Method and apparatus for measuring the strength of hardened conc

Details Method and apparatus for measuring the strength of hardened conc Method and apparatus for measuring the strength of hardened conc

1984-01-06

1985-09-03

Woodiel, Donald O.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

G01N 3338

Patent

active

045384673

ABSTRACT:
A method and apparatus for measuring the in situ strength of concrete containing aggregate particles of varying sizes in which a test member having at least one reacting surface is placed in the path of the concrete when the concrete is in the plastic state so that when the concrete is hardened, the test member is embedded therein. A force is then applied to the test member after the concrete has hardened tending to move the test member so as to cause the reacting surface to exert a compressive force on a portion of the hardened concrete of sufficient magnitude to create a rupture surface in the concrete. The large aggregate particles are screened out of the expected location in the concrete of the rupture surface so that large aggregate will not affect the test results.

REFERENCES:
patent: 3861201 (1975-01-01), Kaindl

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