CN106830856A - A kind of ungauged regions reinforcing bar sleeve for connection grouting material and preparation method thereof - Google Patents

A kind of ungauged regions reinforcing bar sleeve for connection grouting material and preparation method thereof Download PDF

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Publication number
CN106830856A
CN106830856A CN201710076563.2A CN201710076563A CN106830856A CN 106830856 A CN106830856 A CN 106830856A CN 201710076563 A CN201710076563 A CN 201710076563A CN 106830856 A CN106830856 A CN 106830856A
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CN
China
Prior art keywords
reinforcing bar
cement
bar sleeve
grouting
ungauged regions
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710076563.2A
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Chinese (zh)
Inventor
杨国刚
侯维红
杨进波
吴文选
柯伟席
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WUHAN UJOIN BUILDING MATERIAL TECHNOLOGY Co Ltd
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WUHAN UJOIN BUILDING MATERIAL TECHNOLOGY Co Ltd
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Priority to CN201710076563.2A priority Critical patent/CN106830856A/en
Publication of CN106830856A publication Critical patent/CN106830856A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • C04B28/04Portland cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • C04B28/06Aluminous cements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/162Connectors or means for connecting parts for reinforcements
    • E04C5/163Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
    • E04C5/165Coaxial connection by means of sleeves
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/70Grouts, e.g. injection mixtures for cables for prestressed concrete
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The invention discloses a kind of ungauged regions reinforcing bar sleeve for connection grouting material, including cement 30 ~ 55%, aggregate 35 ~ 55%, swelling agent 1.5 ~ 6%, modified component 0.15 ~ 25%;Also disclose its preparation method, by each component dry mixing it is uniform after, added water by 0.12 ~ 0.16 ratio of water to material, stirred using mortar mixer, so as to ungauged regions reinforcing bar sleeve for connection grouting materials is obtained;There is the grouting material that the present invention is provided raw material to be easy to get, the simple science of preparation method, the advantages of grouting material is stable and reliable for performance.

Description

A kind of ungauged regions reinforcing bar sleeve for connection grouting material and preparation method thereof
Technical field
The invention belongs to building material field, and in particular to a kind of ungauged regions reinforcing bar sleeve for connection grouting material, Yi Jiqi Preparation method.
Background technology
In recent years, cast-type concrete structure construction problem is become increasingly conspicuous, and extensive, noise of such as constructing is disturbed residents, dust is arranged Put, duty cycle is long, building energy consumption is high etc. so that prefabricated assembled concrete structure is gradually popularized in the utilization of China.It is prefabricated The reliability of component node connection is one of key factor of influence precast construction construction quality, currently for the section of prefabricated components Point connection, it is common to use straight screw sleeve connection device.And sleeve grouting material is used as the adhesive in straight screw sleeve connection technique, its matter Amount is to concern the core of prefabricated components connecting portion structural reliability and quality stability.
But, the existing sleeve grouting material quality of in the market is uneven, however it remains early expansion is not high, environment is adapted to The phenomenons such as property poor, production and construction is inconvenient, later strength is not high, later stage volume stability difference.
A kind of whole ungauged regions super-high strength steel muscle sleeve connection grouting material is disclosed in CN103910511A, Disclose a kind of strong grouting material of straight screw sleeve connection ungauged regions superelevation in CN103922660A, both the above material exist with Lower some deficiency:1st, use aluminium sulfate quasi-plastic property swelling agent as early expansion agent, such swelling agent is based on entringite Expansion sources are wanted, early expansion is difficult to realize, slurry early-age plastic shrinkage is insufficient to compensate for;2nd, be formulated in use water-cement ratio as add The control foundation of water, is not easy to engineer applied.
A kind of bar connecting sleeve grouting material and preparation method thereof is disclosed in CN104402363A, wherein by gelling material Based on material, mineral admixture, because dry powder specific surface area is big, easily there is the big phenomenon of fluidity 30min gradual loss, embodiment Go out machine fluidity in test result in 340mm or so, and 30min fluidities have also confirmed this point in 290mm or so.
A kind of grouting material for prefabricated components bar connecting and preparation method thereof, the filling are disclosed in CN104817309A There is following some deficiency in slurry:1st, it is easily influenced by ambient temperature with sulphate aluminium cement as major gelled material;2nd, in being formulated Containing steel fibre, easily made troubles when production stirring is with grouting construction;3rd, using silicone emulsion as defoamer, the breast described in it Change silicon oil foam killer is liquid, is easily made troubles in production with engineer applied;4th, embodiment performance indications testing result In, compression strength is below 85MPa within 28 days, does not meet JG/T408-2013《Bar connecting sleeve grouting material》28 days pressure resistances The technical requirements of degree >=85MPa.
Therefore, research and development one kind possesses microdilatancy, high fluidity, high-strength, easy production and construction, longevity of service, ring The adaptable grouting material for straight screw sleeve connection in border is significant.
The content of the invention
An object of the present invention is according to the deficiencies in the prior art, there is provided a kind of ungauged regions reinforcing bar sleeve for connection is filled Slurry, the grouting material has microdilatancy, go out machine and 30min fluidities are high, early strong, high-strength, easy production and construction, reinforced bar sleeve test specimen The characteristics of anti-pulling and the excellent multiple tension and compression ability of anti-reflective.
The technical solution adopted for the present invention to solve the technical problems is:A kind of ungauged regions reinforcing bar sleeve for connection grouting Material, including following components in percentage by weight
Cement 30 ~ 55%
Aggregate 35 ~ 55%
Swelling agent 1.5 ~ 6%
Modified component 0.15 ~ 25%
Described strength of cement grade is not less than 42.5;Described aggregate is formed for multistage is assembled with quartz sand;Described expansion Agent is composited by early expansion component and middle and later periods expansion component.
A kind of described ungauged regions reinforcing bar sleeve for connection grouting material, its cement is general by 20 ~ 100% percentage by weights The sulphate aluminium cement of cement and 0 ~ 80% percentage by weight is composited.
Further, described general-purpose cement is one or more in portland cement, Portland cement, intensity etc. Level is 52.5.
A kind of described ungauged regions reinforcing bar sleeve for connection grouting material, its aggregate assembles ratio by mass percentage and is:20~ The mesh quartz sand 30 ~ 60% of 40 mesh quartz sand 40 ~ 70%, 40 ~ 70.
A kind of described ungauged regions reinforcing bar sleeve for connection grouting material, its early expansion component accounts for the weight percent of swelling agent It is one or more in azo-compound, nitric acid substituent, sulfuric acid substituent, animal protein foaming agent than being 0.01 ~ 4%.
A kind of described ungauged regions reinforcing bar sleeve for connection grouting material, wherein late expansion group accounts for the weight percent of swelling agent It is one or more in calcium oxide, aluminium sulfate class, magnesia class swelling agent than being 96 ~ 99.99%
A kind of described ungauged regions reinforcing bar sleeve for connection grouting material, its modified component includes the component of following percentage by weight: Flyash 0 ~ 99%, slag powders 0 ~ 97%, silicon ash 0 ~ 97%, microballon powder 0 ~ 97%, powdered whiting 0 ~ 97%, water reducer 0.4 ~ 85%, Defoamer 0.2 ~ 65%, early strength agent 0 ~ 25%, retarder 0 ~ 75%, water-loss reducer 0 ~ 20%.
A kind of described ungauged regions reinforcing bar sleeve for connection grouting material, the grade of flyash is not less than II grade;Slag powders Grade is not less than S95;Specific surface area >=the 20000m2/kg of silicon ash, dioxide-containing silica >=90%;Microballon powder is extracted for flyash Thing, its bulk density >=700kg/m3, dioxide-containing silica >=50%, alundum (Al2O3) content >=20%;Powdered whiting is 200 Mesh, the white powder material of calcium carbonate content >=98%;Water reducer is high-efficiency water-reducing agent of poly-carboxylic acid, water-reducing rate >=25%;Froth breaking Agent is Polyether Modified Polysiloxanes Defoaming Agent;Early strength agent be lithium carbonate, lithium sulfate, lithium fluoride in one kind and more than;Retarder is One kind in boric acid, sodium gluconate, tartaric acid and its esters, citric acid and its esters, phosphate, metaphosphate and more than; Water-loss reducer is cellulose ethers macromolecular compound.
The second object of the present invention is to provide a kind of preparation method of ungauged regions reinforcing bar sleeve for connection grouting material.
The technical solution adopted for the present invention to solve the technical problems is:
The beneficial effects of the invention are as follows:
1, grouting material of the invention can be carried out flexibly to cement proportion, grading of aggregates, swelling agent proportioning, additive species and proportioning Optimization, is meeting JG/T408-2013《Bar connecting sleeve grouting material》On the premise of technical requirements, concrete engineering reality is reached Border requires that adaptability is good.
2, grouting material of the invention using the one kind in azo-compound, sulfonyl hydrazines compound, nitroso compound and Above as early expansion component, magnesia class swelling agent is used as middle and later periods expansion component, it is ensured that grouting material whole process volume is without receipts Contracting so that 3 hours vertical expansion ratios were 0.3 ~ 0.4%, and 28 with 3 hours vertical expansion ratio differences for 0.05 ~ 0.18%, 24 hours Its waterproof maintenance vertical expansion ratio keeps stabilization.
3, grouting material of the invention is made up of scientific and reasonable raw material and aggregate is arranged in pairs or groups, and it is had under spring and summer normal temperature There is longevity of service, go out machine and the characteristics of 30min fluidities are high.When the grouting material ratio of water to material is between 0.12 ~ 0.16, go out machine stream Dynamic degree is 350 ~ 360mm, and 30min fluidities are 330 ~ 340mm.
4, grouting material of the invention by microdilatancy, high fluidity and operable time more long, improve grouting material with The cementitiousness and slurry packing at straight screw sleeve connection device interface, and it is unidirectional finally to realize the biasing of straight screw sleeve connection test specimen Tension and compression, large deformation are repeatedly disconnected reinforcing bar failure modes in tensile and compressive property inspection repeatedly for stretching, centering simple tension, high stress, Show the ability of good anti-pulling and the multiple tension and compression of anti-reflective.
5, grouting preparation method for material of the invention, using the feeding mode of first light rear weight, improves the homogeneous of dry powder and mortar Property, ensure the using effect of dry powder and mortar.
Specific embodiment
The above of the invention is described in further detail with reference to specific embodiment, but this should not be interpreted as Above range of the invention is only limitted to following examples, and every technology realized based on the above of the invention is all belonged to In scope of the invention.
Embodiment one
A kind of ungauged regions reinforcing bar sleeve for connection grouting material, including following components in percentage by weight:Cement 30%, aggregate 42%, Swelling agent 4.3%, modified component 23.7%.Ratio of water to material 0.12.
Wherein, cement is by Portland cement that 90% strength of cement grade is 52.5 and 10% strength of cement grade Sulphate aluminium cement for 42.5 is composited by weight percentage.
Aggregate is composited by weight percentage by 48% 20 ~ 40 mesh sand with 52% 40 ~ 70 mesh sand.
Swelling agent is composited by weight percentage by 1% early expansion agent with 99% magnesia class swelling agent.
Modified component by 83.3% I grade of flyash, 13.9% powdered whiting, 2.1% water reducer, 0.5% froth breaking The retarder of agent, 0.1% early strength agent with 0.1% is composited by weight percentage.
Embodiment two
A kind of ungauged regions reinforcing bar sleeve for connection grouting material, including following components in percentage by weight:Cement 48%, aggregate 45%, Swelling agent 3.1%, modified component 3.9%.Ratio of water to material 0.14.
Wherein, cement is the Portland cement of strength of cement grade 52.5.
Aggregate is composited by weight percentage by 58% 20 ~ 40 mesh sand with 42% 40 ~ 70 mesh sand.
Swelling agent is composited by weight percentage by 1.5% early expansion agent with 98.5% magnesia class swelling agent.
Modified component be combined by weight percentage by 92.4% microballon powder, 6.3% water reducer and 1.3% defoamer and Into.
Embodiment three
A kind of ungauged regions reinforcing bar sleeve for connection grouting material, including following components in percentage by weight:Cement 44%, aggregate 45%, Swelling agent 5%, modified component 6%.Ratio of water to material 0.16.
Wherein, cement is by Portland cement that 25% strength of cement grade is 52.5 and 75% strength of cement grade Sulphate aluminium cement for 42.5 is composited by weight percentage.
Aggregate is composited by weight percentage by 44% 20 ~ 40 mesh sand with 56% 40 ~ 70 mesh sand.
Swelling agent is composited by weight percentage by 1% early expansion agent with 99% magnesia class swelling agent.
Modified component by 85.8% silicon ash, 3.4% water reducer, 1.7% defoamer, 0.5% early strength agent, 8.4% it is slow Solidifying water-loss reducer of the agent with 0.2% is composited by weight percentage.
Example IV
A kind of ungauged regions reinforcing bar sleeve for connection grouting material, including following components in percentage by weight:Cement 50.23%, aggregate 48%, swelling agent 1.6%, modified component 0.17%.Ratio of water to material 0.15.
Wherein, cement is the portland cement of strength of cement grade 52.5.
Aggregate is composited by weight percentage by 65% 20 ~ 40 mesh sand with 35% 40 ~ 70 mesh sand.
Swelling agent is composited by weight percentage by 3% early expansion agent with 97% magnesia class swelling agent.
Modified component is composited by weight percentage by 70.6% water reducer with 29.4% defoamer.
Embodiment five
A kind of ungauged regions reinforcing bar sleeve for connection grouting material, including following components in percentage by weight:Cement 45%, aggregate 45%, Swelling agent 5.5%, modified component 4.5%.Ratio of water to material 0.13.
Wherein, cement is by Portland cement that 93% strength of cement grade is 52.5 and 7% strength of cement grade Sulphate aluminium cement for 42.5 is composited by weight percentage.
Aggregate is composited by weight percentage by 62% 20 ~ 40 mesh sand with 38% 40 ~ 70 mesh sand.
Swelling agent is composited by weight percentage by 0.05% early expansion agent with 99.5% magnesia class swelling agent.
Modified component by 94.3% slag powders, 4% water reducer, 1.1% defoamer, 0.2% early strength agent, 0.2% it is slow Solidifying water-loss reducer of the agent with 0.2% is composited by weight percentage.
By each component dry mixing in one ~ embodiment of embodiment five it is uniform after, added water by corresponding ratio of water to material, stirred using pulper Mixing obtains ungauged regions reinforcing bar sleeve for connection grouting material.
The physical property of grouting material is as shown in the table:
The above-described embodiments merely illustrate the principles and effects of the present invention, and the embodiment that part uses, for ability For the those of ordinary skill in domain, without departing from the concept of the premise of the invention, various modifications and improvements can be made, These belong to protection scope of the present invention.

Claims (10)

1. a kind of ungauged regions reinforcing bar sleeve for connection grouting material, it is characterised in that:Including following components in percentage by weight
Cement 30 ~ 55%
Aggregate 35 ~ 55%
Swelling agent 1.5 ~ 6%
Modified component 0.15 ~ 25%
Described strength of cement grade is not less than 42.5;Described aggregate is formed for multistage is assembled with quartz sand;Described expansion Agent is composited by early expansion component and middle and later periods expansion component.
2. a kind of ungauged regions reinforcing bar sleeve for connection grouting material according to claim 1, it is characterised in that described cement It is composited by the general-purpose cement of 20 ~ 100% percentage by weights and the sulphate aluminium cement of 0 ~ 80% percentage by weight.
3. a kind of ungauged regions reinforcing bar sleeve for connection grouting material according to claim 2, it is characterised in that described is general Cement is one or more in portland cement, Portland cement, and strength grade is 52.5.
4. a kind of ungauged regions reinforcing bar sleeve for connection grouting material according to claim 1, it is characterised in that described aggregate Assembling ratio by mass percentage is:The mesh quartz sand 30 ~ 60% of 20 ~ 40 mesh quartz sand 40 ~ 70%, 40 ~ 70.
5. a kind of ungauged regions reinforcing bar sleeve for connection grouting material according to claim 1, it is characterised in that described early stage Expansion component accounts for the 0.01 ~ 4% of swelling agent, in being azo-compound, nitric acid substituent, sulfuric acid substituent, animal protein foaming agent One or more.
6. a kind of ungauged regions reinforcing bar sleeve for connection grouting material according to claim 5, it is characterised in that after in described Phase expansion group accounts for the 96 ~ 99.99% of swelling agent, is the one kind or many in calcium oxide, aluminium sulfate class, magnesia class swelling agent Kind.
7. a kind of ungauged regions reinforcing bar sleeve for connection grouting material according to claim 1, it is characterised in that described is modified Component includes the component of following percentage by weight:Flyash 0 ~ 99%, slag powders 0 ~ 97%, silicon ash 0 ~ 97%, microballon powder 0 ~ 97%, weight Matter calcium carbonate 0 ~ 97%, water reducer 0.4 ~ 85%, defoamer 0.2 ~ 65%, early strength agent 0 ~ 25%, retarder 0 ~ 75%, water-loss reducer 0 ~ 20%。
8. a kind of ungauged regions reinforcing bar sleeve for connection grouting material according to claim 7, it is characterised in that described fine coal The grade of ash is not less than II grade;The grade of slag powders is not less than S95;Specific surface area >=the 20000m2/kg of silicon ash, silica Content >=90%;Microballon powder is flyash extract, its bulk density >=700kg/m3, dioxide-containing silica >=50%, three oxidations Two aluminium content >=20%;Powdered whiting is 200 mesh, the white powder material of calcium carbonate content >=98%;Water reducer is poly- carboxylic Sour high efficiency water reducing agent, water-reducing rate >=25%;Defoamer is Polyether Modified Polysiloxanes Defoaming Agent;Early strength agent be lithium carbonate, lithium sulfate, One kind in lithium fluoride and more than;Retarder is boric acid, sodium gluconate, tartaric acid and its esters, citric acid and its esters, phosphorus One kind in hydrochlorate, metaphosphate and more than;Water-loss reducer is cellulose ethers macromolecular compound.
9. a kind of a kind of preparation method of ungauged regions reinforcing bar sleeve for connection grouting material as claimed in claim 1, its feature exists In step is:By cement, aggregate, swelling agent and modified component dry mixing it is uniform after, added water by 0.12 ~ 0.16 ratio of water to material, use Mortar mixer is stirred, so as to ungauged regions reinforcing bar sleeve for connection grouting material is obtained.
10. a kind of preparation method of ungauged regions reinforcing bar sleeve for connection grouting material according to claim 9, its feature exists In concretely comprising the following steps:
1)Get the raw materials ready
Prepare each component raw material by following percentage by weight:Cement 30 ~ 55%, aggregate 35 ~ 55%, swelling agent 1.5 ~ 6%, be modified group Divide 0.15 ~ 25%, the percentage by weight sum of each component is 100%;
2)Mix
Swelling agent and modified component in said components raw material is stirred 3 ~ 4 minutes with pony mixer, mixture is obtained, then will The mixture puts into mixer successively with remaining each component by the order of first light rear weight, and timing, stirring 5 are started after closing dog-house ~ 6 minutes, grouting material dry powder is obtained;
3)Prepare
Using scene, added water by 0.12 ~ 0.16 ratio of water to material, 4 ~ 5 minutes prepared non-shrinking steels are stirred using mortar mixer Muscle sleeve for connection grouting material.
CN201710076563.2A 2017-02-13 2017-02-13 A kind of ungauged regions reinforcing bar sleeve for connection grouting material and preparation method thereof Pending CN106830856A (en)

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CN107285718A (en) * 2017-07-07 2017-10-24 浙江德赛堡建筑材料科技有限公司 A kind of lime base is micro- to shrink grouting material group thing and preparation method thereof
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CN107326810A (en) * 2017-08-03 2017-11-07 武汉理工大学 The reserved grout hole connection method of precast assembly bridge pier
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CN107935517B (en) * 2017-12-12 2020-06-26 中国建筑股份有限公司 Rapid hardening sleeve grouting material for steel bar connection and preparation and use methods thereof
CN107935517A (en) * 2017-12-12 2018-04-20 中国建筑股份有限公司 Quick-hardening sleeve grouting material and its preparation and application for bar connecting
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CN108518067B (en) * 2018-03-27 2020-03-27 北京博大新元房地产开发有限公司 Assembled wallboard grouting compensation device and construction method thereof
CN108518067A (en) * 2018-03-27 2018-09-11 北京博大新元房地产开发有限公司 Assembled wallboard grouting compensation device and its construction method
CN108546063A (en) * 2018-04-17 2018-09-18 上海复培新材料技术有限公司 The special dry powder sleeve grouting material of bar connecting and its preparation
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
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
CN108929084A (en) * 2018-08-03 2018-12-04 上海住信住宅工业有限公司 Reinforcing bar sleeve for connection grouting material
CN109293299A (en) * 2018-09-13 2019-02-01 湖北工业大学 Green planting roofing functionally gradient concrete and preparation method thereof
CN109095859A (en) * 2018-09-13 2018-12-28 湖北工业大学 A kind of self-healing anti-cracking waterproof root resistance concrete
CN109665780A (en) * 2019-01-28 2019-04-23 上海恒福科技发展有限公司 A kind of high flowability reinforcing steel bar connecting sleeve tube grouting material and preparation method thereof
CN110128088A (en) * 2019-05-21 2019-08-16 武汉沃尔浦科技有限公司 A kind of high fluidity reinforcing bar sleeve for connection grouting material
CN110668758A (en) * 2019-10-30 2020-01-10 安徽海螺建材设计研究院有限责任公司 Grouting material for connecting reinforcing steel bar sleeve
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