One kind newly mixes cement-based material testing permeability device
Technical field
The present invention relates to one kind newly to mix cement-based material testing permeability device, belongs to construction material technical field of measurement and test.
Background technology
Permeability is to determine the key factor of concrete durability, at present the research side on concrete permeability both at home and abroad
Method has water to ooze method(Mortar Anti-leakage instrument, concrete impervious instrument), gas osmosis(Concrete gas Anti-leakage instrument)And ion infiltration
Method(Electric flux tester, chloride diffusion coefficient tester)Deng, but be using hardened mortar or concrete as test object, it surveys
The examination cycle is generally 28 days or 56 days, and there are test period length, result hysteresis and result of the test and entity knots in practical applications
Structure concrete really permeates the problem of sexual deviation is big.So when obtaining 28d or 56d concrete permeability indexs, concrete is applied
Work has been completed more, even if test result shows that concrete permeability is bad, can not also concrete of having constructed be adjusted.Cause
This, how to fresh concrete(The concrete that water has just been added to be obtained after stirring evenly)Permeability tested and characterized,
It then can preferably solve foregoing problems.
At present, it is seldom to fresh cement concrete material permeability research data, it is primarily due to lack effective test
Method.For fresh cement concrete material, since internal rigid skeleton is not formed completely, also without stable network knot
Structure, the more difficult accurate measurement of permeability.Patent " a kind of concrete permeability testing device and its test system
(CN201710453080.X)", " constant pressure concrete permeability testing device(CN201310330466.3)", " concrete permeate
System safety testing device(CN201020257433.2)" etc. be test maturing permeability, fresh concrete can not be tested
Permeability.Existing electrochemical workstation and the contactless electrode test instrument of Hong Kong University of Science and Thchnology professor Li Zongjin exploitation etc.
Device then can only indirectly testing fresh cement concrete material electrology characteristic parameter, and cannot directly test its permeability.
The content of the invention
The object of the present invention is to provide one kind directly to be tested newly mixing cement-base concrete material slurry permeability
Device.
The present invention proposes that one kind newly mixes cement-based material testing permeability device by water storage box(1), constant pressure sink(2), on
Cover board(3), sealing ring(4), standing screw(5), bottom plate(6), cylinder body(7), sealing ring(8), sump(9), filter paper(10), it is permeable
Plate(11), feed bin(12), filter paper(13), porous disc(14), tapping pipe(15), valve(16), valve(17), valve(18), valve
Door(19), connecting tube(20), water inlet pipe(21), outlet pipe(22), beaker(23)And electronic balance(24)Composition, water storage box(1)
Positioned at constant pressure sink(2)Top, constant pressure sink(2)Positioned at cylinder body(7)Surface, cylinder body(7)Inside is by filter paper(10)With
Porous disc(11)It is separated into top sump(9)With lower step feed bin(12)Two parts, outlet pipe(22)With bottom plate(6)Connector
Positioned at bottom plate(6)On the inner wall of central slot, beaker(23)Positioned at outlet pipe(22)Lower section.
One kind newly mixes cement-based material testing permeability device, constant pressure sink(2)Positioned at cylinder body(7)Surface, pass through
Connecting tube(20)With cylinder body(7)In sump(9)It is connected, constant pressure sink(2)Pass through tapping pipe(15)It keeps constant hydraulic pressure, surveys
Valve during examination(16), valve(17), valve(18)And valve(19)It is always maintained at opening state.
One kind newly mixes cement-based material testing permeability device, cylinder body(7)For interior diameter 102mm, the stainless steel of wall thickness 5mm
Steel pipe, height 120mm, inside is by filter paper(10)And porous disc(11)It is divided into top sump(9)With lower part feed bin(12)
Two parts, sump(9)Highly control is in 30mm ~ 40mm, feed bin(12)Highly control is in 60mm ~ 70mm.
One kind newly mixes cement-based material testing permeability device, porous disc(11)With(14)For thickness 3mm, diameter 101mm
Stainless-steel sheet, surface is evenly distributed with the upper lower through-hole of spacing 1mm, diameter 3mm;Filter paper(10)And filter paper(13)For once
Property using experiment filter paper.
One kind newly mixes cement-based material testing permeability device, upper cover plate(3), sealing ring(4), bottom plate(6), cylinder body(7)
And sealing ring(8)Pass through standing screw(5)Integral, upper cover plate is combined in connection(3)For diameter 160mm, the stainless steel of thickness 5mm
Plectane, away from upper cover plate(3)The through hole there are two symmetrical diameter 8mm is set at the 70mm of center, in order to standing screw(5)It wears
It crosses, upper cover plate(3)Bottom surface is equipped with internal diameter 102mm, width 5mm, the annular groove of depth 2mm, with fixing seal ring(4);Bottom plate
(6)For diameter 160mm, the stainless steel plate of thickness 12mm, away from bottom plate(6)Symmetrical diameter there are two being set at the 70mm of center
The through hole of 8mm, bottom plate(6)Upper surface is additionally provided with outer diameter 100mm, the groove of depth 5mm;Sealing ring(4)With(8)For rubber material
Material, sealing ring internal diameter are 102mm, and sealing ring cross section diameter is 5mm;Standing screw(5)For the screw rod with nut of diameter 6mm,
Material is stainless steel.
Test device proposed by the present invention ensure that the constant of hydraulic pressure in test process by constant pressure sink, by using filter
Paper is combined with porous disc to be solved in test process instead of the mode of permeable stone since gelling material particles easily enter permeable stone
In the problem of pore plugging is caused to change test result poor repeatability caused by its infiltration coefficient.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
In the Figure of description of the present invention:1 is water storage box, and 2 be constant pressure sink, and 3 be upper cover plate, and 4 be sealing ring, and 5 are
Standing screw, 6 be bottom plate, and 7 be cylinder body, and 8 be sealing ring, and 9 be sump, and 10 be filter paper, and 11 be porous disc, and 12 be feed bin, and 13 are
Filter paper, 14 be porous disc, and 15 be tapping pipe, and 16 be valve, and 17 be valve, and 18 be valve, and 19 be valve, and 20 be connecting tube, 21
It is outlet pipe for water inlet pipe, 22,23 be beaker, and 24 be electronic balance.
Specific embodiment
Below in conjunction with the accompanying drawings, the application method of test device of the present invention is illustrated.
First by standing screw(5)Through bottom plate(6), then by porous disc(14)It is placed on bottom plate(6)It, will at central slot
Filter paper(13)It is placed in porous disc(14)On, then sealing ring(8)It is sleeved on porous disc(14)Outside, by cylinder body(7)It is pressed on sealing
Ring(8)Above.Then cement-based material is prepared in experiment ratio, weighs 1200g samples and be packed into cylinder body(7)In, it then will be permeable
Plate(11)It puts down gently on sample top, is then covered with filter paper(10), then will have been inserted into sealing ring(4)Upper cover plate(3)Through fixation
Screw rod(5)Push down cylinder body(7), be then locked screw rod(5), finally cylinder body is touched with rubber hammer(7)Under surrounding number.Then will
Constant pressure sink(2)Fixation is placed on upper cover plate(3)Connecting tube is used in top(20)By constant pressure sink(2)And upper cover plate(3)It is connected,
Then valve is first opened(17), valve(18)And valve(19), then will fill the water storage box of water(1)It is placed on higher than constant pressure water
Slot(2)Top, open valve(16), pass water through water inlet pipe(21)Flow into constant pressure sink(2), until water is from outlet pipe(22)
Outflow, and bubble-free is from water pipe(22)During middle discharge, start timing, and by beaker(23)It is placed on electronic balance(24)On, juxtaposition
In outlet pipe(22)Under, the water of discharge is collected, and by the water of design time interval record discharge, is terminated until testing.