CN106290795B - A kind of air-dried scattered sieve test device and method of soil sample stone roller of geotechnique's Proctor compaction test - Google Patents
A kind of air-dried scattered sieve test device and method of soil sample stone roller of geotechnique's Proctor compaction test Download PDFInfo
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- CN106290795B CN106290795B CN201610810444.0A CN201610810444A CN106290795B CN 106290795 B CN106290795 B CN 106290795B CN 201610810444 A CN201610810444 A CN 201610810444A CN 106290795 B CN106290795 B CN 106290795B
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- 239000002689 soil Substances 0.000 title claims abstract description 65
- 238000012360 testing method Methods 0.000 title claims abstract description 44
- 238000005056 compaction Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 17
- 241001504664 Crossocheilus latius Species 0.000 title claims description 6
- 239000000463 material Substances 0.000 claims abstract description 31
- 238000012216 screening Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000004927 clay Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 238000007605 air drying Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 239000007921 spray Substances 0.000 claims 1
- 238000002360 preparation method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009837 dry grinding Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000021050 feed intake Nutrition 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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Abstract
It air-dries soil sample the invention discloses a kind of geotechnological Proctor compaction test and grinds and dissipate sieve test device and method, including rack, it is equipped with a motor on the rack, the motor drives a roller rotation by drive apparatus, the both ends of roller are fixed in two support plates each by bearing, being equipped with one in the bottom of roller, there are the sieve plates of the arc-shaped in gap with roller outer surface, the sieve plate two sides are with before, two plate washers are flexibly connected afterwards, before, two plate washers are plugged in two support plates afterwards, before roller is located at, the center of latter two baffle, and guide plate is equipped at the top of roller；Guide plate is also plugged in together with support plate, and the front apron, sieve plate, guide plate and two support plates form material charging region；The bottom of sieve plate is equipped with an inclined splicing plate to the ground, grinds the earth material after dissipating screening and is exported from discharge port by splicing plate.
Description
Technical field
It air-dries soil sample the invention discloses a kind of geotechnological Proctor compaction test and grinds and dissipate sieve test device and method.
Background technique
Compaction test is one of maximum pilot project of labor intensity in soil test.The effective Chinese people of present
In republic's national standard " Standard for test methods of earthworks " GB/T50123-1999, to the regulation of the Proctor compaction test preparation of soil sample
Are as follows: Representative soil sample 20Kg is taken with quartering, air-dries and pulverizes, crosses 5mm sieve, and lower soil sample will be sieved and mixed thoroughly；But it is specific how wind
Dry milling is broken not to provide relevant equipment and method；Therefore currently used method is manually to pulverize, this manually to pulverize
It has the disadvantage in that
For cohesive soil by natural moisture content to during air-drying, the agglomeration of soil can be very closely knit.Currently, laboratory staff
Manually prepare the normal mode of compacted soil samples are as follows: in soil air drying process, break soil block into pieces one by one with axe, then use steel pipe
Or wood rolls, and the soil after rolling is poured into 5mm sieve, the soil sample under sieving mixes rear watering thoroughly and hits reality.This tests soil
Sample preparation test period length, large labor intensity, to pulverize fugitive dust in screening process serious, causes serious air pollution and environment
Pollution, while biggish harm is also brought to the health of testing crew.
Summary of the invention
In order to solve technical disadvantages existing in the prior art, the invention discloses a kind of geotechnological Proctor compaction tests to air-dry
Soil sample, which is ground, dissipates sieve test device and method.
The technical solution adopted by the invention is as follows:
A kind of air-dried scattered sieve test device of soil sample stone roller of geotechnique's Proctor compaction test, including rack, in the rack
Equipped with a motor, the motor drives a roller to rotate by drive apparatus, and the both ends of roller are each by axis
It holds and is fixed in two support plates, being equipped with one in the bottom of the roller, there are the circular arcs in gap with roller outer surface
The sieve plate of shape, the sieve plate two sides are flexibly connected (mode of flexible connection, which can be, to be bolted) with forward and backward two plate washer, described
Forward and backward two plate washer be plugged in two support plates (mode of grafting can be sliding slot or sliding rail), the roller position
Guide plate is equipped in the center of former and later two baffles, and at the top of roller；The guide plate also with the support
Plate is plugged in together (mode of grafting can be sliding slot or sliding rail), the front apron, sieve plate, guide plate and two branch
Fagging forms material charging region；The bottom of the sieve plate is equipped with an inclined splicing plate to the ground, grind the earth material after dissipating screening from
Discharge port is exported by splicing plate.
Further, the sieve plate can unload, for clearing up the sieve pore of remaining soil or cleaning blocking.
Further, the distance between the roller lowermost end and sieve plate are 5mm.
Further, the sieve plate is equipped with several circular holes, and the diameter of circular hole is 5mm.
Further, the motor drives the gear of a pair of meshing by a speed reducer, and the gear drives sieve
Withdrawing roll low speed rotation.
Further, the direction where the roller to front apron rotates；The earth material that the needs grind scattered is placed
In material charging region.
Further, as follows using the method for above equipment geotechnique's Proctor compaction test:
Soil sample is placed in the plane of dry cleansing by step 1, and sunning air-dries；
Soil sample after air-drying is poured into material charging region along front apron, guide plate by step 2, is opened and is air-dried the scattered sieve test of soil sample stone roller
The power switch of device, earth material is pulverized, and the grogs less than 5mm leaks down from sieve pore, is exported under the effect of gravity along splicing plate；
Lower soil sample will be sieved to mix thoroughly, and measure the air-dried moisture content of soil sample；
Step 3 estimates optimum moisture content according to the plastic limit of soil, prepares multiple groups difference by the moisture content for successively differing about 2% and contains
The sample of water rate；
Wherein 2 moisture content are greater than plastic limit, and 2 moisture content are less than plastic limit, and 1 moisture content is close to plastic limit；
Step 4 takes the soil sample of 2.5Kg to be laid in the soil container not absorbed water, by the predetermined moisture content past soil of sprinkler
Amount of water needed for uniformly spraying on sample, it is spare to mix sealing and standing thoroughly, and time of repose is respectively as follows: high liquid limit clay must not be small less than 24
When, low liquid limit clay can take the circumstances into consideration to shorten, but should not be less than 12 hours；
Step 5 weighs a certain amount of earth material from the sample prepared, in points of 3 layers compaction cylinder for pouring into compaction test apparatus and by native face
Reality is hit in leveling, layering.The quality of every layer of earth material is 600-800g, and the native face of two layers of interface should dig hair, and every layer 25 is hit；
Step 6 removes bottom plate along compaction cylinder top equating sample, cleans drum outer wall, weighs accurately to 1g.
Step 7 releases sample from compaction cylinder, and 2 a certain amount of earth materials is taken to be measured in parallel containing for sample from sample center
The Parallel errors of water rate, moisture content should be not more than 1%；
Step 8 successively carries out hitting reality according to sample of the above-mentioned steps to other moisture content；
The dry density and moisture content of sample after reality are hit in step 9 calculating, draw relation curve.
Further, using dry density as ordinate, moisture content is abscissa, and the relationship for drawing dry density and moisture content is bent
Line；Saturated aqueous rate curve is drawn in dry density and moisture content relation curve.
Further, the sample in step 3 at least prepares 5 groups, wherein 2 moisture content are greater than plastic limit, 2 moisture content are less than
Plastic limit, 1 moisture content is close to plastic limit.
The present invention has the beneficial effect that:
Maximum three steps of labor intensity in compaction test (break soil block into pieces, grind scattered and screening) can be replaced by machinery
In generation, is artificial, if manually preparing compacted soil samples using conventional, a people prepares a kind of soil sample and at least needs 1 hour or more, expends
A large amount of human resources.And the geotechnological Proctor compaction test developed air-dries soil sample and grinds and dissipates sieve test device, sample preparation only needs several
Minute, it greatly improves work efficiency, saves the experimentation costs such as human resources.Meanwhile fugitive dust pair is avoided in sample making course
The pollution of air, protects environment.Therefore, which has significant economic and social benefit.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Side view Fig. 1 of the invention；
Sectional view Fig. 2 of the invention；
Fig. 3-1,3-2 are the structure chart of sieve plate；
The structure chart of Fig. 4-1,4-2 support plate；
In figure: 1 rack, 2 motor bases, 3 motors, 4 gear pairs, 5 gear covers, 6 rollers, 7 stiffening plates, 8 support plates, 9
Bearing, 10 sieve plates, 11 guide plates, 12 front aprons, plate washer after 13,14 splicing plates.
Specific embodiment
As shown in Figure 1, 2, geotechnological Proctor compaction test, which air-dries soil sample and grinds, dissipates sieve test device, including rack 1, described
Rack 1 be equipped with a motor 3, the motor drives the rotation of roller 6 by drive apparatus, the two of roller 6
End is fixed in two support plates 8 each by bearing 9, is equipped with one and roller appearance in the bottom of the roller 6
There are the sieve plate 10 of the arc-shaped in gap, 10 two sides of sieve plate are flexibly connected with forward and backward two plate washer 12,13 (to be flexibly connected in face
Mode can be bolted), forward and backward two plate washer 12,13 is plugged in two support plates 8 that (mode of grafting can be cunning
Slot or sliding rail), roller is located at the center of former and later two baffles, and is equipped with guide plate at the top of roller 6；Institute
The guide plate stated also is plugged in together (mode of grafting can be sliding slot or sliding rail), the front apron with the support plate
12, sieve plate 10, guide plate 11 and two support plates 8 form material charging region；The bottom of sieve plate is inclined to the ground equipped with one
Splicing plate 14 grinds the earth material after dissipating screening and is exported from discharge port by splicing plate.
Roller 6 is located at the center of former and later two baffles, and is equipped with a guide plate at the top of roller, makes to need
The earth material for grinding scattered can only be placed on material charging region.
Further, the distance between 6 lowermost end of roller and sieve plate 10 are 5mm.
Further, sieve plate 10 is equipped with several circular holes, and the diameter in hole is 5mm.
Further, motor 3 drives the gear pair 4 of a pair of meshing by a speed reducer, and the gear drives roller
Roller low speed rotation.
Further, roller 6 is rotated to the direction where front apron；The scattered earth material of the needs stone roller, which is placed on, to feed intake
Area.
Further, upper in two support plates to be equipped with stiffening plate 7.
The specific course of work is as follows:
The earth material for needing to grind scattered is put into material charging region, then driving motor, motor drives roller low speed rotation, roller
Roller is rotated to the direction of front apron, and roller constantly rolls soil block in rotary course, is dissipated until soil block is ground, point
Earth material after dissipating crosses the sieve plate of 5mm circular hole, sends out from splicing plate；
In the process, two support plates are removably connect with former and later two baffles；Two sides of sieve plate respectively with
Former and later two baffles are detachably connected；The sieve plate can unload, the sieve of remaining soil or cleaning blocking for clearing up on sieve plate
Hole.
The method for carrying out compaction test using above equipment is as follows:
1. instrument and equipment
1.1 compaction test apparatus: it is made of compaction cylinder, hammer and casing.Its size should meet the regulation of following table.
Compaction test apparatus main component dimensions table
The hammer of 1.2 compaction test apparatus should match guide tube, should have enough gaps to make hammer can free-falling between hammer and guide tube.It is electronic
The hammer of operation must have control fall away from tracking equipment and hammer point set by certain angle (light-duty 53.5 °) is equally distributed
It is standby.
1.3 electronic balances: 200 are weighed, scale division value 0.01g.
1.4 platform balances: 10kg, scale division value 5g are weighed.
1.5 sample pushers: screw jack or hydraulic jack are preferably used.Such as without such equipment, scraper can be also used
Sample is taken out from compaction cylinder with native knife is repaired.
1.6 other: baking oven, sprinkler grind native sieve test equipment, soil filling device, repair native knife etc..
2. specific test method:
The preparation of 2.1 samples
2.1.1 Representative soil sample 20kg is taken, soil sample is placed in the plane of dry cleansing, sunning air-dries.After air-drying
Soil sample pours into material charging region along front apron and guide plate, opens and air-dries the power switch that soil sample grinds scattered sieve test device, by earth material
It pulverizes, the grogs less than 5mm leaks down from sieve pore, exports under the effect of gravity along splicing plate；Lower soil sample will be sieved to mix thoroughly, and measured
The air-dried moisture content of soil sample.
2.1.2 optimum moisture content is estimated according to the plastic limit of soil, no less than five should be prepared by the moisture content for successively differing about 2%
The sample of the different water cut of group, wherein should have 2 moisture content to be greater than plastic limit, 2 moisture content are less than plastic limit, and 1 moisture content connects
Nearly plastic limit.It is calculated by formula (1) and answers amount of water:
In formula: mωAdd water quality, g needed for soil sample；
M- air-dries quality of soil sample when moisture content, g；
ω0Air-dry moisture content, %；
Moisture content required by ω-soil sample, %.
2.1.3 the soil sample of 2.5Kg is taken to be laid in the soil container not absorbed water, by the predetermined moisture content past soil of sprinkler
Amount of water needed for uniformly spraying on sample, it is spare to mix sealing and standing thoroughly.Time of repose is respectively as follows: high liquid limit clay must not be small less than 24
When, low liquid limit clay can take the circumstances into consideration to shorten, but should not be less than 12 hours.
2.2 examination sample compactings
2.2.1 compaction test apparatus is placed on solid ground, compaction cylinder is connected with pedestal, installs casing, inspection apparatus
Whether the performance of each component and corollary equipment is normal, uniformly applies a thin layer lubricating oil in compaction cylinder inner wall.
2.2.2 weigh a certain amount of earth material from a test specimen prepared, points 3 layers pour into it is in compaction cylinder and native face is whole
Flat, reality is hit in layering.Light-duty compacting process points 3 layers are hit reality, and the quality of every layer of earth material is that (its amount should make to hit sample after reality to 600-800g
Height is slightly above the 1/3 of compaction cylinder), every layer 25 is hit.Every layer of specimen height after hitting reality is preferably roughly equal, the soil of two layers of interface
Face should dig hair.It hits after the completion of reality, the specimen height beyond compaction cylinder top should be less than 6mm.
2.2.3 it with after repairing native knife and cutting digging along casing inner wall, twists and removes casing.Along compaction cylinder top carefulness equating sample,
Bottom plate is removed, equating is also answered beyond outside cylinder in bottom surface as samples.Drum outer wall is cleaned, is weighed, accurately to 1g.
2.2.4 sample is released with bulldozing device from compaction cylinder, 2 a certain amount of earth materials is taken to be measured in parallel from sample center
The Parallel errors of the moisture content of sample, moisture content should be not more than 1%.
2.2.5 it by step 2.2.1~2.2.4 provides that the sample of other moisture content is successively carried out hitting reality.It does not repeat generally
Use soil sample.
3 test results arrange
3.1 calculation formula
3.1.1 the dry density of sample after hitting reality is calculated by formula (2):
In formula: ρdDry density, g/cm3；
ρ-wet density, g/cm3；
ω-moisture content, %.
It calculates to 0.01g/cm3。
3.1.2 saturated aqueous rate native under several dry densities is calculated by formula (3):
In formula: ωsatThe saturated aqueous rate of sample, %；
ρwThe density of water, g/cm at 4 DEG C of temperature3；
ρdThe dry density of sample, g/cm3；
GsSoil particle specific gravity.
3.2 draw relation curve
3.2.1 using dry density as ordinate, moisture content is abscissa, draws the relation curve of dry density and moisture content.It is bent
The ordinate of line upward peak point represents the maximum dry density for hitting real sample, and corresponding abscissa is hit real sample optimal aqueous
Rate.When curve cannot draw peak point, complement point should be carried out.Soil sample should not be reused.
3.2.2 saturated aqueous rate curve is drawn in dry density and moisture content relation curve.
The correction of 3.3 achievements
3.3.1 in geotechnological Proctor compaction test, when granular mass of the partial size greater than 5mm is less than sample gross mass in sample
When 30%, reply maximum dry density is corrected, and updating formula is shown in formula (4).
In formula: ρ 'dmaxMaximum dry density after correction, g/cm3；
P- partial size is greater than the mass percent (%) of 5mm soil；
GS2Partial size is greater than the saturated surface dry specific gravity of 5mm grogs；
ρωThe density of water, g/cm3；
ρdmax- partial size is less than the maximum dry density of 5mm sample, g/cm3。
It calculates to 0.01g/cm3。
3.3.2 in geotechnological Proctor compaction test, when granular mass of the partial size greater than 5mm is less than sample gross mass in sample
30% when, also need to be corrected optimum moisture content, updating formula is shown in formula (5).
ω′op=ωop(1-P)+P·ω2 (5)
In formula: ωopOptimum moisture content after '-correction, %；
ωopHit the optimum moisture content of real sample, %；
ω2Partial size is greater than the sorption moisture content of 5mm grogs, %.
Remaining symbol is same as above.It calculates to 0.01%.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (4)
1. a kind of geotechnique's Proctor compaction test, which air-dries soil sample and grinds, dissipates sieve test device, which is characterized in that including rack, described
Rack be equipped with a motor, the motor drives the rotation of roller by drive apparatus, and the both ends of roller are each
From being fixed on by bearing in two support plates, it is equipped between one and the presence of roller outer surface in the bottom of the roller
The sieve plate of the arc-shaped of gap, the sieve plate two sides are flexibly connected with forward and backward two plate washer, and forward and backward two plate washer passes through sliding slot
Or sliding rail is plugged in two support plates, the roller is located at the center of former and later two baffles, and in roller
Top is equipped with guide plate；The guide plate is also plugged in together with the support plate, and inserting mode is sliding slot or slide rail type
Grafting；Front apron, sieve plate, guide plate and two support plates form material charging region；The bottom of the sieve plate is equipped with one
A splicing plate inclined to the ground grinds the earth material after dissipating screening and is exported from discharge port by splicing plate；
Direction where from the roller to front apron rotates；
Motor drives the gear pair of a pair of meshing by a speed reducer, and the gear drives roller low speed rotation；
The distance between described roller lowermost end and sieve plate are 5mm；
The sieve plate is equipped with several circular holes, and the diameter in hole is 5mm.
2. the method for carrying out geotechnological Proctor compaction test using device described in claim 1, which is characterized in that as follows:
Soil sample is placed in the plane of dry cleansing by step 1, and sunning air-dries；
Soil sample after air-drying is poured into material charging region along front apron and guide plate by step 2, is opened and is air-dried the scattered sieve test dress of soil sample stone roller
The power switch set, earth material is pulverized, and the grogs less than 5mm leaks down from sieve pore, is exported under the effect of gravity along splicing plate；It will
It sieves lower soil sample to mix thoroughly, and measures the air-dried moisture content of soil sample；
Step 3 estimates optimum moisture content according to the plastic limit of soil, prepares multiple groups different water cut by the moisture content for successively differing about 2%
The sample of rate；
Step 4 takes the soil sample of 2.5Kg to be laid in the soil container not absorbed water, by predetermined moisture content sprinkler toward soil sample
It is upper uniformly spray needed for amount of water, mix that sealing and standing is spare, and time of repose is respectively as follows: high liquid limit clay must not be small less than 24 thoroughly
When, low liquid limit clay can take the circumstances into consideration to shorten, but should not be less than 12 hours；
Step 5 weighs a certain amount of earth material from the sample prepared, and point 3 layers of compaction cylinder for pouring into compaction test apparatus are interior and native face is whole
Flat, reality is hit in layering.The quality of every layer of earth material is 600-800g, and the native face of two layers of interface should dig hair, and every layer 25 is hit；
Step 6, along compaction cylinder top equating sample, remove bottom plate, clean drum outer wall, weigh accurately to 1g；
Step 7 releases sample from compaction cylinder, and 2 a certain amount of earth materials is taken to be measured in parallel the aqueous of sample from sample center
The Parallel errors of rate, moisture content should be not more than 1%；
Step 8 successively carries out hitting reality according to above-mentioned steps to the sample of other moisture content；
Step 9, calculating hit the dry density and moisture content of sample after reality, draw relation curve.
3. the method for geotechnique's Proctor compaction test as claimed in claim 2, which is characterized in that the sample in step 3 is at least made
Standby 5 groups, wherein 2 moisture content are greater than plastic limit, 2 moisture content are less than plastic limit, and 1 moisture content is close to plastic limit.
4. the method for geotechnique's Proctor compaction test as claimed in claim 2, which is characterized in that using dry density as ordinate, contain
Water rate is abscissa, draws the relation curve of dry density and moisture content；It draws and is saturated in dry density and moisture content relation curve
Plot of water cut.
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| CN109211642A (en) * | 2018-11-14 | 2019-01-15 | 中国科学院、水利部成都山地灾害与环境研究所 | The soil sample makeup that is made into one is set |
| CN115015519B (en) * | 2022-05-06 | 2023-11-07 | 中原工学院 | Geotechnical engineering test device |
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| GB2200858A (en) * | 1987-02-06 | 1988-08-17 | Energiagazdalkodasi Intezet | Process for grinding and drying geologically young peat, lignine, soft brown coal and energetic coals, and preparing them for pulverized-coal combustion |
| CN2669985Y (en) * | 2003-12-22 | 2005-01-12 | 冯智勇 | Improved wet mill |
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| CN204503282U (en) * | 2015-01-30 | 2015-07-29 | 河南健康源生物科技有限公司 | One waves pulverizer |
| CN205435969U (en) * | 2016-03-14 | 2016-08-10 | 江西怡杉环保股份有限公司 | A smash agitating unit for heavy metal contaminated soil administers |
| CN205982267U (en) * | 2016-09-08 | 2017-02-22 | 山东省水利科学研究院 | Size analysis device that looses is ground to geotechnique proctor compaction test air -dried soil appearance |
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| CN106290795A (en) | 2017-01-04 |
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