CN108982820A - A kind of device and method of construction site detection concrete disintegration rate and stability - Google Patents
A kind of device and method of construction site detection concrete disintegration rate and stability Download PDFInfo
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- CN108982820A CN108982820A CN201810798894.1A CN201810798894A CN108982820A CN 108982820 A CN108982820 A CN 108982820A CN 201810798894 A CN201810798894 A CN 201810798894A CN 108982820 A CN108982820 A CN 108982820A
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- 238000010276 construction Methods 0.000 title claims abstract description 16
- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000002955 isolation Methods 0.000 claims abstract description 36
- 239000002002 slurry Substances 0.000 claims description 15
- 238000004458 analytical method Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000011156 evaluation Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 abstract description 12
- 238000012360 testing method Methods 0.000 abstract description 8
- 238000005345 coagulation Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 230000009191 jumping Effects 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 240000005373 Panax quinquefolius Species 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
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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
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
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- 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 device and methods of construction site detection concrete disintegration rate and stability, device includes container, the opening and baffle that container top, middle part and bottom is arranged in, the baffle is connected by connection bolt and open bottom, baffle two sides are equipped with fixed device, the fixed device is separately positioned on opening two sides and corresponding baffle two sides, for fixed baffle, make closure of openings.The present invention can accurately test the isolation rate and stability of concrete, while can evaluate concrete pumpability with stability of the quantitative forecast concrete in pumping procedure.
Description
Technical field
The present invention relates to workability of concrete testing field, concretely relate to a kind of construction site detection concrete from
The device and method of analysis rate and stability.
Background technique
The stability of concrete is primarily referred to as its ability for resisting isolation, is an important performance of fresh concrete, mixes
Solidifying soil, since the sinking of aggregate or floating are likely to isolate, causes to stablize in stirring, transport, pumping and casting process
Property be deteriorated.With the continuous rise of current super high-rise building, the pumping distance of concrete is continuously increased, in super high-rise pumping process
In, concrete residence time in pump line is longer, since isolation causes plugging phenomenon to occur frequently, seriously affects the pumpable of concrete
Property.During standing before pouring and condensing, due to the separation of aggregate and slurry, compression strength after concrete hardening will lead to
It is unevenly distributed, is also easy to produce the qualitative problems of construction such as contraction fissure.Therefore, the detection pair of fresh concrete isolation rate and stability
It is stirred, transport and pumping have directive significance, also most important to the quality control of concrete works.
At present about in agent on crack resistance of concrete segregability experimental study, mostly using isolation rate screen analysis test method and coarse aggregate to vibrate
Isolation rate jumping table test method measures its isolation rate, characterizes its stability by isolation rate.But isolation rate screen analysis test only passes through
Section concrete flows through the ratio of 4.75mm square hole screen slurry to characterize its education resistance energy on detection container, which is not enough to
The stability of concrete is represented, coarse aggregate vibration isolation rate jumping table test operation is more complex, and inconvenience is tested at the construction field (site).
Summary of the invention
In view of the defects and deficiencies of the prior art, the present invention intends to provide a kind of construction sites to detect concrete
The device of isolation rate and stability, it is easy to operate, the education resistance and stability of concrete can be accurately reflected, while can be pre-
Survey the pumpability of concrete.
To achieve the goals above, present invention employs following technical solutions:
A kind of device of construction site detection concrete disintegration rate and stability, including container, setting are on container
The opening and baffle in portion, middle part and bottom, the baffle is connected by connection bolt and open bottom, and baffle two sides are equipped with fixed dress
It sets, the fixed device is separately positioned on opening two sides and corresponding baffle two sides, is used for fixed baffle.
The container is cylindrical shape, and internal diameter 150mm, high 390mm are equally divided into three layers of upper, middle and lower along short transverse,
Each layer height 130mm.
The opening size is in the same size, and be open lateral arc length 160mm, longitudinal high 100mm, and open bottom is located at Sheng
In the bisector of glassware upper, middle and lower three parts and container bottom, it is ensured that equal from the amount of concrete of three opening outflows.
The baffle shapes are circular shape, and arc diameter is greater than drum diameter, internal diameter 152mm, and size is greater than opening,
Lateral arc length 170mm, longitudinal height 110mm, baffle can cover all opening when being closed, and prevent slurry from overflowing from opening,
Concrete is flowed out from outlet along baffle when baffle is opened.
The container is equipped with bung, and shape is circle, and diameter 160mm prevents moisture in concrete from evaporating, and top is equipped with
Handle, bottom are equipped with bottom plate, and shape is circle, diameter 200mm.
Specific step is as follows for the evaluation method:
Step 1: first being got up opening closure with baffle, baffle fixed, then concrete mix is fitted into container,
Bung is covered after filling, is placed on horizontal position, stands 10 minutes；
Step 2: first baffle is opened, and flows out layer concrete along first baffle from the first opening, then by second baffle
It opens, flows out intermediate layer concrete along second baffle from second outlet, then third baffle opened, make lower-layer concrete from the
Three openings are flowed out along third baffle, and each layer concrete is poured into 4.75mm standard square hole screen respectively, stands 120S；
Step 3: slurry quality and each layer concrete of three layer concrete of upper, middle and lower each by 4.75mm standard square hole screen are weighed
Quality, the above layer concrete account for the proportional representation of upper layer concrete quality M1 by the slurry quality m1 of 4.75mm standard square hole screen
The isolation rate SR1 of upper layer concrete, intermediate layer concrete account for middle layer by the slurry quality m2 of 4.75mm standard square hole screen and mix
The isolation rate SR2 of layer concrete, lower-layer concrete pass through 4.75mm standard square hole screen among the proportional representation of solidifying soil property amount M2
Slurry quality m3 accounts for the isolation rate SR3 of the proportional representation lower-layer concrete of lower-layer concrete mass M 3, finally calculates each layer coagulation
The difference of native isolation rate characterizes the education resistance and stability of concrete with this, and difference is smaller, indicates that fresh concrete is stablized
Property is better, and education resistance can be also better；
Agent on crack resistance of concrete segregability and stability are generally with the difference S of upper layer concrete disintegration rate and lower-layer concrete isolation rate come table
Show, formula is as follows:
In formula: S is stability indicator, is the difference of upper layer concrete disintegration rate and lower-layer concrete isolation rate；SR1, SR3 difference
For the isolation rate of the upper and lower concrete；M1, m3 are respectively that the upper and lower concrete passes through 4.75mm standard square hole screen
Slurry quality；M1, M3 are respectively the quality of the upper and lower concrete；
Step 4: evaluation index
As stability indicator S < 4%, concrete stability and education resistance are preferable, and pumpability is also preferable；When 4≤S≤7%
When, concrete stability and education resistance are general；As S > 7%, concrete stability and education resistance are poor, pumpability
It is poor.
The invention has the benefit that
1. container is divided into three layers of upper, middle and lower by the present invention, it is mixed to calculate each layer using isolation rate screen analysis test method layering
The isolation rate for coagulating soil, the education resistance and stability of concrete is measured using the difference of each layer concrete isolation rate, as a result more
Add reliable.
2. container of the present invention is cylindrical shape, diameter is consistent with conventional pump pipe size, is similar to one section of vertical pump line, contains
Glassware inner concrete state is close to the concrete state in pump line vertical in practical pumping procedure, so each layer coagulation calculated
The difference of native isolation rate more can reflect the stability of concrete in pumping procedure, can predict the pumpability of concrete, apply
Work scene, which carries out test, can instruct its pumping construction, especially super high-rise pumping.
3. the configuration of the present invention is simple, easy to operate, it is suitable for construction site, technical requirements are low.
Detailed description of the invention
Fig. 1 is a kind of structural representation of the device of construction site detection concrete disintegration rate and stability proposed by the present invention
Figure.
Specific embodiment
With reference to the accompanying drawing and specific embodiment, invention is further described in detail.
The device of the as shown in Figure 1 a kind of detection of construction site concrete disintegration rate and stability, including container 1, the
One the 3, second opening 4 of opening, third opening 5 and first baffle 6, second baffle 7, third baffle 8, bottom plate 9, fixed device 10,
Bolt 11 is connected, container 1 is equipped with bung 12, and top is equipped with handle 2, and bottom is equipped with bottom plate 9.
The course of work of the invention is as follows:
The present invention in use, first with first baffle 6, second baffle 7, third baffle 8 by first opening 3, second opening 4,
5 closure of third opening is got up, and then concrete mix is fitted into container 1, bung 12 is covered after filling, is placed on horizontal position
It sets, stands 10 minutes, then open first baffle 6, flow out layer concrete along first baffle 6 from the first opening 3, then
Second baffle 7 is opened, flows out intermediate layer concrete along second baffle 7 from second outlet 4, then third baffle 8 is opened, makes
Lower-layer concrete is flowed out from third opening 5 along third baffle 8, and each layer concrete is poured into 4.75mm standard square hole screen respectively,
Slurry quality and each layer concrete of three layer concrete of upper, middle and lower each by 4.75mm standard square hole screen are weighed after standing 120S
Quality accounts for each layer of proportional representation of each layer concrete quality with each layer concrete by the slurry quality of 4.75mm standard square hole screen
The isolation rate of concrete finally calculates the difference of each layer concrete isolation rate, characterizes the education resistance of concrete and steady with this
Qualitative, difference is smaller, indicates that fresh concrete stability is better, education resistance can be also better.Agent on crack resistance of concrete segregability and stabilization
Property is generally indicated with the difference S of upper layer concrete disintegration rate and lower-layer concrete isolation rate.
In order to more fully explain implementation of the invention, test of many times is carried out in building-site, following C40 and C60 are provided
Two groups of embodiments, every group is selected three examples.
Concrete match ratio such as table 1 in embodiment
1 concrete mix (kg/m of table3)
The isolation rate of upper, middle and lower layer concrete is respectively represented in this example, with SR1, SR2, SR3 with stability indicator S=
The value of SR1-SR3 indicates the education resistance and stability of concrete, test result such as table 2.
2 test result of table
This embodiment, which passes through, carries out isolation rate and stability test to the concrete of two kinds of labels of C40 and C60 at the construction field (site),
The result shows that the isolation rate of three layer concrete of upper, middle and lower is gradually reduced in container, upper layer concrete and lower-layer concrete from
Analysis rate difference is smaller, and concrete stability and education resistance are better, and pumpability is also better, conversely, difference is bigger, coagulation soil stabilization
Property and education resistance it is poorer, concrete disintegration is more serious, and plugging phenomenon may occur in pumping procedure, sometimes even can be quick-fried
Pipe.When concrete upper layer, isolation rate is larger, but the lower-layer concrete isolation rate difference on upper layer is smaller, at this time the stability of concrete
Preferably, pumpability is also preferable.
In general, as stability indicator S < 4%, concrete stability and education resistance are preferable, and pumpability is also preferable；When 4
When≤S≤7%, concrete stability and education resistance are general；As S > 7%, concrete stability and education resistance are poor,
Phenomena such as pumpability is also poor, and plugging is easy to happen in pumping procedure.So present invention the upper and lower concrete disintegration rate
Difference indicate the stability and education resistance of concrete, can more accurately predict stabilization of the concrete in pumping procedure
Property, evaluate the pumpability of concrete.
Claims (4)
1. the device of a kind of detection of construction site concrete disintegration rate and stability, it is characterised in that: including container (1), the
One opening (3), the second opening (4), third opening (5), first baffle (6), second baffle (7), third baffle (8), bottom plate
(9), fixed device (10) and connection bolt (11)；
The container (1) is cylindrical shape, and internal diameter 150mm, high 390mm are equally divided into three layers of upper, middle and lower along short transverse, often
One layer height is 130mm；Bottom is equipped with bottom plate (9)；
First opening (3), the second opening (4), third opening (5) size are consistent, lateral arc length 160mm, Zong Xianggao
100mm；
The first baffle (6), second baffle (7), third baffle (8) size are greater than the first opening (3), the second opening (4), the
Three openings (5), the first baffle (6), second baffle (7), third baffle (8) are respectively used to the first opening of closing (3), second
It is open (4), third opening (5)；
Baffle is connected by connection bolt and open bottom, and baffle two sides are equipped with fixed device, and fixed device is separately positioned on opening
Two sides and corresponding baffle two sides, are used for fixed baffle.
2. the device of a kind of construction site detection concrete disintegration rate and stability according to claim 1, feature exist
In: the container (1) is equipped with bung (12), and shape is circle, and diameter 160mm, top is equipped with bottom equipped with handle (2), bottom
Plate (9), shape are circle, diameter 200mm.
3. the device of a kind of construction site detection concrete disintegration rate and stability according to claim 1, feature exist
In: the first baffle (6), second baffle (7), third baffle (8) shape are circular shape, and circular arc internal diameter is 152mm, size
Greater than the first opening (3), the second opening (4), third opening (5), circular arc arc length 170mm is highly 110mm.
4. the method for application such as claim 1-3 any one described device, which is characterized in that specific step is as follows:
Step 1: respectively with first baffle (6), second baffle (7), the first opening (3) of third baffle (8) closing, the second opening
(4), concrete mix, is then fitted into container by third opening (5), is placed on horizontal position, stands 10 minutes；
Step 2: first baffle is opened, and flows out layer concrete along first baffle from the first opening, then by second baffle
It opens, flows out intermediate layer concrete along second baffle from second outlet, then third baffle opened, make lower-layer concrete from the
Three openings are flowed out along third baffle, and each layer concrete is poured into 4.75mm standard square hole screen respectively, stands 120S；
Step 3: slurry quality and each layer concrete of three layer concrete of upper, middle and lower each by 4.75mm standard square hole screen are weighed
Quality, the above layer concrete account for the proportional representation of upper layer concrete quality M1 by the slurry quality m1 of 4.75mm standard square hole screen
The isolation rate SR1 of upper layer concrete, intermediate layer concrete account for middle layer by the slurry quality m2 of 4.75mm standard square hole screen and mix
The isolation rate SR2 of layer concrete, lower-layer concrete pass through 4.75mm standard square hole screen among the proportional representation of solidifying soil property amount M2
Slurry quality m3 accounts for the isolation rate SR3 of the proportional representation lower-layer concrete of lower-layer concrete mass M 3, finally calculates each leafing analysis
The difference of rate characterizes the education resistance and stability of concrete with this, and difference is smaller, indicates that fresh concrete stability is got over
Good, education resistance can be also better；
Agent on crack resistance of concrete segregability and stability are generally with the difference S of upper layer concrete disintegration rate and lower-layer concrete isolation rate come table
Show, formula is as follows:
In formula: S is stability indicator, is the difference of upper layer concrete disintegration rate and lower-layer concrete isolation rate；SR1, SR3 difference
For the isolation rate of the upper and lower concrete；M1, m3 are respectively that the upper and lower concrete passes through 4.75mm standard square hole screen
Slurry quality；M1, M3 are respectively the quality of the upper and lower concrete；
Step 4: evaluation index
As stability indicator S < 4%, concrete stability and education resistance are preferable, and pumpability is also preferable；When 4≤S≤7%
When, concrete stability and education resistance are general；As S > 7%, concrete stability and education resistance are poor, pumpability
It is poor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810798894.1A CN108982820A (en) | 2018-07-19 | 2018-07-19 | A kind of device and method of construction site detection concrete disintegration rate and stability |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810798894.1A CN108982820A (en) | 2018-07-19 | 2018-07-19 | A kind of device and method of construction site detection concrete disintegration rate and stability |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884285A (en) * | 2019-03-06 | 2019-06-14 | 山东省交通科学研究院 | A kind of test method for Under Concrete isolation degree of vibrating |
| CN111707808A (en) * | 2020-05-12 | 2020-09-25 | 胡贤友 | Concrete pumpability detection device and method |
| CN112964596A (en) * | 2021-03-03 | 2021-06-15 | 中交上海三航科学研究院有限公司 | Method for testing segregation rate of coarse aggregate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884285A (en) * | 2019-03-06 | 2019-06-14 | 山东省交通科学研究院 | A kind of test method for Under Concrete isolation degree of vibrating |
| CN111707808A (en) * | 2020-05-12 | 2020-09-25 | 胡贤友 | Concrete pumpability detection device and method |
| CN112964596A (en) * | 2021-03-03 | 2021-06-15 | 中交上海三航科学研究院有限公司 | Method for testing segregation rate of coarse aggregate |
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Application publication date: 20181211 |