CN111101714A - Grouting connection construction method for prefabricated components of fabricated building - Google Patents
Grouting connection construction method for prefabricated components of fabricated building Download PDFInfo
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- CN111101714A CN111101714A CN201911410891.7A CN201911410891A CN111101714A CN 111101714 A CN111101714 A CN 111101714A CN 201911410891 A CN201911410891 A CN 201911410891A CN 111101714 A CN111101714 A CN 111101714A
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- Prior art keywords
- grouting
- mortar
- sleeve
- shaped pipe
- steel bar
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Classifications
-
- 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
- E04G21/14—Conveying or assembling building elements
-
- 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
- C04B28/06—Aluminous cements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/383—Connection of concrete parts using adhesive materials, e.g. mortar or glue
-
- 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
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
-
- 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
Abstract
The invention provides a grouting connection construction method for prefabricated components of an assembly type building, which is characterized in that a grouting material containing a reinforced water reducing agent is used for construction, so that the grouting material with high strength and good fluidity is obtained; when grouting, an L-shaped pipe with a funnel at the top is used, mortar in the L-shaped pipe can compensate mortar in the communicating cavity, and the compactness of the mortar in the communicating cavity is increased; the L-shaped pipe is cooled in the grouting process, so that mortar in the L-shaped pipe is guaranteed to be solidified later than mortar in the communication cavity, and the compensation function is further enhanced; and applying pressure to the mortar in the L-shaped pipe funnel from one end of the L-shaped pipe funnel so that the mortar is filled in the whole grouting communicating cavity. The grouting connection construction method is safe, reliable and quick, and has wide application prospect in assembly type buildings.
Description
Technical Field
The invention relates to the technical field of assembly type buildings, in particular to a grouting connection construction method for prefabricated components of an assembly type building.
Background
In recent years, the fabricated concrete structure has been widely popularized and implemented in the field of buildings because of its remarkable advantages in the aspects of engineering quality, energy conservation, environmental protection, social benefits and the like. At present, during the connection construction of prefabricated components of an assembly type building, a connection mode of steel bar sleeve grouting is generally adopted, generally, the grouting connection construction process of the steel bar sleeve mainly comprises the steps of installing and fixing the prefabricated components on a construction site, then sealing a grouting cavity, and then using a sleeve grouting material mixture to perform sleeve grouting, wherein the concrete construction method of grouting and the performance of the grouting material have important influences on the stability and safety of final connection.
Based on the needs, the invention provides a safe, reliable and good-operability grouting connection construction method for prefabricated components of an assembly type building.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a grouting connection construction method for prefabricated components of an assembly type building, which has the following specific technical scheme:
a grouting connection construction method for prefabricated components of an assembly type building comprises the following steps:
s1 preparation work
1) Checking whether the sizes of a sleeve and a steel bar of the prefabricated part to be installed are qualified or not and whether the positions of the sleeve and the steel bar are accurate or not, and checking whether the inside of the sleeve, a grouting hole and a grout outlet are smooth or not;
2) a plurality of annular grooves are processed on the inner wall of the sleeve, and a baffle ring is arranged in the sleeve;
3) cleaning the surfaces of the prefabricated part, the steel bar and the sleeve to ensure no dust, oil stain and water accumulation;
s2 hoisting prefabricated part
1) Hoisting the prefabricated part to an installation position, inserting the steel bar into the sleeve and connecting the steel bar with the sleeve in a threaded manner, and installing sealing rings at two ends of the sleeve;
2) fixing the prefabricated part by using an auxiliary supporting tool;
3) sealing the grouting connection cavity of the prefabricated part by using base slurry;
preparation of S3 mortar
1) Stirring and mixing the grouting material and water, firstly pouring 3/4 water for stirring, adding the rest 1/4 water after stirring for 2 minutes, continuing stirring until the mixture is uniform, and then standing for a few minutes;
2) detecting the fluidity and bleeding condition of the mortar to ensure that the initial fluidity is more than 300 mm;
s4 grouting construction
1) Calculating the amount of mortar required and the operation time according to the actual grouting volume;
2) before grouting, a vacuumizing system is used for vacuumizing the grouting communicating cavity, so that impurities in the communicating cavity are further removed, and a negative pressure environment is formed in the communicating cavity;
3) before grouting, a section of L-shaped pipe is installed and connected at a grout outlet, and a funnel is arranged at the top of the L-shaped pipe;
4) pouring the uniformly stirred mortar into a grouting pump, starting the grouting pump, suspending the grouting pump until the mortar flows out of a grouting pipe, inserting the grouting pipe into a grouting hole, starting the grouting pump to perform grouting, stopping the grouting pump when the mortar can be observed from a funnel at the top end of the L-shaped pipe, quickly blocking the grouting hole, keeping cooling the L-shaped pipe in the whole grouting process, applying pressure to the mortar inside the L-shaped pipe from one end of the L-shaped pipe funnel after 8-10 minutes, maintaining the pressure for 30-60 seconds, removing the L-shaped pipe, and quickly blocking a grout outlet; grouting all the grouting holes in sequence;
s5 curing
Spraying a curing agent for curing within 30 minutes after grouting; the prefabricated part can not be vibrated and impacted within 24 hours after grouting; and 2d later, the subsequent assembly construction can be carried out.
Further, the components of the grouting material in the step S3 are as follows: 30-60 parts of cement, 40-70 parts of aggregate, 1-5 parts of gypsum, 0.5-1.0 part of reinforced water reducing agent, 0.1-0.2 part of retarder, 1-3 parts of expanding agent, 0.005-0.007 part of aluminum powder mixture and 0.1-0.2 part of glass fiber; the reinforced water reducing agent is prepared by the following preparation method: selecting a polycarboxylate superplasticizer monomer (TPEG) as a macromonomer, Acrylic Acid (AA) as an active monomer, methacryloxypropyltriethoxysilane as an interface energy reducing monomer, Ammonium Persulfate (APS) as an initiator and sodium methallylsulfonate as a chain transfer agent, and preparing the reinforced superplasticizer at the temperature of 60 ℃, wherein the molar ratio of TPEG, Acrylic Acid (AA), methacryloxypropyltriethoxysilane, Ammonium Persulfate (APS) and sodium methallylsulfonate is 1: 2.5-4.7: 0.1-0.35: 0.08-0.17: 0.25-0.34.
Further, the cement consists of 75-85% of sulphoaluminate cement and 15-25% of Portland cement in percentage by mass; the aggregate is composed of quartz sand and river sand by mass percent of 40%, wherein the quartz sand comprises 28% of 6-10 meshes, 30% of 10-20 meshes and 42% of 20-40 meshes; the gypsum consists of 50% of dihydrate gypsum and 50% of phosphogypsum in percentage by mass.
Further, in the step S1, the diameter of the inner cavity of the sleeve is 10mm larger than the maximum outer diameter of the steel bar, and the length of the sleeve is 8d +20 mm; d is the maximum outer diameter of the steel bar;
further, in the step S3, the mass ratio of the grouting material to the water is 1: 0.11-0.12.
Compared with the prior art, the invention has the following beneficial effects:
(1) the reinforcing water reducing agent in the grouting material is prepared from a polycarboxylate water reducing agent monomer (TPEG), Acrylic Acid (AA), methacryloxypropyltriethoxysilane, Ammonium Persulfate (APS) and sodium methallylsulfonate, has defoaming and reinforcing functions, a defoaming agent is not needed to be additionally used after the reinforcing water reducing agent is used, the obtained grouting material has good fluidity, the initial fluidity is larger than 340mm, and simultaneously has high strength, the 1d strength reaches 50MPa, the 3d strength is not lower than 65MPa, the 28d strength is not lower than 95MPa, and the use requirement of an assembly type building can be met;
(2) according to the invention, the grouting communicating cavity is vacuumized before grouting construction, so that adverse influence of sundries in the communicating cavity on grouting construction can be effectively avoided, and air in the communicating cavity is discharged due to the formation of negative pressure in the communicating cavity, so that mortar can smoothly enter the communicating cavity when grouting starts;
(3) the invention uses the L-shaped pipe with the funnel at the top part during grouting, the mortar in the L-shaped pipe can compensate the mortar in the communicating cavity, and the compactness of the mortar in the communicating cavity is increased; the L-shaped pipe is cooled in the grouting process, so that mortar in the L-shaped pipe is guaranteed to be solidified later than mortar in the communication cavity, and the compensation function is further enhanced;
(4) the invention applies pressure to the mortar in the L-shaped pipe funnel from one end of the L-shaped pipe funnel, and can effectively ensure that the whole grouting communicating cavity is filled with the mortar.
Detailed Description
The present invention is illustrated below with reference to examples, but it should not be construed that the scope of the above-described subject matter of the present invention is limited thereto.
Example 1:
a grouting connection construction method for prefabricated components of an assembly type building comprises the following steps:
s1 preparation work
1) Checking whether the sizes of a sleeve and a steel bar of the prefabricated part to be installed are qualified or not and whether the positions of the sleeve and the steel bar are accurate or not, and checking whether the inside of the sleeve, a grouting hole and a grout outlet are smooth or not; the diameter of the inner cavity of the sleeve is 10mm larger than the maximum outer diameter of the steel bar, and the length of the sleeve is 8d +20 mm; d is the maximum outer diameter of the steel bar;
2) a plurality of annular grooves are processed on the inner wall of the sleeve, and a baffle ring is arranged in the sleeve;
3) cleaning the surfaces of the prefabricated part, the steel bar and the sleeve to ensure no dust, oil stain and water accumulation;
s2 hoisting prefabricated part
1) Hoisting the prefabricated part to an installation position, inserting the steel bar into the sleeve and connecting the steel bar with the sleeve in a threaded manner, and installing sealing rings at two ends of the sleeve;
the slurry discharge port is arranged in an inverted trapezoid shape, so that feeding of the inner grouting cavity is facilitated.
2) Fixing the prefabricated part by using an auxiliary supporting tool;
3) sealing the grouting connection cavity of the prefabricated part by using base slurry;
preparation of S3 mortar
1) Stirring and mixing the grouting material and water, wherein the mass ratio of the grouting material to the water is 1:0.11, firstly pouring 3/4 water for stirring, adding the rest 1/4 water after stirring for 2 minutes, continuing stirring until the mixture is uniform, and then standing for several minutes;
the grouting material comprises the following components: 30 parts of cement, 40 parts of aggregate, 1 part of gypsum, 0.5 part of water-reducing reinforcing agent, 0.1 part of retarder, 1 part of expanding agent, 0.005 part of aluminum powder mixture and 0.1 part of glass fiber;
the cement consists of 75% of sulphoaluminate cement and 25% of Portland cement in percentage by mass; the aggregate is composed of quartz sand and river sand by mass percent of 40%, wherein the quartz sand comprises 28% of 6-10 meshes, 30% of 10-20 meshes and 42% of 20-40 meshes;
the gypsum consists of 50 percent of dihydrate gypsum and 50 percent of phosphogypsum in percentage by mass;
the reinforced water reducing agent is prepared by the following preparation method: selecting a polycarboxylate superplasticizer monomer (TPEG) as a macromonomer, Acrylic Acid (AA) as an active monomer, methacryloxypropyltriethoxysilane as an interfacial energy reducing monomer, Ammonium Persulfate (APS) as an initiator and sodium methallylsulfonate as a chain transfer agent, and preparing the reinforced superplasticizer at the temperature of 60 ℃, wherein the molar ratio of TPEG, Acrylic Acid (AA), methacryloxypropyltriethoxysilane, Ammonium Persulfate (APS) and sodium methallylsulfonate is 1:2.5:0.1:0.08: 0.25;
2) detecting the fluidity and bleeding condition of the mortar to ensure that the initial fluidity is more than 300 mm;
s4 grouting construction
1) Calculating the amount of mortar required and the operation time according to the actual grouting volume;
2) before grouting, a vacuumizing system is used for vacuumizing the grouting communicating cavity, so that impurities in the communicating cavity are further removed, and a negative pressure environment is formed in the communicating cavity;
3) before grouting, a section of L-shaped pipe is installed and connected at a grout outlet, and a funnel is arranged at the top of the L-shaped pipe;
4) pouring the uniformly stirred mortar into a grouting pump, starting the grouting pump, suspending the grouting pump until the mortar flows out of a grouting pipe, inserting the grouting pipe into a grouting hole, starting the grouting pump to perform grouting, stopping the grouting pump when the mortar can be observed from a funnel at the top end of the L-shaped pipe, quickly blocking the grouting hole, keeping cooling the L-shaped pipe in the whole grouting process, applying pressure to the mortar inside the L-shaped pipe by one end of the L-shaped pipe funnel after 8 minutes, maintaining the pressure for 30 seconds, removing the L-shaped pipe, and quickly blocking a grout outlet; grouting all the grouting holes in sequence;
s5 curing
Spraying a curing agent for curing within 30 minutes after grouting; the prefabricated part can not be vibrated and impacted within 24 hours after grouting; and 2d later, the subsequent assembly construction can be carried out.
Example 2:
a grouting connection construction method for prefabricated components of an assembly type building comprises the following steps:
s1 preparation work
1) Checking whether the sizes of a sleeve and a steel bar of the prefabricated part to be installed are qualified or not and whether the positions of the sleeve and the steel bar are accurate or not, and checking whether the inside of the sleeve, a grouting hole and a grout outlet are smooth or not; the diameter of the inner cavity of the sleeve is 10mm larger than the maximum outer diameter of the steel bar, and the length of the sleeve is 8d +20 mm; d is the maximum outer diameter of the steel bar;
2) a plurality of annular grooves are processed on the inner wall of the sleeve, and a baffle ring is arranged in the sleeve;
3) cleaning the surfaces of the prefabricated part, the steel bar and the sleeve to ensure no dust, oil stain and water accumulation;
s2 hoisting prefabricated part
1) Hoisting the prefabricated part to an installation position, inserting the steel bar into the sleeve and connecting the steel bar with the sleeve in a threaded manner, and installing sealing rings at two ends of the sleeve;
the slurry discharge port is arranged in an inverted trapezoid shape, so that feeding of the inner grouting cavity is facilitated.
2) Fixing the prefabricated part by using an auxiliary supporting tool;
3) sealing the grouting connection cavity of the prefabricated part by using base slurry;
preparation of S3 mortar
1) Stirring and mixing the grouting material and water, wherein the mass ratio of the grouting material to the water is 1:0.12, firstly pouring 3/4 water for stirring, adding the rest 1/4 water after stirring for 2 minutes, continuing stirring until the mixture is uniform, and then standing for several minutes;
the grouting material comprises the following components: 60 parts of cement, 70 parts of aggregate, 5 parts of gypsum, 1.0 part of water-reducing admixture, 0.2 part of retarder, 3 parts of expanding agent, 0.007 part of aluminum powder mixture and 0.2 part of glass fiber;
the cement consists of 85% of sulphoaluminate cement and 15% of Portland cement in percentage by mass; the aggregate is composed of quartz sand and river sand by mass percent of 40%, wherein the quartz sand comprises 28% of 6-10 meshes, 30% of 10-20 meshes and 42% of 20-40 meshes;
the gypsum consists of 50 percent of dihydrate gypsum and 50 percent of phosphogypsum in percentage by mass;
the reinforced water reducing agent is prepared by the following preparation method: selecting a polycarboxylate superplasticizer monomer (TPEG) as a macromonomer, Acrylic Acid (AA) as an active monomer, methacryloxypropyltriethoxysilane as an interfacial energy reducing monomer, Ammonium Persulfate (APS) as an initiator and sodium methallylsulfonate as a chain transfer agent, and preparing the reinforced superplasticizer at the temperature of 60 ℃, wherein the molar ratio of TPEG, Acrylic Acid (AA), methacryloxypropyltriethoxysilane, Ammonium Persulfate (APS) and sodium methallylsulfonate is 1:4.7:0.35:0.17: 0.34;
2) detecting the fluidity and bleeding condition of the mortar to ensure that the initial fluidity is more than 300 mm;
s4 grouting construction
1) Calculating the amount of mortar required and the operation time according to the actual grouting volume;
2) before grouting, a vacuumizing system is used for vacuumizing the grouting communicating cavity, so that impurities in the communicating cavity are further removed, and a negative pressure environment is formed in the communicating cavity;
3) before grouting, a section of L-shaped pipe is installed and connected at a grout outlet, and a funnel is arranged at the top of the L-shaped pipe;
4) pouring the uniformly stirred mortar into a grouting pump, starting the grouting pump until the mortar flows out of a grouting pipe, pausing the grouting pump, inserting the grouting pipe into a grouting hole, starting the grouting pump to perform grouting, stopping the grouting pump when the mortar can be observed from a funnel at the top end of the L-shaped pipe, quickly blocking the grouting hole, keeping cooling the L-shaped pipe in the whole grouting process, applying pressure to the mortar inside the L-shaped pipe by one end of the L-shaped pipe funnel after 10 minutes, removing the L-shaped pipe after maintaining the pressure for 60 seconds, and quickly blocking a grout outlet; grouting all the grouting holes in sequence;
s5 curing
Spraying a curing agent for curing within 30 minutes after grouting; the prefabricated part can not be vibrated and impacted within 24 hours after grouting; and 2d later, the subsequent assembly construction can be carried out.
Example 3:
a grouting connection construction method for prefabricated components of an assembly type building comprises the following steps:
s1 preparation work
1) Checking whether the sizes of a sleeve and a steel bar of the prefabricated part to be installed are qualified or not and whether the positions of the sleeve and the steel bar are accurate or not, and checking whether the inside of the sleeve, a grouting hole and a grout outlet are smooth or not; the diameter of the inner cavity of the sleeve is 10mm larger than the maximum outer diameter of the steel bar, and the length of the sleeve is 8d +20 mm; d is the maximum outer diameter of the steel bar;
2) a plurality of annular grooves are processed on the inner wall of the sleeve, and a baffle ring is arranged in the sleeve;
3) cleaning the surfaces of the prefabricated part, the steel bar and the sleeve to ensure no dust, oil stain and water accumulation;
s2 hoisting prefabricated part
1) Hoisting the prefabricated part to an installation position, inserting the steel bar into the sleeve and connecting the steel bar with the sleeve in a threaded manner, and installing sealing rings at two ends of the sleeve;
the slurry discharge port is arranged in an inverted trapezoid shape, so that feeding of the inner grouting cavity is facilitated.
2) Fixing the prefabricated part by using an auxiliary supporting tool;
3) sealing the grouting connection cavity of the prefabricated part by using base slurry;
preparation of S3 mortar
1) Stirring and mixing the grouting material and water, wherein the mass ratio of the grouting material to the water is 1:0.12, firstly pouring 3/4 water for stirring, adding the rest 1/4 water after stirring for 2 minutes, continuing stirring until the mixture is uniform, and then standing for several minutes;
the grouting material comprises the following components: 40 parts of cement, 60 parts of aggregate, 3 parts of gypsum, 0.7 part of water-reducing admixture, 0.2 part of retarder, 2 parts of expanding agent, 0.006 part of aluminum powder mixture and 0.2 part of glass fiber;
the cement consists of 80 mass percent of sulphoaluminate cement and 20 mass percent of Portland cement; the aggregate is composed of quartz sand and river sand by mass percent of 40%, wherein the quartz sand comprises 28% of 6-10 meshes, 30% of 10-20 meshes and 42% of 20-40 meshes;
the gypsum consists of 50 percent of dihydrate gypsum and 50 percent of phosphogypsum in percentage by mass;
the reinforced water reducing agent is prepared by the following preparation method: selecting a polycarboxylate superplasticizer monomer (TPEG) as a macromonomer, Acrylic Acid (AA) as an active monomer, methacryloxypropyltriethoxysilane as an interfacial energy reducing monomer, Ammonium Persulfate (APS) as an initiator and sodium methallylsulfonate as a chain transfer agent, and preparing the reinforced superplasticizer at the temperature of 60 ℃, wherein the molar ratio of TPEG, Acrylic Acid (AA), methacryloxypropyltriethoxysilane, Ammonium Persulfate (APS) and sodium methallylsulfonate is 1:3.5:0.2:0.11: 0.3;
2) detecting the fluidity and bleeding condition of the mortar to ensure that the initial fluidity is more than 300 mm;
s4 grouting construction
1) Calculating the amount of mortar required and the operation time according to the actual grouting volume;
2) before grouting, a vacuumizing system is used for vacuumizing the grouting communicating cavity, so that impurities in the communicating cavity are further removed, and a negative pressure environment is formed in the communicating cavity;
3) before grouting, a section of L-shaped pipe is installed and connected at a grout outlet, and a funnel is arranged at the top of the L-shaped pipe;
4) pouring the uniformly stirred mortar into a grouting pump, starting the grouting pump until the mortar flows out of a grouting pipe, pausing the grouting pump, inserting the grouting pipe into a grouting hole, starting the grouting pump to perform grouting, stopping the grouting pump when the mortar can be observed from a funnel at the top end of the L-shaped pipe, quickly blocking the grouting hole, keeping cooling the L-shaped pipe in the whole grouting process, applying pressure to the mortar inside the L-shaped pipe by one end of the L-shaped pipe funnel after 9 minutes, maintaining the pressure for 50 seconds, removing the L-shaped pipe, and quickly blocking a grout outlet; grouting all the grouting holes in sequence;
s5 curing
Spraying a curing agent for curing within 30 minutes after grouting; the prefabricated part can not be vibrated and impacted within 24 hours after grouting; and 2d later, the subsequent assembly construction can be carried out.
Although exemplary embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions, substitutions and the like can be made in form and detail without departing from the scope and spirit of the invention as disclosed in the accompanying claims, all of which are intended to fall within the scope of the claims, and that various steps in the various sections and methods of the claimed product can be combined together in any combination. Therefore, the description of the embodiments disclosed in the present invention is not intended to limit the scope of the present invention, but to describe the present invention. Accordingly, the scope of the present invention is not limited by the above embodiments, but is defined by the claims or their equivalents.
Claims (5)
1. A grouting connection construction method for prefabricated components of an assembly type building comprises the following steps:
s1 preparation work
1) Checking whether the sizes of a sleeve and a steel bar of the prefabricated part to be installed are qualified or not and whether the positions of the sleeve and the steel bar are accurate or not, and checking whether the inside of the sleeve, a grouting hole and a grout outlet are smooth or not;
2) a plurality of annular grooves are processed on the inner wall of the sleeve, and a baffle ring is arranged in the sleeve;
3) cleaning the surfaces of the prefabricated part, the steel bar and the sleeve to ensure no dust, oil stain and water accumulation;
s2 hoisting prefabricated part
1) Hoisting the prefabricated part to an installation position, inserting the steel bar into the sleeve and connecting the steel bar with the sleeve in a threaded manner, and installing sealing rings at two ends of the sleeve;
2) fixing the prefabricated part by using an auxiliary supporting tool;
3) sealing the grouting connection cavity of the prefabricated part by using base slurry;
preparation of S3 mortar
1) Stirring and mixing the grouting material and water, firstly pouring 3/4 water for stirring, adding the rest 1/4 water after stirring for 2 minutes, continuing stirring until the mixture is uniform, and then standing;
2) detecting the fluidity and bleeding condition of the mortar to ensure that the initial fluidity is more than 300 mm;
s4 grouting construction
1) Calculating the amount of mortar required and the operation time according to the actual grouting volume;
2) before grouting, a vacuumizing system is used for vacuumizing the grouting communicating cavity, so that impurities in the communicating cavity are further removed, and a negative pressure environment is formed in the communicating cavity;
3) before grouting, an L-shaped pipe is installed and connected at a grout outlet, and a funnel is arranged at the top of the L-shaped pipe;
4) pouring the uniformly stirred mortar into a grouting pump, starting the grouting pump, suspending the grouting pump until the mortar flows out of a grouting pipe, inserting the grouting pipe into a grouting hole, starting the grouting pump to perform grouting, stopping the grouting pump when the mortar can be observed from a funnel at the top end of the L-shaped pipe, quickly blocking the grouting hole, keeping cooling the L-shaped pipe in the whole grouting process, applying pressure to the mortar inside the L-shaped pipe from one end of the L-shaped pipe funnel after 8-10 minutes, maintaining the pressure for 30-60 seconds, removing the L-shaped pipe, and quickly blocking a grout outlet; grouting all the grouting holes in sequence;
s5 curing
Spraying a curing agent for curing within 30 minutes after grouting; the prefabricated part can not be vibrated and impacted within 24 hours after grouting; and 2d later, the subsequent assembly construction can be carried out.
2. The construction method according to claim 1, characterized in that: the components of the grouting material in the step S3 are as follows: 30-60 parts of cement, 40-70 parts of aggregate, 1-5 parts of gypsum, 0.5-1.0 part of reinforced water reducing agent, 0.1-0.2 part of retarder, 1-3 parts of expanding agent, 0.005-0.007 part of aluminum powder mixture and 0.1-0.2 part of glass fiber; the reinforced water reducing agent is prepared by the following preparation method: selecting a polycarboxylate superplasticizer monomer (TPEG) as a macromonomer, Acrylic Acid (AA) as an active monomer, methacryloxypropyltriethoxysilane as an interface energy reducing monomer, Ammonium Persulfate (APS) as an initiator and sodium methallylsulfonate as a chain transfer agent, and preparing the reinforced superplasticizer at the temperature of 60 ℃, wherein the molar ratio of TPEG, Acrylic Acid (AA), methacryloxypropyltriethoxysilane, Ammonium Persulfate (APS) and sodium methallylsulfonate is 1: 2.5-4.7: 0.1-0.35: 0.08-0.17: 0.25-0.34.
3. The construction method according to claim 1, characterized in that: the cement consists of 75-85% of sulphoaluminate cement and 15-25% of Portland cement in percentage by mass; the aggregate is composed of quartz sand and river sand by mass percent of 40%, wherein the quartz sand comprises 28% of 6-10 meshes, 30% of 10-20 meshes and 42% of 20-40 meshes; the gypsum consists of 50% of dihydrate gypsum and 50% of phosphogypsum in percentage by mass.
4. The construction method according to claim 1, characterized in that: in the step S1, the diameter of the inner cavity of the sleeve is 10mm larger than the maximum outer diameter of the steel bar, and the length of the sleeve is 8d +20 mm; d is the maximum outer diameter of the steel bar.
5. The construction method according to claim 1, characterized in that: in the step S3, the mass ratio of the grouting material to the water is 1: 0.11-0.12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911410891.7A CN111101714B (en) | 2019-12-31 | 2019-12-31 | Grouting connection construction method for prefabricated components of fabricated building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911410891.7A CN111101714B (en) | 2019-12-31 | 2019-12-31 | Grouting connection construction method for prefabricated components of fabricated building |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111101714A true CN111101714A (en) | 2020-05-05 |
| CN111101714B CN111101714B (en) | 2021-01-26 |
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| CN201911410891.7A Active CN111101714B (en) | 2019-12-31 | 2019-12-31 | Grouting connection construction method for prefabricated components of fabricated building |
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Cited By (1)
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| CN115214008A (en) * | 2022-07-19 | 2022-10-21 | 四川建园新型建筑材料有限公司 | Production method of sintered combined wallboard integrating functions of plastering, grouting and bar planting |
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| CN111101714B (en) | 2021-01-26 |
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