CN113848705A - Concrete mixture workability informatization intelligent regulation and control method - Google Patents
Concrete mixture workability informatization intelligent regulation and control method Download PDFInfo
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Abstract
The invention relates to an informationized intelligent regulation and control method for the workability of concrete mixtures, belongs to the technical field of concrete, and is used for realizing intelligent, accurate and automatic compensation and restoration of the workability of the concrete mixtures. Firstly, preparing concrete mixtures with different strength grades under the same proportioning condition corresponding to the actual engineering, and detecting the initial slump of the concrete mixtures; secondly, placing the mixture in a sealed barrel, and standing for a period of time; then, when the time is up, uniformly stirring the concrete mixture in the sealed barrel again, adjusting the back-mixing amount of the admixture, and respectively recording the slump constant and the loss value with time; then, fitting according to the large data of admixture back-mixing amount required by the loss of different slump degrees with time to obtain concrete mixture workability intelligent regulation and control equations with different strength grades; and finally, calculating the additive back-mixing compensation amount actually required in real time based on the intelligent control equation according to the concrete slump value actually measured on the engineering site.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to an informationized intelligent regulation and control method for workability of concrete mixtures.
Background
After the concrete mixture leaves a factory, due to the influences of factors such as transportation time, waiting time, cement hydration, water evaporation and the like, the fluidity of different degrees is lost over time, the slump expansion index of the concrete is reduced, and the workability of the concrete mixture before pumping is difficult to meet the construction requirement.
At present, secondary water adding measures are often adopted in engineering practice, the manual operation is carried out by means of personal experience or even personal preference basically, the water-cement ratio of the concrete can be enlarged, the design of the mix proportion of the concrete is changed, concrete segregation and bleeding are caused, further engineering accidents such as pipe blockage and pipe explosion and the like occur, the mechanical strength of the concrete can be reduced to different degrees, and hidden troubles of the quality of the concrete are caused.
Therefore, research on an informatization intelligent regulation and control method for the workability of the concrete mixture is urgently needed, so that the intelligent and accurate compensation and restoration of the workability of the concrete mixture are realized, and technical guarantee is provided for smooth pumping construction.
Disclosure of Invention
The invention aims to provide an informatization intelligent regulation and control method for the workability of concrete mixtures, which is established by adopting a reverse back-mixing compensation mechanism based on the workability compensation rules of concrete mixtures with different strength grades, realizes the intelligent, accurate and automatic compensation and restoration of the workability of the concrete mixtures, and meets the concrete pumping construction requirements.
In order to solve the technical problems, the technical scheme of the invention is as follows:
an informationized intelligent regulation and control method for workability of concrete mixtures comprises the following steps:
step S10, preparing concrete mixtures with different strength grades under the same proportioning condition corresponding to the actual engineering, and detecting the initial slump S of the concrete mixtures0；
Step S20, placing the prepared concrete mixture with different strength grades in a sealed barrel, standing for a period of time
Step S30, when the time is up, the sealed barrel is put inThe concrete mixture is stirred again uniformly, and the back-mixing quantity K of the additive is recorded1When the slump constant is 0, the slump constant S is measured1Recording the slump loss value X with time1＝S0-S1；
Step S40, back-mixing the mixture into the concrete mixture with the mass K2The admixture is stirred uniformly, and the slump constant S of the admixture is detected2Recording the slump loss value X with time2＝S0-S2；
Step S50, repeating step S40, recording the cumulative back-mixing amount K of the admixture3，K4…KnDetecting its slump S3，S4…SnRecording the corresponding slump loss value X with time3，X4…XnUntil the slump of the concrete mixture is consistent with the initial slump, and S is obtained at the momentn＝S0Slump loss value X with timen＝S0-Sn＝0；
Step S60, calculating the loss X of different slump degrees with time1，X2…XnUnder the condition, the corresponding admixture back-mixing amount K of the admixture required for restoring the slump of the concrete mixture to the initial staten-K1，Kn-K2…Kn-KnAre respectively denoted by f(x)1，f(x)2…f(x)n；
Step S70, fitting to obtain concrete mixture workability intelligent regulation and control equations with different strength grades according to large admixture back-mixing amount data required by the concrete mixtures with different slump losses over time: (x) ax2+ bx + c, wherein f (x): compensation amount of single concrete mixture additive, unit kg; x: the concrete slump loss in unit of mm over time, wherein a, b and c are coefficients;
and step S80, based on the concrete mixture workability intelligent regulation and control equation with different strength grades, combining an information-based intelligent regulation and control system, and according to the actual measured concrete slump value of the engineering site, calculating the actually required admixture back-mixing compensation quantity in real time, thereby realizing the intelligent, accurate and automatic compensation and restoration of the concrete mixture workability and meeting the concrete pumping construction requirements.
Further, the different strength grades of the concrete are C30-C60.
Further, the elapsed time in step S20 is 3 h.
Furthermore, the information-based intelligent regulation and control system takes a PLC (programmable logic controller), a power system and a conveying pipeline as core modules.
Further, when the strength grade of the concrete is C30, the value of a is-7.954 e-05, the value of b is 0.01869, and the value of C is 0.1288.
Further, when the strength grade of the concrete is C35, the value of a is-2.628 e-06, the value of b is 0.00652, and the value of C is 0.03974.
Further, when the strength grade of the concrete is C40, the value of a is-0.0001239, the value of b is 0.02102, and the value of C is-0.01296.
Further, when the concrete strength grade is C45, the value of a is 1.77e-06, the value of b is 0.01042, and the value of C is 0.0199.
Further, when the strength grade of the concrete is C50, the value of a is 9.512e-06, the value of b is 0.003783, and the value of C is 0.06313.
Further, when the strength grade of the concrete is C60, the value of a is-4.583 e-05, the value of b is 0.01388, and the value of C is 0.01341.
Compared with the prior art, the invention has the beneficial technical effects that:
(1) the invention provides an informationized intelligent regulation and control method for workability of concrete mixtures0(ii) a Secondly, placing the mixture in a sealed barrel, and standing for a period of time; then, when the time is up, uniformly stirring the concrete mixture in the sealed barrel again, adjusting the back-mixing amount of the admixture, and recording the slump constant and the loss value over time; then, fitting according to the large data of admixture back-mixing amount required by the loss of different slump degrees with time to obtain concrete mixture workability intelligent regulation and control equations with different strength grades; finally, information is combined based on the intelligent regulation and control equationThe intelligent control system calculates the additive back-mixing compensation amount actually needed in real time according to the actual measured concrete slump value of an engineering site. According to the method, the intelligent regulation and control method for the workability of the concrete mixture, which takes the intelligent regulation and control equation for the workability of the concrete mixture with different strength grades as a core, is established, so that the intelligent, accurate and automatic compensation and repair of the workability of the concrete mixture are realized, and the concrete pumping construction requirement is met.
(2) The concrete mixture workability informatization intelligent regulation and control method provided by the invention can greatly improve the intellectualization and informatization level of the traditional concrete quality management, promotes the industry leap-type development, and has the characteristics of scientificity, simplicity, high reliability and the like, and the market popularization prospect is wide.
Drawings
FIG. 1 is a flow chart of an informationized intelligent regulation and control method for workability of concrete mixtures in an embodiment of the present invention.
Detailed Description
The concrete mixture workability informatization intelligent regulation and control method provided by the invention is further explained in detail by combining the attached drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. For convenience of description, the directions of "up" and "down" described below are the same as the directions of "up" and "down" in the drawings, but this is not a limitation of the technical solution of the present invention.
The concrete mixture workability informatization intelligent control method is described in detail below with reference to fig. 1.
Example one
The embodiment provides an informatization intelligent regulation and control method for workability of concrete mixtures, which comprises the following steps:
(1) preparing concrete mixture with different strength grades (such as C30-C60) under the same proportioning condition corresponding to the actual engineering, and detecting the initial slump S0；
(2) Placing the prepared concrete mixture with different strength grades (such as C30-C60) in a sealed barrel, and standing for a certain period of time (such as 3 h);
(3) when the time is up, the concrete mixture in the sealed barrel is stirred uniformly again, and the back-mixing quantity K of the admixture is recorded1When the slump constant is 0, the slump constant S is measured1Recording the slump loss value X with time1＝S0-S1；
(4) The back mixing mass of the mixed material into the concrete mixture is K2The admixture is stirred uniformly, and the slump constant S of the admixture is detected2Recording the slump loss value X with time2＝S0-S2；
(5) Repeating the step (4), and recording the cumulative back doping amount K of the admixture3，K4…KnDetecting its slump S3，S4…SnRecording the corresponding slump loss value X with time3，X4…XnUntil the slump of the concrete mixture is consistent with the initial slump, and S is obtained at the momentn＝S0Slump loss value X with timen＝S0-Sn＝0；
(6) Calculating the loss X of different slump degrees with time according to the data1，X2…XnUnder the condition, the corresponding admixture back-mixing amount K of the admixture required for restoring the slump of the concrete mixture to the initial staten-K1，Kn-K2…Kn-KnAre respectively denoted by f(x)1，f(x)2…f(x)n；
(7) According to the large data of admixture back-mixing amount required by the time-lapse loss of different slump, fitting to obtain concrete mixture working intelligent control equations with different strength grades, wherein the concrete mixture working intelligent control equations with different strength grades basically accord with a parabolic law f (x) ax2+ bx + c, wherein f (x): compensation amount of single concrete mixture additive, unit kg; x: concrete slump loss in mm over time. The coefficients of the intelligent regulation equation for the workability of concrete mixtures of different strength grades are shown in table 1 below.
TABLE 1 coefficient table of intelligent regulation equation for workability of concrete mixtures with different strength grades
(8) Based on the concrete mixture workability intelligent regulation and control equation with different strength grades, the intelligent concrete mixture workability intelligent regulation and control system is combined with an information intelligent regulation and control system which takes a PLC (programmable logic controller), a power system and a conveying pipeline as core modules, and according to the actual measured concrete slump value of an engineering field, the additive back-mixing compensation quantity actually required is calculated in real time, so that the concrete mixture workability intelligent, accurate and automatic compensation and restoration are realized, and the concrete pumping construction requirement is met.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (10)
1. An informatization intelligent regulation and control method for workability of concrete mixtures is characterized by comprising the following steps:
step S10, preparing concrete mixtures with different strength grades under the same proportioning condition corresponding to the actual engineering, and detecting the initial slump S of the concrete mixtures0；
Step S20, placing the prepared concrete mixtures with different strength grades in a sealed barrel, and standing for a period of time;
step S30, when the time is up, uniformly re-stirring the concrete mixture in the sealed barrel, and recording the back-mixing amount K of the admixture1When the slump constant is 0, the slump constant S is measured1Recording the slump loss value X with time1＝S0-S1；
Step S40, back-mixing the mixture into the concrete mixture with the mass K2The admixture is stirred uniformly, and the slump constant S of the admixture is detected2Recording the slump loss value X with time2＝S0-S2；
Step S50, repeating step S40, recording the additive accumulationMixing amount K3，K4···KnDetecting its slump S3，S4···SnRecording the corresponding slump loss value X with time3，X4···XnUntil the slump of the concrete mixture is consistent with the initial slump, and S is obtained at the momentn＝S0Slump loss value X with timen＝S0-Sn＝0；
Step S60, calculating the loss X of different slump degrees with time1，X2···XnUnder the condition, the corresponding admixture back-mixing amount K of the admixture required for restoring the slump of the concrete mixture to the initial staten-K1，Kn-K2···Kn-KnAre respectively denoted by f(x)1，f(x)2···f(x)n；
Step S70, fitting to obtain concrete mixture workability intelligent regulation and control equations with different strength grades according to large admixture back-mixing amount data required by the concrete mixtures with different slump losses over time: (x) ax2+ bx + c, wherein f (x): compensation amount of single concrete mixture additive, unit kg; x: the concrete slump loss in unit of mm over time, wherein a, b and c are coefficients;
and step S80, based on the concrete mixture workability intelligent regulation and control equation with different strength grades, combining an information-based intelligent regulation and control system, and according to the actual measured concrete slump value of the engineering site, calculating the actually required admixture back-mixing compensation quantity in real time, thereby realizing the intelligent, accurate and automatic compensation and restoration of the concrete mixture workability and meeting the concrete pumping construction requirements.
2. The intelligent informatization regulation and control method for workability of concrete mixtures according to claim 1, wherein the different strength grades of the concrete are C30-C60.
3. The intelligent informatization and control method of concrete mixture workability according to claim 1, wherein the period of time in the step S20 is 3 h.
4. The informatization intelligent regulation and control method for workability of concrete mixtures according to claim 1, characterized in that the informatization intelligent regulation and control system takes a PLC (programmable logic controller), a power system and a conveying pipeline as core modules.
5. The concrete mixture workability informatization intelligent regulation and control method of claim 1, characterized in that when the concrete strength grade is C30, a value is-7.954 e-05, b value is 0.01869, and C value is 0.1288.
6. The concrete mixture workability informatization intelligent control method according to claim 1, characterized in that when the concrete strength grade is C35, a value is-2.628 e-06, b value is 0.00652, and C value is 0.03974.
7. The concrete mixture workability informatization intelligent regulation and control method of claim 1, characterized in that when the concrete strength grade is C40, a takes the value of-0.0001239, b takes the value of 0.02102, and C takes the value of-0.01296.
8. The concrete mixture workability informatization intelligent control method according to claim 1, characterized in that when the concrete strength grade is C45, a value is 1.77e-06, b value is 0.01042, and C value is 0.0199.
9. The concrete mixture workability informatization intelligent regulation and control method of claim 1, characterized in that when the concrete strength grade is C50, a takes the value of 9.512e-06, b takes the value of 0.003783, and C takes the value of 0.06313.
10. The concrete mixture workability informatization intelligent regulation and control method of claim 1, characterized in that when the concrete strength grade is C60, a value is-4.583 e-05, b value is 0.01388, and C value is 0.01341.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN206657228U (en) * | 2017-03-31 | 2017-11-21 | 中交三公局第三工程有限公司 | A kind of concrete mixing intelligent monitoring and controlling device |
| CN108801857A (en) * | 2018-10-08 | 2018-11-13 | 上海建工集团股份有限公司 | Additive second compensation experimental rig and its control method |
| WO2019125813A1 (en) * | 2017-12-22 | 2019-06-27 | Verifi Llc | Managing concrete mix design catalogs |
| CN110480834A (en) * | 2019-07-16 | 2019-11-22 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of workability of concrete quick recovery system |
| CN111880408A (en) * | 2020-07-31 | 2020-11-03 | 广东技术师范大学 | Sludge drying chamber control method and system based on multi-sensor data fusion |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206657228U (en) * | 2017-03-31 | 2017-11-21 | 中交三公局第三工程有限公司 | A kind of concrete mixing intelligent monitoring and controlling device |
| WO2019125813A1 (en) * | 2017-12-22 | 2019-06-27 | Verifi Llc | Managing concrete mix design catalogs |
| CN108801857A (en) * | 2018-10-08 | 2018-11-13 | 上海建工集团股份有限公司 | Additive second compensation experimental rig and its control method |
| CN110480834A (en) * | 2019-07-16 | 2019-11-22 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of workability of concrete quick recovery system |
| CN111880408A (en) * | 2020-07-31 | 2020-11-03 | 广东技术师范大学 | Sludge drying chamber control method and system based on multi-sensor data fusion |
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