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Concrete viscometer

A viscometer and concrete technology, applied in the measurement of DC flow characteristics, etc., can solve the problems of inability to obtain the plastic viscosity and yield stress of fresh concrete, separation of aggregate and slurry, etc., achieving simple structure, small measurement error and high precision. Effect

Inactive Publication Date: 2013-10-23
江苏省金陵建工集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the stirring paddle of the existing rheometer easily separates the aggregate from the slurry during the stirring process, and cannot make the concrete form a stable homogeneous laminar flow state, and thus cannot obtain accurate plastic viscosity of freshly mixed concrete. and yield stress problems, while providing a concrete viscometer

Method used

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  • Concrete viscometer

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0009] Specific implementation mode one: combine figure 1 Explain that the concrete viscosity meter of this embodiment includes a bracket 1, a cylindrical container 2, an upper cover 3, a pressure gauge 4, a valve 5, an elbow 6, a steel plate 7, an insert plate 8, and a standpipe 9. Steel cylinder 10, sleeve pipe 11, electronic balance 12, steel plate 13, fixed plate 15, storage tank 17 and four rib plates 14, the upper end of cylindrical container 2 is connected with upper cover 3 by flange, and upper cover 3 is equipped with a pressure gauge 4 and a valve 5, and the valve 5 is connected to the output end of the air compressor. The lower end of the cylindrical container 2 is a cone 2-1, and the diameter of the lower end of the cone 2-1 is smaller than the diameter of the upper end. The lower end of 2-1 is connected to the upper end of the elbow 6, the lower end of the elbow 6 is arranged outside the support 1, and the inner hole at the end of the elbow 6 is provided with a fl...

specific Embodiment approach 2

[0010] Specific implementation mode two: combination figure 1 Explain that the bracket 1 of this embodiment includes a square frame 1-1, four columns 1-2 and four angle steels 1-3, the four columns 1-2 are arranged vertically and parallel to form a rectangle, and the square frame 1-1 is arranged on The upper ends of the four columns 1-2, the square frame 1-1 is welded to the four columns 1-2, the four angle steels 1-3 are arranged at the lower part of the columns 1-2, and welding is performed between every two adjacent columns 1-2 One angle steel 1-3. This embodiment has the characteristics of simple structure and stable operation. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0011] Specific implementation mode three: combination figure 1 Explain that the steel cylinder 10 of this embodiment is composed of an upper section 10-1 and a lower section 10-2, the upper section 10-1 and the lower section 10-2 are arranged up and down and made into one body, and the diameter of the upper section 10-1 is larger than that of the lower section 10-2. Diameter, the outer surface of the lower end of the lower section 10-2 is provided with external threads. The lower ends of sleeve pipe 11 and 10-2 are connected by thread, which is convenient for length adjustment. Other components and connections are the same as those in the first embodiment.

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Abstract

A concrete viscometer relates to an instrument used for measuring reheological parameter of concrete and aims at resolving the problem that a stirring paddle of the existing rheometer is apt to separate aggregate and slurry and cannot enable the concrete to form stable and homogeneous laminar states. The upper end of a cylindrical container is connected with an upper cover flange, a pressure meter and a valve are installed on an upper cover, a conical body at the lower end of the cylindrical container is connected with the upper end of a bending pipe, the lower end of the bending pipe is arranged outside a support, an insertion plate is installed in an inner hole at the tail end of the bending pipe, a vertical pipe is installed at the center position of the cylindrical container, the lower end of the vertical pipe is connected with the upper end of a steel cylinder, the lower portion of the steel cylinder penetrates out of the pipe wall of the bending pipe, the lower end of the steel cylinder is in screw connection with a sleeve, the lower end of the sleeve is supported by an electronic scale placed on a steel plate, the steel plate is supported by angle steel on the support, one right-angle side of each rib plate is welded on the outer wall of the cylindrical container, and the hypotenuse of each rib plate is clamped on a square frame on the support. The concrete viscometer is used for measuring plastic viscosity of fresh concrete.

Description

technical field [0001] The invention relates to an instrument 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. In short, yield stress is the minimum stress required to deform a material; plastic viscosity is a parameter that reflects the relationship between applied force and flow rate. [0003] In order to measure these two parameters, foreign scholars have done a lot of improvement work on the existing traditional rotary viscometer, such as G.H.Tattersall and his students improved the structure of the rheometer as early as the 1970s, designed a Different types of stirring paddles....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N11/06
Inventor 范广峰杨英姿杨英杰
Owner 江苏省金陵建工集团有限公司