CN111927125A - Concrete winter maintenance construction method - Google Patents
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- CN111927125A CN111927125A CN202010570841.1A CN202010570841A CN111927125A CN 111927125 A CN111927125 A CN 111927125A CN 202010570841 A CN202010570841 A CN 202010570841A CN 111927125 A CN111927125 A CN 111927125A
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- 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
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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
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/024—Steam hardening, e.g. in an autoclave
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5007—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing
- C04B41/5009—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing containing nitrogen in the anion, e.g. nitrites
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/65—Coating or impregnation with inorganic materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Architecture (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a concrete winter maintenance construction method, which comprises the following steps: step 1, accompanying and transporting concrete; step 2, pouring and tamping concrete; step 3, building a support structure to form an operation space; step 4, performing heat preservation and maintenance on the concrete in the operation space; step 5, arranging temperature and humidity measuring points in the operation space; step 6, monitoring the temperature of the concrete core, the concrete surface and the operation space in real time; and 7, removing the formwork after measuring the strength of the concrete. The invention integrates the advantages of the greenhouse method and the steam curing method in the traditional winter concrete curing construction, has good curing effect and achieves the purposes of economy, convenience and high-efficiency curing.
Description
Technical Field
The invention relates to the technical field of concrete construction methods, in particular to a concrete winter maintenance construction method.
Background
The regions in northern China are wide in area and long in winter, the winter time in northern China and the northwest China is 4 months (11 middle ten days to 3 middle ten days in the next year), the winter time in the northeast China is as long as 5 months (11 months to 4 months in the next year), if the winter construction is not carried out, the construction period is only 7-8 months every year, and the requirements of quick construction and shortening of the construction period cannot be met. In this case, how to perform winter construction in the cold north becomes a problem that needs to be considered in the construction unit.
For example, the invention patent application with the Chinese application number of 201010013658.8 discloses a construction method for one-time pouring of a large-volume concrete bearing platform in winter, which comprises the following steps: step one, binding a reinforcement cage; secondly, arranging a cooling water pipeline and a temperature measuring element; step three, forming template construction, wherein the construction process is as follows: marking template lines and constructing formed brick molds; step four, concrete pouring construction; step five, maintaining and collecting: after the concrete is poured, the surface is timely collected, the surface collection is carried out in two times, the surface collection is carried out after the concrete is poured to the top for the first time, and the surface collection is carried out when the concrete is initially set for the second time; after the initial setting of the concrete, the concrete is maintained in an external water storage mode.
The prior art has at least the following problems:
the proportion and the accompanying mode of the concrete cannot meet the requirements on the strength and the freezing resistance of the concrete for construction in winter, heat preservation measures are not taken in the transportation process, the maintenance mode of the concrete is complex, and the effect is poor.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a concrete winter curing construction method.
The concrete winter maintenance construction method comprises the following steps:
step 1, accompanying and transporting concrete;
step 4, performing heat preservation and maintenance on the concrete in the operation space;
step 5, arranging temperature and humidity measuring points in the operation space, arranging thermometers at the temperature measuring points, and arranging hygrometers at the humidity measuring points;
step 6, monitoring the temperature of the concrete core, the concrete surface and the operation space in real time;
and 7, removing the formwork after measuring the strength of the concrete.
Further, the accompanying and transporting concrete of step 1 comprises:
step 1.1, uniformly stirring dry stones, sand and fly ash in a stirrer according to the weight ratio of 1200: 996: 60, introducing a proper amount of water vapor into the stirrer, stirring, and stopping introducing the water vapor after stirring for 100 seconds;
step 1.2, adding 165 parts by weight of stirring water with the temperature of 55 ℃ into a stirrer and stirring for 35 seconds to ensure that the water content of the mixture in the stirrer is 15-25%;
step 1.3, adding 232 parts by weight of cement into a mixer for mixing until cement paste shells are formed on the surfaces of the dry stones and the dry sand;
step 1.4, stirring 4.5 parts by weight of UNF retarding superplasticizer, 30 parts by weight of UEA concrete expanding agent, 5.4 parts by weight of early strength agent, 6.6 parts by weight of antifreezing agent and 68 parts by weight of mixed water at the temperature of 55 ℃ for 90 seconds.
Further, before the dry stones, the sand and the fly ash in the step 1.1 are put into a mixer for mixing, the dry stones, the sand and the fly ash are preheated, the mixer is washed by hot water, and accumulated water and ice water are removed, so that the mixer is in a normal temperature state.
Further, in step 1.4, the early strength agent is a mixture of triethanolamine and sodium sulfate.
Further, when the concrete is transported in the step 1, a 1.5-2cm wood board is arranged on the periphery of the carriage of the concrete transport vehicle and is tightly attached to the outer wall of the carriage in a cushioning mode, a layer of EPE high-foaming polyethylene foam coiled material covers the wood board, the whole outer wall of the carriage is covered by the EPE high-foaming polyethylene foam coiled material, and the thickened canvas covers the open part of the carriage.
Further, when the concrete is poured in the step 2, a section of heating pipeline is additionally arranged at the tail end of the conveying pipeline of the concrete pump truck, and the concrete is poured by heating through the heating pipeline, so that the mold-entering temperature of the poured concrete is 5-10 ℃.
Further, in the concrete tamping process in the step 2, sodium nitrite, sodium sulfite or calcium nitrite solution with the temperature of 20-30 ℃ and the concentration of 10% is sprayed on the surface of the concrete.
Further, step 3 bearing structure includes frame, bracing piece and support, and frame, bracing piece and support are square steel structure, adopt welded connection, and bearing structure erects the completion back, lays fire prevention rock wool layer and transparent plastic film on bearing structure in proper order.
Further, the step 4 of maintaining the concrete in the working space includes:
step 4.1, directly and integrally paving the EPE high-foaming polyethylene foam coiled material with the thickness of 3.5cm on the concrete surface layer by using a coiled material paving machine;
step 4.2, laying a composite geomembrane and an electric blanket on the high foaming polyethylene (EPE) foam coiled material by adopting a coiled material laying machine;
and 4.3, arranging an air heater and a steam generator in the working space for carrying out heat preservation and maintenance on the cast concrete in the working space.
Further, step 5, arranging temperature and humidity measuring points in the working space, and arranging thermometers at the temperature measuring points, wherein arranging the hygrometers at the humidity measuring points comprises:
step 5.1, measuring the temperature of the concrete core part in a way of arranging a pre-buried temperature measuring line at the position with the depth of half of the thickness of the concrete structure;
step 5.2, directly measuring the surface temperature of the concrete by using an infrared thermometer;
step 5.3, hanging a thermometer and a hygrometer in the operation space, and measuring the temperature and the humidity;
and 5.4, arranging a thermometer in the open air environment, and measuring the temperature of the external environment.
Further, the step 6 of monitoring the temperature of the concrete core, the concrete surface and the working space in real time comprises the following steps: when the temperature change of the external environment temperature is more than 4 ℃ every 2 hours, measuring the temperature of the concrete core part, the concrete surface and the working space at the time interval of every 1 hour; when the temperature change of the external environment temperature is less than 1 ℃ every 2 hours, measuring the temperature of the concrete core part, the concrete surface and the operation space at the time interval of every 3 hours; when the temperature difference between the temperature of the concrete core, the concrete surface and the working space and the external environment temperature is more than 15 ℃, turning off the air heater, and turning off the electric blanket when the temperature difference is still more than 13 ℃ after the air heater is turned off; when the relative humidity of the working space exceeds 98%, the steam generator is turned off; when the temperature difference between the concrete core, the concrete surface and the working space and the external environment temperature is larger than-15 ℃, increasing the gear of the electric blanket and increasing the number of the air heaters.
Further, the step 7 of removing the formwork after the concrete strength is determined comprises the following steps:
step 7.1, after comprehensively judging that the compressive strength of the concrete structure reaches the freezing critical strength required by the specification through a rebound method and a same-condition maintenance test piece pressure test method, performing mould removal work;
step 7.2, measuring the surface temperature of the concrete and the external environment temperature again before removing the formwork, wherein the formwork can be removed when the temperature difference between the surface temperature of the concrete and the external environment temperature is within 2 ℃;
and 7.3, covering the composite geomembrane on the surface of the concrete again after the form is removed until the curing period is finished.
Compared with the prior art, the concrete winter maintenance construction method has the following advantages:
1. by adopting the concrete winter maintenance construction method, the temperature of aggregate and a mixer can be improved by introducing steam in the concrete accompanying process, and dry stones, sand and fly ash are added firstly, then the steam is added, then the mixing water is added, and then the mixing mode of adding cement is adopted, so that cement paste shells can be formed on the surfaces of the dry stones and the sand, and the frost resistance of the concrete can be improved.
2. In the process of tamping the concrete, the sodium nitrite, the sodium sulfite or the calcium nitrite solution with the temperature of 20-30 ℃ and the concentration of 10 percent is sprayed on the surface of the concrete, so that the surface of the concrete can be protected from freezing.
3. The invention integrates the advantages of a greenhouse method and a steam curing method in the traditional winter concrete curing construction, has good curing effect and achieves the purposes of economy, convenience and high-efficiency curing by erecting a simple supporting structure, sequentially laying fireproof rock wool and a transparent plastic film on the supporting structure, directly and integrally laying an EPE (expanded polyethylene) foam coiled material on a concrete surface layer, manually laying a composite geomembrane on the high-Expanded Polyethylene (EPE) foam coiled material, laying an electric blanket on the composite geomembrane and arranging a hot air heater and a steam generator in an operation space.
Drawings
Fig. 1 is a schematic view of the support structure of the present invention.
Shown in the figure: 1-a frame; 2-a support rod; and 3, supporting.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
The concrete winter maintenance construction method comprises the following steps:
step 1, accompanying and transporting concrete;
step 4, performing heat preservation and maintenance on the concrete in the operation space;
step 5, arranging temperature and humidity measuring points in the operation space, arranging thermometers at the temperature measuring points, and arranging hygrometers at the humidity measuring points;
step 6, monitoring the temperature of the concrete core, the concrete surface and the operation space in real time;
and 7, removing the formwork after measuring the strength of the concrete.
Further, the accompanying and transporting concrete of step 1 comprises:
step 1.1, uniformly stirring dry stones, sand and fly ash in a stirrer according to the weight ratio of 1200: 996: 60, introducing a proper amount of water vapor into the stirrer, stirring, and stopping introducing the water vapor after stirring for 100 seconds;
step 1.2, adding 165 parts by weight of stirring water with the temperature of 55 ℃ into a stirrer and stirring for 35 seconds to ensure that the water content of the mixture in the stirrer is 15-25%;
step 1.3, adding 232 parts by weight of cement into a mixer for mixing until cement paste shells are formed on the surfaces of the dry stones and the dry sand;
step 1.4, stirring 4.5 parts by weight of UNF retarding superplasticizer, 30 parts by weight of UEA concrete expanding agent, 5.4 parts by weight of early strength agent, 6.6 parts by weight of antifreezing agent and 68 parts by weight of mixed water at the temperature of 55 ℃ for 90 seconds.
Further, before the dry stones, the sand and the fly ash in the step 1.1 are put into a mixer for mixing, the dry stones, the sand and the fly ash are preheated, the mixer is washed by hot water, and accumulated water and ice water are removed, so that the mixer is in a normal temperature state. Further, in step 1.4, the early strength agent is a mixture of triethanolamine and sodium sulfate.
Further, when the concrete is transported in the step 1, a 1.5-2cm wood board is arranged on the periphery of the carriage of the concrete transport vehicle and is tightly attached to the outer wall of the carriage in a cushioning mode, a layer of EPE high-foaming polyethylene foam coiled material covers the wood board, the whole outer wall of the carriage is covered by the EPE high-foaming polyethylene foam coiled material, and the thickened canvas covers the open part of the carriage.
Further, when the concrete is poured in the step 2, a section of heating pipeline is additionally arranged at the tail end of the conveying pipeline of the concrete pump truck, and the concrete is poured by heating through the heating pipeline, so that the mold-entering temperature of the poured concrete is 5-10 ℃.
Further, in the concrete tamping process in the step 2, sodium nitrite, sodium sulfite or calcium nitrite solution with the temperature of 20-30 ℃ and the concentration of 10% is sprayed on the surface of the concrete.
Further, as shown in fig. 1, step 3 the supporting structure includes a frame 1, a supporting rod 2 and a bracket 3, the frame 1, the supporting rod 2 and the bracket 3 are square steel structures, welded connections are adopted, and after the supporting structure is erected, a fireproof rock wool layer and a transparent plastic film are sequentially laid on the supporting structure.
Further, the step 4 of maintaining the concrete in the working space includes:
step 4.1, directly and integrally paving the EPE high-foaming polyethylene foam coiled material with the thickness of 3.5cm on the concrete surface layer by using a coiled material paving machine;
step 4.2, laying a composite geomembrane and an electric blanket on the high foaming polyethylene (EPE) foam coiled material by adopting a coiled material laying machine;
and 4.3, arranging an air heater and a steam generator in the working space for carrying out heat preservation and maintenance on the cast concrete in the working space.
Further, step 5, arranging temperature and humidity measuring points in the working space, and arranging thermometers at the temperature measuring points, wherein arranging the hygrometers at the humidity measuring points comprises:
step 5.1, measuring the temperature of the concrete core part in a way of arranging a pre-buried temperature measuring line at the position with the depth of half of the thickness of the concrete structure;
step 5.2, directly measuring the surface temperature of the concrete by using an infrared thermometer;
step 5.3, hanging a thermometer and a hygrometer in the operation space, and measuring the temperature and the humidity;
and 5.4, arranging a thermometer in the open air environment, and measuring the temperature of the external environment.
Further, the step 6 of monitoring the temperature of the concrete core, the concrete surface and the working space in real time comprises the following steps: when the temperature change of the external environment temperature is more than 4 ℃ every 2 hours, measuring the temperature of the concrete core part, the concrete surface and the working space at the time interval of every 1 hour; and when the temperature change of the external environment temperature is less than 1 ℃ every 2 hours, measuring the temperature of the concrete core, the concrete surface and the working space at intervals of every 3 hours. When the temperature difference between the temperature of the concrete core, the concrete surface and the working space and the external environment temperature is more than 15 ℃, turning off the air heater, and turning off the electric blanket when the temperature difference is still more than 13 ℃ after the air heater is turned off; and when the relative humidity of the working space exceeds 98%, the steam generator is closed. When the temperature difference between the concrete core, the concrete surface and the working space and the external environment temperature is larger than-15 ℃, increasing the gear of the electric blanket and increasing the number of the air heaters.
Further, the step 7 of removing the formwork after the concrete strength is determined comprises the following steps:
step 7.1, after comprehensively judging that the compressive strength of the concrete structure reaches the freezing critical strength required by the specification through a rebound method and a same-condition maintenance test piece pressure test method, performing mould removal work;
step 7.2, measuring the surface temperature of the concrete and the external environment temperature again before removing the formwork, wherein the formwork can be removed when the temperature difference between the surface temperature of the concrete and the external environment temperature is within 2 ℃;
and 7.3, covering the composite geomembrane on the surface of the concrete again after the form is removed until the curing period is finished.
The present invention is not limited to the above-described embodiments, and any variations, modifications, and alterations that may occur to one skilled in the art without departing from the spirit of the invention are intended to be within the scope of the invention.
Claims (11)
1. A concrete winter maintenance construction method comprises the following steps:
step 1, accompanying and transporting concrete;
step 2, pouring and tamping concrete;
step 3, building a support structure to form an operation space;
step 4, performing heat preservation and maintenance on the concrete in the operation space;
step 5, arranging temperature and humidity measuring points in the operation space;
step 6, monitoring the temperature of the concrete core, the concrete surface and the operation space in real time;
and 7, removing the formwork after measuring the strength of the concrete.
2. The concrete winter curing construction method as claimed in claim 1, wherein the accompanying and transporting concrete in step 1 includes:
step 1.1, uniformly stirring dry stones, sand and fly ash in a stirring machine according to the weight ratio of 1200: 996: 60, introducing a proper amount of water vapor into the stirring machine, stirring, and stopping introducing the water vapor after stirring for 100 s;
step 1.2, adding 165 parts by weight of stirring water at 55 ℃ into a stirrer, and stirring for 35 seconds to ensure that the water content of the mixture in the stirrer is 15-25%;
step 1.3, adding 232 parts by weight of cement into a mixer for mixing until cement paste shells are formed on the surfaces of the dry stones and the dry sand;
step 1.4, stirring 4.5 parts by weight of UNF retarding superplasticizer, 30 parts by weight of UEA concrete expanding agent, 5.4 parts by weight of early strength agent, 6.6 parts by weight of antifreezing agent and 68 parts by weight of mixing water at 55 ℃ for 90 seconds.
3. A winter curing method for concrete according to claim 2, wherein the dry gravel, sand and fly ash are preheated before being mixed in the mixer in step 1.1, and the mixer is washed with hot water.
4. The concrete winter curing construction method of claim 2, wherein the early strength agent in step 1.4 is a mixture of triethanolamine and sodium sulfate.
5. The concrete winter curing construction method as claimed in claim 1, wherein during the concrete transportation in step 1, a 1.5-2cm wooden board is installed on the periphery of the carriage of the concrete transportation truck and closely attached to the outer wall of the carriage, the wooden board is covered with a layer of EPE high foaming polyethylene foam coiled material, the EPE high foaming polyethylene foam coiled material covers the whole outer wall of the carriage, and the open part of the carriage is covered with a thickening canvas.
6. The concrete winter maintenance construction method of claim 1, wherein when the concrete is poured in the step 2, a section of heating pipeline is additionally arranged at the tail end of a conveying pipeline of the concrete pump truck, and the tail end of the heating pipeline is connected with a hose, so that the mold-entering temperature of the concrete is ensured to be between 5 and 10 ℃.
7. A winter curing construction method for concrete according to claim 1, characterized in that during the tamping of the concrete in the step 2, the surface of the concrete is sprayed with a solution of sodium nitrite, sodium sulfite or calcium nitrite with a temperature of 20-30 ℃ and a concentration of 10%.
8. The concrete winter curing construction method according to claim 1, wherein the step 3 of building the support structure comprises the following steps: frame, bracing piece and support, frame, bracing piece and support are square steel structure, adopt welded connection, and bearing structure erects the completion back, lays fire prevention rock wool and transparent plastic film on it in proper order.
9. The winter curing construction method for concrete according to claim 1, wherein the step 4 of maintaining the concrete in the working space includes:
step 4.1, directly rolling and paving the concrete surface layer with 3.5cm thick EPE high foaming polyethylene foam coiled material;
step 4.2, manually laying a composite geomembrane and an electric blanket on the high foaming polyethylene (EPE) foam coiled material in sequence;
and 4.3, arranging a hot air blower and a steam generator in the working space.
10. The concrete winter curing construction method of claim 1, wherein the step 5 of arranging temperature and humidity measuring points in the working space comprises the following steps:
step 5.1, measuring the temperature of the concrete core part in a way of arranging a pre-buried temperature measuring line at the position with the depth of half of the thickness of the concrete structure;
step 5.2, directly measuring the surface temperature of the concrete by using an infrared thermometer;
step 5.3, hanging a thermometer and a hygrometer in the operation space, and measuring the temperature and the humidity;
and 5.4, arranging a thermometer in the open air environment, and measuring the temperature of the external environment.
11. The concrete winter curing construction method of claim 1, wherein the step 6 of monitoring the temperature of the concrete core, the concrete surface and the working space in real time comprises the following steps: measuring the temperature of the concrete core part, the concrete surface and the working space at the time interval of every 1 hour when the temperature change of the external environment temperature is more than 4 ℃ every 2 hours; measuring the temperature of the concrete core, the concrete surface and the working space at the time interval of every 3 hours when the temperature change is less than 1 ℃ every 2 hours; when the temperature difference between the temperature of the concrete core, the concrete surface and the working space and the external environment temperature is more than 15 ℃, turning off the air heater, and turning off the electric blanket when the temperature difference is still more than 13 ℃ after the air heater is turned off; when the relative humidity of the working space exceeds 98%, the steam generator is turned off; when the temperature difference between the concrete core, the concrete surface and the working space and the external environment temperature is more than-15 ℃, increasing the gear of the electric blanket and increasing the number of the air heaters; step 7, the form removal after the concrete strength is determined comprises the following steps:
step 7.1, after comprehensively judging that the compressive strength of the concrete structure reaches the freezing critical strength required by the specification through a rebound method and a same-condition maintenance test piece pressure test method, performing mould removal work;
step 7.2, measuring the surface temperature of the concrete and the external environment temperature again before removing the formwork, wherein the formwork can be removed when the temperature difference between the surface temperature of the concrete and the external environment temperature is within 2 ℃;
and 7.3, covering the composite geomembrane on the surface of the concrete again after the form is removed until the curing period is finished.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113622693A (en) * | 2021-09-14 | 2021-11-09 | 中国二十二冶集团有限公司 | Cast-in-place concrete column heat preservation freeze-proof device |
| CN114673159A (en) * | 2022-05-07 | 2022-06-28 | 华能鹤岗发电有限公司 | Concrete heat preservation construction method for winter construction |
| CN115306168A (en) * | 2022-08-18 | 2022-11-08 | 陕西建工安装集团有限公司 | Heat preservation and moisture preservation method for concrete pouring construction of upper part of steel truss in severe cold environment |
| CN117403563A (en) * | 2023-12-15 | 2024-01-16 | 中交一航局第三工程有限公司 | Winter construction method for cast-in-situ continuous beam of bracket |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20019828U1 (en) * | 2000-11-22 | 2001-03-01 | Integral Energietechnik Gmbh | Base for a snow-bearing winter sports area |
| CN101319494A (en) * | 2008-07-22 | 2008-12-10 | 安蓉建设总公司 | Concrete construction method for extreme cold area in low temperature season |
| CN101781931B (en) * | 2010-01-21 | 2011-06-29 | 中铁二十局集团有限公司 | Construction method of large-volume concrete bearing platform with one-time pouring in winter |
| CN202448214U (en) * | 2011-12-24 | 2012-09-26 | 中国葛洲坝集团股份有限公司 | Concrete precast beam maintenance brooder |
| CN205710462U (en) * | 2016-03-16 | 2016-11-23 | 中交四航工程研究院有限公司 | Magnetic-type electric blanket is used in a kind of concreting in cold weather heating |
| CN106592430A (en) * | 2016-11-14 | 2017-04-26 | 中建三局基础设施工程有限公司 | Cast-in-place winter construction method for hanging basket cantilever |
| CN108483984A (en) * | 2018-05-16 | 2018-09-04 | 陆伟 | A kind of cement concrete high-performance antifreezing agent |
| CN110282924A (en) * | 2019-06-24 | 2019-09-27 | 河南国基建设集团有限公司 | A kind of concrete construction method for winter construction |
-
2020
- 2020-06-19 CN CN202010570841.1A patent/CN111927125A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20019828U1 (en) * | 2000-11-22 | 2001-03-01 | Integral Energietechnik Gmbh | Base for a snow-bearing winter sports area |
| CN101319494A (en) * | 2008-07-22 | 2008-12-10 | 安蓉建设总公司 | Concrete construction method for extreme cold area in low temperature season |
| CN101781931B (en) * | 2010-01-21 | 2011-06-29 | 中铁二十局集团有限公司 | Construction method of large-volume concrete bearing platform with one-time pouring in winter |
| CN202448214U (en) * | 2011-12-24 | 2012-09-26 | 中国葛洲坝集团股份有限公司 | Concrete precast beam maintenance brooder |
| CN205710462U (en) * | 2016-03-16 | 2016-11-23 | 中交四航工程研究院有限公司 | Magnetic-type electric blanket is used in a kind of concreting in cold weather heating |
| CN106592430A (en) * | 2016-11-14 | 2017-04-26 | 中建三局基础设施工程有限公司 | Cast-in-place winter construction method for hanging basket cantilever |
| CN108483984A (en) * | 2018-05-16 | 2018-09-04 | 陆伟 | A kind of cement concrete high-performance antifreezing agent |
| CN110282924A (en) * | 2019-06-24 | 2019-09-27 | 河南国基建设集团有限公司 | A kind of concrete construction method for winter construction |
Non-Patent Citations (1)
| Title |
|---|
| 王异: "《掺外加剂混凝土冬季施工》", 31 December 1983, 黑龙江省建筑情报中心站 * |
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|---|---|---|---|---|
| CN113622693A (en) * | 2021-09-14 | 2021-11-09 | 中国二十二冶集团有限公司 | Cast-in-place concrete column heat preservation freeze-proof device |
| CN114673159A (en) * | 2022-05-07 | 2022-06-28 | 华能鹤岗发电有限公司 | Concrete heat preservation construction method for winter construction |
| CN115306168A (en) * | 2022-08-18 | 2022-11-08 | 陕西建工安装集团有限公司 | Heat preservation and moisture preservation method for concrete pouring construction of upper part of steel truss in severe cold environment |
| CN117403563A (en) * | 2023-12-15 | 2024-01-16 | 中交一航局第三工程有限公司 | Winter construction method for cast-in-situ continuous beam of bracket |
| CN117403563B (en) * | 2023-12-15 | 2024-04-02 | 中交一航局第三工程有限公司 | Winter construction method for cast-in-situ continuous beam of bracket |
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