Mini air meter for fresh concrete

Measuring and testing – Gas content of a liquid or a solid – By vibration

Patent

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Details

73 61R, G01N 716

Patent

active

048669776

ABSTRACT:
A volumetric test apparatus for entrained air contents of regular and lightweight fresh concrete comprises an outer container, an inner bowl, an upper tapered top section detachably securable to the outer container and a cover and rod for the top section. The concrete sample is placed in the bowl and rodded with the rod to eliminate any large entrapped air voids. The bowl is then placed in the outer container which is then filled with water and the top section is sealably locked in place upon the outer container and is also filled with water whereupon a cap is screw threadably engaged upon the cover. After manual agitation, the cap is removed allowing previously entrained air to escape and the top and container is then topped up with alcohol which is measured as it is poured into the apparatus. The volume of the entrained air may then be calculated readily and easily.

REFERENCES:
patent: 2635459 (1953-04-01), Gray
patent: 2668437 (1954-02-01), Patch
patent: 2722825 (1955-11-01), Meyer
patent: 2823540 (1958-02-01), Patch
patent: 2892343 (1959-06-01), Chace
patent: 4344316 (1982-08-01), Nasser

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