CN113513123A - Grouting heat-storage maintenance construction method for prefabricated vertical member in low-temperature environment - Google Patents
Grouting heat-storage maintenance construction method for prefabricated vertical member in low-temperature environment Download PDFInfo
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- CN113513123A CN113513123A CN202110859744.9A CN202110859744A CN113513123A CN 113513123 A CN113513123 A CN 113513123A CN 202110859744 A CN202110859744 A CN 202110859744A CN 113513123 A CN113513123 A CN 113513123A
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- grouting
- temperature
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- heat
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- 238000010276 construction Methods 0.000 title claims abstract description 31
- 238000012423 maintenance Methods 0.000 title claims abstract description 23
- 238000005338 heat storage Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 54
- 238000004321 preservation Methods 0.000 claims abstract description 27
- 239000004744 fabric Substances 0.000 claims abstract description 18
- 239000004033 plastic Substances 0.000 claims abstract description 18
- 229920003023 plastic Polymers 0.000 claims abstract description 18
- 229920000742 Cotton Polymers 0.000 claims abstract description 17
- 239000004698 Polyethylene Substances 0.000 claims abstract description 10
- -1 polyethylene Polymers 0.000 claims abstract description 10
- 229920000573 polyethylene Polymers 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000011440 grout Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims 2
- 239000011268 mixed slurry Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002023 wood Substances 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- YYRMJZQKEFZXMX-UHFFFAOYSA-N calcium;phosphoric acid Chemical compound [Ca+2].OP(O)(O)=O.OP(O)(O)=O YYRMJZQKEFZXMX-UHFFFAOYSA-N 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 239000002426 superphosphate Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
- E04G21/246—Safety or protective measures preventing damage to building parts or finishing work during construction specially adapted for curing concrete in situ, e.g. by covering it with protective sheets
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
Abstract
The invention discloses a grouting heat-storage maintenance construction method for prefabricated vertical members in a low-temperature environment, and aims to solve the technical problem that grouting construction of the prefabricated vertical members cannot be carried out in the low-temperature environment in the prior art. The method comprises the steps of mixing the low-temperature sleeve grouting material according to the proportion and the mixing process requirement, grouting the prefabricated vertical component by adopting the mixed low-temperature sleeve grouting material, subsequently adopting heat preservation measures, pasting the heat preservation plate, paving the cotton felt layer and paving the closed polyethylene plastic cloth layer so as to achieve the effect of heat preservation and maintenance, continuously increasing the strength of the grouting material to be more than 35MPa, dismantling the heat preservation facility and completing the grouting construction of the assembled vertical component in the low-temperature environment.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a grouting heat-storage maintenance method for prefabricated vertical members in a low-temperature environment.
Background
At present, a reinforced sleeve concrete grouting technology is adopted for the popularization of the fabricated concrete structure, and sleeve grouting materials are used as bonding materials to enable the sleeve and the steel bar to be effectively combined together to work together, and meanwhile, the requirements of the fabricated concrete structure construction are met. In the installation and construction of the concrete assembly type building structure, the steel bar sleeve grouting connection is a key construction link, and the quality of the steel bar sleeve grouting connection has decisive influence on the safety of the whole structure.
In JGJ355, the grouting construction method at the temperature of below 5 ℃ is not explicitly proposed. The temperature is lower than 5 ℃ in severe cold and cold areas in the north of China, especially in several months in winter, and the advantages of the fabricated building are greatly weakened if no construction is carried out in the season.
Disclosure of Invention
The invention aims to provide a grouting heat-storage maintenance construction method for prefabricated vertical members in a low-temperature environment, and the grouting heat-storage maintenance construction method is used for solving the technical problem that grouting construction of the prefabricated vertical members cannot be carried out in the low-temperature environment in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
a low-temperature environment prefabricated vertical workpiece grouting heat-storage maintenance construction method is designed, and comprises the following steps:
1) burying a temperature measuring line in the steel bar grouting sleeve: a temperature measuring line is required to be pre-buried in the grouting sleeve before grouting, and the temperature measuring line is matched with a temperature measuring instrument for use, so that the temperature of slurry in the vertical member is measured after grouting is finished;
2) before the low-temperature sleeve grouting material is mixed, measuring and preheating the temperature of water and the grouting material raw materials: mixing the grouting material strictly according to the proportion and the mixing process, measuring and preheating the water temperature and the temperature of the grouting raw material in advance, and ensuring that the temperature of the water is between 5 and 10 ℃ and the temperature of the grouting raw material is between 5 and 10 ℃;
3) mixing and temperature control of low-temperature sleeve grouting material: adding water and then feeding the grouting material when the grouting material is mixed, wherein the feeding amount in one step is not more than 80% of the total amount, adding the rest powder after stirring for 2-3 minutes, and then quickly stirring for 1-2 minutes, wherein after the grouting material is stirred, the temperature of the stirred slurry is measured and preheated, and the temperature of the slurry is ensured to be 5-10 ℃;
the low-temperature sleeve grouting material comprises the following raw materials in parts by weight:
PO 52.5400-500 parts, R.SAC52.5400-500 parts, 20-40 mesh mountain sand 0-200 parts, 30-50 mesh mountain sand 400-600 parts, 40-70 mesh mountain sand 400-600 parts, heavy calcium carbonate 30-50 parts, mineral powder 40-60 parts, composite expanding agent 40-60 parts, and polycarboxylic acid water reducer 5-7 parts.
4) Detecting the initial fluidity of the low-temperature sleeve grouting material;
5) pouring low-temperature sleeve grouting material: the low-temperature sleeve grouting material has the characteristics of quick setting and early strength, and is required to be quickly stirred and quickly grouted within 35 minutes;
6) plugging the grouting holes and the grout outlet holes;
7) and (3) insulating and covering the grouting part: laying a heat insulation plate, a cotton felt layer and a plastic cloth layer in sequence from inside to outside by a vertical member, and sealing the periphery;
8) measuring the temperature of the internal environment and the external environment;
9) maintaining and dismantling the heat preservation facility: the low-temperature sleeve grouting material is maintained through temperature storage, the strength of the grouting material is continuously increased along with the maintenance time after the grouting material is poured, and the heat preservation facility can be detached when the strength of the grouting material reaches more than 35 MPa.
Preferably, in the step 4), the initial fluidity of the low-temperature sleeve grouting material is more than or equal to 300 mm.
Preferably, in the step 5), when the grouting material is poured, the grouting machine adopts a variable-frequency forced mixer.
Preferably, in the step 6), the grouting holes and the grout outlet holes are rapidly plugged.
Preferably, in the step 6), the heat-insulating plate is a 50mm thick extruded plate, and the heat-insulating plate is paved from the bottom of the vertical member to a position with a vertical height of 500 mm.
Preferably, in the step 7), the cotton felt and the closed polyethylene plastic cloth are fixed by using steel nails so as to be tightly attached to the wall surface, so that the cold air is prevented from entering and the heat inside the grouting sleeve is prevented from diffusing outwards, and the internal temperature is kept within a certain range.
Preferably, in the step 7), the cotton felt and the sealed polyethylene plastic cloth extend to the outer side of the heat preservation part at the bottom end of the vertical component and the top end of the heat preservation plate by more than or equal to 100mm, and 100 × 50 square timber is adopted for plugging the edge of the heat preservation part of the vertical component.
Compared with the prior art, the invention has the main beneficial technical effects that:
the invention adopts the low-temperature sleeve grouting material to perform grouting on the prefabricated vertical component, and subsequently adopts heat preservation measures to perform pasting of the heat preservation plate, laying of the cotton felt layer and laying of the closed polyethylene plastic cloth layer to achieve the effect of heat storage maintenance, thereby solving the technical problem that grouting construction of the prefabricated vertical component cannot be performed in a low-temperature environment in the prior art, and ensuring that grouting construction of the prefabricated vertical component can still be performed in the low-temperature environment.
Detailed Description
The following examples are given to illustrate specific embodiments of the present invention, but are not intended to limit the scope of the present invention in any way.
The unit modules and sensors in the following examples are all conventional commercial products unless otherwise specified.
Example 1: a low-temperature environment prefabricated vertical member grouting heat-storage maintenance construction method comprises the following construction processes:
embedding a temperature measuring line in a steel bar grouting sleeve, carrying out heat preservation and transportation on grouting raw materials of a low-temperature sleeve, measuring the temperature of water and the grouting raw materials before mixing of the grouting materials of the low-temperature sleeve, mixing and temperature control of the grouting materials of the low-temperature sleeve, pouring the grouting materials of the low-temperature sleeve, plugging a grouting hole and a grout outlet, checking after pouring, pasting a heat preservation plate, paving a cotton felt, paving a plastic cloth, plugging square wood, measuring the temperature of an internal environment and an external environment, and carrying out maintenance and dismantling heat preservation measures.
The concrete operation of the construction method for grouting, heat storage and maintenance of the prefabricated vertical member in the low-temperature environment is as follows:
burying a temperature measuring line in the steel bar grouting sleeve: a temperature measuring line needs to be buried in the grouting sleeve in advance before grouting, and the temperature measuring line is matched with a temperature measuring instrument to be used for measuring the temperature of slurry in the vertical member after grouting is completed.
And (3) heat preservation and transportation of the low-temperature sleeve grouting raw material: and in the process of removing the grouting raw materials from the storeroom and transporting the grouting raw materials to a construction site, a wrapping covering measure is adopted to prevent heat loss.
Measuring the temperature of water and grouting raw materials before mixing the low-temperature grouting material:
the low-temperature sleeve grouting material comprises the following raw materials in percentage by weight: PO 52.5450 parts, R.SAC52.5450 parts, 20-40 mesh mountain sand 150 parts, 30-50 mesh mountain sand 500 parts, 40-70 mesh mountain sand 500 parts, triple superphosphate 40 parts, mineral powder 50 parts, composite expanding agent 50 parts and polycarboxylic acid water reducing agent 6 parts.
And (3) mixing the grouting material strictly according to the proportion and the mixing process, measuring the water temperature and the temperature of the grouting raw material in advance, and ensuring that the temperature of the water is between 5 and 20 ℃ and the temperature of the grouting raw material is between 10 and 20 ℃.
Mixing and temperature control of low-temperature sleeve grouting material: when the grouting material is mixed, firstly adding water and then feeding, wherein the feeding in one time is not more than 80% of the total amount, stirring for 2-3 minutes, then adding the rest powder, and quickly stirring for 1-2 minutes, wherein construction machines and tools need to be cleaned in time, and the construction machines and tools need to be cleaned as soon as possible after being used; the mixed grouting material is firstly detected by a temperature detector, the temperature of the mixed grouting material is controlled, the temperature of the grouting material is preferably 5-10 ℃, the grouting material can be properly preheated when the atmospheric environment is at negative temperature, and the mixing water can be properly heated. And after the slurry is stirred, taking the corresponding slurry for fluidity detection, wherein the initial fluidity is not less than 300 mm.
Pouring low-temperature sleeve grouting material: the low-temperature grouting material has the characteristics of quick setting and early strength, and can be quickly grouted as soon as possible after being stirred and used up within 35 minutes. The grouting machine adopts a variable-frequency forced stirrer.
Plugging a grouting hole and a grout outlet hole: observing whether grout flows into each grout outlet hole locking cap opening or not during grouting, adjusting the gear of a grouting machine to be slowly grouted when all grout is reserved in all the grout outlet hole locking cap openings, pulling out a grouting nozzle after grouting is finished and rapidly plugging the grouting opening, discharging the grout from the upper grout outlet holes one by one after grouting for a period of time, pushing a spring pulling sheet in each grout outlet hole to the top of the grout, and filling the whole grout outlet opening until the top of the grout outlet hole locking cap opening is full, and when the grout in all the grout outlet hole locking cap openings flows out in a columnar shape, pulling out a grouting pump nozzle and rapidly plugging the grouting opening by using the plugging cap opening.
And (3) checking after the completion of perfusion: and after the pouring is finished, checking each grouting hole and each grout outlet, checking whether the plugging is finished or not, ensuring that the plugging is compact and preventing the temperature from losing.
Pasting the heat preservation plate: the heat preservation plate is an extruded plate with the thickness of 50mm, when grouting is finished, heat preservation covering of a grouting position is immediately carried out, firstly, the pre-assembled extruded plate with the thickness of 50mm is pasted in the grouting height range of the prefabricated part through double-sided adhesive, and the extruded plate is paved to the position with the vertical height of 500mm from the bottom of the vertical part. Holes are reserved in the positions of the grouting holes and the grout outlet holes of the wall body before the extruded sheet is adhered, so that the extruded sheet is adhered to the wall surface more tightly. After the extruded sheet is adhered, the holes reserved in the extruded sheet are plugged through the adhesive tape, so that the extruded sheet and the heat-insulation board form a whole body to prevent air from directly contacting with the wall body.
Paving a cotton felt layer: after the heat preservation plate is pasted, the heat preservation plate is wrapped by a layer of cotton felt to achieve the heat storage effect.
Laying a plastic cloth layer: and finally, wrapping the cotton felt by using closed polyethylene plastic cloth, adhering the closed polyethylene plastic cloth by using an adhesive tape, fixing the cotton felt and the plastic cloth by using steel nails, so that the cotton felt and the plastic cloth are tightly attached to the wall surface, preventing cold air from entering and preventing heat inside the grouting sleeve from diffusing outwards, and keeping the internal temperature within a certain range.
Square wood plugging: the cotton felt and the sealed polyethylene plastic cloth extend to the outer side of the heat preservation part at the bottom end of the vertical component and the top end of the heat preservation plate by more than or equal to 100mm, 100-50 square wood is adopted for plugging the edge of the heat preservation part of the vertical component, and steel nails penetrate through the plastic cloth and are fixed on the vertical component so as to ensure that the heat preservation structure is sealed up and down.
Measuring the temperature of the internal environment and the external environment: and measuring and counting the temperature of the slurry inside the component within 48 hours after grouting is finished through the pre-embedded temperature measuring line, and simultaneously recording the internal temperature of the sleeve and the external environment temperature, wherein the measurement is performed once every two hours.
Maintenance and removal of heat preservation measures: the low-temperature sleeve grouting material is maintained through temperature storage, the strength of the grouting material is continuously increased along with the maintenance time after the grouting material is poured, and the heat preservation facility can be detached when the strength of the grouting material reaches more than 35 MPa.
While the present invention has been described with reference to the embodiments, it will be understood by those skilled in the art that various changes in the details of the embodiments may be made without departing from the spirit of the invention, and equivalents of the related components, structures, and materials may be substituted for elements thereof to form multiple embodiments, which are common variations of the present invention and will not be described in detail herein.
Claims (9)
1. The construction method for grouting, heat-storing and maintaining the prefabricated vertical member in the low-temperature environment is characterized by comprising the following steps of:
1) pre-burying a temperature measuring line in a grouting sleeve which is arranged in the vertical component and used for connecting the steel bar grouting, and measuring the temperature of slurry in the vertical component after the grouting is finished by matching with a corresponding temperature measuring instrument;
2) mixing and preparing the grouting material according to the raw material proportion and the mixing process of the low-temperature sleeve grouting material, preheating the grouting powder and water, and monitoring so that the water temperature reaches 5-10 ℃ and the grouting powder temperature reaches 5-10 ℃;
3) detecting that the initial fluidity of the low-temperature sleeve grouting material meets the requirement, then grouting, and plugging the grouting hole and the grout outlet hole after grouting is finished;
4) for the grouting part, sequentially laying an insulation board, a cotton felt layer and a plastic cloth layer from inside to outside on the surface of the vertical member, and sealing the periphery of the insulation board, the cotton felt layer and the plastic cloth layer;
5) monitoring the temperature of the inner environment and the outer environment, recording the measurement result, controlling the water temperature to reach 5-10 ℃ before stirring, the temperature of grouting powder to reach 5-10 ℃, and the temperature of slurry after stirring to be not less than 10 ℃;
6) and (4) carrying out heat storage maintenance on the low-temperature sleeve grouting material, and removing the heat preservation facility when the strength of the grouting material reaches more than 35 MPa.
2. The grouting, heat-storing and maintenance construction method for the prefabricated vertical members in the low-temperature environment according to claim 1, wherein in the step 2), the low-temperature sleeve grouting material comprises the following raw materials in parts by weight:
PO 52.5400-500 parts, R.SAC52.5400-500 parts, 20-40 mesh mountain sand 0-200 parts, 30-50 mesh mountain sand 400-600 parts, 40-70 mesh mountain sand 400-600 parts, heavy calcium carbonate 30-50 parts, mineral powder 40-60 parts, composite expanding agent 40-60 parts, and polycarboxylic acid water reducer 5-7 parts.
3. The grouting heat-storage maintenance construction method for the prefabricated vertical member under the low-temperature environment according to claim 1, characterized in that in the step 2), during the mixing of the grouting material, water is added firstly and then the material is added, the material is added in one time, the material is not more than 80% of the total amount, the rest powder is added after the stirring is carried out for 2-3 minutes, the rapid stirring is carried out for 1-2 minutes, after the stirring of the grouting material is finished, the temperature of the mixed slurry is monitored and preheated, so that the water temperature before the stirring is ensured to reach 5-10 ℃, the temperature of the grouting powder is ensured to reach 5-10 ℃, and the temperature of the slurry after the stirring is ensured to reach 5-10 ℃.
4. The grouting heat-storage maintenance construction method for the prefabricated vertical member in the low-temperature environment according to claim 1, wherein in the step 3), the stirring is continuously performed during the grouting, and the grouting is completed within 35 minutes.
5. The grouting, heat-storing and maintenance construction method for the prefabricated vertical members in the low-temperature environment according to claim 1, wherein in the step 3), the initial fluidity of the grouting material for the low-temperature sleeve is more than or equal to 300 mm.
6. The grouting heat-storage maintenance construction method for the prefabricated vertical member in the low-temperature environment according to claim 1, wherein in the step 3), when grouting is performed, a variable-frequency forced mixer is adopted for a grouting machine.
7. The grouting, heat-storing and maintenance construction method for the prefabricated vertical members in the low-temperature environment according to claim 1, wherein in the step 4), the heat-insulating plates are extruded plates with the thickness of 50mm and are paved from the bottoms of the vertical members to the position with the vertical height of 500 mm.
8. The grouting, heat-storing and maintenance construction method for the prefabricated vertical members in the low-temperature environment according to claim 1, wherein in the step 4), steel nails are used for fixing the cotton felt and the closed polyethylene plastic cloth, so that the cotton felt and the closed polyethylene plastic cloth are tightly attached to the wall surface, cold air is prevented from entering, heat inside the grouting sleeve is prevented from diffusing outwards, and the internal temperature is kept within a certain range.
9. The grouting, heat-storing and maintaining construction method for the prefabricated vertical members in the low-temperature environment according to claim 1, wherein in the step 4), the cotton felt and the closed polyethylene plastic cloth extend to the outer side of the heat-insulating part at the bottom end of the vertical member and the top end of the heat-insulating plate by more than or equal to 100mm, and 100-50 square timbers are used for plugging the edges of the heat-insulating part of the vertical member.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110859744.9A CN113513123A (en) | 2021-07-28 | 2021-07-28 | Grouting heat-storage maintenance construction method for prefabricated vertical member in low-temperature environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110859744.9A CN113513123A (en) | 2021-07-28 | 2021-07-28 | Grouting heat-storage maintenance construction method for prefabricated vertical member in low-temperature environment |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0448488A1 (en) * | 1990-03-23 | 1991-09-25 | Etablissements A. Mure | Coupling for reinforcing bars, sleeve for use in said coupling, and method of forming such coupling |
| US20170218614A1 (en) * | 2016-01-31 | 2017-08-03 | Romeo Ilarian Ciuperca | Self-annealing concrete, self-annealing concrete forms, temperature monitoring system for self-annealing concrete forms and method of making and using same |
| CN107572978A (en) * | 2017-09-27 | 2018-01-12 | 中建材中岩科技有限公司 | Bar connecting sleeve grouting material and preparation method thereof |
| CN110107104A (en) * | 2019-05-10 | 2019-08-09 | 中铁六局集团有限公司 | Assembled architecture wallboard sleeve connection Winter Construction Methods |
| CN111116150A (en) * | 2019-12-25 | 2020-05-08 | 北京纽维逊建筑工程技术有限公司 | Low-temperature environment cement-based grouting material and preparation method thereof |
| CN111807794A (en) * | 2020-07-10 | 2020-10-23 | 山东华迪建筑科技有限公司 | Low-temperature sleeve grouting material and preparation method thereof |
| CN112960958A (en) * | 2021-04-20 | 2021-06-15 | 北京市建筑工程研究院有限责任公司 | Sealing slurry for winter assembly type construction and preparation method thereof |
-
2021
- 2021-07-28 CN CN202110859744.9A patent/CN113513123A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0448488A1 (en) * | 1990-03-23 | 1991-09-25 | Etablissements A. Mure | Coupling for reinforcing bars, sleeve for use in said coupling, and method of forming such coupling |
| US20170218614A1 (en) * | 2016-01-31 | 2017-08-03 | Romeo Ilarian Ciuperca | Self-annealing concrete, self-annealing concrete forms, temperature monitoring system for self-annealing concrete forms and method of making and using same |
| CN107572978A (en) * | 2017-09-27 | 2018-01-12 | 中建材中岩科技有限公司 | Bar connecting sleeve grouting material and preparation method thereof |
| CN110107104A (en) * | 2019-05-10 | 2019-08-09 | 中铁六局集团有限公司 | Assembled architecture wallboard sleeve connection Winter Construction Methods |
| CN111116150A (en) * | 2019-12-25 | 2020-05-08 | 北京纽维逊建筑工程技术有限公司 | Low-temperature environment cement-based grouting material and preparation method thereof |
| CN111807794A (en) * | 2020-07-10 | 2020-10-23 | 山东华迪建筑科技有限公司 | Low-temperature sleeve grouting material and preparation method thereof |
| CN112960958A (en) * | 2021-04-20 | 2021-06-15 | 北京市建筑工程研究院有限责任公司 | Sealing slurry for winter assembly type construction and preparation method thereof |
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