CN115504735A - Cement-based grouting material for steel bar sleeve - Google Patents
Cement-based grouting material for steel bar sleeve Download PDFInfo
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- CN115504735A CN115504735A CN202211106609.8A CN202211106609A CN115504735A CN 115504735 A CN115504735 A CN 115504735A CN 202211106609 A CN202211106609 A CN 202211106609A CN 115504735 A CN115504735 A CN 115504735A
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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
-
- 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
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
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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
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/146—Silica fume
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
-
- 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)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a cement-based grouting material for a steel bar sleeve, which specifically comprises the following raw materials: the artificial sand comprises cement, water, a water reducing agent, silica fume, fly ash, an expanding agent and a blending material, wherein the cement is ordinary portland cement, the water is tap water, the particle size distribution of the artificial sand is 1.25mm to 2.36mm, the particle size distribution of the silica fume is 0.1-0.15um, the particle size distribution of the fly ash is 80-10um, and the fly ash is secondary fly ash; the preparation method of the cement-based grouting material comprises the following steps: s1: selecting and optimizing the grain composition of the cement-based high-performance reinforced sleeve grouting material; the cement-based grouting material for the steel bar sleeve provided by the invention has the advantages that the grouting material meeting the industrial requirements can be obtained by repeatedly researching and obtaining that the amount of the water reducing agent accounts for 1-1.5% of the total material amount; the less the silica fume mixing amount is, the greater the cement mixing amount is, the better the technical effect of improving the fluidity of the grouting material is.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a cement-based grouting material for a steel bar sleeve.
Background
The cement-based grouting material for the steel bar sleeve is a construction mode for pushing assembly type building construction in building industrialization advocated by the housing construction department in China at present, and is a cementing material filled in a connecting sleeve when connecting prefabricated building components. The cementing material mainly takes high-strength cement as a main cementing material, then a dry mixture of a proper mixed material and an additive is prepared, water is added for field pouring, the shock resistance and the integral continuity of an assembled concrete structure are guaranteed, and the high-performance grouting material for the steel bar sleeve, which has the performances of micro-expansion, high fluidity, high strength, early strength, no bleeding and the like, is mainly used for the construction of the assembled building at present and the connection among beams and columns of prefabricated parts guarantees the shock resistance, the load resistance and the structural integrity of the assembled building. The technical performance of the grouting material is directly related to the integrity, the shock resistance and the bearing capacity of the structure.
However, in the preparation process of the existing cement-based grouting material, a common expanding agent is generally added, so that the early expansion effect of the cement-based grouting material is poor, the volume shrinkage phenomenon can occur after a concrete product is condensed due to water evaporation and discharge of gas generated by reaction, and the preparation quality of the cement-based grouting material is greatly reduced.
Disclosure of Invention
The invention discloses a cement-based grouting material for a steel bar sleeve, and aims to solve the technical problems that the existing cement-based grouting material in the background art is poor in early expansion effect due to the fact that a common expanding agent is generally added in the preparation process, and volume shrinkage can occur after a concrete product is condensed due to water evaporation and discharge of gas generated by reaction, so that the preparation quality of the cement-based grouting material is greatly reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
the cement-based grouting material for the steel bar sleeve specifically comprises the following raw materials: the artificial sand comprises cement, water, a water reducing agent, silica fume, fly ash, an expanding agent and a blending material, wherein the cement is ordinary portland cement, the water is tap water, the particle size distribution of the artificial sand is 1.25mm to 2.36mm, the particle size distribution of the silica fume is 0.1-0.15um, the particle size distribution of the fly ash is 80-10um, and the fly ash is second-grade fly ash.
In a preferred embodiment, the preparation method of the cement-based grouting material comprises the following processes:
s1: selecting and optimizing the grain composition of the cement-based high-performance reinforcing steel sleeve grouting material;
s2: development of expansion components and selection of chemical additives;
s3: after the proportion of the raw materials is determined, stirring and dry mixing are carried out according to the requirements and the method in the grouting material for connecting the steel bar sleeve to obtain the sleeve pipe slurry.
In a preferred embodiment, in the step of S1: the method comprises the following steps of researching and designing the particle grading and the maximum particle size of aggregate for the grouting material by means of a laser particle size tester, a sieve analysis method, a sedimentation method and the like so as to enable the aggregate to reach the maximum fluidity when the aggregate is tested by using a truncated cone circular mold, and simultaneously enabling the aggregate to be dense to the maximum degree by controlling the particle grading, so that the compressive strength of the grouting material after hydration and hardening is improved, wherein the method comprises the following steps of S2: the method comprises the following steps of analyzing chemical composition and mineral composition of industrial solid waste phosphogypsum by using an X-ray fluorescence spectrum and an X-ray diffractometer modern material analysis and test technology, and simultaneously testing related physical index materials of fineness and water content, wherein the industrial solid waste phosphogypsum is used as a main raw material and is supplemented with other materials when being analyzed, and micro-expansion components for the reinforcing steel bar sleeve grouting material are developed according to related experimental methods specified in a concrete expanding agent, wherein in the step S3: the grouting material is detected according to a method specified by the standard of the grouting material for the steel bar sleeve connection, the fluidity, the strength and the vertical expansion rate performance indexes of the grouting material are detected, and the sand-lime ratio of the experimental preparation is 1.25:1, water-cement ratio 0.29.
The cement-based grouting material for the steel bar sleeve specifically comprises the following raw materials: the cement is ordinary portland cement, the water is tap water, the particle size distribution of the artificial sand is less than or equal to 1.25mm and less than or equal to 2.36mm, the particle size distribution of the silica fume is 0.1-0.15um, the particle size distribution of the fly ash is 80-10um, and the fly ash is secondary fly ash. The cement-based grouting material for the steel bar sleeve, provided by the invention, has the advantages that the grouting material meeting the industrial requirements can be obtained by repeatedly researching and obtaining the fact that the amount of the water reducing agent accounts for 1-1.5% of the total material amount through experiments; the less the silica fume mixing amount is, the more the cement mixing amount is increased, the better the technical effect of improving the fluidity of the grouting material can be achieved.
Drawings
Fig. 1 is a design diagram of a vertical expansion rate experiment mix proportion of the cement-based grouting material for the steel sleeve provided by the invention.
Fig. 2 is a design diagram of a grouting material fluidity test mix proportion of the cement-based grouting material for the steel sleeve provided by the invention.
Fig. 3 is an experimental chart for exploring the expansibility of the grouting material of the cement-based grouting material for the steel sleeve.
FIG. 4 is an experimental diagram showing the influence of the mixing amount of the water reducer of the cement-based grouting material for a steel sleeve on the fluidity of a grouting material product.
Fig. 5 is a practical diagram of the influence of the mixing amount of the cement slurry of the cement-based grouting material for the steel sleeve on the fluidity of a grouting material product.
Fig. 6 is an experimental diagram of the influence of the doping amount of the active admixture of the cement-based grouting material for the steel sleeve on the fluidity of the grouting material product.
Fig. 7 is a recorded graph of strength measurement of a grouting material product of the cement-based grouting material for a steel sleeve provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The cement-based grouting material for the steel bar sleeve specifically comprises the following raw materials: the cement is ordinary portland cement, the water is tap water, the particle size distribution of artificial sand is 1.25 mm-r-2.36 mm, the particle size distribution of silica fume is 0.1-0.15um, the particle size distribution of fly ash is 80-10um, the fly ash is secondary fly ash, the artificial sand plays a role of a slurry support framework in the grouting material, the compressive strength of the grouting material is improved, the silica fume is a superfine active blending material, the strength of the grouting material product can be improved, and slurry segregation and bleeding can be prevented.
In a preferred embodiment, the method for preparing the cement-based grouting material comprises the following processes:
s1: selecting and optimizing the grain composition of the cement-based high-performance reinforcing steel sleeve grouting material;
s2: development of expansion components and selection of chemical additives;
s3: after the proportion of the raw materials is determined, stirring and dry mixing are carried out according to the requirements and the method in the grouting material for connecting the steel bar sleeve to obtain the sleeve pipe slurry.
In a preferred embodiment, in the step of S1: the grain composition and the maximum grain diameter of the aggregate for the grouting material are researched and designed by means of a laser grain size tester, a sieve analysis method, a sedimentation method and the like, so that the aggregate for the grouting material achieves the maximum fluidity when the aggregate is tested by using a truncated cone circular mold, and simultaneously, the aggregate achieves the maximum compactness by controlling the grain composition, and further improves the compressive strength of the grouting material after the slurry is hydrated and hardened.
In a preferred embodiment, in the step of S2: the chemical composition and mineral composition of the industrial solid waste phosphogypsum are analyzed by utilizing the modern material analysis and test technology of an X-ray fluorescence spectrum and an X-ray diffractometer, and the related physical indexes of fineness and water content are tested at the same time.
In a preferred embodiment, the industrial solid waste phosphogypsum is used as a main raw material for analysis, and is supplemented with other materials, and a micro-expansion component for the reinforcing steel bar sleeve grouting material is developed according to a relevant experimental method specified in a concrete expanding agent.
In a preferred embodiment, in the step of S3: and detecting the fluidity, strength and vertical expansion rate performance indexes of the grouting material according to a method specified by the standard of the grouting material for connecting the reinforcing steel bar sleeve.
In a preferred embodiment, the experimentally prepared sand-lime ratio is 1.25:1, water-cement ratio of 0.29.
Raw material
The raw materials used in the experiment are shown in the table below:
the ratio of ash to sand is 1.25:1, the water cement ratio is 0.29, but the total volume weight of the components in the secondary experiment is 2500, and the micro-expansion performance, the fluidity, the high strength and the early strength of a grouting material photo are adjusted by adjusting the mixing amount ratio of an expanding agent, a water reducing agent and a blending material, wherein the specific mixing amount is shown in the attached figure 1;
the basic scheme of the test and improvement experiment design of the fluidity of the cement-based grouting material is shown in the attached figure 2; the conventional performance research of the reinforced sleeve grouting material comprises the following steps:
according to the experimental design, after being uniformly stirred by a mortar stirrer, the mortar is subjected to mortar strength test according to GB/T17671-1999 cement mortar strength test method, and the flexural strength and the compressive strength of the mortar are respectively measured for 1d, 3d and 28 d. The fluidity of the grouting material is detected according to JC/T408-2013 grouting material for connecting steel bars, because of the particularity of the grouting material, the truncated cone circular mill is placed on a horizontal glass plate, the mortar is poured into the truncated cone circular mill without vibration, the mortar is lifted upwards to enable the mortar to flow freely to be static, and the initial fluidity and the fluidity for 30min are measured. The 3h expansion coefficient and the 24 expansion coefficient of the grouting material are determined by referring to a method for determining the vertical expansion rate of the grouting material in JC/T408-2013 grouting material for connecting reinforcing steel bars.
Results and discussion
Expansion behaviour
The analysis of the attached figure 3 shows that the two groups of experiments A001 and A002 are blank control group experiments of the influence of the expanding agent on the expansion performance of the grouting material test piece. The comparison shows that the grouting material product with the contracted volume does not contain the addition of the expanding agent; according to the research of volume shrinkage caused by hydration reaction of cement clinker minerals, the hydration reaction of the cement clinker minerals can cause volume shrinkage, and secondly, the volume shrinkage is caused after the concrete product without the expanding agent is condensed due to water evaporation and the discharge of reaction generated gas.
In 3h, the volume of the group A001 grouting material shows a contraction trend without adding an expanding agent, while the volume of the group A002 grouting material slurry added with 1% of a common expanding agent and without adding a plastic expanding agent also shows a contraction trend, namely LER (vertical expansion rate) shows a descending trend, but the contraction degree is relatively small, and the change of the vertical expansion rate is relatively small; the reason for this change is that the cement hydration chemical shrinkage, and the group A002 has a lower LER (vertical expansion rate) tendency than the group A002 because of the addition of the expanding agent.
Therefore, the grouting material with proper addition can offset the solidification shrinkage of the grouting material and even achieve the micro-expansion effect.
Meanwhile, the LER change trend of A001 is analyzed, and the LER (vertical expansion rate) is basically linearly contracted in the first 15min and has a larger contraction rate along with the increase of time when the plastic expansion component and the common expansion component are not added in the first 3h of the stirring of the grouting material with water, the contraction rate of the grouting material is reduced after 15 minutes, and the grouting material is quickly contracted after 2 h. The shrinkage change trend of 'first rapid, then slow and then rapid' is shown, which is mainly because the hydration reaction of clinker minerals and active admixture in cement is very rapid in the first 15min of the water adding and stirring of the grouting material, the cement basically shrinks linearly for 15min, and the shrinkage rate is large; as the hydration reaction of cement clinker proceeds, the produced colloid such as calcium silicate hydrate and ettringite is covered on the surface of cement particles, which results in slow cement hydration. The rapid shrinkage after 2 hours is that the hydrated calcium silicate covered on the surface of the cement particles is broken because the moisture continuously permeates into the cement particles to generate hydration reaction, the cement hydration reacts rapidly at one time, and the volume of the grouting material shrinks rapidly again along with the cement hydration reaction.
As can be seen from FIG. 4: experiments show that the amount of the water reducing agent is a main factor influencing the fluidity of the grouting material, and when the amount of the water reducing agent is more than 12g (1%), the slump meeting the requirements of the industry standard can be obtained;
as can be seen from FIG. 5: experiments show that the three groups of experimental data A113, A114 and A115 are compared to each other, so that the mixing amount of cement and water is increased, the water-cement ratio and the amount of other materials are kept unchanged, and the fluidity of the grouting material slurry can be well improved; but from the economic benefit, the cost is increased by increasing the cement mixing amount, and the reasonable consideration is needed;
as can be seen in FIG. 6: experiments show that the mixing amount of the active admixture can influence the fluidity of the grouting material. The particle size of the silica fume is very effective, and the specific surface area of the silica fume is more than 100 times that of cement and more than 70 times that of fly ash. Therefore, in the product process of the grouting material, the added silica fume can be filled between cement particles and in other fine cracks, so that the bleeding of the grouting material is solved, and the fluidity of the grouting material is influenced. Therefore, through comparing three groups of experiments A116, A117 and A118, the fluidity of the grouting material begins to become smaller along with the increase of the silicon ash mixing amount, and when the proportion of the active admixture reaches the A118 group mixing amount, the fluidity of the grouting material does not meet the slump required by the industry standard any more;
compressive strength:
it can be known from fig. 7 that the 28-day compressive strength of a122 reaches 58.5MPa, which is mainly because the compressive strength of the grouting material product is increased when the doping amount of silica fume is close to 10%, and the phenomenon is mainly caused because the specific surface area of silica fume is 100 times larger than that of cement and artificial sand, and in the preparation process of the grouting material, the silica fume can be well filled in cracks of cement and sand, and meanwhile, active substances are filled in gaps of particles and cracks through chemical reaction, so that the damage of the internal shear stress of the grouting material product to the product is reduced, and the compressive strength of the grouting material product is improved.
Conclusion
(1) When the mixing amount of the plastic expanding agent accounts for 0.05 percent of the cementing material amount and the common expanding agent accounts for 1 to 3 percent of the cementing material amount, the requirement of the expansibility of grouting material meeting JG/T408-2013 sleeve grouting material for connecting steel bars can be obtained.
(2) Through repeated experiments, the grouting material meeting the industrial requirements can be obtained by probing that the amount of the water reducing agent accounts for 1-1.5% of the total material amount; the fluidity of the grouting material can be well improved when the mixing amount of the silica fume is less and the mixing amount of the cement is increased;
(3) Experiments show that the compressive strength of the grouting material can be improved by adding the active admixture, and when the fly ash is mixed according to the proportion of 1 (fly ash: silica fume), the optimum value for improving the compressive strength and the fluidity of the grouting material product is achieved by adjusting the active admixture.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The utility model provides a cement base grouting material for steel bar sleeve which characterized in that specifically includes following raw materials: the artificial sand comprises cement, water, a water reducing agent, silica fume, fly ash, an expanding agent and a blending material, wherein the cement is ordinary portland cement, the water is tap water, the particle size distribution of the artificial sand is 1.25mm to 2.36mm, the particle size distribution of the silica fume is 0.1-0.15um, the particle size distribution of the fly ash is 80-10um, and the fly ash is second-grade fly ash.
2. The cement-based grouting material for the reinforced sleeve of claim 1, wherein the preparation method of the cement-based grouting material comprises the following steps:
s1: selecting and optimizing the grain composition of the cement-based high-performance reinforcing steel sleeve grouting material;
s2: development of expansion components and selection of chemical additives;
s3: after the proportion of each raw material is determined, stirring and dry mixing are carried out according to the requirements and methods in the grouting material for connecting the steel bar sleeve to obtain the sleeve pipe slurry.
3. The cement-based grouting material for a steel-reinforced sleeve of claim 2, wherein in the step of S1: the grain composition and the maximum grain diameter of the aggregate for the grouting material are researched and designed by means of a laser grain size tester, a sieve analysis method, a sedimentation method and the like, so that the aggregate for the grouting material achieves the maximum fluidity when being tested by using a truncated cone circular mold, and simultaneously achieves the maximum compactness by controlling the grain composition.
4. The cement-based grouting material for a steel sleeve as claimed in claim 1, wherein in the step of S2: the chemical composition and the mineral composition of the industrial solid waste phosphogypsum are analyzed by utilizing an X-ray fluorescence spectrum and an X-ray diffractometer modern material analysis and test technology, and meanwhile, the related physical indexes of fineness and water content are tested.
5. The cement-based grouting material for the reinforced steel sleeve as claimed in claim 4, wherein the industrial solid waste phosphogypsum is analyzed by taking phosphogypsum as a main raw material and other materials as auxiliary materials, and micro-expansion components for the grouting material for the reinforced steel sleeve are developed according to relevant experimental methods specified in concrete expanding agents.
6. The cement-based grouting material for a steel-reinforced sleeve of claim 2, wherein in the step of S3: and detecting the fluidity, strength and vertical expansion rate performance indexes of the grouting material according to a method specified by the standard of the grouting material for connecting the reinforcing steel bar sleeve.
7. The cement-based grouting material for the reinforced sleeve as claimed in claim 1, wherein the experimentally prepared mortar-sand ratio is 1.25:1, water-cement ratio 0.29.
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| CN202211106609.8A CN115504735A (en) | 2022-09-13 | 2022-09-13 | Cement-based grouting material for steel bar sleeve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117466603A (en) * | 2023-11-09 | 2024-01-30 | 中国建筑第五工程局有限公司 | Cement-based grouting material special for grouting reinforcement and application thereof |
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| CN112174617A (en) * | 2020-09-18 | 2021-01-05 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Sleeve grouting material for connecting reinforcing steel bars and preparation method and application thereof |
| KR102278926B1 (en) * | 2021-04-09 | 2021-07-19 | 주식회사 지에프시알엔디 | Grout material using carbon-based expansive admixture and construction method using the same |
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2022
- 2022-09-13 CN CN202211106609.8A patent/CN115504735A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007029399A (en) * | 2005-07-26 | 2007-02-08 | Matsushita Denko Bath & Life Kk | Water stream jetting device |
| CN106699077A (en) * | 2016-12-19 | 2017-05-24 | 重庆市建筑科学研究院 | Sleeve grouting material for assembly type building steel bar connection |
| CN106882943A (en) * | 2017-03-30 | 2017-06-23 | 南通职业大学 | A kind of strength cement-based grouting material suitable for chlorion hyposmosis |
| CN112174617A (en) * | 2020-09-18 | 2021-01-05 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Sleeve grouting material for connecting reinforcing steel bars and preparation method and application thereof |
| KR102278926B1 (en) * | 2021-04-09 | 2021-07-19 | 주식회사 지에프시알엔디 | Grout material using carbon-based expansive admixture and construction method using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117466603A (en) * | 2023-11-09 | 2024-01-30 | 中国建筑第五工程局有限公司 | Cement-based grouting material special for grouting reinforcement and application thereof |
| CN117466603B (en) * | 2023-11-09 | 2024-03-19 | 中国建筑第五工程局有限公司 | Cement-based grouting material special for grouting reinforcement and application thereof |
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| Abdalqader et al. | School of Natural and Built Environment, Queens University Belfast, Belfast, BT7 5AG, UK 2 Tracey Concrete Ltd, Enniskillen, BT74 7LF, UK* Corresponding author; e-mail: a. abdalqader@ qub. ac. uk |
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