Self-compacting concrete expansion time automatic test device

Abstract

The invention discloses an automatic self-compacting concrete expanding time testing device. The automatic self-compacting concrete expanding time testing device comprises a concrete slump cylinder comprising a round-table-type steel cylinder; the round-table-type steel cylinder is arranged on the middle part of a base plate; the center of the base plate is provided with a metal circle center; the base plate is provided with a plurality of concentric metal circular rings marked with different diameters around the metal circle center; the upper part of the round-table-type steel cylinder is provided with a handle, and the lower part of the round-table-type steel cylinder is provided with a pedal plate; the pedal plate is internally provided with a limit switch; the limit switch and the metal circular rings are respectively connected with an electronic testing device by leads. The automatic self-compacting concrete expanding time testing device can automatically test the time for the self-compacting concrete mixture expansion degree to reach the set diameter, is convenient to use, and is simple to operate, and has accurate and objective data.

Description

technical field [0001] The invention relates to a test device for the time when the expansion degree of self-compacting concrete mixture reaches a set diameter, in particular to an automatic test device for self-compacting concrete expansion time. Background technique [0002] Self-compacting concrete is a concrete with high fluidity, uniformity and stability, which can flow under its own weight and fill the formwork space without external vibration during pouring. In order to ensure that the self-compacting properties of self-compacting concrete mixtures meet the requirements of engineering applications, relevant specifications have specific requirements for the self-compacting performance indicators of concrete mixtures, among which the expansion time of self-compacting concrete is one of the important indicators of its self-compacting properties. For the test of the expansion time of self-compacting concrete, the concrete slump cylinder is currently used, and the hard bot...

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Problems solved by technology

[0003] In the prior art, using stopwatch and manual timing test methods, there is a problem that the slump cylinder is lifted and the timing is started, and the expanded concrete outer edge touches the circle with a diameter of 500mm on the bottom plate and the timing is stopped, which is difficult to synchronize, and timing errors are likely to occur. It is difficult to guarantee the accuracy and objectivity of the test results

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