CN108439881A - A kind of preparation method of high performance concrete - Google Patents
A kind of preparation method of high performance concrete Download PDFInfo
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- CN108439881A CN108439881A CN201810397614.6A CN201810397614A CN108439881A CN 108439881 A CN108439881 A CN 108439881A CN 201810397614 A CN201810397614 A CN 201810397614A CN 108439881 A CN108439881 A CN 108439881A
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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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- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
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- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of preparation method of high performance concrete, the high performance concrete is made of cement, flyash, silica flour, tap water, early strength agent, air-entrainment, waterproofing agent, quartz sand, swelling agent, mineral admixture, high efficiency water reducing agent, fiber, miberal powder.The preparation method of the high performance concrete, it is dispersed into numerous single fiber by fiber after stirring, these fibers are in each to being uniformly distributed in entire high performance concrete, make the reinforcement that high performance concrete is assisted, to prevent contraction fissure, also it can minimize width and length that the high performance concrete in the case where there is state of strength is likely to occur crack, improve the tensile strength of the high performance concrete；The preparation method of the high performance concrete can lower the ratio of mud by the way that high efficiency water reducing agent is added in concrete, improve the density of concrete, improve the intensity of concrete, impervious and resistance to chemical corrosion, to improve durability of HPC with high.
Description
Technical field
The present invention relates to building material technical field, specially a kind of preparation method of high performance concrete.
Background technology
Economic continuous development has driven construction industry rapid development, and concrete is maximum as modern construction engineering dosage
One of construction material is widely used in industry and civil buildings, gives who and drainage system, ground surface works and underground engineering, national defence
Build etc., the growth that the demand in all kinds of buildings is advanced by leaps and bounds, according to the preliminary statistics, Chinese commodity concrete sale in 09 year
Total amount about 7.9 billion cubic meters, in face of so high concrete sales volume, the various raw material supplies of concrete are more and more nervous.
Requirement with people to building trade security performance constantly improves, so construction material used when to building
Also stringent to improve, and existing concrete is there are durability is poor, tensile strength is low, and deformability is poor when tension, is easy cracking
The problem of.
Invention content
(1) the technical issues of solving
In view of the deficiencies of the prior art, it the present invention provides a kind of preparation method of high performance concrete, solves existing
Concrete that there are durabilities is poor, tensile strength is low, and deformability is poor when tension, the problem of being easy cracking.
(2) technical solution
To achieve the above object, the present invention provides the following technical solutions：A kind of preparation method of high performance concrete, it is described
High performance concrete is by cement, flyash, silica flour, tap water, early strength agent, air-entrainment, waterproofing agent, quartz sand, swelling agent, mine
Polymer blends material, high efficiency water reducing agent, fiber, miberal powder composition, the preparation of high performance concrete include the following steps：
The first step：Selection prepares the instrument of high performance concrete
Select a clean and tidy workbench, on the table placement that it is required to prepare high performance concrete in laboratory
Equipment and instrument, such as blender, shake table, electronic scale, hopper, charging ladle；
Second step：It weighs raw material and selects the proportioning of raw material
Using electronic scale and weighing cup weigh cement 500-1000g, flyash 500-1000g, quartz sand 800-1000g,
Then silica flour 400-600g, miberal powder 500-700g prepare the tap water of 1-5L again, then weigh flyash 500-600g, efficiently again
Water-reducing agent 0.5-0.8L, early strength agent 0.5-0.8L, air-entrainment 0.5-0.8L, waterproofing agent 0.5-0.7L, swelling agent 0.7-0.8L, mine
Polymer blends agent 0.5-0.6L, fiber 500-1000g；
Third walks：Prepare high performance concrete
Cement, flyash, quartz sand, silica flour, miberal powder and tap water after weighing is poured by material mouth in blender, is beaten
Blender is opened, stirs 5-10 minutes, blender is made to be stirred mixing to the raw material of the inside, makes to mix between raw material
It is even, be then added again into blender load weighted flyash, early strength agent, air-entrainment, waterproofing agent, swelling agent, mineral adulterant,
Then fiber and certain mass score are stirred for 10-20 minutes dissolved with the water 3-7L of high efficiency water reducing agent, then fall mixture
Enter in charging ladle；
4th step：Vibrations cooling is carried out to high performance concrete
Charging ladle is placed on a vibration table, shake table is then opened, vibrations close shake table after 10-20 minutes, then
High performance concrete is cooled down with freezing machine, cooling time is 20 minutes.
Preferably, the blender is 6 minutes to the time that raw material are stirred, and the time of second of stirring is 15 points
Clock.
Preferably, the cement weighs 700g, and flyash weighs 700g, and quartz sand weighs 850g, and silica flour weighs 500g, mine
Powder weighs 650g, and then tap water weighs 3L.
Preferably, the flyash weighs 550g, and high efficiency water reducing agent weighs 0.8L, and early strength agent weighs 0.6L, and air-entrainment claims
0.7L is measured, waterproofing agent weighs 0.5L, and swelling agent weighs 0.8L, and mineral adulterant weighs 0.5L, and fiber weighs 600g.
Preferably, the weighing high efficiency water reducing agent 5L, and the mass fraction of high efficiency water reducing agent is 80%.
Preferably, the shake table is 15 minutes to the vibrations time of shaking of charging ladle, and the cooling time is 20 minutes.
(3) advantageous effect
The present invention provides a kind of preparation methods of high performance concrete, have following advantageous effect：
(1) preparation method of the high performance concrete, by the way that fiber is added in concrete, agitated rear fiber is dispersed into
Numerous single fiber, these fibers are in each to entire high performance concrete is uniformly distributed in, and so that high performance concrete is obtained auxiliary
The reinforcement helped can also minimize the high performance concrete in the case where there is state of strength and be likely to occur and split to prevent contraction fissure
The width and length of seam, improve the tensile strength of the high performance concrete.
(2) preparation method of the high performance concrete can lower water ash by the way that high efficiency water reducing agent is added in concrete
Than improving the density of concrete, improving the intensity of concrete, impervious and resistance to chemical corrosion is mixed to improve high-performance
Solidifying soil durability.
Specific implementation mode
Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
The present invention provides a kind of technical solution：A kind of preparation method of high performance concrete, high performance concrete are by water
Mud, flyash, silica flour, tap water, early strength agent, air-entrainment, waterproofing agent, quartz sand, swelling agent, mineral admixture, efficient diminishing
Agent, fiber, miberal powder composition, the preparation of high performance concrete include the following steps：
The first step：Selection prepares the instrument of high performance concrete
Select a clean and tidy workbench, on the table placement that it is required to prepare high performance concrete in laboratory
Equipment and instrument, such as blender, shake table, electronic scale, hopper, charging ladle；
Second step：It weighs raw material and selects the proportioning of raw material
Using electronic scale and weighing cup weigh cement 500-1000g, flyash 500-1000g, quartz sand 800-1000g,
Then silica flour 400-600g, miberal powder 500-700g prepare the tap water of 1-5L again, then weigh flyash 500-600g, efficiently again
Water-reducing agent 0.5-0.8L, early strength agent 0.5-0.8L, air-entrainment 0.5-0.8L, waterproofing agent 0.5-0.7L, swelling agent 0.7-0.8L, mine
Polymer blends agent 0.5-0.6L, fiber 500-1000g；
Third walks：Prepare high performance concrete
Cement, flyash, quartz sand, silica flour, miberal powder and tap water after weighing is poured by material mouth in blender, is beaten
Blender is opened, stirs 5-10 minutes, blender is made to be stirred mixing to the raw material of the inside, makes to mix between raw material
It is even, be then added again into blender load weighted flyash, early strength agent, air-entrainment, waterproofing agent, swelling agent, mineral adulterant,
Then fiber and certain mass score are stirred for 10-20 minutes dissolved with the water 3-7L of high efficiency water reducing agent, then fall mixture
Enter in charging ladle；
4th step：Vibrations cooling is carried out to high performance concrete
Charging ladle is placed on a vibration table, shake table is then opened, vibrations close shake table after 10-20 minutes, then
High performance concrete is cooled down with freezing machine, cooling time is 20 minutes.
Blender is 6 minutes to the time that raw material are stirred, and the time of second of stirring is 15 minutes, and cement weighs
700g, flyash weigh 700g, and quartz sand weighs 850g, and silica flour weighs 500g, and miberal powder weighs 650g, and then tap water weighs
3L, flyash weigh 550g, and high efficiency water reducing agent weighs 0.8L, and early strength agent weighs 0.6L, and air-entrainment weighs 0.7L, and waterproofing agent weighs
0.5L, swelling agent weigh 0.8L, and mineral adulterant weighs 0.5L, and fiber weighs 600g, weighs high efficiency water reducing agent 5L, and efficiently subtract
The mass fraction of aqua is 80%, and shake table is 15 minutes to the vibrations time of shaking of charging ladle, and cooling time is 20 minutes.
Embodiment 1
A kind of preparation method of high performance concrete, it is characterised in that：The high performance concrete is by cement, fine coal
Ash, silica flour, tap water, early strength agent, air-entrainment, waterproofing agent, quartz sand, swelling agent, mineral admixture, high efficiency water reducing agent, fiber,
Miberal powder forms, and the preparation of high performance concrete includes the following steps：
The first step：Selection prepares the instrument of high performance concrete
Select a clean and tidy workbench, on the table placement that it is required to prepare high performance concrete in laboratory
Equipment and instrument, such as blender, shake table, electronic scale, hopper, charging ladle；
Second step：It weighs raw material and selects the proportioning of raw material
Using electronic scale and weighing cup weigh cement 1000-1500g, flyash 400-800g, quartz sand 800-1000g,
Then silica flour 400-600g, miberal powder 500-700g prepare the tap water of 1-5L again, then weigh flyash 500-600g, efficiently again
Water-reducing agent 0.5-0.8L, early strength agent 0.5-0.8L, air-entrainment 0.5-0.8L, waterproofing agent 0.5-0.7L, swelling agent 0.7-0.8L, mine
Polymer blends agent 0.5-0.6L, fiber 500-1000g；
Third walks：Prepare high performance concrete
Cement, flyash, quartz sand, silica flour, miberal powder and tap water after weighing is poured by material mouth in blender, is beaten
Blender is opened, stirs 5-10 minutes, blender is made to be stirred mixing to the raw material of the inside, makes to mix between raw material
It is even, be then added again into blender load weighted flyash, early strength agent, air-entrainment, waterproofing agent, swelling agent, mineral adulterant,
Then fiber and certain mass score are stirred for 10-20 minutes dissolved with the water 3-7L of high efficiency water reducing agent, then fall mixture
Enter in charging ladle；
4th step：Vibrations cooling is carried out to high performance concrete
Charging ladle is placed on a vibration table, shake table is then opened, vibrations close shake table after 10-20 minutes, then
High performance concrete is cooled down with freezing machine, cooling time is 20 minutes.
Embodiment 2
A kind of preparation method of high performance concrete, it is characterised in that：The high performance concrete is by cement, fine coal
Ash, silica flour, tap water, early strength agent, air-entrainment, waterproofing agent, quartz sand, swelling agent, mineral admixture, high efficiency water reducing agent, fiber,
Miberal powder forms, and the preparation of high performance concrete includes the following steps：
The first step：Selection prepares the instrument of high performance concrete
Select a clean and tidy workbench, on the table placement that it is required to prepare high performance concrete in laboratory
Equipment and instrument, such as blender, shake table, electronic scale, hopper, charging ladle；
Second step：It weighs raw material and selects the proportioning of raw material
Using electronic scale and weighing cup weigh cement 500-1000g, flyash 500-1000g, quartz sand 800-1000g,
Then silica flour 400-600g, miberal powder 500-700g prepare the tap water of 1-5L again, then weigh flyash 500-600g, efficiently again
Water-reducing agent 0.5-0.8L, early strength agent 0.5-0.8L, air-entrainment 0.5-0.8L, waterproofing agent 0.5-0.7L, swelling agent 0.7-0.8L, mine
Polymer blends agent 0.5-0.6L, fiber 500-1000g；
Third walks：Prepare high performance concrete
Cement, flyash, quartz sand, silica flour, miberal powder and tap water after weighing is poured by material mouth in blender, is beaten
Blender is opened, stirs 15-20 minutes, blender is made to be stirred mixing to the raw material of the inside, makes to mix between raw material
It is even, be then added again into blender load weighted flyash, early strength agent, air-entrainment, waterproofing agent, swelling agent, mineral adulterant,
Then fiber and certain mass score are stirred for 10-20 minutes dissolved with the water 3-7L of high efficiency water reducing agent, then fall mixture
Enter in charging ladle；
4th step：Vibrations cooling is carried out to high performance concrete
Charging ladle is placed on a vibration table, shake table is then opened, vibrations close shake table after 10-20 minutes, then
High performance concrete is cooled down with freezing machine, cooling time is 20 minutes.
Embodiment 3
A kind of preparation method of high performance concrete, it is characterised in that：The high performance concrete is by cement, fine coal
Ash, silica flour, tap water, early strength agent, air-entrainment, waterproofing agent, quartz sand, swelling agent, mineral admixture, high efficiency water reducing agent, fiber,
Miberal powder forms, and the preparation of high performance concrete includes the following steps：
The first step：Selection prepares the instrument of high performance concrete
Select a clean and tidy workbench, on the table placement that it is required to prepare high performance concrete in laboratory
Equipment and instrument, such as blender, shake table, electronic scale, hopper, charging ladle；
Second step：It weighs raw material and selects the proportioning of raw material
Using electronic scale and weighing cup weigh cement 500-1000g, flyash 500-1000g, quartz sand 800-1000g,
Then silica flour 400-600g, miberal powder 500-700g prepare the tap water of 1-5L again, then weigh flyash 500-600g, efficiently again
Water-reducing agent 0.5-0.8L, early strength agent 0.5-0.8L, air-entrainment 0.5-0.8L, waterproofing agent 0.5-0.7L, swelling agent 0.7-0.8L, mine
Polymer blends agent 0.5-0.6L, fiber 500-1000g；
Third walks：Prepare high performance concrete
Cement, flyash, quartz sand, silica flour, miberal powder and tap water after weighing is poured by material mouth in blender, is beaten
Blender is opened, stirs 5-10 minutes, blender is made to be stirred mixing to the raw material of the inside, makes to mix between raw material
It is even, be then added again into blender load weighted flyash, early strength agent, air-entrainment, waterproofing agent, swelling agent, mineral adulterant,
Then fiber and certain mass score are stirred for 10-20 minutes, then pour the mixture into dissolved with the water 10L of high efficiency water reducing agent
In charging ladle；
4th step：Vibrations cooling is carried out to high performance concrete
Charging ladle is placed on a vibration table, shake table is then opened, vibrations close shake table after 10-20 minutes, then
High performance concrete is cooled down with freezing machine, cooling time is 20 minutes.
Embodiment 4
A kind of preparation method of high performance concrete, it is characterised in that：The high performance concrete is by cement, fine coal
Ash, silica flour, tap water, early strength agent, air-entrainment, waterproofing agent, quartz sand, swelling agent, mineral admixture, high efficiency water reducing agent, fiber,
Miberal powder forms, and the preparation of high performance concrete includes the following steps：
The first step：Selection prepares the instrument of high performance concrete
Select a clean and tidy workbench, on the table placement that it is required to prepare high performance concrete in laboratory
Equipment and instrument, such as blender, shake table, electronic scale, hopper, charging ladle；
Second step：It weighs raw material and selects the proportioning of raw material
Using electronic scale and weighing cup weigh cement 500-1000g, flyash 500-1000g, quartz sand 800-1000g,
Then silica flour 400-600g, miberal powder 500-700g prepare the tap water of 1-5L again, then weigh flyash 500-600g, efficiently again
Water-reducing agent 0.5-0.8L, early strength agent 0.5-0.8L, air-entrainment 0.5-0.8L, waterproofing agent 0.5-0.7L, swelling agent 0.7-0.8L, mine
Polymer blends agent 0.5-0.6L, fiber 500-1000g；
Third walks：Prepare high performance concrete
Cement, flyash, quartz sand, silica flour, miberal powder and tap water after weighing is poured by material mouth in blender, is beaten
Blender is opened, stirs 5-10 minutes, blender is made to be stirred mixing to the raw material of the inside, makes to mix between raw material
It is even, be then added again into blender load weighted flyash, early strength agent, air-entrainment, waterproofing agent, swelling agent, mineral adulterant,
Then fiber and certain mass score are stirred for 10-20 minutes dissolved with the water 3-7L of high efficiency water reducing agent, then fall mixture
Enter in charging ladle；
4th step：Vibrations cooling is carried out to high performance concrete
Charging ladle is placed on a vibration table, then opens shake table, shake table is closed in vibrations after five minutes, then with cold
Solidifying machine cools down high performance concrete, and cooling time is 10 minutes.
In conclusion the preparation method of the high performance concrete, by the way that fiber, agitated rear fiber are added in concrete
It is dispersed into numerous single fiber, these fibers are in each to entire high performance concrete is uniformly distributed in, and make high performance concrete
The reinforcement assisted, to prevent contraction fissure, can also minimize the high performance concrete in the case where there is state of strength may
The width and length for crack occur, improve the tensile strength of the high performance concrete, are efficiently subtracted by being added in concrete
Aqua can lower the ratio of mud, improve the density of concrete, improve the intensity of concrete, impermeability and resistance to chemical corrosion, from
And improve durability of HPC with high；Solve existing concrete there are durabilities poor, tensile strength is low, tension time-varying
Shape energy force difference, the problem of being easy to crack.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of preparation method of high performance concrete, it is characterised in that：The high performance concrete be by cement, flyash,
Silica flour, tap water, early strength agent, air-entrainment, waterproofing agent, quartz sand, swelling agent, mineral admixture, high efficiency water reducing agent, fiber, mine
Powder forms, and the preparation of high performance concrete includes the following steps：
The first step：Selection prepares the instrument of high performance concrete
A clean and tidy workbench, on the table placement is selected to prepare the required equipment of high performance concrete in laboratory
Instrument, such as blender, shake table, electronic scale, hopper, charging ladle；
Second step：It weighs raw material and selects the proportioning of raw material
Cement 500-1000g, flyash 500-1000g, quartz sand 800-1000g, silica flour are weighed using electronic scale and weighing cup
Then 400-600g, miberal powder 500-700g prepare the tap water of 1-5L again, then weigh flyash 500-600g, efficient diminishing again
Agent 0.5-0.8L, early strength agent 0.5-0.8L, air-entrainment 0.5-0.8L, waterproofing agent 0.5-0.7L, swelling agent 0.7-0.8L, mineral are mixed
Mixture 0.5-0.6L, fiber 500-1000g；
Third walks：Prepare high performance concrete
Cement, flyash, quartz sand, silica flour, miberal powder and tap water after weighing is poured by material mouth in blender, opening is stirred
Machine is mixed, stirs 5-10 minutes, blender is made to be stirred mixing to the raw material of the inside, makes to be uniformly mixed between raw material, so
Be added again into blender afterwards load weighted flyash, early strength agent, air-entrainment, waterproofing agent, swelling agent, mineral adulterant, fiber,
With certain mass score dissolved with the water 3-7L of high efficiency water reducing agent, then it is stirred for 10-20 minutes, then pours the mixture into charging
In bucket；
4th step：Vibrations cooling is carried out to high performance concrete
Charging ladle is placed on a vibration table, then opens shake table, vibrations close shake table after 10-20 minutes, then with cold
Solidifying machine cools down high performance concrete, and cooling time is 20 minutes.
2. a kind of preparation method of high performance concrete according to claim 1, it is characterised in that：The blender is to original
The time that material is stirred is 6 minutes, and the time of second of stirring is 15 minutes.
3. a kind of preparation method of high performance concrete according to claim 1, it is characterised in that：The cement weighs
700g, flyash weigh 700g, and quartz sand weighs 850g, and silica flour weighs 500g, and miberal powder weighs 650g, and then tap water weighs
3L。
4. a kind of preparation method of high performance concrete according to claim 1, it is characterised in that：The flyash weighs
550g, high efficiency water reducing agent weigh 0.8L, and early strength agent weighs 0.6L, and air-entrainment weighs 0.7L, and waterproofing agent weighs 0.5L, and swelling agent claims
0.8L is measured, mineral adulterant weighs 0.5L, and fiber weighs 600g.
5. a kind of preparation method of high performance concrete according to claim 1, it is characterised in that：The weighing efficiently subtracts
Aqua 5L, and the mass fraction of high efficiency water reducing agent is 80%.
6. a kind of preparation method of high performance concrete according to claim 1, it is characterised in that：The shake table is to dress
The vibrations time of shaking of charging basket is 15 minutes, and the cooling time is 20 minutes.
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| CN201810397614.6A CN108439881A (en) | 2018-04-28 | 2018-04-28 | A kind of preparation method of high performance concrete |
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ID=63201902
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109824330A (en) * | 2019-03-29 | 2019-05-31 | 江苏宇航建材科技有限公司 | A kind of high-performance middle-and-low strength concrete |
| CN112408884A (en) * | 2020-11-25 | 2021-02-26 | 北京城建九混凝土有限公司 | Impervious concrete and preparation method thereof |
| CN112500059A (en) * | 2020-12-22 | 2021-03-16 | 中意世兴实业(武汉)有限公司 | Recycled concrete and preparation method thereof |
| CN115504726A (en) * | 2022-09-20 | 2022-12-23 | 安徽理工大学 | Preparation method of slow-release hydrophobic microcapsule and hydrophobic concrete |
-
2018
- 2018-04-28 CN CN201810397614.6A patent/CN108439881A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109824330A (en) * | 2019-03-29 | 2019-05-31 | 江苏宇航建材科技有限公司 | A kind of high-performance middle-and-low strength concrete |
| CN112408884A (en) * | 2020-11-25 | 2021-02-26 | 北京城建九混凝土有限公司 | Impervious concrete and preparation method thereof |
| CN112500059A (en) * | 2020-12-22 | 2021-03-16 | 中意世兴实业(武汉)有限公司 | Recycled concrete and preparation method thereof |
| CN115504726A (en) * | 2022-09-20 | 2022-12-23 | 安徽理工大学 | Preparation method of slow-release hydrophobic microcapsule and hydrophobic concrete |
| CN115504726B (en) * | 2022-09-20 | 2023-09-08 | 安徽理工大学 | Preparation method of slow-release hydrophobic microcapsule and hydrophobic concrete |
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Effective date of registration: 20191225 Address after: 233000 Taoyuan new village, high speed railway, Longzihu District, Bengbu City, Anhui Province Applicant after: Wang Huisheng Address before: 241000 C1, room four, youth Pioneer Park, Wuhu road advertising industrial park, Jiujiang District, Wuhu, Anhui, Beijing Applicant before: Wuhu Sheng innovation Mstar Technology Ltd |
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Application publication date: 20180824 |
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| WD01 | Invention patent application deemed withdrawn after publication |