦建材科技有限公司 | A kind of tunnel-liner vault band mould grouting microdilatancy grout material |
| CN108558330B (en) * | 2018-05-22 | 2021-01-08 | 武汉源锦建材科技有限公司 | Micro-expansion grouting material for grouting with mold at arch crown of tunnel lining |
| CN108751825A (en) * | 2018-08-21 | 2018-11-06 | 莱芜钢铁集团有限公司 | Polymer-modified cement mortar and preparation method thereof and application method |
| CN109369122A (en) * | 2018-12-05 | 2019-02-22 | 中广核工程有限公司 | Shield grouting lightweight slurries |
| CN110171951A (en) * | 2018-12-31 | 2019-08-27 | 石家庄市易达恒联路桥材料有限公司 | A kind of high-performance microdilatancy slip casting binder |
| CN109942218A (en) * | 2019-04-19 | 2019-06-28 | 辽宁科大中驰镁建材科技有限公司 | A kind of modified oxidized magnesium swelling agent and its preparing the application in cement-based material |
| CN110642570A (en) * | 2019-09-25 | 2020-01-03 | 山东省建筑科学研究院 | Special mortar for pouring miniature pile and preparation method and application thereof |
| CN110627445A (en) * | 2019-10-18 | 2019-12-31 | 中铁隧道局集团有限公司 | High-impermeability cement-based repair material for tunnel engineering and preparation method thereof |
| CN110627445B (en) * | 2019-10-18 | 2021-12-24 | 中铁隧道局集团有限公司 | High-impermeability cement-based repair material for tunnel engineering and preparation method thereof |
| CN112694303A (en) * | 2019-10-23 | 2021-04-23 | 武汉华轩高新技术有限公司 | Low-temperature early-strength tunnel lining filling material |
| CN110776272A (en) * | 2019-12-03 | 2020-02-11 | 中铁二局集团有限公司 | Additive capable of improving construction performance of cement-based grouting material and preparation method thereof |
| CN112647979A (en) * | 2020-12-28 | 2021-04-13 | 中国科学院武汉岩土力学研究所 | Setting-time-controllable ultra-early-strength type micro-expansion grouting material and preparation method and application thereof |
| CN113105186A (en) * | 2021-04-13 | 2021-07-13 | 中铁三局集团广东建设工程有限公司 | Micro-expansion grouting binder for tunnel strip mold grouting and grouting method thereof |
| CN114031349A (en) * | 2021-11-30 | 2022-02-11 | 江苏博拓新型建筑材料股份有限公司 | Wind power high-strength grouting material and preparation method thereof |
| CN115432970A (en) * | 2022-09-05 | 2022-12-06 | 中交一公局集团有限公司 | Self-compacting impervious pottery sand mortar |
| CN115432970B (en) * | 2022-09-05 | 2023-10-31 | 中交一公局集团有限公司 | Self-compacting impervious ceramic sand mortar |
| CN116003060A (en) * | 2022-12-27 | 2023-04-25 | 浙江金温铁道开发有限公司 | Early-strength permeable crystallization type grouting material for filling lining cavity of operation tunnel and preparation method of grouting body |
| CN116535173A (en) * | 2023-05-10 | 2023-08-04 | 贵阳中建西部建设有限公司 | High-temperature-resistant concrete and preparation method thereof |
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Application publication date: 20180213 |