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Device for measuring rheological parameters of fresh concrete

A rheological parameter and concrete technology, applied in the direction of measuring devices, flow characteristics, instruments, etc., can solve the problems of inaccurate measurement results, limitations of the adaptability of existing technologies, etc., to expand the measurement range, accurate and reliable measurement data, and low cost. Effect

Inactive Publication Date: 2012-07-18
HARBIN INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of inaccurate measurement results and limited adaptability of the existing technology in measuring the rheological parameters of fresh concrete, and to provide a device for measuring the rheological parameters of fresh concrete

Method used

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  • Device for measuring rheological parameters of fresh concrete
  • Device for measuring rheological parameters of fresh concrete
  • Device for measuring rheological parameters of fresh concrete

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Experimental program
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Effect test

specific Embodiment approach 1

[0009] Specific implementation mode one: combine figure 1 and figure 2 Describe this embodiment, a device for measuring the rheological parameters of fresh concrete in this embodiment includes a cylindrical container 1, a first casing 2, a second casing 3, a vertical rod 4, a shaft rod 5, and a conical cylinder 7. The first timing switch 6, the second timing switch 8, the pulling rod 9, the weight 10, the cylinder 11, the disk 12, the ring 13, the concrete vibrating table 14 and the timer 16, the cone cylinder 7 Both the small diameter end and the large diameter end are open ends, the two ends of the cylinder 11 are both open ends, the small diameter end and the large diameter end of the conical cylinder 7 are coaxially arranged, and one end of the first sleeve 2 The end face of the cylindrical container 1 is fixedly installed on the end face of the bottom of the cylindrical container 1, the first sleeve 2 is coaxially arranged with the cylindrical container 1, and a disc 12...

specific Embodiment approach 2

[0011] Specific implementation mode two: combination figure 1 To illustrate this embodiment, the cylindrical container 1, shaft rod 5, cone 7 and cylinder 11 described in this embodiment are all made of steel plates, the disc 12 is a steel disc, and the ring 13 is a steel ring . With such setting, the durability performance is high, and the design requirements and actual needs are met. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0012] Specific implementation mode three: combination figure 2 The present embodiment will be described. The inner diameter D of the cylindrical container 1 according to the present embodiment is 100 mm to 110 mm, and the height H1 is 80 mm to 90 mm. This setting can meet the measurement needs. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a device for measuring rheological parameters of concrete, and particularly relates to a device for measuring rheological parameters of fresh concrete, so as to solve the problem of inaccurate measuring result in the prior art for measuring the rheological parameters of the fresh concrete and the problem that the adaptability of the prior art is limited. The device comprises a cylindrical container, a first casing pipe, a second casing pipe, an upright rod, a shaft rod, a conical cylinder, a first time switch, a second time switch, a deflector rod, a weight, a cylinder,a disc, a ring, a concrete vibrating platform and a timer, wherein the end face of one end of the first casing pipe is fixedly arranged on the end face of the bottom in the cylindrical container; theend face of the other end of the cylinder is connected with the end face of one end of the ring; one end of the shaft rod is placed in the first casing pipe; the end face of one end of the shaft rod is propped against the end face of the bottom in the cylindrical container; the weight is arranged on the upper end face of the disc; and the cylindrical container is fixedly arranged on the surface of the concrete vibrating platform. The device is used for measuring the rheological parameters of the fresh concrete.

Description

technical field [0001] The invention relates to a device for measuring rheological parameters of concrete. Background technique [0002] The freshly mixed concrete belongs to Bingham body and conforms to the rheological equation: τ=τ 0 +η(dγ / dt), where: τ is the shear stress, τ 0 is the yield stress, η is the plastic viscosity, (dγ / dt) is the shear rate, and the rheological properties of fresh concrete must be at least yield stress τ 0 And plastic viscosity η these two parameters to characterize. When the external force τ is less than the friction between the particles of the liquid-solid mixture, the mixture does elastic elongation, the particles do not move, and the Bingham body does not flow; when τ is equal to the friction between the particles of the liquid-solid mixture , the stress in the mixture remains constant and the particles move continuously. At this time, τ is the yield stress τ 0 . If there is no viscosity, this is Saint-Venant solid, but due to the cert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N11/12
Inventor 杨英姿
Owner HARBIN INST OF TECH
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