CN102269685A - Method for detecting pumpability of haydite concrete - Google Patents
Method for detecting pumpability of haydite concrete Download PDFInfo
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- CN102269685A CN102269685A CN2011101864515A CN201110186451A CN102269685A CN 102269685 A CN102269685 A CN 102269685A CN 2011101864515 A CN2011101864515 A CN 2011101864515A CN 201110186451 A CN201110186451 A CN 201110186451A CN 102269685 A CN102269685 A CN 102269685A
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- concrete
- haydite
- slump cone
- haydite concrete
- pumpability
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Abstract
The invention relates to a method for detecting pumpability of haydite concrete The detecting method comprises the following steps: putting well stirred haydite concrete into a nonabsorbent container and standing for 30 minutes; putting a slump cone on a nonabsorbent plane which is solid and smooth, pouring out the haydite concrete, uniformly mixing, uniformly filling the concrete into the concrete slump cone in two uniform layers, tamping with a tamping rod 25 times for each layer until the concrete is filled to the top surface of the slump cone, scraping off the surplus concrete and trowelling; lifting the slump cone at uniform speed to enable the haydite concrete to flow freely on the plane, and starting to count time in seconds from the beginning of the lifting of the slump cone; and stopping counting time when the haydite concrete stops flowing, recording the time required by expansion flow of the concrete, using a steel ruler to measure the distances of the concrete in two directions at the maximum diameter and the minimal diameter after the expansion flow, taking the average value as the expansion flow degree and recording the value. The detecting method is simple to operate, and has the characteristics of visual evaluation result and strong comprehensiveness.
Description
Technical field
The invention belongs to the detection test method technical field of workability of concrete energy, particularly relate to a kind of detection method of haydite concrete pumpability.
Background technology
Haydite concrete is a kind of lightweight aggregate concrete, and its characteristics one are that used aggregate is that haydite (mainly being meant coarse aggregate) is lower than slurry density in the concrete, can be because pump pressure makes haydite before gather around to the obstruction of pump line mouth under pressure in the pumping process; The 2nd, haydite is because inner open structure, and is easy of haydite adsorbs the decline significantly that water in the concrete causes concrete flowability in a large number in transportation and pumping process.Thereby make haydite concrete in work progress, be difficult for pumping or the frequent situation that stifled pump takes place.
Still needleless can assay method to the corresponding pumpability of the performance characteristics formulation of haydite concrete at present.People often rule of thumb carry out subjective judgement in the production and construction process, the pumpability of haydite concrete are measured lack accurate, comprehensive decision procedure, have restricted the pumping technology development of haydite concrete.
Summary of the invention
Technical matters to be solved by this invention provides a kind of detection method of haydite concrete pumpability, measures the problem that lacks accurate, comprehensive decision procedure with haydite concrete pumpability in the solution prior art.
The technical solution adopted for the present invention to solve the technical problems is: a kind of detection method of haydite concrete pumpability is provided, and described detection method may further comprise the steps:
(1) haydite concrete that stirs is placed the container that does not absorb water, leave standstill 30min;
(2) slump cone is placed the solid smooth plane that do not absorb water, the haydite concrete that leaves standstill behind the 30min is poured out, after mix is even concrete is divided in the two-layer concrete slump tube of evenly packing into, insert with tamper for every layer and smash 25 times, until being filled to the slump cone end face, unnecessary concrete is scraped off, and floating;
(3) at the uniform velocity mention slump cone, allow haydite concrete flow freely in the plane, begin by timing second when beginning to carry slump cone;
(4) treat that haydite concrete stops timing when stopping to flow, and the expansion of record concrete flows the required time, measure the flow distance of expansion back maximum gauge and minimum diameter both direction of concrete, get its mean value, write down this value as the divergence that flows with steel ruler.
Described slump cone is 100 ± 1mm for the top internal diameter; The bottom internal diameter is 200 ± 1mm; Highly be 300 ± 1mm; Wall thickness is not less than the truncated cone Rotary-table of 3mm.
Beneficial effect
The present invention measures the needed time when reaching this divergence scope simultaneously by the mobile divergence of concrete slump tube mensuration haydite concrete, can carry out directly perceived, comprehensive evaluation to the pumpability of haydite concrete.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
According to the principal element that influences the haydite concrete pumpability: within the specific limits, the flowability of haydite concrete is big more, and pumpability can be high more; Within a certain period of time, the haydite in the haydite concrete is few more more little to concrete flowability affects to concrete water absorption; The cohesiveness of haydite concrete is good more, haydite difficult more with concrete in mortar laminated analysis.
By carrying out fluidity and measure, can evaluate haydite concrete through the fluidity size behind the haydite absorption concrete water to leaving standstill haydite concrete behind the 30min; And the flow speed of expansion of haydite concrete is slow more, and it is good more to react concrete cohesiveness, otherwise then poor more, by the flowing property and the adhesive aggregation performance of comprehensive evaluation haydite concrete, can make accurately the pumpability of haydite concrete, judge intuitively.
The invention provides a kind of detection method of haydite concrete pumpability, described detection method may further comprise the steps:
(1) haydite concrete that stirs is placed the container that does not absorb water, leave standstill 30min;
(2) slump cone is placed the solid smooth plane that do not absorb water, the haydite concrete that leaves standstill behind the 30min is poured out, after mix is even concrete is divided in the two-layer concrete slump tube of evenly packing into, insert with tamper for every layer and smash 25 times, until being filled to the slump cone end face, unnecessary concrete is scraped off, and floating;
(3) at the uniform velocity mention slump cone, allow haydite concrete flow freely in the plane, begin by timing second when beginning to carry slump cone;
(4) treat that haydite concrete stops timing when stopping to flow, and the expansion of record concrete flows the required time, measure the flow distance of expansion back maximum gauge and minimum diameter both direction of concrete, get its mean value, write down this value as the divergence that flows with steel ruler.
(5) table of comparisons 1, carries out the evaluation of haydite concrete pumpability, and wherein 1 is that pumpability is the poorest, and 5 is that pumpability is best.
Table 1
Described slump cone is 100 ± 1mm for the top internal diameter; The bottom internal diameter is 200 ± 1mm; Highly be 300 ± 1mm; Wall thickness is not less than the truncated cone Rotary-table of 3mm.
Claims (2)
1. the detection method of a haydite concrete pumpability is characterized in that, described detection method may further comprise the steps:
(1) haydite concrete that stirs is placed the container that does not absorb water, leave standstill 30min;
(2) slump cone is placed the solid smooth plane that do not absorb water, the haydite concrete that leaves standstill behind the 30min is poured out, after mix is even concrete is divided in the two-layer concrete slump tube of evenly packing into, insert with tamper for every layer and smash 25 times, until being filled to the slump cone end face, unnecessary concrete is scraped off, and floating;
(3) at the uniform velocity mention slump cone, allow haydite concrete flow freely in the plane, begin by timing second when beginning to carry slump cone;
(4) treat that haydite concrete stops timing when stopping to flow, and the expansion of record concrete flows the required time, measure the flow distance of expansion back maximum gauge and minimum diameter both direction of concrete, get its mean value, write down this value as the divergence that flows with steel ruler.
2. a kind of method that detects the pumpability of haydite concrete according to claim 1 is characterized in that, described slump cone is 100 ± 1mm for the top internal diameter; The bottom internal diameter is 200 ± 1mm; Highly be 300 ± 1mm; Wall thickness is not less than the truncated cone Rotary-table of 3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101864515A CN102269685A (en) | 2011-07-05 | 2011-07-05 | Method for detecting pumpability of haydite concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101864515A CN102269685A (en) | 2011-07-05 | 2011-07-05 | Method for detecting pumpability of haydite concrete |
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| Publication Number | Publication Date |
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| CN102269685A true CN102269685A (en) | 2011-12-07 |
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| CN2011101864515A Pending CN102269685A (en) | 2011-07-05 | 2011-07-05 | Method for detecting pumpability of haydite concrete |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519841A (en) * | 2011-12-31 | 2012-06-27 | 中联重科股份有限公司 | Method and device for detecting pumpability of concrete |
| CN103105346A (en) * | 2013-01-16 | 2013-05-15 | 浙江大学 | Method for testing workability rheological parameter range of concrete |
| CN103675245A (en) * | 2013-12-17 | 2014-03-26 | 中国建筑第八工程局有限公司 | Method and device for detecting ultrahigh pumpability of concrete |
| 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 |
| CN111912746A (en) * | 2020-06-09 | 2020-11-10 | 广西大学 | Quantitative evaluation method for analyzing concrete workability based on bottom resistance |
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| JPH10119029A (en) * | 1996-08-27 | 1998-05-12 | Taisei Corp | Test method for pressure-feeding property by pump for cement admixture |
| JP2004170332A (en) * | 2002-11-22 | 2004-06-17 | Fujita Corp | Method for evaluating property of highly fluidic fresh concrete |
| CN101008640A (en) * | 2007-02-02 | 2007-08-01 | 中南大学 | Integrated device for measurement and evaluation of workability of self-compacting concrete |
| CN101308075A (en) * | 2008-07-11 | 2008-11-19 | 济南四建（集团）有限责任公司 | High-performance concrete flow down time measurement instrument and determination method |
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2011
- 2011-07-05 CN CN2011101864515A patent/CN102269685A/en active Pending
Patent Citations (4)
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| JPH10119029A (en) * | 1996-08-27 | 1998-05-12 | Taisei Corp | Test method for pressure-feeding property by pump for cement admixture |
| JP2004170332A (en) * | 2002-11-22 | 2004-06-17 | Fujita Corp | Method for evaluating property of highly fluidic fresh concrete |
| CN101008640A (en) * | 2007-02-02 | 2007-08-01 | 中南大学 | Integrated device for measurement and evaluation of workability of self-compacting concrete |
| CN101308075A (en) * | 2008-07-11 | 2008-11-19 | 济南四建（集团）有限责任公司 | High-performance concrete flow down time measurement instrument and determination method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519841A (en) * | 2011-12-31 | 2012-06-27 | 中联重科股份有限公司 | Method and device for detecting pumpability of concrete |
| CN103105346A (en) * | 2013-01-16 | 2013-05-15 | 浙江大学 | Method for testing workability rheological parameter range of concrete |
| CN103675245A (en) * | 2013-12-17 | 2014-03-26 | 中国建筑第八工程局有限公司 | Method and device for detecting ultrahigh pumpability of concrete |
| CN103675245B (en) * | 2013-12-17 | 2015-11-18 | 中国建筑第八工程局有限公司 | For detecting the method and apparatus of concrete ultra-high pumping performance |
| 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 |
| CN108645754B (en) * | 2018-05-23 | 2021-12-21 | 南京航空航天大学 | Device and method for testing initial setting time of foam concrete |
| CN111912746A (en) * | 2020-06-09 | 2020-11-10 | 广西大学 | Quantitative evaluation method for analyzing concrete workability based on bottom resistance |
| CN111912746B (en) * | 2020-06-09 | 2022-08-02 | 广西大学 | Quantitative evaluation method for analyzing concrete workability based on bottom resistance |
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Application publication date: 20111207 |