CN107351241A - A kind of Homogeneous Aqueous rate manipulated soil device for formulating and its application in soil test - Google Patents
A kind of Homogeneous Aqueous rate manipulated soil device for formulating and its application in soil test Download PDFInfo
- Publication number
- CN107351241A CN107351241A CN201710620011.3A CN201710620011A CN107351241A CN 107351241 A CN107351241 A CN 107351241A CN 201710620011 A CN201710620011 A CN 201710620011A CN 107351241 A CN107351241 A CN 107351241A
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- Prior art keywords
- soil
- water
- cabin
- stirring
- flow control
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C1/00—Apparatus or methods for obtaining or processing clay
- B28C1/10—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants
- B28C1/14—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants specially adapted for homogenising, comminuting or conditioning clay in non-fluid condition or for separating undesired admixtures therefrom
- B28C1/16—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants specially adapted for homogenising, comminuting or conditioning clay in non-fluid condition or for separating undesired admixtures therefrom for homogenising, e.g. by mixing, kneading ; forcing through slots
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C1/00—Apparatus or methods for obtaining or processing clay
- B28C1/10—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants
- B28C1/14—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants specially adapted for homogenising, comminuting or conditioning clay in non-fluid condition or for separating undesired admixtures therefrom
- B28C1/18—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants specially adapted for homogenising, comminuting or conditioning clay in non-fluid condition or for separating undesired admixtures therefrom for comminuting clay lumps
- B28C1/187—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants specially adapted for homogenising, comminuting or conditioning clay in non-fluid condition or for separating undesired admixtures therefrom for comminuting clay lumps using co-operating rotating elements, e.g. cutters
Abstract
The invention discloses a kind of Homogeneous Aqueous rate manipulated soil device for formulating, including mixed processing device, the first overhanging interface, the second overhanging interface, the first air blower, the first ventilation duct, the second air blower, the second ventilation duct, soil container, water container and flow control cabinet, the present apparatus just makes water and grogs uniformly contact as much as possible in water and soil contact phase, avoids the granule phenomenon caused by grogs and water contact are uneven；And device adds grinding passage, the gap of passage can select the gear-shaped grinding wheel of respective diameters according to test requirements document, the grogs of Pass Test requirement directly can enter stirring cabin by grinding passage, if also granule, abrasion wheel grinding can then be passed through, granule is further eliminated, and two gear-shaped grinding wheel gaps also can adjust, and avoid soil particle being damaged in itself during abrasion wheel grinding；Agitator twists sheet agitating paddle and vertical paliform stirring steel wire using horizontal direction, and both are rotated simultaneously, and the soil in stirring cabin can be made to stir more uniform.
Description
Technical field
The invention belongs to laboratory soil test field, more particularly to a kind of Homogeneous Aqueous rate manipulated soil device for formulating and its
Application in soil test.
Background technology
This soil's water content is the quality and grogs mass ratio of native reclaimed water, generally in percentage.Geotechnique's examination indoors
In testing, soil's water content is generally determined with " oven drying method ", and appropriate soil is put into and contains native box, opens the lid and is put into baking oven, in 105-
It is dried to the quality of the water lost during constant under 110 DEG C of constant temperature and the mass ratio of dry ground after drying is survey soil aqueous
Rate.
The soil sample of Homogeneous Aqueous rate is made, is before carrying out a variety of conventional soil tests such as staight scissors, three axles, consolidation
Carry.《Standard for test methods of earthworks (GBT 50123-1999)》The soil sample for preparing Homogeneous Aqueous rate is specified below：It will grind
Scattered air-dried soil sample is taken under sieve enough soil samples, is stirred, determine its and air-dry moisture content by aperture 2 or 5mm sieve,
The water that should be added is calculated according to target moisture content difference, the air-dried soil sample of sieving is laid in enamel bowl, water is sprayed on
Load in soil sample, after fully mixing thoroughly in soil container and cover tightly, soak diel.
According to《Standard for test methods of earthworks (GBT 50123-1999)》Regulation sample preparation, obtained sample effect not only and
The air-dried soil sample thickness being laid in enamel bowl, the device-dependent used of spraying water, temperature when also and stirring, stir duration, behaviour
The qualification of author has substantial connection.This method wastes time and energy and needs to be accomplished manually.
Because cohesive soil has higher viscosity, and the uniform of perfect condition difficult to realize of manually spraying water, necessarily cause to spray
Some grogs region moisture content are high after water, and the grogs moisture content in some regions is low, therefore " granule " phenomenon occurs after stirring.If
Contain granule in soil sample, then hit and fill out the sample come and just have cellular, will have a significant impact to result of the test.Native land sample
It is required for manually breaing up granule in whipping process, this needs to consume very big energy, and efficiency is low.
The content of the invention
Instant invention overcomes in the prior art the shortcomings that, there is provided a kind of Homogeneous Aqueous rate manipulated soil device for formulating and its
Application in soil test.
In order to solve the above-mentioned technical problem, the present invention is achieved by the following technical solutions：
A kind of Homogeneous Aqueous rate manipulated soil device for formulating, including mixed processing device, the first overhanging interface, second overhanging connect
Mouth, the first air blower, the first ventilation duct, the second air blower, the second ventilation duct, soil container, water container and flow control cabinet；
The water and soil stirring cabin that mixed processing device is contacted cabin, the grinding passage at middle part and bottom by the water and soil on top is formed,
Water and soil contact cabin above be provided with vent window, water and soil contact cabin at left and right sides of be respectively arranged with the first overhanging interface and
Second overhanging interface, is arranged side by side the gear-shaped grinding wheel that gear contacts with each other vertically in grinding passage, and cabin is stirred in water and soil
Bottom center is provided with rotary shaft, and the rotary shaft is connected with being arranged at the motor of mixed processing bottom of device, on the rotary shaft
It is symmetrically arranged with and twists sheet blade and stirring steel wire, twists sheet blade laterally to set, stirring steel wire is longitudinally disposed, in water and soil
The side in stirring cabin is provided with water and soil stirring hatch door；
The first overhanging interface connects the first ventilation duct, and the first ventilation duct connects the first air blower, overhanging is connect first
Steel pipe is vertically installed with mouthful, steel pipe upper end connection soil container, earth material flow control valve is provided with steel pipe；
The second overhanging interface connects the second ventilation duct, and the second ventilation duct connects the second air blower, overhanging is connect second
Water container is provided with mouthful, water container connection booster pump, booster pump connection atomizer, it is overhanging that atomizer stretches into second
In interface and outlet contacts cabin towards water and soil；
The flow control upper box part is provided with control line interface, controls and control line is connected on line interface, control line difference
Earth material flow control valve and flow of inlet water control valve are connected, earth material flow indication screen, soil are provided with flow control cabinet
Stream amount Edit button, flow of inlet water display screen, flow of inlet water Edit button, flow control button, numeric keypad and flow control
Case switch processed.
Moreover, described gear-shaped grinding wheel is divided into upper gear shape emery wheel and lower teeth colyliform emery wheel, upper gear shape sand
Wheel is connected by bearing with the motor of outside adjustable speed.
Moreover, described soil container is in funnel-form.
Moreover, described water container exterior clear, and surface is provided with scale, is easy to observe internal water.
Moreover, described vent window quantity is fanned for 2-4, the top paving of vent window is enclosed with nylon cloth, for preventing from spraying
The soil particle for entering mixed processing device flies out from vent window.
Moreover, it is provided with screw switch on described water and soil stirring hatch door.
A kind of Homogeneous Aqueous rate manipulated soil device for formulating described in above-mentioned technical proposal is when being used：
Flow control valve and flow of inlet water control valve are controlled by flow control cabinet, remold soil particle and by
Fine and close, the uniform water smoke that atomizer sprays respectively enters water and soil contact cabin, can be with the wind action of air blower blowout
Water and soil contact cabin is gradually filled with, so as to uniformly mix, after closing air blower, the water and soil mixture in water and soil contact cabin can be
Water and soil contact bilge portion, under the drive of gear-shaped grinding wheel, the less aqueous grogs of a part of particle are down in the presence of gravity
Water and soil stirring cabin directly is reached by grinding the gap in passage, the larger aqueous mass of soil grain of another part particle can be by gear-like
Abrasion wheel grinding stirs cabin to meeting the requirements and then reaching water and soil；Twist the band of sheet agitating paddle and paliform stirring steel wire in rotary shaft
Mass of soil grain is stirred under dynamic, stirring hatch door by water and soil after the completion of stirring carries out unloading soil.
Compared with prior art, the beneficial effects of the invention are as follows：Homogeneous Aqueous rate soil is prepared with traditional artificial or machine
Method compare, with the device prepare specific Homogeneous Aqueous rate can not only less human input, eliminate human error, also have as follows
Advantage：Just water and grogs is uniformly contacted as much as possible in water and soil contact phase, avoid caused by grogs and water contact are uneven
Granule phenomenon；And device adds grinding passage, the gap of passage can select the gear-like sand of respective diameters according to test requirements document
Wheel, the grogs of Pass Test requirement directly can enter stirring cabin by grinding passage, if also granule, can be ground by emery wheel
Mill, further eliminates granule, two gear-shaped grinding wheel gaps also can adjust, and avoid making soil particle in itself during abrasion wheel grinding
Into destruction；Agitator twists sheet agitating paddle and vertical paliform stirring steel wire using horizontal direction, and both rotate simultaneously, can
So that the soil in stirring cabin stirs more uniform.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
Wherein, 1, helical mount；2nd, flow control cabinet；3rd, flow control cabinet switchs；4th, numeric keypad；5th, earth material flow is compiled
Collect button；6th, earth material flow indication screen；7th, flow of inlet water Edit button；8th, flow of inlet water display screen；9th, flow control button；
10th, line interface is controlled；11st, control line；12nd, the first air blower；13rd, the first ventilation duct；14th, the first overhanging interface；15th, steel pipe；
16th, flow control valve；17th, soil container；18th, vent window；19；Mixed processing device；20th, water and soil contact cabin；21st, gear-like
Emery wheel；22nd, passage is ground；23rd, water and soil stirring cabin；24th, sheet blade is twisted；25th, motor；26th, water container；27th, scale；28、
Booster pump；29th, atomizer；30th, water pipe；31st, rotary shaft；32nd, steel wire is stirred；33rd, water and soil stirring hatch door；34th, screw switch；
35th, the second air blower；36th, the second ventilation duct；37th, the second overhanging interface；38th, flow of inlet water control valve.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings：
As shown in FIG., a kind of Homogeneous Aqueous rate manipulated soil device for formulating, including mixed processing device, first overhanging connect
Mouth, the second overhanging interface, the first air blower, the first ventilation duct, the second air blower, the second ventilation duct, soil container, water container
With flow control cabinet；
The water and soil stirring cabin that mixed processing device is contacted cabin, the grinding passage at middle part and bottom by the water and soil on top is formed,
Water and soil contact cabin above be provided with vent window, water and soil contact cabin at left and right sides of be respectively arranged with the first overhanging interface and
Second overhanging interface, is arranged side by side the gear-shaped grinding wheel that gear contacts with each other vertically in grinding passage, and cabin is stirred in water and soil
Bottom center is provided with rotary shaft, and the rotary shaft is connected with being arranged at the motor of mixed processing bottom of device, on the rotary shaft
It is symmetrically arranged with and twists sheet blade and stirring steel wire, twists sheet blade laterally to set, stirring steel wire is longitudinally disposed, in water and soil
The side in stirring cabin is provided with water and soil stirring hatch door；
The first overhanging interface connects the first ventilation duct, and the first ventilation duct connects the first air blower, overhanging is connect first
Steel pipe is vertically installed with mouthful, steel pipe upper end connection soil container, earth material flow control valve is provided with steel pipe；
The second overhanging interface connects the second ventilation duct, and the second ventilation duct connects the second air blower, overhanging is connect second
Water container is provided with mouthful, water container connection booster pump, booster pump connection atomizer, it is overhanging that atomizer stretches into second
In interface and outlet contacts cabin towards water and soil；
The flow control upper box part is provided with control line interface, controls and control line is connected on line interface, control line difference
Earth material flow control valve and flow of inlet water control valve are connected, earth material flow indication screen, soil are provided with flow control cabinet
Stream amount Edit button, flow of inlet water display screen, flow of inlet water Edit button, flow control button, numeric keypad and flow control
Case switch processed.
Moreover, described gear-shaped grinding wheel is divided into upper gear shape emery wheel and lower teeth colyliform emery wheel, upper gear shape sand
Wheel is connected by bearing with the motor of outside adjustable speed.
Moreover, described soil container is in funnel-form.
Moreover, described water container exterior clear, and surface is provided with scale, is easy to observe internal water.
Moreover, described vent window quantity is 2 fans, the top paving of vent window is enclosed with nylon cloth, for preventing from being injected into
The soil particle of mixed processing device flies out from vent window.
Moreover, it is provided with screw switch on described water and soil stirring hatch door.
The associated technical parameters of each part are as described below above：
Gear-shaped grinding wheel 21 diameter R200-208mm, two gear-shaped grinding wheel slot spacing 1mm-5mm；
The size of flow control cabinet 2 is 1000mm × 800mm × 500mm；
Soil container 17 is funnel-form, volume 5000cm3；
Water container 27 with a scale is cylindric, volume 6000cm3；
The maximum stream flow 2000cm of flow control valve 163/min；
The lift 3m of booster pump 28, controllable rotating speed 0-2000r/min；
Air blower 12 can adjust wind speed range 2-20m/s；
Water and soil contacts the preferred size of cabin 20
Preferred size B300mm × the H100mm of interface 14 is stretched in water and soil contact out of my cabin；
The water and soil contact preferred size of cabin overdraught window 18 is B150mm；
Grind the preferred size of passage 22Two gear-shaped grinding wheel slot spacing 1mm, it is and upper
The outside adjustable speed motor range of speeds that portion's gear-shaped grinding wheel is connected by bearing is 0-500r/min；
Stirring the preferred size of cabin 23 isThe preferred height of agitating paddle centre rotational axis 31
H450mm, left side twist the preferable width B30mm of sheet blade 24, the right side paliform stirring preferred size of steel wire 32To stir
The external motor 25 for mixing oar offer power is variable-frequency motor, and its range of speeds is 0-1500r/min；
The manipulated soil of the present invention obtains the compound method of specific Homogeneous Aqueous rate：By whole device as the level land in space
On, regulation screw support 1 makes flow control cabinet 2 and device for formulating 19 horizontal；Flow control cabinet is controlled into line interface 10 and flow
Control valve 16 is connected firmly with connecting line 11, and air blower 12 is contacted with water and soil and stretches the vent hose connection jail of interface 14 out of my cabin
Gu；The amount of water needed for the manipulated soil of experiment needs is calculated by needing the moisture content meter that reaches, in the present embodiment, is air-dried and is remolded
Soil weight 1000g, moisture content 4.2%, is intended to its moisture content being configured to 18%, then amount of water mW=1000 × 0.01 × (18-
4.2)/(1+0.01 × 4.2)=132.438g, adds corresponding water in water container 26, adds and tries in soil container 17
Ground needed for testing and dissipate, air-dry manipulated soil amount；The power switch 3 of flow control cabinet 2 is opened, passes through earth material flow editing key 5, feed water flow
Amount editing key 7 and numeric keypad 4 are set to water, native flow；Open air blower 12, booster pump 28, tooth connection colyliform emery wheel
The motor of 21 centre rotational axis, the motor 25 for connecting agitating paddle centre rotational axis；Press the operation button 9 on down-off control cabinet 2.
Dang Shui, soil contact cabin 20 completely into water and soil, after closing 3,1min of flow control cabinet switch, close air blast 12.When all soil
After grinding passage 22 enters stirring cabin 23, the motor of connection emery wheel is closed, after 2min, regulation motor 25, increases its rotating speed,
It is rotated backward after 5~10min, closing motor 25 switchs after rotating 5~10min, opens stirring cabin offside door 33, takes out system
Good soil sample.
The present invention is described in detail above, but the content is only presently preferred embodiments of the present invention, it is impossible to recognized
For the practical range for limiting the present invention.Any changes and modifications in accordance with the scope of the present application, all should still it return
Belong within the patent covering scope of the present invention.
Claims (7)
- A kind of 1. Homogeneous Aqueous rate manipulated soil device for formulating, it is characterised in that：Including mixed processing device, the first overhanging interface, Second overhanging interface, the first air blower, the first ventilation duct, the second air blower, the second ventilation duct, soil container, water container and Flow control cabinet；The water and soil stirring cabin that mixed processing device is contacted cabin, the grinding passage at middle part and bottom by the water and soil on top is formed, in water Soil contact is provided with vent window above cabin, and the first overhanging interface and second are respectively arranged with left and right sides of water and soil contact cabin Overhanging interface, the gear-shaped grinding wheel that gear contacts with each other is arranged side by side vertically in grinding passage, in water and soil stirring bilge portion Center is provided with rotary shaft, and the rotary shaft is connected with being arranged at the motor of mixed processing bottom of device, on the rotary shaft symmetrically It is provided with and twists sheet blade and stirring steel wire, twist sheet blade laterally to set, stirring steel wire is longitudinally disposed, is stirred in water and soil The side in cabin is provided with water and soil stirring hatch door；The first overhanging interface connects the first ventilation duct, and the first ventilation duct connects the first air blower, on the first overhanging interface Steel pipe is vertically installed with, steel pipe upper end connection soil container, earth material flow control valve is provided with steel pipe；The second overhanging interface connects the second ventilation duct, and the second ventilation duct connects the second air blower, on the second overhanging interface Water container, water container connection booster pump are provided with, booster pump connects atomizer, and atomizer stretches into the second overhanging interface Interior and outlet contacts cabin towards water and soil；The flow control upper box part is provided with control line interface, controls and connects control line on line interface, control line connects respectively Earth material flow control valve and flow of inlet water control valve, earth material flow indication screen, earth material stream are provided with flow control cabinet Measure Edit button, flow of inlet water display screen, flow of inlet water Edit button, flow control button, numeric keypad and flow control cabinet Switch.
- A kind of 2. Homogeneous Aqueous rate manipulated soil device for formulating according to claim 1, it is characterised in that：Described gear-like Emery wheel is divided into upper gear shape emery wheel and lower teeth colyliform emery wheel, and upper gear shape emery wheel passes through bearing and the electricity of outside adjustable speed Machine is connected.
- A kind of 3. Homogeneous Aqueous rate manipulated soil device for formulating according to claim 1, it is characterised in that：Described Sheng soil holds Device is in funnel-form.
- A kind of 4. Homogeneous Aqueous rate manipulated soil device for formulating according to claim 1, it is characterised in that：The described appearance that is filled with water Device exterior clear, and surface is provided with scale, is easy to observe internal water.
- A kind of 5. Homogeneous Aqueous rate manipulated soil device for formulating according to claim 1, it is characterised in that：Described vent window Quantity is 2-4 fans, and the top paving of vent window is enclosed with nylon cloth, for preventing from being injected into the soil particle of mixed processing device from logical Air regulator flies out.
- A kind of 6. Homogeneous Aqueous rate manipulated soil device for formulating according to claim 1, it is characterised in that：Described water and soil stirs Mix and screw switch is provided with hatch door.
- A kind of 7. application of Homogeneous Aqueous rate manipulated soil device for formulating in soil test, it is characterised in that：According to the following steps Carry out, flow control valve and flow of inlet water control valve are controlled by flow control cabinet, remold soil particle and by mist Change fine and close, the uniform water smoke that nozzle sprays and respectively enter water and soil contact cabin, can be by under the wind action of air blower blowout Gradually full of water and soil contact cabin, so as to uniformly mix, after closing air blower, the water and soil mixture in water and soil contact cabin can be in weight Water and soil contact bilge portion is down in the presence of power, under the drive of gear-shaped grinding wheel, the less aqueous grogs of a part of particle is straight The gap connected in grinding passage reaches water and soil stirring cabin, and the larger aqueous mass of soil grain of another part particle can be by gear-like sand Wheel, which is ground to, meets the requirements and then reaches water and soil stirring cabin；Twist the drive of sheet agitating paddle and paliform stirring steel wire in rotary shaft Under mass of soil grain is stirred, after the completion of stirring by water and soil stir hatch door carry out unloading soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710620011.3A CN107351241B (en) | 2017-07-26 | 2017-07-26 | Uniform water content remolded soil preparation device and application thereof in soil test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710620011.3A CN107351241B (en) | 2017-07-26 | 2017-07-26 | Uniform water content remolded soil preparation device and application thereof in soil test |
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| Publication Number | Publication Date |
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| CN107351241A true CN107351241A (en) | 2017-11-17 |
| CN107351241B CN107351241B (en) | 2022-12-20 |
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| CN201710620011.3A Active CN107351241B (en) | 2017-07-26 | 2017-07-26 | Uniform water content remolded soil preparation device and application thereof in soil test |
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|---|---|---|---|---|
| US5823667A (en) * | 1996-03-19 | 1998-10-20 | Pacific Machinery & Engineering Co., Ltd. | Mixer having a segmented helical mixing blade |
| CN201419438Y (en) * | 2009-06-15 | 2010-03-10 | 力帆实业(集团)股份有限公司 | Fatlute recovering device |
| CN202502007U (en) * | 2012-02-17 | 2012-10-24 | 中国矿业大学 | Preparation apparatus for remolded soil with specific water content |
| CN204036651U (en) * | 2014-08-18 | 2014-12-24 | 沭阳县洪青新型建筑材料厂 | A kind of cement special agitating apparatus with refrigerating function |
| CN104535397A (en) * | 2015-01-23 | 2015-04-22 | 中国矿业大学 | Configuration device and method for clayey soil samples with specific moisture content |
| CN205361592U (en) * | 2015-12-22 | 2016-07-06 | 江西省欧陶科技有限公司 | Large -scale water -reducing agent crystallization rubbing crusher |
| CN207027862U (en) * | 2017-07-26 | 2018-02-23 | 天津大学 | A kind of Homogeneous Aqueous rate manipulated soil device for formulating |
-
2017
- 2017-07-26 CN CN201710620011.3A patent/CN107351241B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5823667A (en) * | 1996-03-19 | 1998-10-20 | Pacific Machinery & Engineering Co., Ltd. | Mixer having a segmented helical mixing blade |
| CN201419438Y (en) * | 2009-06-15 | 2010-03-10 | 力帆实业(集团)股份有限公司 | Fatlute recovering device |
| CN202502007U (en) * | 2012-02-17 | 2012-10-24 | 中国矿业大学 | Preparation apparatus for remolded soil with specific water content |
| CN204036651U (en) * | 2014-08-18 | 2014-12-24 | 沭阳县洪青新型建筑材料厂 | A kind of cement special agitating apparatus with refrigerating function |
| CN104535397A (en) * | 2015-01-23 | 2015-04-22 | 中国矿业大学 | Configuration device and method for clayey soil samples with specific moisture content |
| CN205361592U (en) * | 2015-12-22 | 2016-07-06 | 江西省欧陶科技有限公司 | Large -scale water -reducing agent crystallization rubbing crusher |
| CN207027862U (en) * | 2017-07-26 | 2018-02-23 | 天津大学 | A kind of Homogeneous Aqueous rate manipulated soil device for formulating |
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| CN107351241B (en) | 2022-12-20 |
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