CN106565191A - Method for preparing microporous concrete emitter through combination of dry pressing and vacuum atomization - Google Patents
Method for preparing microporous concrete emitter through combination of dry pressing and vacuum atomization Download PDFInfo
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- CN106565191A CN106565191A CN201610880496.5A CN201610880496A CN106565191A CN 106565191 A CN106565191 A CN 106565191A CN 201610880496 A CN201610880496 A CN 201610880496A CN 106565191 A CN106565191 A CN 106565191A
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- douche
- atomizing
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- lucite
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Classifications
-
- 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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/0272—Hardening under vacuum or reduced pressure
-
- 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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a method for preparing a microporous concrete emitter through combination of dry pressing and vacuum atomization. According to the method, cement and sand are adopted as raw materials, a silica sol is adopted as a mold pressing adhesive, a microporous concrete billet is prepared by using a dry pressing method, and an emitter billet is subjected to curing by using a vacuum atomization and humidification method so as to finally obtain the microporous concrete emitter. According to the present invention, by regulating the cement content in the raw materials, the particle size of the sand, and the vacuum atomization maintenance process, the opening porosity of the microporous concrete emitter can be effectively regulated so as to achieve the accurate control of the seepage amount of the emitter; the manufacturing cost is much lower than the cost of the microporous ceramic emitter, and the performance test results show that the microporous concrete emitter has the same excellent mechanical property and the same excellent water permeability as the microporous ceramic; and the method has advantages of cheap and easily-available raw materials, simple and easy-performing curing process, high opening porosity, stable mechanical property, excellent water permeability, and the like.
Description
Technical field
The invention belongs to douche preparing technical field, and in particular to a kind of dry-pressing prepares micropore coagulation with reference to vacuum atomizing
The method of native douche.
Background technology
Water resources crisis and grain security are the key subjects that China faces 21 century, using water saving, the irrigation side of energy-conservation
Method is the inevitable choice alleviated water resources crisis and ensure grain security.Last century Mo, the appearance of plastics industry cause various sections
Water irrigation technique has tremendous development.But the infiltrating irrigation product of plastics has the shortcomings which is difficult to overcome：(1) manufacturing process is complicated；(2)
Easily aging, service life is short；(3) hydrophilic it is poor, and the soil compatibility it is not high, residual water is difficult to discharge, winter easy bursting by freezing；(4)
Be subject to worm bore, damaged by rats and fail；(5) it is difficult to clean after runner blocking；(6) scrap rear harmless treatment high cost.
Some scholar's exploration discoveries, micropore ceramics are prepared into douche, and not only hydraulic performance is excellent, and can avoid
The drawbacks described above of plastics douche.In recent years, prepared by the material based on micropore ceramics douche and hydraulic performance research is gradually received
To the attention of some scholars.Document " clay-based micropore ceramics Subirrigation douche is prepared and is optimized with performance. agricultural mechanical journal, 46
(2015), No.183-188 " discloses a kind of low cost preparation method of clay-based micropore ceramics douche.The method is with viscous
Soil, slag and Ludox are raw material, have mechanical property steady using the clay-based micropore ceramics douche of high-temperature sintering process preparation
The high remarkable advantage of fixed, open porosity.When sintering temperature is 1075 DEG C, slag volume is 10%～30% clay-based micropore
Open porosity of the ceramics with the bending strength of 9.0-11.0MPa, the linear shrinkage ratio of 3.8-4.7% and 36.8～44.8%,
It is the ideal material for preparing micropore ceramics douche.Document " kieselguhr micropore ceramics douche optimum preparation condition, agriculture project
Journal, 31 (2015), No.70-76 " discloses a kind of preparation method of micropore ceramics douche.The method is with clay, kieselguhr
It is raw material with calcium sulfate, there is higher open porosity and preferable waterpower using micropore ceramics douche prepared by sintering process
Performance.Wherein adopt 1075 DEG C sintering kieselguhr volumes for 15% micropore ceramics douche, linear shrinkage ratio be 4.9%, open
It is 448MPa that mouth porosity is 26.3%, Vickers hardness, is 1.64L/h in the flow of 1 meter of head, is that a kind of hydraulic performance is excellent
Micropore ceramics douche.A kind of patent " preparation method of buried micropore ceramics root irrigator " (application number：
CN201310479770) disclose a kind of preparation method of buried micropore ceramics root irrigator.With clay and slag as original
Material, the micropore ceramics douche preparation method prepared using 950 DEG C of sintering are simple, draw materials conveniently, cheap, at 0.5～1 meter
The flow of head is up to 4.2-8.5L/h, and can effectively prevent the generation that douche blocks, and the development of water-saving irrigation technique is had
There is important realistic meaning.
Up to now, prepare with regard to the material of micropore ceramics douche and hydraulic performance has studied report on a small quantity.It is overall
On, preparing the raw material used by micropore ceramics douche and be clay cheap and easy to get, slag, kieselguhr etc., this contributes to drop
The manufacturing cost of low micropore ceramics douche.But the preparation of micropore ceramics be unable to do without sintering, sintering can dramatically increase micropore pottery
The manufacturing cost of porcelain douche.From this, compared to plastics douche, although micropore ceramics douche has many significant
Advantage, but higher manufacturing cost is difficult to meet the requirement of its agricultural extension.
The content of the invention
It is high for micropore ceramics douche manufacturing cost in above-mentioned prior art, the difficult problem of agricultural extension, mesh of the present invention
Be, there is provided a kind of method that dry-pressing prepares cell concrete douche with reference to vacuum atomizing.
In order to realize above-mentioned task, the present invention takes following technical solution：
A kind of method that dry-pressing prepares cell concrete douche with reference to vacuum atomizing, it is characterised in that follow these steps to
Carry out：
A the sand gathered from natural battle field is screened by (), obtain the fine sand that particle diameter is 0.18～1.7 millimeter, will
Fine sand is mixed in proportion with cement and is poured in ball grinder, is calculated in mass percent, and cement accounts for the 12～24% of batch mixing gross mass, separately
It is outer per 100 grams of batch mixings in add 15～25 a diameter of 8～12 millimeters of alumina balls, it is dry to batch mixing using tumbling ball mill
Ball milling makes batch mixing be sufficiently mixed uniformly in 0.5～1.0 hour；
B () pours ball milling good batch mixing in cement mortar mixer into, stir spray mass concentration for 10～
25% Ludox, according to cement content in the concentration and batch mixing of Ludox, sprays about 20～35 grams of silicon per 100 grams of cement molten
Glue；After Ludox is sprayed, batch mixing continues stirring 10～20 minutes, is subsequently poured in mould, using the pressure of 5～10MPa
Douche base substrate is made in dry-pressing, and pressurize opened mould after 15～30 seconds, and the douche base substrate being molded is taken out；
C () is positioned over douche base substrate in closed lucite case, with the use of true with what lucite case was connected
Empty pump and atomizing humidifier, carry out evacuation and wet operations to douche base substrate；During concrete maintenance, connection vacuum pump is first opened
With the pipeline valve of lucite case, start vacuum pump to lucite case evacuation, when air pressure is less than 0.5 in lucite case
×105Pipeline valve is closed during Pa；Then the pipeline valve of connection atomizing humidifier and lucite case is opened, is started atomization and is added
Wet device cuts out valve after humidifying 2.0～4.0 hours to the douche in lucite case；Organic glass is made and is put into from douche
The day of glass case is counted, and aforesaid operations are repeated once in same time daily, continuously repeats 7～14 days；
The valve for connecting with ambient atmosphere is additionally provided with lucite case, vacuum atomizing wet operations is being carried out every time
Before, the valve is first opened, the air pressure in lucite case is slowly recovered to normal pressure, then carry out vacuum atomizing humidification behaviour again
Make；When the operation of vacuum atomizing humidifying performance is not repeated, will be the valve of the connection atomizing humidifier on lucite case and the external world big
The valve of gas connection is normally opened, starts atomizing humidifier in the set time daily, to the douche atomizing humidifying performance in lucite case
0.5～1.0 hour, the operation repeated to douche maintenance to terminate always, obtains cell concrete douche.
The method that the dry-pressing of the present invention prepares cell concrete douche with reference to vacuum atomizing, has compared with prior art
Following characteristics：
1st, the cell concrete douche intensity that prepared using the method that the present invention is provided is high, flow is big, with micropore
The same excellent hydraulic performance of ceramic douche.By the content of cement, the particle diameter of sand and vacuum atomizing in feed change
The parameter of technique, can effectively adjust the open porosity of cell concrete douche, realize the accurate control to douche water percolating capacity
System.Importantly, due to the raw material for preparing cell concrete douche is cement cheap and easy to get and sand, and compared to micro-
Hole ceramics douche prepares the sintering process for adopting, and the power consumption of vacuum atomizing maintaining process is little, therefore manufacturing cost is far below micro-
Hole ceramics douche.
2nd, common concrete component is that cement, sand and water are mixed slurry after-pouring by a certain percentage to form.
The concrete component of molding almost no open pore is poured, therefore our daily seen concrete components are all waterproof.Equally,
There is no seepage of water yet using the concrete douche for pouring molding.The present invention is few by spraying in the batch mixing to cement and sand
Then batch mixing is molded into douche base substrate using the method for dry-pressing as bonding agent by the Ludox of amount.Dry-pressing formed pours water
Device base substrate internal porosity communicates with each other, it is ensured that the open porosity of cell concrete douche is required.In addition, raw material
In Ludox have higher adhesive strength, after douche is dry-pressing formed can the horse back demoulding, greatly save douche
Setting time.
3rd, it is relatively low using douche base substrate initial strength made by dry pressing, Water spray or leaching can not be directly used in maintenance
Bubble, otherwise the micro structure of douche can be caved in, and make the open pore of script inside douche that closure to occur, and open porosity is tight
Reduce again, it is impossible to meet the hydraulic performance requirement of douche, douche is completely impermeable when serious.Using the maintenance side of the present invention
Method, douche is put in closed lucite case, douche is conserved using the method for atomizing humidifying performance, in douche
The open pore of portion's script will not occur closure, make douche have excellent permeability performance.In addition, carrying out to douche every time
Before atomizing humidifying performance, first to lucite case evacuation, also the pore of the closing originally of a part inside douche can be opened, be made
Become open pore, further increase douche open porosity, improve douche permeability performance.
The present invention adopts hole inside dry pressure formed douche base substrate for the open pore being interconnected, and this is this
One of bright critical process.The maintenance process humidified using vacuum atomizing, can both be such that douche is fully conserved, it is ensured that to pour water
Utensil has higher mechanical property, in the case of can making the open pore inside douche base substrate that closure does not occur again, further carries
The open porosity of high douche, this is the two of the key technology of the present invention.
The present invention prepare cell concrete douche using raw material include cement, fine sand and Ludox.Cement is commercially available
Construction material, using the Portland cement for being numbered P.O32.5, P.O42.5, P.O52.5 that market is common.In order to
Reduce the manufacturing cost of douche, preferably cheap low grade P.O32.5 cement.In order to meet the seepage of water of douche
Can require, the open pore inside cell concrete douche is optimal with micron order, therefore should adopt the less fine sand of particle diameter.This
The fine sand that invention is used is excavated from natural battle field, without the need for purchase, the manufacturing cost of douche can be greatly lowered.Silicon
Colloidal sol is a kind of cheap commercially available industrial preparation, the present invention, in Ludox SiO not high to the concentration requirement of Ludox2's
Concentration only needs >=10%.When the method provided using the present invention is conserved to cell concrete douche, evacuation and atomization
Wet operations need to only expend little electricity, prepare electricity spent by micropore ceramics douche far below high-temperature sintering process.
In sum, the method for being provided using the present invention prepares cell concrete douche, and its manufacturing cost is far below micro-
Hole ceramics douche, and by performance test, cell concrete douche is with the mechanical property equally excellent with micropore ceramics
Energy and permeability performance.
Description of the drawings
Fig. 1 is the flow chart that the dry-pressing of the present invention prepares cell concrete douche with reference to vacuum atomization；
Fig. 2 is the schematic device that the present invention carries out vacuum atomizing maintenance to cell concrete douche；
Fig. 3 is the assembling schematic diagram of the cell concrete douche of the present invention；
Fig. 4 is the infiltration photo of the cell concrete douche in different heads of the present invention.
The present invention is described in further detail with reference to the accompanying drawings and examples.
Specific embodiment
Embodiment 1：
The dry-pressing of the present embodiment is as shown in Figure 1 with reference to the flow process that vacuum atomization prepares cell concrete douche：
The sand excavated from battle field is crossed the sieve of 12 mesh and 18 mesh successively, it is 1.0～1.7 millimeters to select particle size range
Sand.By the sand selected be numbered the cement of P.O32.5 by 80：20 ratio mixing is poured in ball grinder, is mixed per 100 grams
15～25 a diameter of 8～12 millimeters of alumina balls are added in material, is mixed within 1.0 hours using tumbling ball mill mixing
Material.Batch mixing is poured in cement mortar mixer, the Ludox that spray concentration is 10% is stirred, per 100 grams of cement
The Ludox of 35 grams of sprinkling.After Ludox is sprayed, batch mixing continues stirring 15 minutes, adopts 10MPa in being subsequently poured into mould
Pressure be molded into douche, pressurize opened mould after 30 seconds.Douche base substrate is taken out, closed organic glass is neatly placed in
The pipeline valve 1 of connection vacuum pump and lucite case in glass case, is opened, starts vacuum pump to lucite case evacuation, when
In lucite case, air pressure reaches 0.48 × 105During Pa, pipeline valve 1 is closed.Open connection atomizing humidifier and lucite
The pipeline valve 2 of case, starts atomizing humidifier to the douche atomizing humidifying performance 3.0 hours in lucite case, closes valve 2.
The operation of above-mentioned vacuum atomizing repeats one in same time daily from douche compression molding and from being put into organic glass box
It is secondary, continuously repeat 14 days, before each repetitive operation, first open valve 3, the air pressure in lucite case is slowly recovered to normal
Pressure.From the beginning of the 15th day, will be the valve 2 and valve 3 on lucite case normally opened, only start atomizing humidifying performance in same time daily
Device, to the douche atomizing humidifying performance 1.0 hours in lucite case, the operation repeats to the 28th day of douche maintenance to tie always
Beam, obtains cell concrete douche.
The cell concrete douche for having conserved is taken out and is dried, carry out performance test, test result is referring to table 1.Pour water
The open porosity of device is 23.4%, and average pore size is 2.6 microns, and rupture strength is 3.1MPa, stream of the douche in 3 meters of heads
Measure as 2.23L/h.
Embodiment 2：
The dry-pressing of the present embodiment is as shown in Figure 1 with reference to the flow process that vacuum atomization prepares cell concrete douche：
The sand excavated from battle field is crossed the sieve of 18 mesh and 30 mesh successively, it is 0.6～1.0 millimeter to select particle size range
Sand.By the sand selected be numbered the cement of P.O32.5 by 82：18 ratio mixing is poured in ball grinder, is mixed per 100 grams
15～25 a diameter of 8～12 millimeters of alumina balls are added in material, is mixed within 0.5 hour using tumbling ball mill mixing
Material.Batch mixing is poured in cement mortar mixer, the Ludox that spray concentration is 15% is stirred, per 100 grams of cement
The Ludox of 30 grams of sprinkling.After Ludox is sprayed, batch mixing continues stirring 20 minutes, adopts 8MPa's in being subsequently poured into mould
Pressure is molded into douche, and pressurize opened mould after 20 seconds.Douche base substrate is taken out, closed lucite is neatly placed in
The pipeline valve 1 of connection vacuum pump and lucite case in case, is opened, starts vacuum pump to lucite case evacuation, when having
In machine glass box, air pressure reaches 0.45 × 105During Pa, pipeline valve 1 is closed.Open connection atomizing humidifier and lucite case
Pipeline valve 2, start atomizing humidifier to the douche atomizing humidifying performance 2.5 hours in lucite case, close valve 2.On
Vacuum atomizing operation is stated from douche compression molding and from being put into organic glass box, is repeated once in same time daily,
Continuously repeat 10 days, valve 3 is first opened before each repetitive operation, the air pressure in lucite case is slowly recovered to normal pressure.
From the beginning of the 11st day, will be the valve 2 and valve 3 on lucite case normally opened, only start atomizing humidifier in same time daily,
To the douche atomizing humidifying performance 1.0 hours in lucite case, the operation repeats terminating for the 28th day to douche maintenance always,
Obtain cell concrete douche.
Cell concrete douche is taken out and is dried, carry out performance test, test result is referring to table 1.The opening of douche
Porosity is 25.5%, and average pore size is 2.6 microns, and rupture strength is 2.9MPa, and douche in the flow of 3 meters of heads is
2.68L/h。
Embodiment 3：
The dry-pressing of the present embodiment is as shown in Figure 1 with reference to the flow process that vacuum atomization prepares cell concrete douche：
The sand excavated from battle field is crossed the sieve of 30 mesh and 80 mesh successively, particle size range is selected for 0.18～0.6 millimeter
Sand.By the sand selected be numbered the cement of P.O42.5 by 82：18 ratio mixing is poured in ball grinder, per 100 grams
15～25 a diameter of 8～12 millimeters of alumina balls are added in batch mixing, is mixed within 0.5 hour using tumbling ball mill mixing
Material.Batch mixing is poured in cement mortar mixer, the Ludox that spray concentration is 15% is stirred, per 100 grams of cement
The Ludox of 25 grams of sprinkling.After Ludox is sprayed, batch mixing continues stirring 15 minutes, adopts 5MPa's in being subsequently poured into mould
Pressure is molded into douche, and pressurize opened mould after 20 seconds.Douche base substrate is taken out, closed lucite is neatly placed in
The pipeline valve 1 of connection vacuum pump and lucite case in case, is opened, starts vacuum pump to lucite case evacuation, when having
In machine glass box, air pressure reaches 0.42 × 105During Pa, pipeline valve 1 is closed.Open connection atomizing humidifier and lucite case
Pipeline valve 2, start atomizing humidifier to the douche atomizing humidifying performance 3.5 hours in lucite case, close valve 2.On
Vacuum atomizing operation is stated from douche compression molding and from being put into organic glass box, is repeated once in same time daily,
Continuously repeat 8 days, valve 3 is first opened before each repetitive operation, the air pressure in lucite case is slowly recovered to normal pressure.From
9th day starts, will be the valve 2 and valve 3 on lucite case normally opened, only starts atomizing humidifier in same time daily, right
Douche atomizing humidifying performance in lucite case 0.5 hour, the operation repeat terminating for the 28th day to douche maintenance always, obtain
To cell concrete douche.
Cell concrete douche is taken out and is dried, carry out performance test, test result is referring to table 1.The opening of douche
Porosity is 28.8%, and average pore size is 2.5 microns, and rupture strength is 2.8MPa, and douche in the flow of 3 meters of heads is
3.02L/h。
Embodiment 4：
The dry-pressing of the present embodiment is as shown in Figure 1 with reference to the flow process that vacuum atomization prepares cell concrete douche：
The sand excavated from battle field is crossed the sieve of 12 mesh and 18 mesh successively, it is 1.0～1.7 millimeters to select particle size range
Sand.By the sand selected be numbered the cement of P.O52.5 by 85：15 ratio mixing is poured in ball grinder, is mixed per 100 grams
15～25 a diameter of 8～12 millimeters of alumina balls are added in material, is mixed within 1.0 hours using tumbling ball mill mixing
Material.Batch mixing is poured in cement mortar mixer, the Ludox that spray concentration is 20% is stirred, per 100 grams of cement
The Ludox of 25 grams of sprinkling.After Ludox is sprayed, batch mixing continues stirring 20 minutes, adopts 8MPa's in being subsequently poured into mould
Pressure is molded into douche, and pressurize opened mould after 20 seconds.Douche base substrate is taken out, closed lucite is neatly placed in
The pipeline valve 1 of connection vacuum pump and lucite case in case, is opened, is started vacuum pump to lucite case evacuation, is worked as glass
In glass case, air pressure reaches 0.42 × 105During Pa, pipeline valve 1 is closed.Open the pipe of connection atomizing humidifier and lucite case
Road valve 2, starts atomizing humidifier to the douche atomizing humidifying performance 3.5 hours in lucite case, closes valve 2.It is above-mentioned true
Empty nebulisation operation is repeated once in same time, continuously daily from douche compression molding and from being put into organic glass box
Repeat 8 days, valve 3 is first opened before each repetitive operation, the air pressure in lucite case is slowly recovered to normal pressure.From the 9th
It starts, will be the valve 2 and valve 3 on lucite case normally opened, only starts atomizing humidifier in same time daily, to organic
Douche atomizing humidifying performance in glass box 0.5 hour, the operation repeat terminating for the 28th day to douche maintenance always, obtain micro-
Hole concrete douche.
Cell concrete douche is taken out from lucite case and is dried, carry out performance test, test result is referring to table 1.
The open porosity of douche is 31.5%, and average pore size is 2.5 microns, and rupture strength is 2.6MPa, and douche is in 3 meters of heads
Flow be 3.56L/h.
Table 1：
Claims (1)
1. a kind of method that dry-pressing prepares cell concrete douche with reference to vacuum atomizing, it is characterised in that follow these steps to into
OK：
A the sand gathered from natural battle field is screened by (), obtain the fine sand that particle diameter is 0.18～1.7 millimeter, by fine sand
It is mixed in proportion with cement and pours in ball grinder, be calculated in mass percent, cement accounts for the 12～24% of batch mixing gross mass, in addition often
15～25 a diameter of 8～12 millimeters of alumina balls are added in 100 grams of batch mixings, batch mixing dry bulb is ground using tumbling ball mill
Batch mixing is made to be sufficiently mixed uniformly within 0.5～1.0 hour；
B () pours ball milling good batch mixing in cement mortar mixer into, stir and spray mass concentration for 10～25%
Ludox, according to cement content in the concentration and batch mixing of Ludox, spray about 20～35 grams of Ludox per 100 grams of cement；Silicon
After colloidal sol is sprayed, batch mixing continues stirring 10～20 minutes, is subsequently poured in mould, using the pressure dry-pressing system of 5～10MPa
Into douche base substrate, pressurize opened mould after 15～30 seconds, and the douche base substrate being molded is taken out；
C () is positioned over douche base substrate in closed lucite case, with the use of the vacuum pump being connected with lucite case
And atomizing humidifier, evacuation and wet operations are carried out to douche base substrate；During concrete maintenance, first open connection vacuum pump and have
The pipeline valve of machine glass box, starts vacuum pump to lucite case evacuation, when in lucite case air pressure less than 0.5 ×
105Pipeline valve is closed during Pa；Then the pipeline valve of connection atomizing humidifier and lucite case is opened, starts atomizing humidifying performance
Device cuts out valve after humidifying 2.0～4.0 hours to the douche in lucite case；Make from douche and be put into lucite
The day of case is counted, and aforesaid operations are repeated once in same time daily, continuously repeats 7～14 days；
The valve for connecting with ambient atmosphere is additionally provided with lucite case, every time carry out vacuum atomizing wet operations it
Before, the valve is first opened, the air pressure in lucite case is slowly recovered to normal pressure, then carry out vacuum atomizing humidification behaviour again
Make；When the operation of vacuum atomizing humidifying performance is not repeated, will be the valve of the connection atomizing humidifier on lucite case and the external world big
The valve of gas connection is normally opened, starts atomizing humidifier in the set time daily, to the douche atomizing humidifying performance in lucite case
0.5～1.0 hour, the operation repeated to douche maintenance to terminate always, obtains cell concrete douche.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610880496.5A CN106565191B (en) | 2016-10-09 | 2016-10-09 | A kind of method that dry-pressing combination vacuum atomizing prepares cell concrete douche |
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| CN201610880496.5A CN106565191B (en) | 2016-10-09 | 2016-10-09 | A kind of method that dry-pressing combination vacuum atomizing prepares cell concrete douche |
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| CN106565191B CN106565191B (en) | 2019-04-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109372551A (en) * | 2018-11-26 | 2019-02-22 | 蓝传雯 | A kind of mould material spray agent spraying system |
Citations (2)
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| CN103553571A (en) * | 2013-10-14 | 2014-02-05 | 西北农林科技大学 | Preparation method of buried micropore ceramic root-irrigation emitter |
| CN104798665A (en) * | 2015-04-10 | 2015-07-29 | 河海大学 | Novel micro-porous ceramic irrigation emitter for infiltrating irrigation technology and preparation method thereof |
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- 2016-10-09 CN CN201610880496.5A patent/CN106565191B/en not_active Expired - Fee Related
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|---|---|---|---|---|
| CN103553571A (en) * | 2013-10-14 | 2014-02-05 | 西北农林科技大学 | Preparation method of buried micropore ceramic root-irrigation emitter |
| CN104798665A (en) * | 2015-04-10 | 2015-07-29 | 河海大学 | Novel micro-porous ceramic irrigation emitter for infiltrating irrigation technology and preparation method thereof |
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| 李向明等: "微孔混凝土灌水器制备工艺与性能研究", 《农业机械学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109372551A (en) * | 2018-11-26 | 2019-02-22 | 蓝传雯 | A kind of mould material spray agent spraying system |
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| CN106565191B (en) | 2019-04-23 |
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