CN108821670A - A kind of Reactive Powder Concrete and its production technology for pouring prefabricated components - Google Patents
A kind of Reactive Powder Concrete and its production technology for pouring prefabricated components Download PDFInfo
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- CN108821670A CN108821670A CN201810753350.3A CN201810753350A CN108821670A CN 108821670 A CN108821670 A CN 108821670A CN 201810753350 A CN201810753350 A CN 201810753350A CN 108821670 A CN108821670 A CN 108821670A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical Kinetics & Catalysis (AREA)
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- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to technical field of concrete, disclose a kind of Reactive Powder Concrete, and the quality with each component of cubic unit concrete content meter is：660~710kg of cement, 160~200kg of silicon ash, flyash 150kg~180kg, 1100~1160kg of quartz sand, steel fibre 100kg~120kg, water-reducing agent 18kg~22kg, water 180kg~200kg；The quality proportioning of ultra-fine grain diameter quartz sand, fine grain quartz sand and middle partial size quartz sand is 15-25:65-75:5-15.Also disclose the production technology that a kind of Reactive Powder Concrete pours prefabricated components, using the quartz sand of three kinds of partial sizes (whole partial size is partially thin), the gradation of quartz sand is more uniformly reasonable, the particle of different materials preferably can mutually wrap up and embedding reality, improve aggregate compactness, the mobility of Reactive Powder Concrete obtained is more preferable, and Reactive Powder Concrete pours prefabricated components with preferable flexural strength.
Description
Technical field
The invention belongs to technical field of concrete, and in particular to a kind of Reactive Powder Concrete and its pour prefabricated components
Production technology.
Background technique
Reactive Powder Concrete (Reactive Powder Concrete abbreviation RPC) is a kind of high-strength, high-performance coagulation
Soil, basic composition material have cement, mineral admixture, quartz sand, steel fibre, high efficiency water reducing agent and water.It prepares original substantially
Reason is：It prepares using maximal density theoretical model as foundation, using optimal grain composition, considers that intergranular physical chemistry is anti-
It answers, substantially reduces the defect (gap and microcrack) of material internal, improve inner microstructure, to obtain superelevation
Mechanical property and endurance quality.Reactive Powder Concrete component currently on the market has relative to ordinary concrete member performance
It is promoted, but its mechanical property is difficult to meet the requirements, and is also easy to produce crackle, product quality is difficult to ensure.
Summary of the invention
In order to solve the above problems existing in the present technology, it is an object of that present invention to provide a kind of Reactive Powder Concrete and
Its production technology for pouring prefabricated components.
The technical scheme adopted by the invention is as follows：
A kind of Reactive Powder Concrete, the quality with each component of cubic unit concrete content meter are：Cement 660~
710kg, 160~200kg of silicon ash, flyash 150kg~180kg, 1100~1160kg of quartz sand, steel fibre 100kg~
120kg, water-reducing agent 18kg~22kg, water 180kg~200kg；
Quartz sand is the quartz sand of three kinds of grain diameters, respectively：Partial size is 0.08mm~0.16mm ultra-fine grain diameter quartz
The middle partial size quartz sand that the fine grain quartz sand and partial size that sand, partial size are 0.17mm~0.315mm are 0.316~0.63mm surpasses
The quality proportioning of fine grain quartz sand, fine grain quartz sand and middle partial size quartz sand is 15-25:65-75:5-15.
Further, it is with the quality of each component of cubic unit concrete content meter：Cement 680kg, silicon ash 170kg,
Flyash 150kg, quartz sand 1160kg, steel fibre 100kg, water-reducing agent 20kg, water 190kg.
Further, cement 700kg, silicon ash 195kg, flyash 165kg, quartz sand 1100kg, steel fibre 115kg subtract
Aqua 22kg, water 185kg.
Further, the proportion of ultra-fine grain diameter quartz sand, fine grain quartz sand and middle partial size quartz sand is 20:70:10.
Further, the diameter of steel fibre is 0.18~0.22mm, and the length of steel fibre is 12~16mm.
Further, water-reducing agent is the polycarboxylate water-reducer that water-reducing rate is greater than 30%.
The invention also discloses the production technology for pouring prefabricated components using above-mentioned Reactive Powder Concrete, including it is following
Step：
(1) it feeds intake：Quartz sand and steel fibre are added into blender and carries out premixing, the premixing time is not less than 240s, then to
Cement, silicon ash and flyash are successively put into blender and carries out dry mixing, and the dry mixing time is not less than 120s；
(2) it stirs：Water-reducing agent and water are launched into blender, mixing time is not less than 180s, in blender spindle motor current
It keeps terminating stirring after stablizing；
(3) it transports：After stirring, it is discharged in hopper and hopper is transported at production line again；
(4) it pours：Hopper is adjusted to the surface of mold, hopper is opened, feeds intake and pour, it is desirable that under concrete is uniform
Material, the production line speed of service is unsuitable too fast, guarantees that the residence time is not less than 120s to every mold on a vibration table；
(5) it rests：Pour completion product covered with plastic film after be transported to steam-cured interior, rest 4h~6h, makes coagulation
Soil reaches or is up to initial set；
(6) steam-cured：It is passed through steam heating to steam-cured interior, heating rate is not more than 12 DEG C/h, after rising to 40 DEG C, keeps permanent
Temperature for 24 hours more than, then to cool down no more than the rate of temperature fall of 15 DEG C/h；
(7) it demoulds：When the product temperature of mold and step (6) be down to and the difference of room temperature be no more than 20 DEG C i.e. collapsible die；
(8) it supports eventually：Reactive Powder Concrete component is obtained after demoulding, carries out steam curing again, and heating rate is not more than 12
DEG C/h, after being warming up to 70 DEG C, constant temperature 48h or more is kept, then reactive powder coagulation is down to the cooling rate no more than 12 DEG C/h
Native component surface and circumstance of temperature difference are not more than 20 DEG C；
(9) natural curing：Reactive Powder Concrete component carries out natural curing after supporting eventually, and natural curing temperature answers height
In 10 DEG C, and keep Reactive Powder Concrete component surface 7 days or more wet.
Beneficial effects of the present invention are：
(1) due to using scientific Reactive Powder Concrete formula, make the Reactive Powder Concrete component of production more
Stablize, be not only able to satisfy the mechanical property requirements of its related superelevation, but also can effectively solve the problem of it is easily cracked；The present invention
Reactive Powder Concrete increase the dosage of quartz sand, and the gradation of fine aggregate is advanced optimized, using the stone of three kinds of partial sizes
Sand (whole partial size is partially thin), the gradation of quartz sand is more uniformly reasonable, and the particle of different materials preferably can be wrapped up mutually
And embedding reality, aggregate compactness is improved, then by preferred volume content of steel fibers, the mobility of Reactive Powder Concrete obtained is more
Good, Reactive Powder Concrete pours prefabricated components with preferable flexural strength, solves component problem of Cracking substantially.
(2) due to being mixed with certain flyash than column, the viscosity of Reactive Powder Concrete, mix mobility are reduced
Increase, concrete is more easily closely knit；The addition of high efficiency water reducing agent is so that water consumption reduction, is to guarantee Reactive Powder Concrete mechanics
The key factor of performance；Just feeding technique can shorten demoulding time, accelerate the production cycle, improve mould utilization factor；Feeding technique is filled eventually
The activity of silicon ash in mix is sent out in shunt excitation, and the mechanical property of Reactive Powder Concrete component is further promoted.
Specific embodiment
Further explaination is done to the present invention combined with specific embodiments below.
Cement is the PO42.5S cement of Hubei Yadong Cement Co., Ltd production, and silicon ash is that Shimian, Sichuan universe Sheng industry and trade has
Limit company provides to obtain silicon ash of the dioxide-containing silica 98%, and flyash is the level-one flyash of thermal power plant of Macheng, hubei Province city, stone
Sand is the quartz sand for three kinds of different gradations that Hubei Yun Ting quartz sand Co., Ltd provides, and steel fibre is Tengzhou Si Dashimisi
The steel fibre that metal product Co., Ltd provides, water-reducing agent are the water-reducing rate that Hubei Qi Jia building materials Science and Technology Ltd. provides, water
For drinking public water supply.
Embodiment 1：
The present embodiment provides a kind of Reactive Powder Concrete, with the quality of each component of cubic unit concrete content meter
For：Cement 680kg, silicon ash 170kg, flyash 150kg, quartz sand 1160kg, steel fibre 100kg, water-reducing agent 20kg, water
190kg.Wherein, the diameter of steel fibre is 0.18~0.22mm, and the length of steel fibre is 12~16mm；Water-reducing agent is that water-reducing rate is big
In 30% polycarboxylate water-reducer.
Wherein, quartz sand is the quartz sand of three kinds of grain diameters, respectively：Partial size is 0.08mm~0.16mm ultra-fine grain diameter
The middle partial size quartz that the fine grain quartz sand and partial size that quartz sand, partial size are 0.17mm~0.315mm are 0.316~0.63mm
Sand, the quality proportioning of ultra-fine grain diameter quartz sand, fine grain quartz sand and middle partial size quartz sand are 15-25:65-75:5-15.
Reactive Powder Concrete of the invention increases the dosage of quartz sand, and advanced optimizes the gradation of fine aggregate, adopts
With the quartz sand (whole partial size is partially thin) of three kinds of partial sizes, the gradation of quartz sand is more uniformly reasonable, and the particle of different materials can
Preferably mutual package and embedding reality, improve aggregate compactness.Pass through preferred volume content of steel fibers, reactive powder coagulation obtained again
The mobility of soil is more preferable, and Reactive Powder Concrete pours prefabricated components with preferable flexural strength (such as following table).
The quartz sand (0.08~0.63mm) of fine grain and the quartz sand (0.64~1.25mm) of coarse grain diameter prepare activity powder
The ingredient and flexural strength contrast table of last concrete
As seen from the above table, when preparing RPC with the quartz sand of fine grain, folk prescription sand using amount is big, and the gap between sand grains is small, needs
Less powder dosage can fill the gap between sand grains；When preparing RPC with big partial size quartz sand, folk prescription sand using amount is small, sand
The gap of intergranular is big, needs more powder amount that could fill the gap between sand grains.Respectively with the quartz sand of fine grain (0.08~
When 0.63mm) preparing RPC with the quartz sand of coarse grain diameter (0.64~1.25mm), in the case that other materials dosage is constant, use
The quartz sand of fine grain can enable the particle of different materials preferably mutually wrap up, embedding reality, improve aggregate compactness, be made
Reactive Powder Concrete pour prefabricated components with preferable flexural strength.
The production technology that prefabricated components are poured using above-mentioned Reactive Powder Concrete, is included the following steps：
(1) it feeds intake：Quartz sand and steel fibre are added into blender and carries out premixing, the premixing time is not less than 240s, then to
Cement, silicon ash and flyash are successively put into blender and carries out dry mixing, and the dry mixing time is not less than 120s；It is required that the above material metering
Error is not more than the 2% of theory of proportioning value.
(2) it stirs：Water-reducing agent and water are launched into blender, mixing time is not less than 180s, in blender spindle motor current
It keeps terminating stirring after stablizing.
(3) it transports：After stirring, it is discharged in hopper and hopper is transported at production line again；Waiting pours.
(4) it pours：Hopper is adjusted to the surface of mold, hopper is opened, feeds intake and pour, it is desirable that under concrete is uniform
Material, the production line speed of service is unsuitable too fast, guarantees that the residence time is not less than 120s to every mold on a vibration table.
(5) it rests：Pour completion product covered with plastic film after be transported to steam-cured interior, rest 4h~6h, makes coagulation
Soil reaches or is up to initial set；
(6) steam-cured：It is passed through steam heating to steam-cured interior, heating rate is not more than 12 DEG C/h, after rising to 40 DEG C, keeps permanent
Warm (40 ± 3 DEG C) for 24 hours more than, then cooled down with the rate of temperature fall no more than 15 DEG C/h；
(7) it demoulds：When the product temperature of mold and step (6) be down to and the difference of room temperature be no more than 20 DEG C i.e. collapsible die；
(8) it supports eventually：Reactive Powder Concrete component is obtained after demoulding, carries out steam curing again, and heating rate is not more than 12
DEG C/h, after being warming up to 70 DEG C, constant temperature (70 ± 5 DEG C) 48h or more is kept, then activity is down to the cooling rate no more than 12 DEG C/h
Powder concrete component surface and circumstance of temperature difference are not more than 20 DEG C；
(9) natural curing：Reactive Powder Concrete component carries out natural curing after supporting eventually, and natural curing temperature answers height
In 10 DEG C, and keep Reactive Powder Concrete component surface 7 days or more wet.When environment temperature is lower than 10 DEG C, it should take
Corresponding Insulation.Under natural curing (construction site curing condition), the compression strength of Reactive Powder Concrete component is average
Value is 132.7MPa, and flexural strength average value is 20.7MPa.
Embodiment 2：
The present embodiment provides a kind of Reactive Powder Concrete, with the quality of each component of cubic unit concrete content meter
For：Cement 700kg, silicon ash 195kg, flyash 165kg, quartz sand 1100kg, steel fibre 115kg, water-reducing agent 22kg, water
185kg.Wherein, the diameter of steel fibre is 0.18~0.22mm, and the length of steel fibre is 12~16mm；Water-reducing agent is that water-reducing rate is big
In 30% polycarboxylate water-reducer.
Wherein, quartz sand is the quartz sand of three kinds of grain diameters, respectively：Partial size is 0.08mm~0.16mm ultra-fine grain diameter
The middle partial size quartz that the fine grain quartz sand and partial size that quartz sand, partial size are 0.17mm~0.315mm are 0.316~0.63mm
Sand, the quality proportioning of ultra-fine grain diameter quartz sand, fine grain quartz sand and middle partial size quartz sand are 15-25:65-75:5-15.
Reactive Powder Concrete of the invention increases the dosage of quartz sand, and advanced optimizes the gradation of fine aggregate, adopts
With the quartz sand (whole partial size is partially thin) of three kinds of partial sizes, the gradation of quartz sand is more uniformly reasonable, and the particle of different materials can
Preferably mutual package and embedding reality, improve aggregate compactness.Pass through preferred volume content of steel fibers, reactive powder coagulation obtained again
The mobility of soil is more preferable, and Reactive Powder Concrete pours prefabricated components with preferable flexural strength.
The production technology that prefabricated components are poured using above-mentioned Reactive Powder Concrete, is included the following steps：
(1) it feeds intake：Quartz sand and steel fibre are added into blender and carries out premixing, the premixing time is not less than 240s, then to
Cement, silicon ash and flyash are successively put into blender and carries out dry mixing, and the dry mixing time is not less than 120s；It is required that the above material metering
Error is not more than the 2% of theory of proportioning value.
(2) it stirs：Water-reducing agent and water are launched into blender, mixing time is not less than 180s, in blender spindle motor current
It keeps terminating stirring after stablizing.
(3) it transports：After stirring, it is discharged in hopper and hopper is transported at production line again；Waiting pours.
(4) it pours：Hopper is adjusted to the surface of mold, hopper is opened, feeds intake and pour, it is desirable that under concrete is uniform
Material, the production line speed of service is unsuitable too fast, guarantees that the residence time is not less than 120s to every mold on a vibration table.
(5) it rests：Pour completion product covered with plastic film after be transported to steam-cured interior, rest 4h~6h, makes coagulation
Soil reaches or is up to initial set；
(6) steam-cured：It is passed through steam heating to steam-cured interior, heating rate is not more than 12 DEG C/h, after rising to 40 DEG C, keeps permanent
Warm (40 ± 3 DEG C) for 24 hours more than, then cooled down with the rate of temperature fall no more than 15 DEG C/h；
(7) it demoulds：When the product temperature of mold and step (6) be down to and the difference of room temperature be no more than 20 DEG C i.e. collapsible die；
(8) it supports eventually：Reactive Powder Concrete component is obtained after demoulding, carries out steam curing again, and heating rate is not more than 12
DEG C/h, after being warming up to 70 DEG C, constant temperature (70 ± 5 DEG C) 48h or more is kept, then activity is down to the cooling rate no more than 12 DEG C/h
Powder concrete component surface and circumstance of temperature difference are not more than 20 DEG C；
(9) natural curing：Reactive Powder Concrete component carries out natural curing after supporting eventually, and natural curing temperature answers height
In 10 DEG C, and keep Reactive Powder Concrete component surface 7 days or more wet.When environment temperature is lower than 10 DEG C, it should take
Corresponding Insulation.Under natural curing (construction site curing condition), the compression strength of Reactive Powder Concrete component is average
Value is 143.2MPa, and flexural strength average value is 24.6MPa.
Embodiment 3：
The present embodiment provides a kind of Reactive Powder Concrete, with the quality of each component of cubic unit concrete content meter
For：Cement 660kg, silicon ash 160kg, flyash 180kg, quartz sand 1130kg, steel fibre 110kg, water-reducing agent 18kg, water
195kg.Wherein, the diameter of steel fibre is 0.18~0.22mm, and the length of steel fibre is 12~16mm；Water-reducing agent is that water-reducing rate is big
In 30% polycarboxylate water-reducer.
Wherein, quartz sand is the quartz sand of three kinds of grain diameters, respectively：Partial size is 0.08mm~0.16mm ultra-fine grain diameter
The middle partial size quartz that the fine grain quartz sand and partial size that quartz sand, partial size are 0.17mm~0.315mm are 0.316~0.63mm
Sand, the quality proportioning of ultra-fine grain diameter quartz sand, fine grain quartz sand and middle partial size quartz sand are 15-25:65-75:5-15.
Reactive Powder Concrete of the invention increases the dosage of quartz sand, and advanced optimizes the gradation of fine aggregate, adopts
With the quartz sand (whole partial size is partially thin) of three kinds of partial sizes, the gradation of quartz sand is more uniformly reasonable, and the particle of different materials can
Preferably mutual package and embedding reality, improve aggregate compactness.Pass through preferred volume content of steel fibers, reactive powder coagulation obtained again
The mobility of soil is more preferable, and Reactive Powder Concrete pours prefabricated components with preferable flexural strength.
The production technology that prefabricated components are poured using above-mentioned Reactive Powder Concrete, is included the following steps：
(1) it feeds intake：Quartz sand and steel fibre are added into blender and carries out premixing, the premixing time is not less than 240s, then to
Cement, silicon ash and flyash are successively put into blender and carries out dry mixing, and the dry mixing time is not less than 120s；It is required that the above material metering
Error is not more than the 2% of theory of proportioning value.
(2) it stirs：Water-reducing agent and water are launched into blender, mixing time is not less than 180s, in blender spindle motor current
It keeps terminating stirring after stablizing.
(3) it transports：After stirring, it is discharged in hopper and hopper is transported at production line again；Waiting pours.
(4) it pours：Hopper is adjusted to the surface of mold, hopper is opened, feeds intake and pour, it is desirable that under concrete is uniform
Material, the production line speed of service is unsuitable too fast, guarantees that the residence time is not less than 120s to every mold on a vibration table.
(5) it rests：Pour completion product covered with plastic film after be transported to steam-cured interior, rest 4h~6h, makes coagulation
Soil reaches or is up to initial set；
(6) steam-cured：It is passed through steam heating to steam-cured interior, heating rate is not more than 12 DEG C/h, after rising to 40 DEG C, keeps permanent
Warm (40 ± 3 DEG C) for 24 hours more than, then cooled down with the rate of temperature fall no more than 15 DEG C/h；
(7) it demoulds：When the product temperature of mold and step (6) be down to and the difference of room temperature be no more than 20 DEG C i.e. collapsible die；
(8) it supports eventually：Reactive Powder Concrete component is obtained after demoulding, carries out steam curing again, and heating rate is not more than 12
DEG C/h, after being warming up to 70 DEG C, constant temperature (70 ± 5 DEG C) 48h or more is kept, then activity is down to the cooling rate no more than 12 DEG C/h
Powder concrete component surface and circumstance of temperature difference are not more than 20 DEG C；
(9) natural curing：Reactive Powder Concrete component carries out natural curing after supporting eventually, and natural curing temperature answers height
In 10 DEG C, and keep Reactive Powder Concrete component surface 7 days or more wet.When environment temperature is lower than 10 DEG C, it should take
Corresponding Insulation.Under natural curing (construction site curing condition), the compression strength of Reactive Powder Concrete component is average
Value is 122.4MPa, and flexural strength average value is 21.5MPa.
Embodiment 4：
The present embodiment provides a kind of Reactive Powder Concrete, with the quality of each component of cubic unit concrete content meter
For：Cement 710kg, silicon ash 200kg, flyash 170kg, quartz sand 1140kg, steel fibre 105kg, water-reducing agent 19kg, water
200kg.Wherein, the diameter of steel fibre is 0.18~0.22mm, and the length of steel fibre is 12~16mm；Water-reducing agent is that water-reducing rate is big
In 30% polycarboxylate water-reducer.
Wherein, quartz sand is the quartz sand of three kinds of grain diameters, respectively：Partial size is 0.08mm~0.16mm ultra-fine grain diameter
The middle partial size quartz that the fine grain quartz sand and partial size that quartz sand, partial size are 0.17mm~0.315mm are 0.316~0.63mm
Sand, the quality proportioning of ultra-fine grain diameter quartz sand, fine grain quartz sand and middle partial size quartz sand are 15-25:65-75:5-15.
Reactive Powder Concrete of the invention increases the dosage of quartz sand, and advanced optimizes the gradation of fine aggregate, adopts
With the quartz sand (whole partial size is partially thin) of three kinds of partial sizes, the gradation of quartz sand is more uniformly reasonable, and the particle of different materials can
Preferably mutual package and embedding reality, improve aggregate compactness.Pass through preferred volume content of steel fibers, reactive powder coagulation obtained again
The mobility of soil is more preferable, and Reactive Powder Concrete pours prefabricated components with preferable flexural strength.
The production technology that prefabricated components are poured using above-mentioned Reactive Powder Concrete, is included the following steps：
(1) it feeds intake：Quartz sand and steel fibre are added into blender and carries out premixing, the premixing time is not less than 240s, then to
Cement, silicon ash and flyash are successively put into blender and carries out dry mixing, and the dry mixing time is not less than 120s；It is required that the above material metering
Error is not more than the 2% of theory of proportioning value.
(2) it stirs：Water-reducing agent and water are launched into blender, mixing time is not less than 180s, in blender spindle motor current
It keeps terminating stirring after stablizing.
(3) it transports：After stirring, it is discharged in hopper and hopper is transported at production line again；Waiting pours.
(4) it pours：Hopper is adjusted to the surface of mold, hopper is opened, feeds intake and pour, it is desirable that under concrete is uniform
Material, the production line speed of service is unsuitable too fast, guarantees that the residence time is not less than 120s to every mold on a vibration table.
(5) it rests：Pour completion product covered with plastic film after be transported to steam-cured interior, rest 4h~6h, makes coagulation
Soil reaches or is up to initial set；
(6) steam-cured：It is passed through steam heating to steam-cured interior, heating rate is not more than 12 DEG C/h, after rising to 40 DEG C, keeps permanent
Warm (40 ± 3 DEG C) for 24 hours more than, then cooled down with the rate of temperature fall no more than 15 DEG C/h；
(7) it demoulds：When the product temperature of mold and step (6) be down to and the difference of room temperature be no more than 20 DEG C i.e. collapsible die；
(8) it supports eventually：Reactive Powder Concrete component is obtained after demoulding, carries out steam curing again, and heating rate is not more than 12
DEG C/h, after being warming up to 70 DEG C, constant temperature (70 ± 5 DEG C) 48h or more is kept, then activity is down to the cooling rate no more than 12 DEG C/h
Powder concrete component surface and circumstance of temperature difference are not more than 20 DEG C；
(9) natural curing：Reactive Powder Concrete component carries out natural curing after supporting eventually, and natural curing temperature answers height
In 10 DEG C, and keep Reactive Powder Concrete component surface 7 days or more wet.When environment temperature is lower than 10 DEG C, it should take
Corresponding Insulation.Under natural curing (construction site curing condition), the compression strength of Reactive Powder Concrete component is average
Value is 138.5MPa, and flexural strength average value is 22.4MPa.
The present invention is not limited to above-mentioned optional embodiment, anyone can show that other are each under the inspiration of the present invention
The product of kind form.Above-mentioned specific embodiment should not be understood the limitation of pairs of protection scope of the present invention, protection of the invention
Range should be subject to be defined in claims, and specification can be used for interpreting the claims.
Claims (7)
1. a kind of Reactive Powder Concrete, it is characterised in that：Quality with each component of cubic unit concrete content meter is：Water
660~710kg of mud, 160~200kg of silicon ash, flyash 150kg~180kg, 1100~1160kg of quartz sand, steel fibre 100kg
~120kg, water-reducing agent 18kg~22kg, water 180kg~200kg；
Quartz sand is the quartz sand of three kinds of grain diameters, respectively：Partial size is 0.08mm~0.16mm ultra-fine grain diameter quartz sand, grain
The middle partial size quartz sand that the fine grain quartz sand and partial size that diameter is 0.17mm~0.315mm are 0.316~0.63mm, ultra-fine grain diameter
The quality proportioning of quartz sand, fine grain quartz sand and middle partial size quartz sand is 15-25:65-75:5-15.
2. Reactive Powder Concrete according to claim 1, it is characterised in that：With each of cubic unit concrete content meter
The quality of component is：Cement 680kg, silicon ash 170kg, flyash 150kg, quartz sand 1160kg, steel fibre 100kg, water-reducing agent
20kg, water 190kg.
3. Reactive Powder Concrete according to claim 1, it is characterised in that：With each of cubic unit concrete content meter
The quality of component is：Cement 700kg, silicon ash 195kg, flyash 165kg, quartz sand 1100kg, steel fibre 115kg, water-reducing agent
22kg, water 185kg.
4. Reactive Powder Concrete according to claim 1, it is characterised in that：Ultra-fine grain diameter quartz sand, fine grain quartz
The proportion of sand and middle partial size quartz sand is 20:70:10.
5. Reactive Powder Concrete described in any one of -4 claims according to claim 1, it is characterised in that：Steel fibre it is straight
Diameter is 0.18~0.22mm, and the length of steel fibre is 12~16mm.
6. Reactive Powder Concrete according to claim 5, it is characterised in that：Water-reducing agent is that water-reducing rate is poly- greater than 30%
Carboxylic acid water reducer.
7. a kind of production technology for pouring prefabricated components using Reactive Powder Concrete as claimed in claim 6, which is characterized in that
Include the following steps：
(1) it feeds intake：Quartz sand and steel fibre are added into blender and carries out premixing, the premixing time is not less than 240s, then to stirring
Cement, silicon ash and flyash are successively put into machine and carries out dry mixing, and the dry mixing time is not less than 120s；
(2) it stirs：Water-reducing agent and water are launched into blender, mixing time is not less than 180s, keeps in blender spindle motor current
Terminate stirring after stabilization；
(3) it transports：After stirring, it is discharged in hopper and hopper is transported at production line again；
(4) it pours：Hopper is adjusted to the surface of mold, hopper is opened, feeds intake and pour, it is desirable that the uniform blanking of concrete, it is raw
The producing line speed of service is unsuitable too fast, guarantees that the residence time is not less than 120s to every mold on a vibration table；
(5) it rests：Pour completion product covered with plastic film after be transported to steam-cured interior, rest 4h~6h, reaches concrete
To or be up to initial set；
(6) steam-cured：It is passed through steam heating to steam-cured interior, heating rate is not more than 12 DEG C/h, after rising to 40 DEG C, keeps constant temperature
More than for 24 hours, then to cool down no more than the rate of temperature fall of 15 DEG C/h；
(7) it demoulds：When the product temperature of mold and step (6) be down to and the difference of room temperature be no more than 20 DEG C i.e. collapsible die；
(8) it supports eventually：Reactive Powder Concrete component is obtained after demoulding, carries out steam curing again, heating rate is not more than 12 DEG C/h,
After being warming up to 70 DEG C, constant temperature 48h or more is kept, then Reactive Powder Concrete component is down to the cooling rate no more than 12 DEG C/h
Surface and circumstance of temperature difference are not more than 20 DEG C；
(9) natural curing：Reactive Powder Concrete component carries out natural curing after supporting eventually, and natural curing temperature should be higher than that 10
DEG C, and keep Reactive Powder Concrete component surface 7 days or more wet.
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| CN110407608A (en) * | 2019-06-13 | 2019-11-05 | 安徽宝格丽新型装饰材料科技有限公司 | A kind of inorganic quartzite slate maintaining process |
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| CN113233836A (en) * | 2021-05-18 | 2021-08-10 | 苏州市星火管片有限公司 | Reactive powder concrete and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249861A (en) * | 2018-02-07 | 2018-07-06 | 汝州郑铁三佳水泥制品有限公司 | A kind of high-speed railway Reactive Powder Concrete prefabricated components and preparation method thereof |
-
2018
- 2018-07-10 CN CN201810753350.3A patent/CN108821670A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249861A (en) * | 2018-02-07 | 2018-07-06 | 汝州郑铁三佳水泥制品有限公司 | A kind of high-speed railway Reactive Powder Concrete prefabricated components and preparation method thereof |
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| CN112194424A (en) * | 2020-07-16 | 2021-01-08 | 苏州混凝土水泥制品研究院有限公司 | Ultrahigh-performance concrete with higher flexural strength and preparation method thereof |
| CN111958753A (en) * | 2020-08-20 | 2020-11-20 | 金隅住宅产业化(唐山)有限公司 | Preparation method of decorative external wall panel and decorative external wall panel obtained by preparation method |
| CN113233836A (en) * | 2021-05-18 | 2021-08-10 | 苏州市星火管片有限公司 | Reactive powder concrete and preparation method thereof |
| CN113666699A (en) * | 2021-08-18 | 2021-11-19 | 苏州如轶新材料科技有限公司 | Fire-resistant super-performance concrete and preparation method and preparation equipment thereof |
| CN113860814A (en) * | 2021-09-18 | 2021-12-31 | 沈阳工业大学 | Copper tailing powder active powder concrete and preparation method thereof |
| CN113982593A (en) * | 2021-11-08 | 2022-01-28 | 安徽理工大学 | Ultrahigh-strength well drilling well wall and method for manufacturing ultrahigh-strength well drilling well wall |
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