CN205941552U - Concrete aggregate alkali activity verification model - Google Patents
Concrete aggregate alkali activity verification model Download PDFInfo
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- CN205941552U CN205941552U CN201620851006.4U CN201620851006U CN205941552U CN 205941552 U CN205941552 U CN 205941552U CN 201620851006 U CN201620851006 U CN 201620851006U CN 205941552 U CN205941552 U CN 205941552U
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- volumetric flask
- tube
- concrete
- concrete aggregate
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- 230000000694 effects Effects 0.000 title claims abstract description 24
- 239000003513 alkali Substances 0.000 title claims abstract description 21
- 238000012795 verification Methods 0.000 title abstract description 6
- 239000007788 liquid Substances 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 8
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 22
- 239000004570 mortar (masonry) Substances 0.000 description 10
- 238000012423 maintenance Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000004568 cement Substances 0.000 description 4
- 239000004576 sand Substances 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000012615 aggregate Substances 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Landscapes
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The utility model belongs to the technical field of concrete aggregate activity verification technique and specifically relates to a concrete aggregate alkali activity verification model, through establishing and handling concrete aggregate alkali activity verification model, make the whole volume change that the concrete takes place the inflation change obtain fast, directly perceived, obvious reading out, reduce the deviation that the manual operation detected numerical value and leads to, reduce the error production rate, improve the accuracy, reduce the detection degree of difficulty, realize verifying that the result is from qualitative to quantitative conversion, effectively improve the accuracy to concrete aggregate alkali activity verification.
Description
Technical field
This utility model is related to aggregate activity verification technique field, and especially a kind of Alkali-activity of Concrete Aggregate is tested
Model of a syndrome.
Background technology
In prior art, the method judging concrete gravel aggregate basic active is had a lot, but main application is sand
The excellent express method of slurry.
" accelerated motar-bar test " is documented in《Concrete for hydraulic structure sandstone aggregate testing regulationss DL/T5151-2014》5.4 section
In, it is used to check the basic active of concrete gravel aggregate, can detect that aggregate is potentially harmful in mortar in 16d
Alkali_silica reaction, be particularly suited for the aggregate checked reaction slow or only just produce expansion in the later stage；Gas cardinal principle
It is that mortar specimen, and maintenance at higher temperature (80 DEG C) are made with aggregate and high-alkali cement, promote generation alkali-aggregate anti-
Should, and the length change of periodic measurement cement mortar specimen, to identify caused by the reaction between the alkali in cement and active aggregates
Expansion whether there is potential hazard.
The concrete operations of " accelerated motar-bar test " are：Cement and level are joined satisfactory aggregate sample mixing and becomes a constant current
The mortar of dynamic degree.The cement-sand ratio of mortar is 1：2.25.Test specimen is the prism of 25.4mm × 25.4mm × 285mm.Specimen molding
After finishing, temperature put into together by gang mould is maintenance 20h ± 2h in 20 DEG C ± 3 DEG C, the fog room of humidity more than 95% or curing box
Afterwards, the demoulding, measures the initial reading of test specimen immediately, after being measured, test specimen is fully immersed in equipped with tap water in thermostatic chamber
The maintenance bucket of sealing in, rest casing and put into temperature and be maintained at constant temperature 24h in 80 DEG C ± 2 DEG C of constant water bath box, by maintenance
Cylinder takes out from constant water bath box, opens cover, test specimen is taken out, dried surface and two ends gauge head with towel, measure as early as possible
The datum length of test specimen, test specimen is fetched into measurement from solution and finishes and should complete in the time of 15s ± 5s.One group of test specimen has measured
Afterwards, load in the maintenance cylinder of NaOH solution filling 1mol/L immediately, test specimen should be completely soaked in the solution, covers maintenance cover
Son, is allowed to seal, then rests in the water bath with thermostatic control that casing puts into 80 DEG C ± 2 DEG C of temperature.Carry out three sights after measuring basiss length
Survey, i.e. 3d, 7d, 14d, observation age standard to 1h.The measuring method of test specimen is identical with surveying datum length.
The expansion rate of test specimen is calculated as follows：
In formula：εtTest specimen is in the expansion rate of t days ages, %；
LtTest specimen is in the length of t days ages, mm；
LoThe datum length of test specimen, mm；
The length of Δ gauge head (burying nail), mm.
One group of above-mentioned test specimen is three, and the meansigma methodss of three test specimen mensure are the expansion rate value of a certain age.
" accelerated motar-bar test " evaluate aggregate basic active standard be：
(1) when the expansion rate of mortar specimen 14d is less than 0.1%, then aggregate is inert aggregate；
(2) when the expansion rate of mortar specimen 14d is more than 0.2%, then aggregate is the active bone with potential hazard reaction
Material；
(3) when the expansion rate of mortar specimen 14d is between 0.1% to 0.2%, should be in conjunction with onsite application to this aggregate
Record, lithofacies analysis, the time of test specimen observation are extended down to the test result after 28d, or concrete prism test result of the test etc. is entered
Row Comprehensive Assessment.
Even so, " accelerated motar-bar test " of the prior art is only in the length increasing to carry out checking
Reason so that the result more unilateral it is difficult to meet the checking of Alkali-activity of Concrete Aggregate comprehensively, simultaneously need to repeatedly being surveyed
After amount, then calculated so that the error being detected increases, so inaccurate to the result of aggregate basic active；Topmost
Reason is to be difficult to intuitively draw situation of change, needs artificial continuous test, and then chooses average so that the mistake of conclusion
Difference is larger.
Utility model content
In order to solve above-mentioned technical problem present in prior art, this utility model provides a kind of aggregate alkali to live
Property checking model.
It is achieved particular by technical scheme below：
A kind of Alkali-activity of Concrete Aggregate verifies model, including volumetric flask, rubber stopper, U-tube, indicator solution, wherein rubber
Plug is arranged on the bottleneck of volumetric flask, and one end of U-tube enters in volumetric flask through rubber, arranges on the U-shaped portion position of U-tube
There is indicator solution, equipped with concrete in volumetric flask.
The U-shaped portion position of described U-tube is divided on outer end and the inner, wherein outer end and/or the inner and is provided with scale, unit
For mm.
Described scale, when it is arranged on outer end, is when the inner is equal with the plane of outer end, upper to instruction fluid level
Face is arranged, and is counted for 0 with the plane of indicator solution, is increased up；When it is arranged on the inner, it is equal with the plane of outer end in the inner
When, to being provided below of instruction fluid level, counted for 0 with the plane of indicator solution, increase downwards.
Described indicator solution is the colored liquid that can form obvious color contrast with U-tube.
Described colored liquid is yellow liquid.
Described model be changed by the volume factor being arranged in volumetric flask so that gas in volumetric flask to
Move in U-tube, and then promote the indicator solution flowing of U-tube U-shaped portion position so that on U-shaped portion position, by inner and/or outer
The scale of end change, intuitively reads out the change in volume situation in volumetric flask, and then draws volume of concrete expansion status, realizes
Judgement to aggregate activity.
The diameter of the U-tube that the invention adopts is preferably less than or is equal to the glass tubing of 0.5mm, by this diameter
Define so that the micro volume change in volumetric flask can be embodied so that more by the height change of macroscopical indicator solution
Plus directly perceived, reading error is less.
Compared with prior art, technique effect of the present utility model is embodied in：
By being set up to Alkali-activity of Concrete Aggregate checking model and being processed so that concrete expands change
Overall volume change obtain quick, directly perceived, significantly read out, reduce manual operation and detect the deviation that leads to of numerical value, reduce
Error generation rate, improves accuracy, reduces detection difficulty, realizes the conversion from qualitative to quantitative for the result, it is right to effectively improve
The accuracy of Alkali-activity of Concrete Aggregate checking.
Brief description
Fig. 1 verifies model structure schematic diagram for Alkali-activity of Concrete Aggregate.
1-U type pipe 2- indicator solution 3- volumetric flask 4- rubber stopper 2-1- outer end 2-2- is inner.
Specific embodiment
Come with specific embodiment below in conjunction with the accompanying drawings the technical solution of the utility model is further limited, but
Claimed scope is not only limited to description.
Embodiment
As shown in figure 1, a kind of Alkali-activity of Concrete Aggregate verifies model, including volumetric flask 3, rubber stopper 4, U-tube 1, refer to
Show liquid 2, wherein rubber stopper 4 is arranged on the bottleneck of volumetric flask 3, and one end of U-tube 1 passes through rubber stopper 4 to enter in volumetric flask 3, in U
It is provided with indicator solution 2, equipped with concrete in volumetric flask 3 on the U-shaped portion position of type pipe 1.
In certain embodiments, the U-shaped portion position of described U-tube 1 is divided into outer end 2-1 and inner 2-2, wherein outer end 2-1
And/or it is provided with scale on the 2-2 of the inner, unit is mm.
In certain embodiments, described scale, when it is arranged on outer end 2-1, is flat in inner 2-2 and outer end 2-1
When face is equal, arranges to above instruction fluid level, counted for 0 with the plane of indicator solution, be increased up；It is arranged on inner 2-2
When, it is when inner 2-2 is equal with the plane of outer end 2-1, to being provided below of instruction fluid level, with the plane of indicator solution for 0
Meter, increases downwards.
In certain embodiments, described indicator solution 2 is the coloured liquid that can form obvious color contrast with U-tube 1
Body.
In certain embodiments, described colored liquid is yellow liquid.
In certain embodiments.Described model be changed by the volume factor being arranged in volumetric flask 3 so that
Gas in volumetric flask 3 moves in U-tube 1, and then promotes the indicator solution 2 at U-tube 1U type position to flow so that in U-shaped portion
On position, by the scale of inner 2-2 and/or outer end 2-1 change, intuitively read out the change in volume situation in volumetric flask 3, and then
Draw volume of concrete expansion status, realize the judgement to aggregate activity.
In certain embodiments, the diameter of above-mentioned U-tube is less than or equal to 0.5mm, and then it is small to realize volumetric flask
Change, all can embody so that reading more directly perceived, error is less, reduces work on the scale of U-tube U-shaped portion position
Property checking error rate, improve the reliability of result.
The method specifically to be verified using this model is：The aggregate being used for concrete batching is ground to form carefully using skin grinder
Sand, and aggregate, cement, water are loaded in volumetric flask, stirred so that there is hydration reaction with little tamper, then stood
Place 1d, and after guaranteeing that mortar hydration reaction is complete, mortar is in drying regime, that is, be exactly to extrude non-water flow to expose, then to
The sodium hydroxide solution that molar concentration is 1mol/L is loaded, addition is to flood mortar, then covers using rubber stopper in volumetric flask
The mouth of volumetric flask, then one end of U-tube is stretched in volumetric flask through rubber stopper, make checking model；
Checking model is placed in 78-82 DEG C of water bath, maintenance 14d, observes the change in elevation of indicator solution, and remember
Record as N；
As N≤0.001h, aggregate is inert aggregate；
As N >=0.002h, aggregate is the active aggregates of potentially dangerous property reaction；
When N is between 0.001h-0.002h, then test specimen is continued to extend one times of curing cycle, repeat and define N value
Size：If N value is higher than 0.002h, it is the active aggregates of potentially dangerous property reaction, otherwise is inert aggregate.
Claims (6)
1. a kind of Alkali-activity of Concrete Aggregate checking model is it is characterised in that include volumetric flask (3), rubber stopper (4), U-tube
(1), indicator solution (2), wherein rubber stopper (4) are arranged on the bottleneck of volumetric flask (3), and one end of U-tube (1) passes through rubber stopper (4)
Enter in volumetric flask (3), indicator solution (2) is provided with the U-shaped portion position of U-tube (1), equipped with concrete in volumetric flask (3).
2. Alkali-activity of Concrete Aggregate as claimed in claim 1 verifies model it is characterised in that the U of described U-tube (1)
Type position is divided into and is provided with scale on outer end (2-1) and inner (2-2), wherein outer end (2-1) and/or inner (2-2), and unit is
mm.
3. Alkali-activity of Concrete Aggregate as claimed in claim 2 verifies model it is characterised in that described scale, its setting
When outer end (2-1), it is when inner (2-2) is equal with the plane of outer end (2-1), arrange to above instruction fluid level, with
The plane of indicator solution is 0 meter, is increased up；When it is arranged on inner (2-2), it is the plane at inner (2-2) and outer end (2-1)
When equal, to being provided below of instruction fluid level, counted for 0 with the plane of indicator solution, increase downwards.
4. Alkali-activity of Concrete Aggregate checking model as claimed in claim 1 is it is characterised in that described indicator solution (2) is
The colored liquid of obvious color contrast can be formed with U-tube (1).
5. Alkali-activity of Concrete Aggregate as claimed in claim 4 verifies model it is characterised in that described colored liquid is Huang
Color liquid.
6. Alkali-activity of Concrete Aggregate as described in any one of claim 1-5 verifies model it is characterised in that described model
It is to be changed by the volume factor being arranged in volumetric flask (3) so that the gas in volumetric flask (3) moves in U-tube (1)
Dynamic, and then promote indicator solution (2) flowing of U-tube (1) U-shaped portion position so that on U-shaped portion position, by inner (2-2) and/or
The scale that outer end (2-1) changes, intuitively reads out the change in volume situation in volumetric flask (3), and then show that volume of concrete is swollen
Swollen situation, realizes the judgement to aggregate activity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620851006.4U CN205941552U (en) | 2016-08-08 | 2016-08-08 | Concrete aggregate alkali activity verification model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620851006.4U CN205941552U (en) | 2016-08-08 | 2016-08-08 | Concrete aggregate alkali activity verification model |
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| Publication Number | Publication Date |
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ID=57922785
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| CN201620851006.4U Active CN205941552U (en) | 2016-08-08 | 2016-08-08 | Concrete aggregate alkali activity verification model |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093359A (en) * | 2016-08-08 | 2016-11-09 | 中国电建集团贵阳勘测设计研究院有限公司 | Concrete aggregate alkali activity verification method and model thereof |
| CN111505044A (en) * | 2020-03-16 | 2020-08-07 | 佛山市至道科技实业有限公司 | Detection method for cement stability of ceramic polishing slag and application thereof |
| CN112098583A (en) * | 2020-09-26 | 2020-12-18 | 吉林建筑大学 | Method for rapidly identifying alkali active aggregate |
| WO2021036293A1 (en) * | 2019-08-26 | 2021-03-04 | 中交二公局第三工程有限公司 | Method for testing alkali reactivity of aggregate of concrete |
-
2016
- 2016-08-08 CN CN201620851006.4U patent/CN205941552U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093359A (en) * | 2016-08-08 | 2016-11-09 | 中国电建集团贵阳勘测设计研究院有限公司 | Concrete aggregate alkali activity verification method and model thereof |
| WO2021036293A1 (en) * | 2019-08-26 | 2021-03-04 | 中交二公局第三工程有限公司 | Method for testing alkali reactivity of aggregate of concrete |
| CN111505044A (en) * | 2020-03-16 | 2020-08-07 | 佛山市至道科技实业有限公司 | Detection method for cement stability of ceramic polishing slag and application thereof |
| CN112098583A (en) * | 2020-09-26 | 2020-12-18 | 吉林建筑大学 | Method for rapidly identifying alkali active aggregate |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |