CN107866911A - A kind of cement mortar stirring foam device and foaming method - Google Patents
A kind of cement mortar stirring foam device and foaming method Download PDFInfo
- Publication number
- CN107866911A CN107866911A CN201610854823.XA CN201610854823A CN107866911A CN 107866911 A CN107866911 A CN 107866911A CN 201610854823 A CN201610854823 A CN 201610854823A CN 107866911 A CN107866911 A CN 107866911A
- Authority
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- Prior art keywords
- slurry cup
- slurry
- cement mortar
- cup body
- cement
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/38—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions wherein the mixing is effected both by the action of a fluid and by directly-acting driven mechanical means, e.g. stirring means ; Producing cellular concrete
- B28C5/381—Producing cellular concrete
- B28C5/386—Plants; Systems; Methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0806—Details; Accessories
- B28C5/0812—Drum mixer cover, e.g. lid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/38—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions wherein the mixing is effected both by the action of a fluid and by directly-acting driven mechanical means, e.g. stirring means ; Producing cellular concrete
- B28C5/381—Producing cellular concrete
- B28C5/383—Producing cellular concrete comprising stirrers to effect the mixing
- B28C5/385—Stirrers specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/38—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions wherein the mixing is effected both by the action of a fluid and by directly-acting driven mechanical means, e.g. stirring means ; Producing cellular concrete
- B28C5/381—Producing cellular concrete
- B28C5/386—Plants; Systems; Methods
- B28C5/388—Methods
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The present invention, which provides a kind of cement mortar stirring foam device and foaming method, the foam device, to be included：Slurry cup base, agitating shaft, slurry cup body and slurry cup top cover, the slurry cup body is hollow structure, and the slurry cup base is sealingly disposed in the lower section of the slurry cup body, the slurry cup top seal is arranged on the top of the slurry cup body, the agitating shaft can be rotatably disposed at the center of inside of the slurry cup body, and multiple blades are provided with the agitating shaft.The present invention is simple in construction, operation repeatability is strong, and (1000r/min) can produce the foam slurry of design density under slow-speed of revolution stirring, and foam uniform and smooth in slurry, the foamed cement density prepared meets design requirement.
Description
Technical field
The present invention relates to a kind of oil gas well cementing operation fast foaming slurry cup in foam slurry room and foaming control method, tool
Body is related to foam slurry preparation and density domination, belongs to oil field low-density well cementing field.
Background technology
Well cementation introduces gas by the use of foamed cement using gas (such as air or nitrogen) as palliative in cement mortar, foaming
In the presence of agent or foam stabilizer, foam slurry is produced.At present, preparing the method for foamed cement has two kinds：(1) chemical blowing：
Be that a certain amount of foaming agent is mixed in dry cement, after cement and water mix, foaming agent and the chemistry in cement into
The raw generated reactive gas of distribution, is distributed in cement mortar so as to form foamed cement.(2) inflation foaming：I.e. in batch mixed water
Foaming agent, foam stabilizer are blended in mud, in a manner of inflation, under being acted in foam maker, produces foam slurry.Analysis
Two methods feature understands that the gas that arbitrarily devised amount can be achieved in scene inflation foaming is filled with, and the foam of formation is uniformly tiny；And
Although chemical gas generation method addressee's easy construction, gas forming amount is less, and the gas forming amount that chemically reacts is difficult to control, and causes foam
Cement density is uncontrollable, and bubble is uneven, and this foam slurry is difficult the density that cement mortar is greatly lowered in underground.Mirror
In this at present in solving low pressure and leakmess formation cementing operation, mainly mechanical aeration method is used；And chemical gas generation rule is used for
After solution cementing operation the problems such as " weightlessness " of cement.
It is indoor that foam slurry, a kind of stirring side are mainly prepared by mechanical agitation mode for aerated foam cement
Formula is that foaming, foam stabilizer material are first dissolved in water, and pouring into bottom has in the stirring slurry cup of impeller, and water is produced by high-speed stirred
Base foam, then blended with foam and cement mortar, stir；Which generation foam is easy, can be produced using common slurry cup
Raw water base foam, but can have brokenly bubble during water base foam and cement mortar blending, cause density to change, simultaneously meeting
Increase the water in cement mortar, cause intensity decreases；Another agitating mode is that foaming, foam stabilizer and cement mortar blending is uniform
Afterwards, by high-speed stirred (general 12000r/min), introduce gases into and foam slurry is produced in slurry；This method will not change
Become original ratio of mud, but normal agitation impeller is in bottom, it is difficult to produce foam slurry, while the foam up and down in whipping process
The problem of uneven be present, cause foamed cement pulp density not meet design requirement.
Therefore, the problem of foam during foamed cement is uneven is prepared for stirring, the invention provides a kind of cement
Slurry stirring foam device and control method, the device have the characteristics of simple in construction, operation repeatability is strong, stirred in blade low speed
The foam slurry of design density can be produced by mixing down (1000r/min), foam uniform and smooth in foamed cement pulp density slurry,
The foamed cement pulp density prepared meets design requirement.
The content of the invention
It is an object of the invention to provide a kind of cement mortar stirring foam device and foaming method, the apparatus structure is simple, behaviour
Make that repeatability is strong, (1000r/min) can produce the foam slurry of design density under slow-speed of revolution stirring, foam in slurry
Uniform and smooth, the foamed cement density prepared meet design requirement.
For the above-mentioned purpose, the present invention provides a kind of cement mortar stirring foam device, and it includes：Slurry cup base, agitating shaft,
Slurry cup body and slurry cup top cover, the slurry cup body is hollow structure, and the slurry cup base is sealingly disposed in the slurry cup body
Lower section, the slurry cup top seal is arranged on the top of the slurry cup body, and the agitating shaft can be rotatably disposed at described
The center of inside of slurry cup body, multiple blades are provided with the agitating shaft.
Described cement mortar stirring foam device, wherein, in addition to driver, the lower section of the agitating shaft pass through slurry cup body
The slurry cup base of lower section and it is connected with the driver.
Described cement mortar stirring foam device, wherein, in addition to centring sleeve, the top of the agitating shaft pass through slurry cup body
The slurry cup top cover of top and it is connected with centring sleeve by bearing.
Described cement mortar stirring foam device, wherein, it is provided with O-ring between the centring sleeve and slurry cup top cover.
Described cement mortar stirring foam device, wherein, the slurry cup top cover has horizontal part and vertical component effect, described vertical
Portion and the top of the slurry cup body are attached by screw thread, and the top of the edge of the horizontal part and the slurry cup body it
Between be provided with annular sealing gasket.
Described cement mortar stirring foam device, wherein, the close of annular is provided between the slurry cup base and slurry cup body
Packing.
Described cement mortar stirring foam device, wherein, the blade is in right-angled intersection in the radial direction agitating shaft
Combining form.
Described cement mortar stirring foam device, wherein, the blade agitating shaft in the radial direction radially
Combining form.
Described cement mortar stirring foam device, wherein, the blade is in consistency from top to bottom on the axial direction of agitating shaft
And the combining form being equally spaced or the combining form interlocked up and down.
The present invention also provides a kind of cement mortar stirring foaming method, and it comprises the following steps：
(1) slurry cup body volumetric calibration：Poured into clear water in slurry cup body, tighten slurry cup top cover, from the centre bore of slurry cup top cover
Place continues plus water, it is ensured that clear water be completely filled with weigh after slurry cup body clear water weight be slurry cup body internal volume VL, then will
Clear water empties；
(2) cement mortar is produced：The water of predetermined density is prepared with common slurry cup according to " GB19139 oil-well cement tests method "
Mud, percentage by weight 2%-5% foaming agent, foam stabilizer are added in cement mortar, ruler is made mixed after being gently mixed uniformly
Compound, according to weighing designated volume VsThe mixture, pour into slurry cup body；
(3) sealing stirring foaming：Slurry cup top cover is covered, tightens centring sleeve, under the stirring, shear action in blade, slurry cup
The air of middle fixed volume is involved in slurry, and the cement mortar steeped is sent out after stirring will be completely filled with slurry cup, the foam prepared
Cement slurry density is then：Cement slurry density × grout volume ÷ slurry cup internal volumes.
The beneficial effects of the invention are as follows：Top seal, convenient, operation repeatability that scene carries by force, are easy to foamed cement
Indoor preparation and analysis are starched, its stirring blade uses the combined blade of right-angled intersection, can entered under the 1000r/min slow-speed of revolution
Row foaming, by the way of first mix-foaming afterwards, will foam, foam stabilizer first mixes with ordinary cement slurry, after be stirred slurry
The hollow foam slurry for being so incensed that to set density of cup.Using the present apparatus and method, it foams easily and effect is good, water after foaming
Mud can be completely filled with slurry cup, and foam uniformity coefficient is high, any adjustable between foamed cement density 0.8-1.8g/cm3.
Brief description of the drawings
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings.Wherein：
Fig. 1 is the structural representation according to the cement mortar stirring foam device of the present invention；
Fig. 2 is the schematic diagram of (cement mortar that certain volume is poured into slurry cup) before stirring；
Fig. 3 is the schematic diagram of (cement mortar is completely filled with slurry cup after stirring foaming) after stirring.
In the accompanying drawings, identical part uses identical reference.Accompanying drawing is not according to the ratio of reality.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
First as shown in figure 1, it is the structural representation that foam device is stirred according to the cement mortar of the present invention；The present invention carries
A kind of cement mortar foam device is supplied, it mainly includes：Slurry cup base 1, driver 2, agitating shaft 3, slurry cup body 4, slurry cup top cover
5th, sealing gasket 6, O-ring 7 and centring sleeve 8.
The slurry cup body 4 is hollow structure, and the slurry cup base 1 is arranged on the lower section of the slurry cup body 4, the slurry
Cup top cover 5 is arranged on the top of the slurry cup body 4.
The agitating shaft 3 can be rotatably set in the center of inside of the slurry cup body 4, wherein, the lower section of agitating shaft 3 passes through
The slurry cup base 1 of the lower section of slurry cup body 4 and it is connected with driver 2, the slurry cup top of the top of agitating shaft 3 through the top of slurry cup body 4
Lid 5 and it is connected with centring sleeve 8 by bearing.The driver 2 can drive agitating shaft 3 to be rotated relative to slurry cup body 4.
Preferably, the both ends of the agitating shaft 3 pass through screw thread with the driver 2 and the bearing inside centring sleeve 8 respectively
Connection, to ensure the stability of connection.
Multiple blades 31 are provided with the agitating shaft 3.Preferably, the distribution form of the blade 31 can have a variety of,
Such as blade 31 in agitating shaft 3 in the radial direction in the combining form or radially etc. of right-angled intersection (such as four blades)
Combining form away from distribution (such as blade of other quantity), then for example on the axial direction of agitating shaft 3 in consistency from top to bottom and
The combining form being equally spaced or the combining form interlocked up and down.Preferably, neighbouring blade 31, which is connected, forms mouth word
Type, i.e. outer end of the adjacent blades 31 away from agitating shaft 3 are connected with blade, to increase the agitation area of blade 31, lifting agitation effect
Fruit.By carrying out particular design to the distribution form of blade, (1000r/min) design can be produced under slow-speed of revolution stirring
The foam slurry of density, foam uniform and smooth in slurry, the foamed cement density prepared meet design requirement.
In order to ensure the sealing of structure, multiple sealing knots are additionally provided with cement mortar of the invention stirring foam device
Structure.For example, the slurry cup top cover 5 has horizontal part 51 and vertical component effect 52, the top of the vertical component effect 52 and the slurry cup body 4 leads to
Cross screw thread to be attached, and the sealing gasket of annular is provided between the top of the edge of the horizontal part 51 and the slurry cup body 4
6, so that it is guaranteed that the sealing effectiveness between slurry cup top cover 5 and slurry cup body 4 is good, during stirring, at the inside of slurry cup body 4
In sealed environment, ensure that volume is fixed in slurry cup body 4, cement mortar is not spilt over.
In addition, it is provided with O-ring between centring sleeve 8 and slurry cup top cover 5, it is ensured that centring sleeve 8 can be effectively to slurry cup top cover 5
Sealed.
The slurry cup base 1 may also set up and be provided with annular between sealing structure, such as slurry cup base 1 and slurry cup body 4
Sealing gasket (not indicated in figure).
Before use, agitating shaft 3 and driver 2 are connected, the internal capacity of slurry cup body 4 need to be demarcated, so as to
Determine cement mortar pouring volume.Specific technical scheme is as follows：
(1) volumetric calibration of slurry cup body 4：Poured into clear water in slurry cup body 4, tighten slurry cup top cover 5, from slurry cup top cover 5
Continue at heart hole plus water, it is ensured that clear water be completely filled with weigh after slurry cup body 4 clear water weight be slurry cup body 4 internal volume VL,
Then clear water is emptied；
(2) cement mortar is produced：Certain density p is prepared with common slurry cup according to " GB19139 oil-well cement tests method "s's
Cement mortar, percentage by weight 2%-5% foaming agent, foam stabilizer are added in cement mortar, after ruler is gently mixed uniformly, according to
Weigh designated volume VsPour into sealing stirring foaming slurry cup 4 in, as shown in Fig. 2 Fig. 2 hollow gas accumulate Vg+ grout volume Vs
=slurry cup internal volume VL；
(3) sealing stirring foaming：Slurry cup top cover 5 is covered, tightens centring sleeve 8, regulation motor range of speeds 1000r-
2000r/min, under the stirring, shear action in multiple-blade 31, the air of fixed volume is involved in slurry in slurry cup, is being stirred
After 30s-120s, slurry cup (as shown in Figure 3) will be completely filled with by sending out the cement mortar steeped, prepare foamed cement pulp density then
For：Cement slurry density × grout volume ÷ slurry cup internal volumes, i.e. ρFoam slurry=ρs×Vs÷VL, by changing grout volume,
The density of cement mortar after control foaming, so as to meet design requirement.
Implement one：Prepare setting density 1.50g/cm3Foam slurry
First, the internal volume of clear water measure slurry cup (in the case of agitating shaft) is 1300mL；Next, according to
GB19139 oil-well cement tests method prepares density 1.88g/cm3Cement mortar 1050mL, blending foaming, foam stabilizer 12L, use
Ruler is gently mixed uniformly, is poured into sealing stirring slurry cup 1032mL, top cover, is tightened centring sleeve, adjust motor speed
After 1000r/min, stirring at low speed 1min, whole slurry cup can be full of by sending out the cement mortar steeped, reach setting density 1.50g/
cm3。
Embodiment two, prepare setting density 0.8g/cm3Foam slurry
First, the internal volume of clear water measure slurry cup (in the case of agitating shaft) is 1300mL；Next, according to
GB19139 oil-well cement tests method prepares density 1.88g/cm3Cement mortar 560mL, blending foaming, foam stabilizer 8L, with straight
Chi is gently mixed uniformly, is poured into sealing stirring slurry cup 553mL, top cover, is tightened centring sleeve, adjustment motor speed 1000r/
After min, stirring at low speed 1min, whole slurry cup can be full of by sending out the cement mortar steeped, reach setting density 0.80g/cm3。
Compared with prior art, the beneficial effects of the invention are as follows：
(1) apparatus structure is simple, it is convenient to carry, operation repeatability is strong；
(2) foaming is easy, foaming effect is good, and the cement mortar after foaming can be completely filled with slurry cup；
(3) under the conditions of stirring at low speed (1000r/min), set containing foaming, directly being produced in the cement mortar of foam stabilizer
The foam slurry of density, in 0.8-1.8g/cm3Between arbitrarily adjust.
In summary, foam device and foaming side are stirred with foam slurry the invention discloses a kind of oil gas well cementing operation
Method, its slurry cup are designed with top seal, and that scene carries is convenient, operation repeatability is strong, be easy to prepare foam slurry the room in and
Analysis, its stirring blade use the combined blade of right-angled intersection, can foamed under the 1000r/min slow-speed of revolution, use
The mode first mix-to foam afterwards, will foam, foam stabilizer first mixes with ordinary cement slurry, after be stirred that slurry cup is hollow to be so incensed that
To the foam slurry of setting density.Using the present apparatus and method, it foams easily and effect is good, and cement mortar can be completely after foaming
Full of slurry cup, foam uniformity coefficient is high, foamed cement density 0.8-1.8g/cm3Between it is any adjustable.
Although by reference to preferred embodiment, invention has been described, is not departing from the situation of the scope of the present invention
Under, various improvement can be carried out to it and part therein can be replaced with equivalent.Especially, as long as being rushed in the absence of structure
Prominent, the every technical characteristic being previously mentioned in each embodiment can combine in any way.The invention is not limited in text
Disclosed in specific embodiment, but all technical schemes including falling within the scope of the appended claims.
Claims (10)
1. a kind of cement mortar stirs foam device, it is characterised in that including：Slurry cup base, agitating shaft, slurry cup body and slurry cup top
Lid, the slurry cup body is hollow structure, and the slurry cup base is sealingly disposed in the lower section of the slurry cup body, the slurry cup top
Lid is sealingly disposed in the top of the slurry cup body, and the agitating shaft can be rotatably disposed at the center of inside of the slurry cup body,
Multiple blades are provided with the agitating shaft.
2. cement mortar according to claim 1 stirs foam device, it is characterised in that also including driver, the stirring
The lower section of axle is connected through the slurry cup base below slurry cup body and with the driver.
3. cement mortar according to claim 1 stirs foam device, it is characterised in that also including centring sleeve, the stirring
The top of axle by bearing is connected through the slurry cup top cover above slurry cup body and with centring sleeve.
4. cement mortar according to claim 3 stirs foam device, it is characterised in that the centring sleeve and slurry cup top cover it
Between be provided with O-ring.
5. cement mortar according to claim 1 stirs foam device, it is characterised in that the slurry cup top cover has horizontal part
And vertical component effect, the top of the vertical component effect and the slurry cup body are attached by screw thread, and the edge of the horizontal part with
The sealing gasket of annular is provided between the top of the slurry cup body.
6. cement mortar according to claim 1 stirs foam device, it is characterised in that the slurry cup base and slurry cup body it
Between be provided with annular sealing gasket.
7. cement mortar according to claim 1 stirs foam device, it is characterised in that radial direction of the blade in agitating shaft
It is in the combining form of right-angled intersection on direction.
8. cement mortar according to claim 1 stirs foam device, it is characterised in that radial direction of the blade in agitating shaft
Combining form on direction radially.
9. cement mortar according to claim 1 stirs foam device, it is characterised in that the blade is in the axial direction of agitating shaft
In consistency from top to bottom and the combining form being equally spaced or the combining form interlocked up and down on direction.
10. a kind of cement mortar stirs foaming method, it is characterised in that comprises the following steps：
(1) slurry cup body volumetric calibration：Poured into clear water in slurry cup body, tighten slurry cup top cover, from the central hole of slurry cup top cover after
Continuous plus water, it is ensured that clear water be completely filled with weigh after slurry cup body clear water weight be slurry cup body internal volume VL, then in slurry cup
Centring sleeve is installed at top cap central bore；
(2) cement mortar is produced：The cement of predetermined density is prepared with common slurry cup according to " GB19139 oil-well cement tests method "
Slurry, percentage by weight 2%-5% foaming agent, foam stabilizer are added in cement mortar, and mixing is made after being gently mixed uniformly in ruler
Thing, according to weighing designated volume VsThe mixture, pour into slurry cup body；
(3) sealing stirring foaming：Slurry cup top cover is covered, tightens centring sleeve, it is solid in slurry cup under the stirring, shear action in blade
The air for determining volume is involved in slurry, and the cement mortar steeped is sent out after stirring will be completely filled with slurry cup, the foamed cement prepared
Pulp density is then：Cement slurry density × grout volume ÷ slurry cup internal volumes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610854823.XA CN107866911A (en) | 2016-09-27 | 2016-09-27 | A kind of cement mortar stirring foam device and foaming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610854823.XA CN107866911A (en) | 2016-09-27 | 2016-09-27 | A kind of cement mortar stirring foam device and foaming method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107866911A true CN107866911A (en) | 2018-04-03 |
Family
ID=61751101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610854823.XA Pending CN107866911A (en) | 2016-09-27 | 2016-09-27 | A kind of cement mortar stirring foam device and foaming method |
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| CN (1) | CN107866911A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110948690A (en) * | 2019-12-16 | 2020-04-03 | 张晓奎 | A concrete processing equipment for building site's stirring |
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|---|---|---|---|---|
| KR20040086627A (en) * | 2003-04-03 | 2004-10-12 | 홍지기술산업주식회사 | Mixer for Grout |
| CN102555055A (en) * | 2010-12-10 | 2012-07-11 | 中国石油化工股份有限公司 | Pressurized stirring device for foamed cement slurry |
| CN104227846A (en) * | 2013-06-21 | 2014-12-24 | 中国石油化工股份有限公司 | Foam cement paste preparation device and application thereof |
| CN105666697A (en) * | 2016-01-29 | 2016-06-15 | 湖北大学 | Foam concrete preparation system and foam concrete preparation method |
-
2016
- 2016-09-27 CN CN201610854823.XA patent/CN107866911A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040086627A (en) * | 2003-04-03 | 2004-10-12 | 홍지기술산업주식회사 | Mixer for Grout |
| CN102555055A (en) * | 2010-12-10 | 2012-07-11 | 中国石油化工股份有限公司 | Pressurized stirring device for foamed cement slurry |
| CN104227846A (en) * | 2013-06-21 | 2014-12-24 | 中国石油化工股份有限公司 | Foam cement paste preparation device and application thereof |
| CN105666697A (en) * | 2016-01-29 | 2016-06-15 | 湖北大学 | Foam concrete preparation system and foam concrete preparation method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110948690A (en) * | 2019-12-16 | 2020-04-03 | 张晓奎 | A concrete processing equipment for building site's stirring |
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Application publication date: 20180403 |
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