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Fresh concrete segregation resistance testing device and method

A testing device and concrete technology, applied in measurement devices, analytical materials, instruments, etc., can solve the problems of demanding testing environmental conditions, affecting the bearing capacity of concrete structures, poor accuracy, etc., to achieve a wide range of applications, improve testing accuracy, reduce The effect of operating time

Inactive Publication Date: 2018-06-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcomings of existing fresh concrete stability and uniformity testing methods, which may seriously affect the bearing capacity of concrete structures, poor precision, and strict requirements on testing environment conditions, and propose a fresh concrete anti-corrosion test method. Test device and method for segregation performance

Method used

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  • Fresh concrete segregation resistance testing device and method
  • Fresh concrete segregation resistance testing device and method
  • Fresh concrete segregation resistance testing device and method

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Experimental program
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specific Embodiment approach 1

[0017] This embodiment provides a test device for the anti-segregation performance of freshly mixed concrete, such as figure 1 shown, including:

[0018] Four side walls, a top cover 5, a bottom plate 9 and the cavity surrounded by it, the container 4 is used to hold fresh concrete samples to be tested. Wherein at least one electrode plate 6 is provided at a predetermined height inside the first side wall, and an electrode plate 6 of the same size is provided at the same height of the second side wall opposite to the first side wall; the same side wall The distances between the electrode plates 6 are the same, and the electrode plates 6 are separated by insulating materials; the first side wall and the second side wall are also provided with holes 7 for leading out wires 8, and one end of the wires is connected to the electrode plates 6 , the other end is used as the fixed end of the double-pole multi-throw switch 3; the wire can be arranged outside the side wall. The corres...

specific Embodiment approach 2

[0021] This embodiment includes a test method for the anti-segregation performance of freshly mixed concrete, which is based on figure 1 The test device for the anti-segregation performance of freshly mixed concrete is realized, and the method specifically includes:

[0022] Step 1. Open the top cover of the device, and put the fresh concrete sample to be tested into the device; under the vibration of the concrete vibrating table or the vibrating rod, ensure that the fresh concrete sample is densely filled in each area of ​​the container, and the upper surface smooth.

[0023] Step 2. Close the top cover and turn on the DC current source switch.

[0024] Step 3. Connect the DPMT switch to any one of the non-moving ends, press the test button of the resistance tester, and record the resistance value R in the display screen. i , and press the stop button; the subscript i can be understood as the value measured at the i-th fixed end connected, or the value corresponding to the ...

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Abstract

The invention relates to the field of fresh concrete whole stability and evenness testing, specifically relates to a fresh concrete segregation resistance testing device and a method and aims at solving the defects that an existing fresh concrete stability and evenness testing method may seriously affect concrete structure bearing capacity and has poor accuracy and rigorous requirements for testing environment conditions. The fresh concrete segregation resistance testing device comprises four lateral walls, a top cover and a bottom plate, wherein at least one electrode plate is arranged at thepreset height position of the inner side of the first lateral wall, and an electrode plate of the same size as the electrode plate on the first lateral wall is arranged at the same height position ofthe second lateral wall opposite to the first lateral wall; one end of a wire is connected with the electrode plate, and the other end of the wire can serve as a fixed end of a double-pole multiple-throw switch; the wires guided out from the electrode plates at the same height positions of the lateral walls correspond to the fixed end and can be chosen by a movable end at the same time; the movable end of the double-pole multiple-throw switch is electrically connected with a resistance test instrument. The fresh concrete segregation resistance testing device disclosed by the invention is suitable for fresh concrete segregation resistance testing.

Description

technical field [0001] The invention relates to the field of testing the overall stability and uniformity of fresh concrete, in particular to a test device and method for the anti-segregation performance of fresh concrete. Background technique [0002] With the rapid development of modern economy and science and technology, various building forms are constantly emerging, and high-rise and super high-rise buildings are increasing day by day. As one of the most widely used civil engineering materials at present, concrete must have better workability in the freshly mixed state in order to meet the needs of various construction links of various modern buildings. The workability of fresh concrete generally includes fluidity, cohesion and water retention. In the construction process, in order to meet the large fluidity of fresh concrete, its cohesion is often ignored, and the phenomenon of concrete segregation occurs. Concrete segregation is caused by the lack of cohesion betwee...

Claims

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Application Information

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IPC IPC(8): G01N33/38
CPCG01N33/383
Inventor 高小建潘俊铮张俊逸
Owner HARBIN INST OF TECH
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