CS260020B1 - Method of non-homogenous building materials testing - Google Patents

Abstract

A process is provided enabling the compressive strength of non-homogeneous building materials, mainly concrete, and constructional elements made therefrom, to be non-destructively tested in the built-in state and at the manufacturing stage respectively. A current of hard particles of a size smaller than the largest grain of aggregate in the specimen is directed onto the specimen at a speed such that the kinetic energy of the particles is just sufficient to destroy that component of the over-all system which has the lowest individual strength and which is thus decisive for the compressive strength of the system as a whole. It is essential to the process that the current of particles acting on the specimen should move around the wear-resisting component and eject it after the cohesive combination has been re-separated. The compressive strength of the building material is determined from the change thus brought about in the geometry of the sample, taking into account the conditions under which the process has been carried out. The volume, depth or diameter of the crater produced in test cubes made of the building materials are used to provide calibration diagrams to enable the compressive strength of building materials to be determined.

Description

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PdatoMe

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Claims (4)

OBJECT OF THE INVENTION CLAIMS 1. A method of consolidating non-homogeneous building materials, predominantly concrete, and building components therefrom, characterized in that the solid matter stream of a particular energy acts on the test item, thereby breaking only the hardened cement slurry and eliminating filler grains from surface cohesion. 2. The process of claim 1 wherein the hardness of the solids used is not greater than the hardness of the filler used and the grain size of the solid particles used is less than the maximum grain size of the filler. 3. The method of claim 1, wherein the surface required for the test article is 5 times the maximum possible cross-sectional area by the maximum grain size. 4. Method according to claim 1, characterized in that the minimum removal depth is 10 mm. 260020