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A method for testing the working performance of concrete and a device for implementing the method

A technology of work performance and test method, applied in the direction of material inspection products, etc., can solve the problems of error, inapplicability, inability to effectively distinguish differences, etc., to achieve the effect of reducing errors, wide range, and convenient and fast testing

Active Publication Date: 2014-10-22
TONGJI UNIV
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  • Claims
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Problems solved by technology

For high-viscosity concrete, the above-mentioned test methods and instruments are usually unable to effectively distinguish the difference, or even not applicable at all. In addition, it needs to comprehensively evaluate its workability through observation and experience, and the error caused by subjectivity is relatively large

Method used

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  • A method for testing the working performance of concrete and a device for implementing the method
  • A method for testing the working performance of concrete and a device for implementing the method
  • A method for testing the working performance of concrete and a device for implementing the method

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Embodiment 1

[0030] Such as Figure 1~4 Shown, a kind of test device of concrete working performance, this device comprises concrete slump tester 1, circular extension table top 2, cement mortar fluidity test jumping table 3, described concrete slump tester 1 is The existing ordinary concrete slump tester, before the slump cylinder is lifted and the vibration table is started, all operations are exactly the same as the concrete slump test process;

[0031] The circular extended table 2 is a cast steel table, its diameter can be set to 500-1200 mm, and its thickness can be set to 2-5 mm. In this embodiment, the circular extended table 2 has a diameter of 800 mm and a thickness of 3 mm. The upper surface of the extended table 2 is provided with seven concentric circular notches 4, wherein the diameter of the smallest circular notch is 200 mm, and a concentric circular notch is added for every 100 mm in diameter, and the circular extended table is extended from the center to There are eight ...

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Abstract

The invention relates to a testing method for working performance of concrete and an apparatus implementing the same. The testing apparatus comprises a concrete slump tester, a cement mortar fluidity testing jumping table and a circular extending table. In similar testing of the slump of concrete disposed on a large table-board, the jumping table vibrates preset times according to certain frequency and certain vibration amplitude after a slump cylinder is hoisted, which enables the slump and flowing of the concrete to be improved and the concrete to form a circular truncated cone shape with a larger area; the slump H after vibration, the mobile extended diameter D of the concrete, center thickness h1 and edge thickness h2 after vibration are measured, the inclination angle theta of a frustum after slump of the concrete is calculated through conversion, bleeding and the segregation degree of the concrete are observed, and thus, working performance of the concrete can be comprehensively estimated. Compared with the prior art, the invention has the following advantages: working performance of fresh concrete can be conveniently and quickly tested and distinguished, and the method and the apparatus are applicable to a wide variety of concrete.

Description

technical field [0001] The present invention relates to a kind of performance test of freshly mixed concrete which can be used in the field of civil engineering, especially relates to a kind of concrete work performance test device which is suitable for relevant concrete preparation, concrete supply and concrete construction units, as well as concrete experiment teaching in colleges and universities. Background technique [0002] As the performance of concrete in civil engineering develops towards high strength, the fluidity of fresh concrete added with new admixtures becomes quite different from that of ordinary concrete. The instrument can no longer meet the testing needs of high-performance concrete. It is manifested in two aspects. One is that high-performance concrete usually shows a strong dry consistency, and on the other hand, this type of concrete can show good fluidity under vibration, so as to ensure that it can achieve concrete through vibration. Dense, which in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/38
Inventor 李方元吴培峰沈殷
Owner TONGJI UNIV
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