CN107422106B - A kind of method of the anti-isolation characteristic of in situ quantitation assessment fresh concrete material - Google Patents
A kind of method of the anti-isolation characteristic of in situ quantitation assessment fresh concrete material Download PDFInfo
- Publication number
- CN107422106B CN107422106B CN201710656480.0A CN201710656480A CN107422106B CN 107422106 B CN107422106 B CN 107422106B CN 201710656480 A CN201710656480 A CN 201710656480A CN 107422106 B CN107422106 B CN 107422106B
- Authority
- CN
- China
- Prior art keywords
- concrete
- fresh concrete
- slump
- time
- compactioncan
- Prior art date
- 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.)
- Active
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 120
- 239000000463 material Substances 0.000 title claims abstract description 23
- 238000002955 isolation Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 29
- 239000000203 mixture Substances 0.000 claims abstract description 24
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical group C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000005056 compaction Methods 0.000 claims description 10
- 238000010998 test method Methods 0.000 claims description 6
- 230000001133 acceleration Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 230000009885 systemic effect Effects 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 239000000839 emulsion Substances 0.000 claims 1
- 238000002474 experimental method Methods 0.000 abstract description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
Classifications
-
- 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
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a kind of methods for calculating the anti-isolation characteristic of in situ quantitation assessment fresh concrete material based on compactioncan, experimental provision has standard slump cone, slump bottom plate, wooden mallet and tape measure, fresh concrete is packed into slump cone by specification, and carefully the upper surface of concrete is equably scraped with trowel or similar means, the round coloured surface that phenolphthalein solution forms reddish violet is sprayed on slump cylinder top layer fresh concrete surface, after the progress slump experiment of fresh concrete sample, slump bottom plate is rammed using wooden mallet, make concrete mix sample deformations by back plate vibration, until slump flow test reaches designated value, observe the anti-isolation characteristic of the state of fresh concrete and the profile variations assessment fresh concrete material of round coloured surface.
Description
Technical field
The present invention relates to technical field of civil engineering, and it is special to be related to a kind of anti-isolation of in situ quantitation assessment fresh concrete material
The method of property.
Background technique
The isolation of concrete refers to since the cohesive strength deficiency between concrete mix composition material causes under coarse aggregate
Heavy, mixture ingredient is separated from each other, to cause the non-uniform phenomenon of internal the Nomenclature Composition and Structure of Complexes.When bone in concrete material component
When material and additive are of less types, the factor for influencing agent on crack resistance of concrete segregability is seldom, therefore can pass through slump consistancy test
Material consistency is determined to be evaluated indirectly the education resistance of concrete.However, the function when concrete material is more next
It is more various, also it is difficult individually to be tested according to the slump at this time just necessarily containing there are many aggregate and additive in mixture component
To assess the education resistance of concrete material.
Therefore, when mixture component is complex, by the anti-isolation ability of slump assessment material, this experience is sentenced
Disconnected way is with regard to less feasible.The method that part researcher also proposed several test fresh concrete education resistances, but
It is most of to need to cause these methods to be difficult to be widely used in building-site using new equipment.Generally on-site, exist
When assessing the education resistance of concrete mix, progress slump consistancy test usually carries out slump plate rammer after this first
It is real, the education resistance energy of concrete is assessed by observation concrete deformation.But this method not yet proposes one and explicitly comments
Estimate standard, i.e., does not specifically note that slump plate should be rammed the much degree of actual arrival.In summary, it is necessary to propose a kind of quantitative
The method for assessing the anti-isolation characteristic of fresh concrete material.
Summary of the invention
Technical problem solved by the invention is that the calculating of energy is completed based on compacting, assesses fresh concrete in situ quantitation
The method of the anti-isolation characteristic of material.
In order to solve the above-mentioned technical problem, the technical solution of the present invention is as follows: a kind of in situ quantitation assessment concrete material is anti-
Isolate the test method of performance, which comprises the following steps:
Step 1: fresh concrete is packed into slump cone by concrete batching mixture, and by the upper surface of concrete
Equably strike off；
Step 2: spraying phenolphthalein solution on slump cone fresh concrete surface suitable for reading, form the colored circular wheel of reddish violet
It is wide；
Step 3: preparing the concrete mix of different ratio, initial compacting rate γ is measured by experimental provisioni, using new
The abundant compactioncan of mixed concrete displacement course curve equation calculation fresh concrete, to calculate its vibration using compactioncan formula
To compaction state time t1,t2……tn；The experimental provision includes shake table, and the shake table includes two with particular amplitude
The opposite of vibration is eccentrically rotated motor, for recording the computer of data, for adjusting shake table frequency and acceleration
Control panel, cylinder, standard slump cylinder, slump bottom plate, wooden mallet, tape measure, the size of standard slump cylinder are back cut diameter 100mm,
Lower port diameter 200mm, high 300mm.
Specific calculating process is as follows:
Step 3.1: floor space is that the cylinder of A is fixed on a vibration table, and the fresh concrete of quality m is placed on cylinder
In, the height h of cylinder inner concrete is measured, compacting rate at this time is γi, the calculation formula of compacting rate are as follows:
Wherein, γ is concrete compacting rate, H0Height of specimen when compaction state abundant for fresh concrete in cylinder mixes
The abundant compaction state for coagulating soil is the state for being compacted to theoretical density, and h is the fresh concrete height of given compacting time；
Step 3.2: starting shake table, time of vibration t1, the height h of record cylinder inner concrete1, calculate compacting rate at this time
γ1.Continue to be vibrated to time t2, the height h of record cylinder inner concrete2, calculate compacting rate γ at this time2, fresh concrete is in t
Interior absorption compactioncan is represented by the following formula:
Wherein, EtIt is fresh concrete in t time systemic compactioncan, unit J/L, t are the compacting time, and unit is
S, αmaxFor the acceleration of shake table, f is vibration frequency, and ρ is the theoretical density of fresh concrete.Calculate t1、t2It is stylish to mix coagulation
Soil compaction energy E1、E2；
Step 3.3: fresh concrete displacement course curve equation are as follows:
Wherein, γ is concrete compacting rate, γiFor initial compacting rate, γfReach abundant compaction state for fresh concrete
When compacting rate, for dry concrete, γfFor 99.5%, EtIt is fresh concrete in vibration t time systemic compacting
Can, b, d are test constants, can be by γi、γ1、γ2、E1、E2It is calculated.
Step 4: slump cone being placed in shake table plane, fresh concrete is packed into standard cones by prescriptive procedure and collapses
In degree of falling cylinder, and carefully the upper surface of concrete is equably scraped with trowel or similar means.In order to assess the viscous of sample
Poly- power preferably assesses the education resistance energy of fresh concrete, and the concrete surface sprinkling phenolphthalein solution at the top of slump cylinder will
Its tone is reddish violet.This coloured border circular areas is known as coloured surface.Slump cone is lifted vertically upward, writes down and collapses
Angle value is fallen, starts experimental provision, cone cell fresh concrete is vibrated, time of vibration is to vibrate to abundant compaction state
Time measures slump flow test R1, R2……Rn, the arithmetic mean of instantaneous value of the slump flow test of different ratio mixture is calculated, is denoted as
Rave, when the slump flow test of mixture reaches designated value RaveWhen, absorbing energy is abundant compactioncan；The designated value Rave
Compactioncan based on fresh concrete calculates, and obtains slump of the different ratio mixture when reaching abundant compactioncan by test
Divergence, calculates its average value, quantitatively provides slump extension of the fresh concrete of different ratio when absorbing abundant compactioncan
Degree.
Step 5: by judging that slump flow test reaches RaveWhen, the presence or absence evaluation sample of colored circular contour glues
Poly- power, to assess the anti-isolation characteristic of fresh concrete.The anti-isolation characteristic of assessment fresh concrete includes: the slump of sample
Fresh concrete sample has ruptured, has separated or have elutriation to go out before divergence reaches designated value, then determine concrete resist from
It is insufficient to analyse performance；When the slump flow test of sample reaches designated value, colored circular contour disappears, then determines sample cohesive strength mistake
Low, education resistance can be insufficient；Fresh concrete sample does not rupture before the slump flow test of sample reaches designated value, separation or
Drainage, and circular edge in the colored surface at the top of sample retains, then determine the education resistance of concrete mix compared with
It is good.
It is newly mixed advantageous effects of the invention: calculating in situ quantitation assessment based on compactioncan the invention discloses one kind
The methods experiment device of the anti-isolation characteristic of concrete material has standard slump cone, slump bottom plate, wooden mallet and tape measure, will newly mix
Concrete is packed into slump cone by specification, and phenolphthalein solution is sprayed on slump cylinder top layer fresh concrete surface and forms reddish violet
Round coloured surface rams slump bottom plate using wooden mallet, passes through bottom plate after carrying out slump experiment to fresh concrete sample
Vibration makes concrete mix sample deformations, until slump flow test reaches designated value, observes the state and circle of fresh concrete
The anti-isolation characteristic of the profile variations assessment fresh concrete material of shape coloured surface, the present invention is based on the meters that energy is completed in compacting
It calculates, in the method for the anti-isolation characteristic of in situ quantitation assessment fresh concrete material.
Detailed description of the invention
Fig. 1 is compacting rate and compactioncan curve relation figure；
Fig. 2 is that the anti-isolation characteristic flow diagram of fresh concrete is quantitatively evaluated；
Fig. 3 is that the slump after fresh concrete vibration extends schematic diagram.
Specific embodiment
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated, it should be understood that following specific embodiments are only
For illustrating the present invention rather than limiting the scope of the invention.
Below with reference to example, the present invention will be further explained.
As shown in Figure 1 to Figure 3, a method of the anti-isolation characteristic of fresh concrete material being quantitatively evaluated, its steps is such as
Under:
(1) fresh concrete of three kinds of different ratios is prepared, specific proportion is as shown in the table.
Proportion (the kg/m of table fresh concrete3)
(2) vibration test is carried out to fresh concrete, measures its initial compacting rate γi, and when two different vibrations of selection
Between t1、t2, using following formula, calculate compacting rate γ1、γ2。
The parameter being calculated above is brought into following formula and calculates b, d.
(3) when abundant compaction state is arrived in vibration, i.e. γf=99.5%, it substitutes into above formula and every kind of fresh concrete is calculated
Abundant compactioncan.By abundant compactioncan bring into following formula calculate the vibration of every kind of fresh concrete to completely densified state time:
The result being calculated is as shown in the table.
The test and calculated result of table difference fresh concrete
The slump flow test of three kinds of different fresh concretes is seen the above table, and takes 46 centimetres of its average value to extend for specified collapse
Value.
(4) three kinds of different fresh concretes 1 are packed into standard cones slump cone by the method for specification, and with trowel or
Similar means carefully equably scrape the upper surface of concrete.
(5) in order to clearly assess the cohesive strength of sample, in slump cone sprinkling phenolphthalein solution suitable for reading by its tone
For reddish violet.This coloured moiety is referred to as round coloured surface 2.
(6) slump cone is lifted vertically upward, writes down slump numerical value.
(7) slump bottom plate 3 is rammed with wooden mallet, concrete mix sample deformations is made by back plate vibration, until collapsing
Divergence reaches designated value 46cm.
(8) if having been ruptured before the slump flow test of sample reaches designated value, having separated or there is elutriation to go out, determine
The education resistance of concrete can be insufficient；
If colored circular contour disappears when the slump flow test of sample reaches designated value, then sample cohesive strength is determined
Too low, education resistance can be insufficient；
If do not ruptured before the slump flow test of sample reaches designated value, separation or drainage, and sample top
Circular edge in the colored surface in portion retains, then determines that the education resistance of concrete mix is preferable.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (5)
1. a kind of test method of in situ quantitation assessment concrete material education resistance energy, which comprises the following steps:
Step 1: fresh concrete is packed into slump cone by concrete batching mixture, and the upper surface of concrete is uniform
Ground strikes off；
Step 2: spraying phenolphthalein solution on slump cone fresh concrete surface suitable for reading, form the colored circular contour of reddish violet；
Step 3: preparing the concrete mix of different ratio, initial compacting rate γ is measured by experimental provisioni, mixed using newly mixing
The abundant compactioncan of solidifying soil displacement course curve equation calculation fresh concrete, to calculate its vibration to filling using compactioncan formula
Divide real state for time；Specific calculating process is as follows:
Step 3.1: floor space is that the cylinder of A is fixed on a vibration table, and the fresh concrete of quality m is placed within the barrel,
The height h of cylinder inner concrete is measured, compacting rate at this time is γi, the calculation formula of compacting rate are as follows:
Wherein, γ is concrete compacting rate, H0Height of specimen when compaction state abundant for fresh concrete in cylinder, concrete
Abundant compaction state be the state for being compacted to theoretical density, h is the fresh concrete height of given compacting time；
Step 3.2: starting shake table, time of vibration t1, the height h of record cylinder inner concrete1, calculate compacting rate γ at this time1；After
It is continuous to be vibrated to time t2, the height h of record cylinder inner concrete2, calculate compacting rate γ at this time2, fresh concrete is in t time interior suction
Compactioncan is received to be represented by the following formula:
Wherein, EtIt is fresh concrete in t time systemic compactioncan, unit J/L, t are compacting time, unit s, αmax
For the acceleration of shake table, f is vibration frequency, and ρ is the theoretical density of fresh concrete；Calculate t1、t2When fresh concrete pressure
Real energy E1、E2；
Step 3.3: fresh concrete displacement course curve equation are as follows:
Wherein, γ is concrete compacting rate, γiFor initial compacting rate, γfWhen reaching abundant compaction state for fresh concrete
Compacting rate, for dry concrete, γfFor 99.5%, EtFor fresh concrete vibration t time systemic compactioncan, b,
D is test constant, can be by γi、γ1、γ2、E1、E2It is calculated；
Step 4: starting experimental provision vibrates cone cell fresh concrete, and time of vibration is to vibrate to sufficiently compacting shape
The time of state measures slump flow test R1, R2……Rn, the arithmetic mean of instantaneous value of the slump flow test of different ratio mixture is calculated,
It is denoted as Rave, when the slump flow test of mixture reaches designated value RaveWhen, absorbing energy is abundant compactioncan；
Step 5: by judging that slump flow test reaches RaveWhen, the cohesive strength of the presence or absence evaluation sample of colored circular contour,
To assess the anti-isolation characteristic of fresh concrete.
2. a kind of test method of in situ quantitation assessment concrete material education resistance energy according to claim 1, special
Sign is, designated value R described in step 4aveCompactioncan based on fresh concrete calculates, and obtains different ratio mix by test
Slump flow test of the object when reaching abundant compactioncan, calculates its average value, and the fresh concrete for quantitatively providing different ratio exists
Absorb slump flow test when abundant compactioncan.
3. a kind of test method of in situ quantitation assessment concrete material education resistance energy according to claim 1, special
Sign is, assessed in step 5 fresh concrete anti-isolation characteristic include: sample slump flow test reach designated value before newly mix
Concrete sample has ruptured, has separated or have elutriation to go out, then determines that the education resistance of concrete can be insufficient；The slump of sample is expanded
When the latitude of emulsion reaches designated value, colored circular contour disappears, then determines that sample cohesive strength is too low, and education resistance can be insufficient；Sample
Fresh concrete sample does not rupture before slump flow test reaches designated value, separation or drainage, and at the top of sample
Circular edge on color table face retains, then determines that the education resistance of concrete mix is preferable.
4. a kind of test method of in situ quantitation assessment concrete material education resistance energy according to claim 1, special
Sign is that experimental provision described in step 3 includes shake table, and the shake table includes two with the opposite of particular amplitude vibration
It is eccentrically rotated motor, for recording the computer of data, for adjusting the control panel of shake table frequency and acceleration, circle
Cylinder, standard slump cylinder, slump bottom plate, wooden mallet, tape measure.
5. a kind of test method of in situ quantitation assessment concrete material education resistance energy according to claim 4, special
Sign is that the size of standard slump cylinder is back cut diameter 100mm, lower port diameter 200mm, high 300mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710656480.0A CN107422106B (en) | 2017-08-03 | 2017-08-03 | A kind of method of the anti-isolation characteristic of in situ quantitation assessment fresh concrete material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710656480.0A CN107422106B (en) | 2017-08-03 | 2017-08-03 | A kind of method of the anti-isolation characteristic of in situ quantitation assessment fresh concrete material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107422106A CN107422106A (en) | 2017-12-01 |
| CN107422106B true CN107422106B (en) | 2019-08-06 |
Family
ID=60437325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710656480.0A Active CN107422106B (en) | 2017-08-03 | 2017-08-03 | A kind of method of the anti-isolation characteristic of in situ quantitation assessment fresh concrete material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107422106B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646005A (en) * | 2018-05-04 | 2018-10-12 | 武汉理工大学 | A kind of portable chutable concrete segregability test bar |
| CN111596040B (en) * | 2019-09-02 | 2023-04-28 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Method and device for testing concrete construction performance under vibration effect |
| CN112924653A (en) * | 2021-01-15 | 2021-06-08 | 清华大学 | Non-contact concrete segregation degree intelligent real-time analysis method and device |
| CN112907512A (en) * | 2021-01-15 | 2021-06-04 | 重庆交通大学 | Method and device for detecting working performance of freshly-mixed self-compacting concrete |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10170507A (en) * | 1996-12-09 | 1998-06-26 | Koichi Ono | Method and apparatus for measurement of material segregation of concrete |
| JP2003106973A (en) * | 2001-09-28 | 2003-04-09 | Fujita Corp | Testing method for evaluating segregation resistance of concrete |
| CN102749439A (en) * | 2012-07-03 | 2012-10-24 | 长安大学 | Test and evaluation device for segregation of fresh concrete |
| CN102778556A (en) * | 2011-05-09 | 2012-11-14 | 同济大学 | Testing method for working performance of concrete and apparatus implementing same |
| WO2015160610A1 (en) * | 2014-04-14 | 2015-10-22 | Verifi Llc | Dynamic segregation monitoring of concrete |
| CN105181527A (en) * | 2015-09-21 | 2015-12-23 | 燕山大学 | Slump cone and method for testing working performance of self-compacting concrete |
| CN205175865U (en) * | 2015-05-29 | 2016-04-20 | 南通理工学院 | Concrete mix peaceability apparatus |
| CN205691589U (en) * | 2016-06-23 | 2016-11-16 | 四川建筑职业技术学院 | A kind of detector for detecting self-compacting concrete slump flow test |
| CN206057322U (en) * | 2016-09-05 | 2017-03-29 | 中交第四航务工程局有限公司 | A kind of evaluable live fresh concrete is layered the assay device of situation |
-
2017
- 2017-08-03 CN CN201710656480.0A patent/CN107422106B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10170507A (en) * | 1996-12-09 | 1998-06-26 | Koichi Ono | Method and apparatus for measurement of material segregation of concrete |
| JP2003106973A (en) * | 2001-09-28 | 2003-04-09 | Fujita Corp | Testing method for evaluating segregation resistance of concrete |
| CN102778556A (en) * | 2011-05-09 | 2012-11-14 | 同济大学 | Testing method for working performance of concrete and apparatus implementing same |
| CN102749439A (en) * | 2012-07-03 | 2012-10-24 | 长安大学 | Test and evaluation device for segregation of fresh concrete |
| WO2015160610A1 (en) * | 2014-04-14 | 2015-10-22 | Verifi Llc | Dynamic segregation monitoring of concrete |
| CN205175865U (en) * | 2015-05-29 | 2016-04-20 | 南通理工学院 | Concrete mix peaceability apparatus |
| CN105181527A (en) * | 2015-09-21 | 2015-12-23 | 燕山大学 | Slump cone and method for testing working performance of self-compacting concrete |
| CN205691589U (en) * | 2016-06-23 | 2016-11-16 | 四川建筑职业技术学院 | A kind of detector for detecting self-compacting concrete slump flow test |
| CN206057322U (en) * | 2016-09-05 | 2017-03-29 | 中交第四航务工程局有限公司 | A kind of evaluable live fresh concrete is layered the assay device of situation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107422106A (en) | 2017-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107422106B (en) | A kind of method of the anti-isolation characteristic of in situ quantitation assessment fresh concrete material | |
| CN104865156B (en) | A kind of cement concrete isolation degree evaluation device and its evaluation method | |
| CN106294973B (en) | A kind of mixing proportion design method of celluar concrete | |
| JP5010936B2 (en) | Concrete fluidity evaluation test method and apparatus | |
| CN110412254B (en) | Test method for estimating residual porosity of semi-flexible pavement | |
| CN106738205A (en) | A kind of cement stabilizing crushing gravel mixing proportion design method based on vibration test | |
| CN108867232B (en) | Calculation method for reserved grouting depth of semi-flexible pavement | |
| CN108709979A (en) | A kind of testing equipment and method for evaluating product concrete formability energy | |
| CN107219151A (en) | A kind of test method for determining roadbed soil-stone material maximum dry density | |
| JP5053901B2 (en) | Method for preparing specimen for ground improvement method test | |
| CN109884285A (en) | A kind of test method for Under Concrete isolation degree of vibrating | |
| CN106442035B (en) | Device and method for manufacturing direct shear test sample of concrete-frozen soil contact surface | |
| JP4981984B1 (en) | Properties evaluation method of fresh concrete | |
| CN105675433B (en) | The method for testing low-slump concrete thixotropy effect | |
| JP5248195B2 (en) | Concrete fluidity evaluation test method and apparatus | |
| Muhammad et al. | Difficulties in the sample preparation and testing of modified soils | |
| CN113929410A (en) | Preparation method of self-compacting concrete based on compressible stacking model | |
| JP2021127647A (en) | Selection method of sample preparation method, and sample preparation method | |
| CN109061116B (en) | Material capable of simulating properties of freshly mixed light concrete | |
| Wang et al. | A novel approach to characterize entrained air content in pervious concrete | |
| CN111377691B (en) | Design method for mix proportion of steel slag pervious concrete | |
| JP6514442B2 (en) | Preparation method of spray mortar specimen, formwork for spray mortar specimen, and spray mortar specimen | |
| CN109061117B (en) | Material capable of simulating properties of fresh concrete | |
| CN103234867A (en) | Lightweight aggregate concrete pumpability testing method | |
| CN110376090B (en) | Detection and analysis method for machine-made sand |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |