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Device and method for evaluating thixotropic property of fresh concrete

A technology for evaluating devices and concrete, applied in measurement devices, flow characteristics, instruments, etc., can solve problems such as the inability to characterize the cohesion of fresh concrete and the inability to consider the plasticity of concrete, and achieves good real-time detection, wide application range, and operation. easy effect

Pending Publication Date: 2022-04-22
CHINA STATE CONSTR READY MIXED CONCRETE CO LTD
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  • Description
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Problems solved by technology

However, this method has certain limitations and cannot characterize the cohesion of fresh concrete
Another example is that the Chinese utility model whose publication number is CN211453625U discloses a concrete thixotropic performance test device. By setting different stirring rates, the time required for extruding the same quality cement under the same pressure is tested, and the cement is used under different rotating speed conditions. The viscosity of the cement is used to characterize the thixotropic index of the cement, but this evaluation method has the problem that the plasticity of the concrete after extrusion cannot be considered

Method used

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  • Device and method for evaluating thixotropic property of fresh concrete

Examples

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Embodiment 1

[0033] as attached figure 1 As shown, a thixotropic performance evaluation device for fresh concrete includes a collecting hopper 2 fixed on a fixed bracket 1, and the collecting hopper 2 is connected with a diaphragm pump 6 through a first stainless steel braided pipe 4, and the diaphragm pump 6 is also passed through a second The stainless steel braided pipe 5 is connected with the horizontal conveying steel pipe 7, and the horizontal conveying steel pipe 7 is provided with a pressure sensor 10, and the horizontal conveying steel pipe 7 is connected to the discharge nozzle 12 through the stainless steel bend 11, and the discharge nozzle 12 is provided with a flowmeter 13. A stainless steel frame 14 is arranged below the feed nozzle, and a small support for assisting in supporting the discharge nozzle is arranged on the stainless steel frame 14 , and the stainless steel frame 14 is placed on the glass plate 15 .

[0034] The horizontal conveying steel pipe is fixed by the fir...

Embodiment 2

[0037] This embodiment provides a method for evaluating the thixotropic performance of fresh concrete. In order to facilitate the description of the method for evaluating the thixotropic performance of fresh concrete in this embodiment, the device for evaluating the thixotropic performance of fresh concrete is divided into concrete feeding areas , Concrete conveying area, concrete discharging area and concrete thixotropic performance testing area, wherein the concrete feeding area includes a collecting hopper and a rotating shaft; the concrete conveying area includes a stainless steel metal braided hose at the lower end of the collecting hopper, a pneumatic diaphragm pump and a horizontally placed Stainless steel pipes; the concrete discharge area includes stainless steel bends and discharge nozzles; the concrete thixotropic performance test area includes stainless steel frames and glass plates.

[0038] In this embodiment, the collecting hopper is a small stainless steel inver...

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Abstract

The invention discloses a fresh concrete thixotropic property evaluation device which comprises a collection hopper fixed on a fixed support, the collection hopper is connected with a diaphragm pump through a first stainless steel braided tube, the diaphragm pump is further connected with a horizontal conveying steel tube through a second stainless steel braided tube, and a pressure sensor is arranged in the horizontal conveying steel tube. The horizontal conveying steel pipe is connected with a discharging nozzle through a stainless steel bent pipe, a flowmeter is arranged on the discharging nozzle, a stainless steel frame is arranged below the discharging nozzle, and the stainless steel frame is placed on a glass plate. The invention also provides a method for evaluating the thixotropic property of the fresh concrete. By simulating the pumping and construction process of the fresh concrete, the pumpability of the fresh concrete can be evaluated, the thixotropic performance of the fresh concrete can be reflected in real time, and the evaluation method and device have the advantages of being easy and convenient to operate, efficient, good in detection real-time performance, wide in application range and the like.

Description

technical field [0001] The invention relates to a concrete performance evaluation device and method, in particular to a fresh concrete thixotropic performance evaluation device and method, belonging to the field of building concrete construction performance testing. Background technique [0002] Fresh concrete refers to the concrete that still has a certain degree of fluidity and plasticity during the period from the beginning of mixing various cementitious materials to the completion of the on-site grouting stage. As a typical building material with high thixotropy, the working performance of fresh concrete will gradually change with the passage of mixing time, which has great influence on the pumpability of concrete itself and the performance of cementitious materials after hardening. Significant influence. Thixotropic performance, as the most important characteristic of the flow behavior in the process of concrete pumping, can directly reflect the working performance of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/38G01N11/00
CPCG01N33/383G01N11/00Y02W30/91
Inventor 田宇黄汉洋谯理格郑伟豪万世辉陈晨
Owner CHINA STATE CONSTR READY MIXED CONCRETE CO LTD
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