Novel slump and expansion degree measuring device and measuring method

Abstract

The invention discloses a novel slump and expansion degree measuring device and a measuring method. The device comprises a first expansion degree measuring box staff, two slump measuring rulers, two bases and a slump auxiliary rod. One ends of the two slump measuring rulers are connected with two bottom plates respectively, the other ends of the two slump measuring rulers are connected with the two ends of the first expansion degree measuring box staff respectively, the slump measuring rulers are vertical, and the first expansion degree measuring box staff is horizontal. The slump and the expansion degree can be accurately measured by the expansion degree measuring box staff and the slump measuring rulers; the slump and expansion degree measuring device is simple to operate, can independently complete measurement by one person, can realize accurate measurement for slurry with different slumps and expansion degrees, is wide in measurement range, is convenient to store and move due to atelescopic structure, and provides a new scheme for slump and expansion degree measurement.

Description

technical field [0001] The invention belongs to the technical field of concrete parameter measurement, and in particular relates to a novel slump and expansion measuring device and a measuring method. Background technique [0002] Slump refers to the workability of concrete, including the water retention, fluidity and cohesion of the mixture. Slump and expansion are used to measure the workability and judge whether the construction can proceed normally. important indicators. Factors affecting this index include water consumption per unit volume, water-cement ratio, sand rate, cement type, aggregate condition, time and temperature, and admixtures. Taking the slurry filled in the goaf in the mine as an example, if the slump is too large, the degree of expansion will increase accordingly, the fluidity of the slurry will increase, the cohesion and water retention will decrease, and the slurry will appear segregated and stratified. As a result, the strength of the filling body ...

AI Technical Summary

Problems solved by technology

Disadvantages: (1) The slump requires the assistance of others, and one person cannot operate alone; (2) The traditional slump measuring instrument can only measure concrete with a small slump, and it is difficult to measure the slurry with a slump of about 25. It cannot be measured accurately; (3) There is no instrument for the measurement of the expansion degree, which is basically estimated by formula or roughly measured, and the accuracy of the measurement result is not enough; (4) The measurement speed is slow, and the cycle to complete a matching slump measurement is long

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