Auxiliary device and method used for measuring apparent density of concrete mixture

Abstract

The invention provides an auxiliary device used for measuring apparent density of a concrete mixture. The auxiliary device comprises a central annular vertical pressing plate with the inner diameter matched with the diameter of an apparent density bucket, a peripheral annular vertical baffle and an inclined circular plate connected between the central annular vertical pressing plate and the peripheral annular vertical baffle by outwards inclining for a certain angle, wherein support rods used for clamping the peripheral wall of the apparent density barrel are symmetrically hinged at the bottom of the inclined circular plate through springback devices, and a telescopic annular rubber ring is also arranged between the central annular vertical pressing plate and the contact surface of the apparent density bucket. The invention also provides a method used for measuring apparent density of the concrete mixture. The auxiliary device has the characteristics of being simple in structure and convenient to operate, waste caused by striking off excessive concrete mixtures and complicated steps due to clearing of the wall of the apparent density bucket are eliminated, and the accuracy of the final test results is guaranteed.

Description

Technical field [0001] The invention belongs to the field of concrete property testing experiments, in particular to an auxiliary device and method for measuring the apparent density of concrete mixtures. Background technique [0002] The apparent density test of concrete mixture is widely used as one of the basic performance testing experiments of ordinary concrete. At present, there are 5L containers that are used to determine the apparent density of concrete mixtures. According to the "Standard for Test Methods for Performance of Ordinary Concrete Mixtures" (GB 50080-2016), after adding concrete mixture to the container and vibrating to compact it, Scrape off the excess concrete mixture on the surface. However, during the leveling process, the excess concrete mixture will adhere to and remain on the outer surface of the container. If it is not cleaned up, it will affect the final weighed quality, which will greatly affect the accuracy of the apparent density results. Howeve...

AI Technical Summary

Problems solved by technology

However, in the process of scraping, excess concrete mixture will adhere to and remain on the outer surface of the container

If it is not cleaned, it will affect the final weighed quality, which will greatly affect the accuracy of the apparent density result

However, cleaning the concrete mixture on the outer surface of the container increases the loss of manpower and material resources, making the process of the apparent density test more complicated

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