JPH07234180A - Rheology constant measuring instrument for non-hardended concrete - Google Patents

Abstract

PURPOSE:To quantitatively provide a device for expressing the property of non-hardened concrete etc., with rheology constant. CONSTITUTION:A sample such as non-hardened concrete to be measured is introduced into a body center open container 13 and then a pressurized plate 9 is penetrated through the sample. The penetrated pressurized plate is subjected to repeated pressurization at several different penetration speeds, rheology constant is calculated from the resultant resistance, and then a quantitative evaluation is performed based on the numerical expression.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring device capable of quantitatively evaluating a slump value and other properties from a rheological constant of ready-mixed concrete.

[0002]

2. Description of the Related Art The properties of ready-mixed concrete and the like have been evaluated by a slump test using a slump cone.

[0003]

In the conventional slump test, it was difficult to quantitatively evaluate the sample due to a large artificial error. Therefore, an attempt is made to solve the above-mentioned drawbacks by mechanizing a series of operations. Further, the properties of various concretes such as specially mixed concrete are not sufficient if evaluated only by a slump test, but this problem can be solved by the quantitative numerical evaluation derived from the rheological constant of the present invention.

[0004]

According to the present invention, a sample to be measured such as ready-mixed concrete is put into an open container in the center of the device, a pressure plate is penetrated into the sample, and pressure is applied several times from a predetermined position at different speeds. When intermittently repeating, the rheological constant is calculated from the resistance value generated at each pressurization, and the numerical value that can be quantitatively evaluated based on this mathematical formula is used to solve the problem.

[0005]

The sample placed in the open container in the center of the device is pressurized by the lowering of the upper pressure plate. The pressure plate penetrated into the sample is repeatedly pressurized at several different penetration speeds. The rheological constant is calculated from the multiple resistance values sensed by the load cell at each pressurization, and the numerical value that can be quantitatively evaluated based on this is obtained by analytical calculation.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to the accompanying drawings. 1 is a motor for raising and lowering the pressure plate, a drive unit for 3 gears, 4 load cells for sensing pressure resistance value, 5 operation panel for operating a series of operations, a computer for analyzing and calculating mathematical expressions, and electric signals from the outside. It is a head unit composed of six external input / output terminals for inputting / outputting and a power supply terminal. 7 is a slide pipe for raising and lowering the pressure plate. 8 is a pipe that supports the pressure plate. 9 is a pressure plate. 10 is a handle. 11
Is an arm that connects the head to the column. 12 is a support for the head. 13 is an open container into which the sample is put. Reference numeral 14 is a base for supporting the measuring apparatus body and for installing and fixing the open container of 13.

Further, the head portion 1 can be easily attached to and detached from the arm 11 by rotating the handle 10, and the head portion 1 alone can perform the measurement work of the sample.

Since one embodiment of the present invention is configured as described above, it becomes possible to mount it on a plant mixer of a ready-mixed concrete factory or a drum of a mixer car through a mixer-drum inspection door. Quantitative evaluation of samples can be easily performed in all situations from the manufacturing process to transportation and immediately before placement.

[0009]

As described above, the rheology constant measuring device for ready-mixed concrete or the like of the present invention is capable of expressing the properties of Bingham fluid such as ready-mixed concrete mainly as a numerical value that can be evaluated in multiple ways and quantitatively. Since it is a device, it is possible to accurately grasp its properties, which is useful for leveling construction work and improving the quality of concrete structures and the like. In addition, it is useful for leveling and manualizing during production of ready-mixed concrete at ready-mixed concrete factories, secondary concrete product factories, etc., and can make a great contribution to the construction of unmanned plants.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a rheology constant measuring device for ready-mixed concrete or the like according to the present invention.

FIG. 2 is a front view of a main body portion.

[Explanation of symbols]

 1 head part 2 motor 3 gear part 4 load cell 5 operation panel and analytical calculation computer 6 external input / output terminal and power supply terminal 7 slide pipe 8 pipe 9 pressure plate 10 handle 11 arm 12 column 13 open container 14 base

Claims (1)

[Claims] 1. When a predetermined amount of a sample to be measured such as ready-mixed concrete is put into an open container in the center of the apparatus, a pressure plate is penetrated into the sample, and intermittent pressurization is repeated several times from a predetermined position at different speeds. A rheological constant measuring device characterized in that the rheological constant of a sample is calculated from the resistance value generated at each pressurization and quantitative numerical evaluation is performed.