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
CN102778556BActive Publication Date: 2014-10-22TONGJI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TONGJI UNIV
Publication Date
2014-10-22

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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.
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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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