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Method for controlling concrete precooling slump by monitoring current intensity of stirrer

A current intensity and concrete technology, applied in the direction of control devices, etc., can solve the problems that cannot fully reflect the concrete slump and changes, heavy workload, and the concrete state cannot be adjusted in time, so as to increase the production efficiency of concrete and improve the quality of concrete. efficiency and the effect of reducing the amount of staffing

Active Publication Date: 2015-04-08
SHANDONG JIANZE CONCRETE
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of concrete construction, concrete slump is a very important indicator reflecting the workability of concrete. At present, the detection of concrete slump is only carried out through the national standard test, which requires a lot of work and only reflects the current situation. Or the workability of the truck concrete cannot fully reflect the slump and changes of all concrete
At present, most mixing plants estimate the slump by visually observing the state of the concrete leaving the machine, thereby reducing the inspection frequency, but this method has a large error and cannot predict the slump of the concrete leaving the machine stably.
The two methods of actual inspection and visual inspection cannot fully and accurately reflect the concrete slump. The most important thing is that the state of the concrete before leaving the machine cannot be adjusted in time, resulting in a large number of unqualified phenomena.

Method used

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  • Method for controlling concrete precooling slump by monitoring current intensity of stirrer
  • Method for controlling concrete precooling slump by monitoring current intensity of stirrer

Examples

Experimental program
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Effect test

Embodiment

[0012] Taking a mixing plant in Yushu as an example, the raw materials and mix ratios used in the production of C35 concrete are shown in Table 1.

[0013] Table 1 Raw materials and mix ratios used in C35 concrete

[0014]

[0015] After testing, when the 1# production line of the mixing station produces C35 concrete with 3 cubic meters per plate, when the slump range is 180±20mm, the meter shows that the current difference changes between 9.7 and 10.7A. figure 1 It is the relationship curve between the C35 concrete slump and the current difference of the mixing equipment. It can be seen that with the increase of the current difference of the mixing equipment, the concrete slump presents a linear decreasing trend. In actual production, the corresponding concrete slump can be inferred by observing the corresponding current difference with reference to this curve. When the inferred slump does not meet the construction requirements, the technicians will make adjustments in tim...

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PUM

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Abstract

The invention provides a method for controlling concrete precooling slump by monitoring current intensity of a stirrer. As for concrete at a certain mix proportion, if batch charge is the same, a slump value of the concrete is smaller, the concrete is thicker, the placeability of the concrete is poor, stirring resistance to a stirrer shaft is greater, the power consumed by the stirrer shaft is higher; on the contrary, the slump value of the concrete is larger, the placeability of the concrete is better, and the resistance to the stirrer shaft is smaller. A calculation formula of the power of the stirrer is that P is equal to U multiplied by I, wherein working current I is equal to P divided by V; voltage is invariable, and can be regarded as a constant; the power of the stirrer shaft varies with the current, and is proportional to the current, that is the slump value (SL) of the premixed concrete is inversely proportional to the current I when the stirrer shaft stirs the concrete; therefore, the concrete slump can be controlled by monitoring the current intensity of a motor of the stirrer; and the quality of the concrete is controlled finally. The method is simple and quick; the working strength of operators can be reduced effectively; the allocation of the operators can be reduced; a qualification rate of the concrete can be increased; and the production efficiency of the concrete can be improved.

Description

technical field [0001] The invention relates to the technical field of engineering construction, in particular to a method for controlling the slump of concrete out of the machine by monitoring the current intensity of a mixer. Background technique [0002] In the process of concrete construction, concrete slump is a very important indicator reflecting the workability of concrete. At present, the detection of concrete slump is only carried out through the national standard test, which requires a lot of work and only reflects the current situation. Or the workability of the truck concrete cannot fully reflect the slump and changes of all concrete. At present, most mixing plants estimate the slump by visually observing the state of the concrete leaving the machine, thereby reducing the inspection frequency, but this method has large errors and cannot predict the slump of the concrete leaving the machine stably. The two methods of actual inspection and visual inspection cannot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28C7/02
Inventor 王龙志张海霞张会冰陈国华王伟
Owner SHANDONG JIANZE CONCRETE
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