Testing device of concrete setting time

Abstract

The invention provides a testing device of concrete setting time, comprising a platform [18] of a testing table for positioning and placing a sample cylinder; a three-dimensional operation bracket [14] is arranged on the testing table, a penetration probe holding head [5] is installed on the bracket, a penetration probe [1] is placed on a reserve frame [2] of the testing table before / after use. A computer system controls the three-dimensional operation bracket so that the holding head practices the probe taking and placement in relative to the reserve frame and the penetration operation specific to the sample cylinder according to the penetration frequency and penetration point, and automatically controls and judges initial and final setting times. Compared with the prior art, the invention provides a completely automatic operated testing device of concrete setting time so as to guarantee the exact penetration speed, automatic sampling and recording of penetration force through a force sensor, and avoid influencing on accuracy of test data by the mistake; the testing device can automatically calculate and judge the testing result and process; particularly, the penetration probe can be automatically replaced; the testing device no needs for manual duty.

Description

Technical field [0001] The invention relates to a concrete setting time measuring device, also called a "penetration resistance meter", which is a test device for measuring the initial setting time and final setting time of concrete. Background technique [0002] The setting time of concrete refers to the time from the initial setting to the final setting of the concrete mixture. It is an index to measure the setting performance of concrete and is of great significance to the preparation and application of the concrete mixture. According to the National Standard of the People’s Republic of China "Standard for Test Methods for Performance of Ordinary Concrete Mixtures" (GB / T 50080), the so-called initial setting time refers to the time it takes for the concrete to mix with water until the penetration resistance of the mortar reaches 3.5MPa , Final setting time refers to the time it takes for the concrete to mix with water until the penetration resistance of the mortar reaches 28MP...

AI Technical Summary

Problems solved by technology

[0013] In view of the above-mentioned deficiencies, the technical problem to be solved by the present invention is to replace manual operation with computer technology, especially to change the connection mode between the measuring needle and the penetrating mechanism of the measuring needle, so as to provide a fully automatic operation of concrete setting time measurement controlled by computer device

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