CN105388088A - Test apparatus for characterizing condensation characteristic of foam fluid by loss flow time, and method thereof - Google Patents
Test apparatus for characterizing condensation characteristic of foam fluid by loss flow time, and method thereof Download PDFInfo
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- CN105388088A CN105388088A CN201510920342.XA CN201510920342A CN105388088A CN 105388088 A CN105388088 A CN 105388088A CN 201510920342 A CN201510920342 A CN 201510920342A CN 105388088 A CN105388088 A CN 105388088A
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- measuring vessel
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- aerated fluid
- base plate
- cement based
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- 239000012530 fluid Substances 0.000 title claims abstract description 60
- 239000006260 foam Substances 0.000 title claims abstract description 22
- 238000012360 testing method Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title abstract description 13
- 238000009833 condensation Methods 0.000 title abstract description 6
- 230000005494 condensation Effects 0.000 title abstract description 6
- 230000008901 benefit Effects 0.000 claims abstract description 6
- 238000010998 test method Methods 0.000 claims abstract description 4
- 239000004568 cement Substances 0.000 claims description 27
- 238000009434 installation Methods 0.000 claims description 11
- 238000012512 characterization method Methods 0.000 claims description 10
- 230000005484 gravity Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000003556 assay Methods 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- 239000011381 foam concrete Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 210000000497 foam cell Anatomy 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013005 condensation curing Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
-
- 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
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a test apparatus for characterizing the condensation characteristic of a foam fluid by a loss flow time, and a method thereof. The apparatus comprises a test rack and a measurement container; the test rack comprises a baseboard, the baseboard is vertically fixedly provided with two supporting plates, two support plates are vertical to each other and are fixedly arranged on the baseboard through the two supporting plates, and four corners of the baseboard are respectively provided with a leveling screw and a leveling nut; and the measurement container is a cuboid, the upper end of the measurement container is opened, the middle portion of the wall of the measurement container is engraved with an initial line, and a connecting line from the bottom end of one vertical edge of one side surface of the measurement container to the upper portion of another vertical edge is adopted as a horizontal line. The invention also provides a method using the apparatus to test the loss flow time of a foam fluid to be tested, and steps thereof. The condensation time of the tested foam fluid, which is the loss flow time, can be obtained by adopting the apparatus and the method. The test apparatus has the advantages of simple structure and ingenious conception, and the test method has the advantages of simple operation and result accuracy.
Description
Technical field
The invention belongs to a kind of aerated fluid congealing property proving installation and method, be specifically related to a kind of with the proving installation losing flowing time characterization of foam fluid condenses characteristic and method.
Background technology
Aerated fluid has good fracture seepage and the feature of upwards piling up and after condensation cure, has superior heat-insulating capability, therefore it has become the technical way of following mine and coalfield control coal spontaneous combustion.Because the seepage flow spreading morphology of cement based aerated fluid and scope depend on its condensation feature to a great extent, and groundwater increment, defining of scope of perfusion also depend on its setting time, so the condensation feature of cement based aerated fluid is the factor needing most consideration in cast-in-place construction.But for cement based aerated fluid, the research of the assay method of its setting time is considerably less.The impact of foaming agent consumption on setting time as what mainly stress in the experimental study of setting time " foam concrete " that domestic scholars Fan Lilong proposes, assay method and the penetration resistance method of what the mensuration of setting time adopted is concrete coagulating time, this with provide in cement standard GB/T/T1346-2011 utilize the initial set pin of Vicat apparatus and final set pin to measure the method for cement setting time is the same is not suitable for the heterogeneous aerated fluid of porous, reason is when in testing needle injection aerated fluid material, it can by the foaming space and hole wall liquid film, and in the foaming space, be air, substantially be zero cause determination data to have error to the resistance of penetration needle.And in the industry standard JG/T266-2011 of foam concrete, provide only the denseness standard of foam concrete, do not provide the standard measured setting time.Therefore the assay method proposing a kind of aerated fluid accurately and effectively setting time is extremely necessary.
Summary of the invention
First object of the present invention is to provide a kind of with the proving installation losing flowing time characterization of foam fluid condenses characteristic.For solving the problem, by analyzing the microscopic mechanism of cement based aerated fluid, draw in condensation process for its hydration reaction of single foams promote foam cell walls condense rapidly, cell stability strengthens, structure is not yielding, single foams resistance to flow is finally caused to strengthen, flow difficulties.Increase hydrated product in generally speaking foam cell walls, and overallly to separate out, mutual bridge joint between variable grain, single foam beads joins together, and overall flow hinders mutually, finally slowly loses flowability, and reaches coagulated state.We are undertaken testing by apparatus of the present invention and propose to lose flowing time (Lossfluiditytime for this reason, LFT) index, as characterizing the congealing property of inorganic solidified aerated fluid, LFT represents when aerated fluid reaches time no longer needed for flow state.
First object of the present invention realizes by the following technical solutions: should with the proving installation losing flowing time characterization of foam fluid condenses characteristic, and it comprises testing jig and measuring vessel; Described testing jig comprises base plate, and base plate is vertically fixed with two pieces of back up pads, and two pieces of supporting plates are mutually an angle of 90 degrees and are fixed on base plate by described two pieces of back up pads, and four angles of base plate are respectively equipped with a leveling serew and a leveling nut; Described measuring vessel is rectangular parallelepiped, its upper end open, has an initial line in the wall center score of measuring vessel, using the line on a vertical edge bottom to another vertical edge top of measuring vessel one side as to horizontal line; When measuring vessel is positioned in an angle of 90 degrees that two pieces of supporting plates are formed, the aerated fluid to be measured being positioned at initial line place volume during measuring vessel horizontal positioned slowly flows under gravity, and when finally flowing to level, aerated fluid top levels just in time rests on to horizontal line place.
Concrete, the base plate of described testing jig, back up pad, supporting plate and measuring vessel all adopt pmma material to make.
Concrete, described two pieces of supporting plates become 60 degree and 30 degree of angles to be fixed on base plate by back up pad respectively with base plate; The length of described measuring vessel is respectively 10cm, 10cm, 23cm, and initial line is positioned at the At The Height apart from measuring vessel bottom surface 10cm, is positioned on the diagonal line of measuring vessel one side to horizontal line.
Second object of the present invention is to provide based on above-mentioned with the method for testing of the proving installation losing flowing time characterization of foam fluid condenses characteristic, and the method comprises the step of following order:
(1) leveling serew adjusted on base plate four angles makes device be in level, then the cement based aerated fluid of certain porosity is injected measuring vessel, makes aerated fluid volume reach initial line place;
(2) timing, at a time T from aerated fluid preparation terminates
iafter by measuring vessel slant setting in an angle of 90 degrees that supporting plate is formed, start timing simultaneously; The cement based foam stream that prepared in measuring vessel is known from experience to take advantage of a situation because of gravity and is flowed downward, finally present level or close to level and make the top levels of cement based aerated fluid spread to measuring vessel to horizontal line place; Stop timing when cement based aerated fluid flow to during horizontal line place, now timing is t
i, and be referred to as between at ordinary times, near flat after measuring vessel lift down from supporting plate and just put, cement based aerated fluid is restPosed;
(3) in same time interval T
i+1in the moment, again measuring vessel is put in timing on supporting plate, operates before repetition, will be obtained another to t between at ordinary times
i+1; Because cement based aerated fluid condenses gradually along with the carrying out of time can react, to increase to the flat required time at every turn; Obtaining many groups of (t, T) after, draw the t-T curve under this porosity, and matching is carried out to curve, show after matching that curve has bar asymptotic line, because of under same time interval, t increases in time and will infinitely increase, be tending towards infinite, we can think that the time to horizontal line of arriving is that cement based aerated fluid condenses time infinitely great, therefore the moment T that asymptotic line is corresponding
lFbe the time lost flowability of cement based aerated fluid, be called for short LFT.
Proving installation structure of the present invention is simple, be skillfully constructed, and method of testing is easy and simple to handle, result is accurate, its innovative point and beneficial effect be mainly reflected in following some:
(1) use by get same time interval repeatedly tilt container time aerated fluid arrived at every turn to horizontal line carry out Function Fitting after time corresponding to the asymptotic line that obtains as setting time of aerated fluid, and will be called setting time and lose flowing time (LFT), the result accuracy of test is higher like this.
(2) the transparent organic glass being convenient to observe and operate is used to be experimental provision, science convenient compared with other method of testings.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention device.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is experiment flow schematic diagram of the present invention.
Fig. 4 is Function Fitting figure of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
See Fig. 1, Fig. 2, the device of the present embodiment comprises testing jig 1 and measuring vessel 2.Testing jig 1 comprises base plate 103, base plate 103 is vertically fixed with two pieces of back up pads 102, two pieces of supporting plates 101 are mutually an angle of 90 degrees and are fixed on base plate 103 by described two pieces of back up pads 102, left and right two pieces of supporting plates 101 become 60 degree and 30 degree of angles respectively with base plate, make the foam stream physical efficiency to be measured in the measuring vessel 2 that aerated fluid to be measured is housed be placed on it flow in the present embodiment to horizontal line 203.Four angles of base plate 103 are respectively equipped with a leveling serew 105 and leveling nut 104, four exchange flush nut 104 and leveling serew 105 and cooperatively interact and make whole device be in level.The base plate 103 of above-mentioned testing jig 1, back up pad 102, supporting plate 101 all adopt pmma material to make.Measuring vessel 2 is rectangular parallelepipeds that a length is respectively 10cm, 10cm, 23cm, its upper end open, and measuring vessel 2 also adopts pmma material to make.On the wall of the 10cm At The Height of the bottom surface 201 apart from measuring vessel 2, delineation has an initial line 202, and its effect is the volume limiting aerated fluid to be measured.Using the diagonal line of measuring vessel 2 one side as to horizontal line 203, whether its effect detects aerated fluid mobility lose and record aerated fluid flowing time.When measuring vessel 2 is positioned in an angle of 90 degrees that two pieces of supporting plates 101 are formed, the aerated fluid to be measured being positioned at initial line 202 place volume during measuring vessel 2 horizontal positioned slowly flows under gravity, and when finally flowing to level, aerated fluid top levels just in time rests on to horizontal line 203 place.
See Fig. 3, Fig. 4, based on above-mentioned with the measuring method of the measurement mechanism losing flowing time characterization of foam fluid condenses characteristic, completed mensuration aerated fluid to be tested being lost to flowing time by following step:
Step 1: adjustment leveling serew 105 makes device be in level, then is 400g/cm by density
3cement based aerated fluid be injected in rectangular parallelepiped measuring vessel 2, make slurry volume arrive initial line 202 place.
Step 2: timing from preparation terminates, is placed in testing jig 1 on surface level after the 2 minutes, then measuring vessel 2 slant setting on support 101, becomes 30 degree of angles, start timing simultaneously with level; The cement based foam stream that prepared in measuring vessel 2 is known from experience to take advantage of a situation because of gravity and is flowed downward, as in Fig. 3 1. → 2. → 3. → 4. → 5. → 6. shown in, finally present level or spread to horizontal line 203 place close to level.Stop timing when cement based aerated fluid flow to during horizontal line 203 place, now timing is 2 minutes, is first " between at ordinary times ".Near flat after measuring vessel 2 lift down from support 101 and just put, cement based aerated fluid is restPosed.
Step 3: at same time interval after 2 minutes, is again put in timing on support 101 by measuring vessel 2, operates before repetition, will obtain second " between at ordinary times ", 2.25 minutes.Then, repeat above operation always, obtain many groups (t, T).The t-T curve under this porosity is drawn by Matlab, and matching is carried out to curve, show after matching that curvilinear equation is t=19.2/ (14-T)+0.48, can find that this equation has bar asymptotic line T=14, because of under same time interval, t increases in time and will infinitely increase, and is tending towards infinite, we can think that the time infinite greatly inorganic solidified foam arrived to horizontal line condenses, therefore the moment T that asymptotic line is corresponding
lF=14 times lost flowability being cement based aerated fluid under this porosity, be called for short LFT.
More than show and describe the advantage of the ultimate principle of invention, principal character and invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (4)
1., to lose a proving installation for flowing time characterization of foam fluid condenses characteristic, it is characterized in that: it comprises testing jig and measuring vessel; Described testing jig comprises base plate, and base plate is vertically fixed with two pieces of back up pads, and two pieces of supporting plates are mutually an angle of 90 degrees and are fixed on base plate by described two pieces of back up pads, and four angles of base plate are respectively equipped with a leveling serew and a leveling nut; Described measuring vessel is rectangular parallelepiped, its upper end open, has an initial line in the wall center score of measuring vessel, using the line on a vertical edge bottom to another vertical edge top of measuring vessel one side as to horizontal line; When measuring vessel is positioned in an angle of 90 degrees that two pieces of supporting plates are formed, the aerated fluid to be measured being positioned at initial line place volume during measuring vessel horizontal positioned slowly flows under gravity, and when finally flowing to level, aerated fluid top levels just in time rests on to horizontal line place.
2. according to claim 1 with the proving installation losing flowing time characterization of foam fluid condenses characteristic, it is characterized in that: the base plate of described testing jig, back up pad, supporting plate and measuring vessel all adopt pmma material to make.
3. according to claim 1 with the proving installation losing flowing time characterization of foam fluid condenses characteristic, it is characterized in that: described two pieces of supporting plates become 60 degree and 30 degree of angles to be fixed on base plate by back up pad respectively with base plate; The length of described measuring vessel is respectively 10cm, 10cm, 23cm, and initial line is positioned at the At The Height apart from measuring vessel bottom surface 10cm, is positioned on the diagonal line of measuring vessel one side to horizontal line.
4. based on described in claim 1 to lose a method of testing for the proving installation of flowing time characterization of foam fluid condenses characteristic, it is characterized in that comprising the step of following order:
(1) leveling serew adjusted on base plate four angles makes device be in level, then the cement based aerated fluid of certain porosity is injected measuring vessel, makes aerated fluid volume reach initial line place;
(2) timing, at a time T from aerated fluid preparation terminates
iafter by measuring vessel slant setting in an angle of 90 degrees that supporting plate is formed, start timing simultaneously; The cement based foam stream that prepared in measuring vessel is known from experience to take advantage of a situation because of gravity and is flowed downward, finally present level or close to level and make the top levels of cement based aerated fluid spread to measuring vessel to horizontal line place; Stop timing when cement based aerated fluid flow to during horizontal line place, now timing is t
i, and be referred to as between at ordinary times, near flat after measuring vessel lift down from supporting plate and just put, cement based aerated fluid is restPosed;
(3) in same time interval T
i+1in the moment, again measuring vessel is put in timing on supporting plate, operates before repetition, will be obtained another to t between at ordinary times
i+1; Because cement based aerated fluid condenses gradually along with the carrying out of time can react, to increase to the flat required time at every turn; Obtaining many groups of (t, T) after, draw the t-T curve under this porosity, and matching is carried out to curve, show after matching that curve has bar asymptotic line, because of under same time interval, t increases in time and will infinitely increase, be tending towards infinite, we can think that the time to horizontal line of arriving is that cement based aerated fluid condenses time infinitely great, therefore the moment T that asymptotic line is corresponding
lFbe the time lost flowability of cement based aerated fluid, be called for short LFT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510920342.XA CN105388088B (en) | 2015-12-11 | 2015-12-11 | To lose the test device and method that flowing time characterizes aerated fluid congealing property |
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| CN201510920342.XA CN105388088B (en) | 2015-12-11 | 2015-12-11 | To lose the test device and method that flowing time characterizes aerated fluid congealing property |
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| CN105388088A true CN105388088A (en) | 2016-03-09 |
| CN105388088B CN105388088B (en) | 2017-09-15 |
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| CN108645754A (en) * | 2018-05-23 | 2018-10-12 | 南京航空航天大学 | A kind of test device and method in foam concrete presetting period |
| CN110031363A (en) * | 2019-04-22 | 2019-07-19 | 长安大学 | A kind of ground polymers starches material initial set, final setting time test device and test method |
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| CN110031363A (en) * | 2019-04-22 | 2019-07-19 | 长安大学 | A kind of ground polymers starches material initial set, final setting time test device and test method |
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| CN105388088B (en) | 2017-09-15 |
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