CN113185215A - Grouting material for low-viscosity ultrahigh-performance steel bar sleeve and preparation method thereof - Google Patents

Grouting material for low-viscosity ultrahigh-performance steel bar sleeve and preparation method thereof Download PDF

Info

Publication number
CN113185215A
CN113185215A CN202110378241.XA CN202110378241A CN113185215A CN 113185215 A CN113185215 A CN 113185215A CN 202110378241 A CN202110378241 A CN 202110378241A CN 113185215 A CN113185215 A CN 113185215A
Authority
CN
China
Prior art keywords
grouting material
powder
grouting
low
steel bar
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
CN202110378241.XA
Other languages
Chinese (zh)
Inventor
韦江雄
杨方奇
黄浩良
高鹏
余其俊
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.)
South China University of Technology SCUT
Original Assignee
South China University of Technology SCUT
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by South China University of Technology SCUT filed Critical South China University of Technology SCUT
Priority to CN202110378241.XA priority Critical patent/CN113185215A/en
Publication of CN113185215A publication Critical patent/CN113185215A/en
Pending legal-status Critical Current

Links

Images

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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/26—Carbonates
    • C04B14/28—Carbonates of calcium
    • 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
    • C04B18/141—Slags
    • 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
    • C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention provides a grouting material for a low-viscosity ultrahigh-performance steel bar sleeve and a preparation method thereof. The grouting material consists of grouting dry powder and water, wherein the grouting material dry powder comprises a cementing material, fine aggregate and an additive, and the cementing material comprises the following components in percentage by weight: portland cement, silica fume, mineral powder and fine limestone powder. The sum of the cementitious material and the fine aggregate is equal to 100%. The additive comprises the following components: plastic expanding agent, polycarboxylic acid high-efficiency water reducing agent, middle and later stage expanding agent and defoaming agent. The method comprises the following steps: the grouting material dry powder can be obtained by taking the raw materials according to the mixing proportion, mixing and stirring uniformly, taking 100 parts of the dry powder, adding 9-12 parts of water, and fully stirring by a mortar stirrer to obtain the grouting material. The grouting material has the advantages of low viscosity, high fluidity, ultrahigh strength, early micro-expansibility, no shrinkage in the middle and later periods and the like, so that grouting construction is easier to operate, grouting defects are not generated in the grouting process, and the prefabricated components are stably and reliably connected.

Description

Grouting material for low-viscosity ultrahigh-performance steel bar sleeve and preparation method thereof
Technical Field
The invention relates to the technical field of building materials, in particular to grouting material for a low-viscosity ultrahigh-performance steel bar sleeve and a preparation method thereof
Background
China has the largest building market in the world, but the traditional construction mode is the main mode for building construction at present. The traditional construction mode has the defects of low construction efficiency, high energy consumption, serious pollution, poor construction quality controllability and the like. With the rapid development of economy in China and the optimization transformation of industrial structures, a plurality of green and environment-friendly novel structural systems are continuously generated. The assembly type building is one of the assembly type buildings, has the advantages of high construction efficiency, energy conservation, environmental protection, controllable component quality and the like, and is the main direction of building structure development in China.
The fabricated building is a construction mode that components such as wall boards, beams and columns are molded and maintained in a factory in advance and then transported to a construction site to be assembled and spliced into a building. Because the factory production is adopted, the quality of the prefabricated part is guaranteed more, meanwhile, the assembly type building is convenient and efficient to construct, the assembly type building is not influenced by weather in construction seasons, the construction efficiency can be obviously improved, the number of people for use is reduced, and a large amount of investment cost can be saved. The assembly type building is an energy-saving and environment-friendly construction means, and compared with the traditional construction method, the assembly type building can reduce 80% of water consumption, 20% of occupied land and 40% of construction waste per 100 square meters. At present, the fabricated building becomes one of the main development directions of future building processes, but the fabricated building is still in the starting stage in China, a plurality of problems need to be solved urgently, and the popularization of the fabricated building is seriously hindered.
The prefabricated building is formed by connecting prefabricated components, and the most important link in the construction process is the connection of the prefabricated components. The existing connecting modes of prefabricated parts comprise post-cast concrete connection, slurry anchor lap joint, steel bar sleeve grouting connection, welding connection, bolt connection and the like. The steel bar sleeve grouting connection is the most common connection mode due to simple operation, high construction efficiency and good performance, the utilization rate is up to more than sixty percent, and the connection mode used by most fabricated buildings is steel bar sleeve grouting connection.
The steel bar sleeve grouting connection is characterized in that steel bars reserved at the bottom of the upper prefabricated part are inserted into steel bars buried at the top of the lower prefabricated part, and then grouting materials are poured to realize the connection of the prefabricated parts. Although the steel bar sleeve grouting connection is the most common prefabricated part connection mode at present, problems still exist at present due to the fact that relevant standard and mature matching technology are lacked when China is in the early stage of assembly type building popularization, and constructors lack professional skill training. Firstly, the problems of slurry leakage, insufficient grouting and the like often exist in the construction process, so that the quality of the connection node can not be guaranteed. Secondly because technical development is imperfect, still lack high-efficient practical means to the detection of the assembled building connected node saturation after the construction, also can't carry out effectual detection and remedy to the grout defect in the later stage. The integrity and the earthquake resistance of the fabricated building are guaranteed through the performance of the connecting nodes, and if the performance of the connecting nodes cannot be guaranteed, the quality of the whole building structure cannot be guaranteed.
The method mainly depends on worker system training, reasonable construction method and effective management to ensure grouting compactness in developed countries such as Germany and Japan, but the method is a time-consuming and labor-consuming mode and does not meet the requirement of rapid development of China at present, and the method solves the performance problem of the connection node of the assembly type building from the perspective of grouting materials. Aims to improve the grouting compactness and the mechanical property of the connection node of the fabricated building through the research on the rheological property and the mechanical property of the grouting material and fully ensure the qualification rate of the connection node.
The sleeve grouting material in the current market has the problems of poor quality, low early expansion rate, low strength, poor stability in the later period, poor workability and the like. The method has the advantages that workers on construction sites lack training of professional skills, construction environments of construction sites are complex, grouting defects of connecting nodes can be caused frequently, meanwhile, the existing China still lacks a convenient and effective detection mode for grouting fullness of the connecting nodes, the generated grouting defects cannot be fully repaired, various conditions are combined to seriously harm the quality of the fabricated building, and popularization of the fabricated building in China is hindered. Based on the current situation, a reinforcing steel bar sleeve grouting material with high fluidity, low viscosity, high strength, micro-expansion and no later shrinkage is developed, and the problem that the grouting defect is easy to generate in the construction process of the fabricated building is solved.
Disclosure of Invention
The invention aims to provide a grouting material for a low-viscosity ultrahigh-performance steel bar sleeve and a preparation method thereof.
The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme.
The grouting material for the low-viscosity ultrahigh-performance steel bar sleeve is slightly expanded in the early stage and has excellent working performance, and consists of non-shrinkage ultrahigh-performance grouting material dry powder and water, wherein the grouting material dry powder consists of a cementing material, a fine aggregate and an additive, and the cementing material comprises the following components in percentage by weight: 11-46% of Portland cement, 2-6% of silica fume, 5-20% of mineral powder and 2-8% of fine limestone powder;
the fine aggregate is: 45% -55% of river sand; the sum of the cementing material and the fine aggregate is equal to 100 percent;
the admixture comprises the following components in percentage by mass of the total mass of the grouting material: 0.01-0.03% of plastic expanding agent, 1-1.5% of middle and later stage expanding agent, 0.1-0.5% of defoaming agent and 0.5-0.8% of water reducing agent.
Furthermore, the cementing material in the grouting material dry powder accounts for 45-55% of the total amount of the grouting material dry powder raw material.
Further, the portland cement grade 28d strength is 52.5 MPa.
Further, the silica fume is silicon dioxide with the content of more than 94 percent and the average grain diameter of 0.1 to 0.15 μm.
Further, the river sand is river sand with mud content less than 1%, and the maximum particle size is not more than 2.36 mm.
Further, the middle and later stage swelling agent is an HCSA swelling agent.
Further, the defoaming agent is a polyether modified silicon powder defoaming agent.
Further, the fine limestone powder and the mineral powder account for 14-56% of the grouting material cementing material, and the fine limestone powder and the mineral powder comprise the following components in percentage by weight: 70 percent of fine limestone powder: 30 percent.
Further, the plastic expanding agent is yellow powder obtained by sintering bauxite mineral at 1700 ℃ in a nitrogen atmosphere, and has an average particle size of 3.9 μm.
Further, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, the appearance of the water reducing agent is white powder, and the water reducing rate of the water reducing agent is 33%.
The preparation method of the grouting material for the low-viscosity ultrahigh-performance steel bar sleeve is characterized in that 100 parts of grouting material dry powder is removed according to a determined mixing proportion, 9-12 parts of water is added, and the grouting material is prepared by fully stirring through a mortar stirrer.
The method comprises the following specific steps:
(1) weighing material
Weighing raw materials of the grouting material dry powder according to a determined proportion, wherein the raw materials comprise a cementing material, fine aggregate and an additive, and the cementing material comprises 11-46% of Portland cement, 2-6% of silica fume, 5-20% of mineral powder and 2-8% of fine limestone powder in percentage by weight; the fine aggregate comprises 45 to 55 percent of river sand; the admixture comprises the following components in percentage by mass of the total mass of the grouting material: 0.01-0.03% of plastic expanding agent, 1-1.5% of middle and later stage expanding agent, 0.1-0.5% of defoaming agent and 0.5-0.8% of water reducing agent.
(2) Mixing
Weighing the raw materials, pouring the raw materials into a mortar stirrer, and fully mixing and stirring the raw materials for 5 to 8 minutes to obtain grouting material dry powder;
(3) preparation of
And (3) at a construction site, taking 100 parts of grouting material dry powder according to parts by weight, adding 10-12 parts of water, and stirring for 5 minutes by using a mortar stirrer to obtain the low-viscosity high-strength grouting material.
Compared with the prior art, the invention has obvious advantages and beneficial effects;
1. according to the invention, the limestone powder and the mineral powder form reasonable gradation in proportion, the gap between the cement matrix and the interface transition area is filled to enable the structure to be more compact, and meanwhile, the redundant water is squeezed out to reduce the viscosity of the grouting material; the limestone powder and the mineral powder both have lower water absorption rate, so that the viscosity of the grouting material can be reduced, and the actual water-cement ratio of the grouting material is improved, thereby being beneficial to strength development; the limestone powder and the mineral powder generate a 'complex doping effect' which is beneficial to the development of the strength of the grouting material.
2. The grouting material has excellent working performance and mechanical property, meets the technical requirements of 'grouting material for connecting steel bars' of JG/T408-2013, has 28d strength of more than 100MPa when the initial fluidity reaches 380mm, and has the initial fluidity of 330mm when the strength reaches 140 MPa.
3. The grouting material reduces the drying shrinkage in the middle and later periods, improves the volume stability of the grouting material and greatly reduces the cost of the grouting material by optimizing the types and the mixing amounts of the mineral admixture and the expanding agent;
4. the grouting material has excellent performance, is more convenient to operate, has very low viscosity and extremely low fluidity loss with time, and can meet the requirements of various complex working conditions.
In conclusion, the grouting material for the low-viscosity ultrahigh-performance steel bar sleeve and the preparation method thereof open a new idea in grouting material research and have obvious positive effects.
Drawings
Fig. 1 is a load-displacement curve of a steel bar centering monotonic pulling test performed on four examples, in which the steel bar is pulled out.
Detailed Description
To further illustrate the technical means and effects adopted by the present invention to achieve the predetermined objects, the following detailed description is given to a grouting material for a low-viscosity ultra-high performance steel sleeve and a preparation method thereof according to the present invention, and specific embodiments, features and effects thereof are described in detail.
Example 1
The grouting material comprises grouting material dry powder and water, wherein the grouting material dry powder comprises a main material and an additive, and the cementing material comprises the following components in percentage by weight: 39% of PII 52.5R Portland cement, 2% of silica fume, 5% of superfine mineral powder and 2% of fine limestone powder; the fine aggregate comprises: washing river sand by 50 percent;
the admixture comprises the following components in percentage by weight of the total mass of the grouting material: 0.4% of polyether modified silicon defoamer, 0.85% of polycarboxylic acid high-efficiency water reducing agent, 0.01% of plastic expanding agent and 1.5% of HCSA expanding agent. Weighing the raw materials according to the weight percentage, weighing the PII 52.5R portland cement, the silica fume, the HCSA expanding agent, the superfine mineral powder, the fine limestone powder, the washed river sand, the polyether modified silicon defoaming agent, the polycarboxylic acid high-efficiency water reducing agent and the plastic expanding agent in the raw materials according to the proportion, adding the raw materials into a small-sized stirrer, stirring for 5-7 minutes to obtain grouting material dry powder, taking 100 parts of grouting material dry powder according to the weight percentage, adding 11 parts of water, and stirring according to the standard to obtain grouting material slurry.
Example 2
The grouting material comprises grouting material dry powder and water, wherein the grouting material dry powder comprises a main material and an additive, and the cementing material comprises the following components in percentage by weight: 39.5% of PII 52.5R portland cement, 2% of silica fume, 7% of superfine mineral powder and 3% of fine limestone powder; the fine aggregate comprises: washing river sand by 50 percent;
the admixture comprises the following components in percentage by weight of the total mass of the grouting material: 0.4% of polyether modified silicon defoamer, 0.85% of polycarboxylic acid high-efficiency water reducing agent, 0.01% of plastic expanding agent and 1% of HCSA expanding agent. Weighing the raw materials according to the weight percentage, weighing the PII 52.5R portland cement, the silica fume, the HCSA expanding agent, the superfine mineral powder, the fine limestone powder, the washed river sand, the polyether modified silicon defoaming agent, the polycarboxylic acid high-efficiency water reducing agent and the plastic expanding agent in the raw materials according to the proportion, adding the raw materials into a small-sized stirrer, stirring for 5-7 minutes to obtain grouting material dry powder, taking 100 parts of grouting material dry powder according to the weight percentage, adding 10 parts of water, and stirring according to the standard to obtain grouting material slurry.
Example 3
The grouting material comprises grouting material dry powder and water, wherein the grouting material dry powder comprises a main material and an additive, and the cementing material comprises the following components in percentage by weight: 36% of PII 52.5R Portland cement, 2% of silica fume, 10% of superfine mineral powder and 5% of fine limestone powder; the fine aggregate comprises: washing 45% of river sand with water;
the admixture comprises the following components in percentage by weight of the total mass of the grouting material: 0.4% of defoaming agent, 0.85% of water reducing agent, 0.01% of plastic expanding agent and 1% of HCSA expanding agent. Weighing the raw materials according to the weight percentage, weighing the PII 52.5R portland cement, the silica fume, the HCSA expanding agent, the superfine mineral powder, the fine limestone powder, the washed river sand, the polyether modified silicon defoaming agent, the polycarboxylic acid high-efficiency water reducing agent and the plastic expanding agent in the raw materials according to the proportion, adding the raw materials into a small-sized stirrer, stirring for 5-7 minutes to obtain grouting material dry powder, taking 100 parts of grouting material dry powder according to the weight percentage, adding 11 parts of water, and stirring according to the standard to obtain grouting material slurry.
Example 4
The grouting material comprises grouting material dry powder and water, wherein the grouting material dry powder comprises a main material and an additive, and the cementing material comprises the following components in percentage by weight: 24% of PII 52.5R Portland cement, 2% of silica fume, 15% of superfine mineral powder and 7% of fine limestone powder; the fine aggregate comprises: washing river sand by 50 percent;
the additive comprises the following components in percentage by weight of the total mass of the grouting material: 0.4% of polyether modified silicon defoamer, 0.85% of water reducing agent, 0.01% of plastic expanding agent and 1% of HCSA expanding agent. Weighing the raw materials according to the weight percentage, weighing the PII 52.5R portland cement, the silica fume, the HCSA expanding agent, the superfine mineral powder, the fine limestone powder, the washed river sand, the polyether modified silicon defoaming agent, the polycarboxylic acid high-efficiency water reducing agent and the plastic expanding agent in the raw materials according to the proportion, adding the raw materials into a small-sized stirrer, stirring for 5-7 minutes to obtain grouting material dry powder, taking 100 parts of grouting material dry powder according to the weight percentage, adding 10.5 parts of water, and stirring according to the standard to obtain grouting material slurry.
Table 1 shows the performance test results of the above four examples, and the test shows that the grouting material has very low viscosity, and the performance of the grouting material can meet and be superior to the national standard requirements by freely adjusting the working performance and the mechanical performance of the grouting material through the blending of the raw materials. After grouting the grouting material steel bar sleeve, maintaining for 28d and performing monotonous drawing, and the steel bars are pulled out and broken.
TABLE 1
Figure BDA0003012115040000091
Fig. 1 is a monotonous drawing load-displacement curve of the grouting member of the above four examples, and it can be seen from the graph that in the drawing process, the displacement of the member enters the elastic stage and is in a linear relation with the load along with the increase of the load, when the load reaches about 140KN, the member enters the strengthening stage and then enters the yielding stage, and the displacement changes obviously along with the load in the yielding stage. After the yield stage is reached, if the anchoring strength formed between the grouting material and the reinforcing steel bar and between the grouting material and the sleeve is greater than the tensile strength of the reinforcing steel bar, the fracture load displacement curve is interrupted, if the anchoring strength is less than the tensile strength of the reinforcing steel bar, the reinforcing steel bar can be pulled out, the load displacement curve is rapidly downward, and the load gradually disappears and the displacement is continuously increased to indicate that the grouting material is unqualified. The four examples all have the phenomenon that the reinforcing steel bars are broken, and the performance of the grouting material meets the requirements.

Claims (10)

1. The grouting material for the low-viscosity ultrahigh-performance steel bar sleeve is characterized by comprising non-shrinkage ultrahigh-performance grouting material dry powder and water, wherein the grouting material dry powder comprises a cementing material, a fine aggregate and an additive, and the cementing material comprises the following components in percentage by weight: 11-46% of Portland cement, 2-6% of silica fume, 5-20% of mineral powder and 2-8% of fine limestone powder;
the fine aggregate is: 45% -55% of river sand; the sum of the cementing material and the fine aggregate is equal to 100 percent;
the admixture comprises the following components in percentage by mass of the total mass of the grouting material: 0.01-0.03% of plastic expanding agent, 1-1.5% of middle and later stage expanding agent, 0.1-0.5% of defoaming agent and 0.5-0.8% of water reducing agent.
2. The grouting material for the low-viscosity and ultra-high-performance steel bar sleeve as claimed in claim 1, wherein the cement in the grouting material dry powder accounts for 45-55% of the total amount of the grouting material dry powder raw materials.
3. The grout for low viscosity ultra high performance steel sleeve as claimed in claim 1, wherein the portland cement grade 28d strength is 52.5 MPa.
4. The grout for the low-viscosity ultra-high-performance steel bar sleeve as claimed in claim 1, wherein the silica fume is gray powder with silica content more than 94% and average particle size of 0.1-0.15 μm.
The mineral powder is S95 superfine slag powder and is white powder with the average grain diameter of 9 mu m.
The limestone powder is 1200-mesh superfine limestone powder, and the main component is CaCO3The loss on ignition was 43.59% and the average particle diameter was 13 μm.
5. The grouting material for the low-viscosity ultrahigh-performance steel bar sleeve as claimed in claim 1, wherein the river sand is river sand with a mud content of less than 1%, and the maximum grain size is not more than 2.36 mm;
the middle and later stage expanding agent is an HCSA expanding agent;
the defoaming agent is a polyether modified silicon powder defoaming agent.
6. The grouting material for the low-viscosity ultrahigh-performance steel bar sleeve as claimed in claim 1, wherein the fine limestone powder and the mineral powder account for 14-56% of the grouting material cementing material, and the grouting material comprises the following components in percentage by weight: 70 percent of fine limestone powder: 30 percent.
7. The grouting material for the low-viscosity ultrahigh-performance steel bar sleeve as claimed in claim 1, wherein the plastic expanding agent is yellow powder formed by sintering bauxite mineral at 1700 ℃ in a nitrogen atmosphere, and the average grain diameter is 3.9 μm.
8. The grouting material for the low-viscosity ultrahigh-performance steel bar sleeve as claimed in claim 1, wherein the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, the appearance is white powder, and the water reducing rate is 33%.
9. The method for preparing the grouting material for the low-viscosity ultrahigh-performance steel bar sleeve as claimed in any one of claims 1 to 8, wherein 100 parts of grouting material dry powder is removed according to the determined mixing proportion, 9-12 parts of water is added, and the grouting material is prepared by fully stirring through a mortar stirrer.
10. The preparation method of the grouting material for the low-viscosity ultrahigh-performance steel bar sleeve as claimed in claim 9, is characterized by comprising the following specific steps:
(1) weighing material
Weighing raw materials of the grouting material dry powder according to a determined proportion, wherein the raw materials comprise a cementing material, fine aggregate and an additive, and the cementing material comprises 11-46% of Portland cement, 2-6% of silica fume, 5-20% of mineral powder and 2-8% of fine limestone powder in percentage by weight; the fine aggregate comprises 45 to 55 percent of river sand; the admixture comprises the following components in percentage by mass of the total mass of the grouting material: 0.01-0.03% of plastic expanding agent, 1-1.5% of middle and later stage expanding agent, 0.1-0.5% of defoaming agent and 0.5-0.8% of water reducing agent.
(2) Mixing
Weighing the raw materials, pouring the raw materials into a mortar stirrer, and fully mixing and stirring the raw materials for 5 to 8 minutes to obtain grouting material dry powder;
(3) preparation of
And (3) at a construction site, taking 100 parts of grouting material dry powder according to parts by weight, adding 10-12 parts of water, and stirring for 5 minutes by using a mortar stirrer to obtain the low-viscosity high-strength grouting material.
CN202110378241.XA 2021-04-08 2021-04-08 Grouting material for low-viscosity ultrahigh-performance steel bar sleeve and preparation method thereof Pending CN113185215A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110378241.XA CN113185215A (en) 2021-04-08 2021-04-08 Grouting material for low-viscosity ultrahigh-performance steel bar sleeve and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110378241.XA CN113185215A (en) 2021-04-08 2021-04-08 Grouting material for low-viscosity ultrahigh-performance steel bar sleeve and preparation method thereof

Publications (1)

Publication Number Publication Date
CN113185215A true CN113185215A (en) 2021-07-30

Family

ID=76975030

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110378241.XA Pending CN113185215A (en) 2021-04-08 2021-04-08 Grouting material for low-viscosity ultrahigh-performance steel bar sleeve and preparation method thereof

Country Status (1)

Country Link
CN (1) CN113185215A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113735531A (en) * 2021-11-05 2021-12-03 北京中建建筑科学研究院有限公司 Low-viscosity cement-based complementary slurry and preparation method and construction process thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103910511A (en) * 2014-03-13 2014-07-09 东南大学 A superhigh-strength grouting material free from shrinkage in the whole course used for connection of a steel bar and a sleeve

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103910511A (en) * 2014-03-13 2014-07-09 东南大学 A superhigh-strength grouting material free from shrinkage in the whole course used for connection of a steel bar and a sleeve

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
任淑霞等: "铝矾土膨胀剂的研究", 《混凝土》 *
戢文占: "高强钢筋连接用套筒灌浆料的试验研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 *
陈娟: "矿渣-石灰石粉混凝土基本力学性能与粘结性能研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 *
陈永晟等: "石灰石粉与矿物掺合料的协同作用对砂浆力学性能的影响", 《非金属矿》 *
黄玉娟等: "添加矿粉对灌浆材料流动性影响", 《非金属矿》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113735531A (en) * 2021-11-05 2021-12-03 北京中建建筑科学研究院有限公司 Low-viscosity cement-based complementary slurry and preparation method and construction process thereof

Similar Documents

Publication Publication Date Title
CN101830664B (en) Prestressing anchoring and grouting material additive, as well as preparation method and application thereof
CN108147776A (en) A kind of low temperature bar connecting high performance grouting material and preparation method thereof
CN102924019A (en) High-strength micro-expansive grouting material and its preparation method
CN107793098B (en) High-fluidity rapid repair mortar
CN102251520A (en) Novel cement soil composite mixing pile and pile formation method thereof
CN111517732B (en) Sleeve grouting material composition for connecting iron tailing sand steel bars and preparation and application thereof
CN113060998A (en) Sleeve grouting material for connecting reinforcing steel bars in winter construction and preparation method thereof
CN107200524A (en) A kind of superhigh intensity and high bond performance fibre reinforced concrete and preparation method thereof
CN107140922A (en) Road quick patching mortar and its production method
CN107082614A (en) A kind of sleeve grouting dry powder composite of bar connecting and preparation method thereof
CN114044663B (en) Low-shrinkage early-strength sleeve grouting material and preparation method and application thereof
CN113185215A (en) Grouting material for low-viscosity ultrahigh-performance steel bar sleeve and preparation method thereof
CN104926242A (en) Concrete crack repair grouting material and preparation method thereof
CN102351492A (en) Machine-made sand light-expansion high early strength grouting material and preparation method thereof
CN107512862B (en) Tackifier special for shield synchronous grouting material
CN111606625B (en) Formula and preparation method of C70 high-strength self-compacting concrete
CN108530006A (en) A kind of fabricated construction connection reinforced bar sleeve grouting material and preparation method thereof
CN111908882A (en) Reinforcing fiber anti-crack reinforcing steel bar sleeve grouting material and preparation method thereof
CN104557124B (en) Lightweight anti-crack concrete and preparation method thereof
CN110482955A (en) A kind of high-strength press pulp material and preparation method thereof
CN207211522U (en) Assembled steel tube high-strength concrete column
CN105347744A (en) High-strength prefabricated reinforced concrete hollow square pile
CN105503100B (en) A kind of road and bridge engineering reinforcing high performance grouting material and preparation method thereof
CN114620962A (en) Activated iron tailing powder, grouting material containing activated iron tailing powder and preparation method of grouting material
CN104496354B (en) A kind of cement-based grouting material and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20210730