Method of testing homogeneity of steel-fiber-reinforced concrete on ready made reinforced fiber concrete structures

摘要

in a series of hard zkusebnu00edch dru00e1tkobetonovu00fdch sample (1) of different known concentrations of wire, with the expected dispersed wires, creates kalibracnu00ed bore (2) of prumeru in the range of 20 mm to 30 mm, which introduces a magnetic probe.in a gradual, continuous extraction of odecu00edtu00e1 magnetic field strength, cu00edmz is obtained kalibracnu00ed table dependent magnetic field intensity on the concentration of wire.after the zkousenu00e9 dru00e1tkobetonovu00e9 structure (3) places maximum stress structure, and in the places that are the limit condition pouzitelnosti structure creates at least three vu00fdvrty (7, 8, 9) of the prumeru conforming to prumerem kalibracnu00edho drill hole (2). the distance (c) lu00edcu drill hole (7, 8, 9) is equal to or more than 2 x l.sub.f.n.a smaller l.sub.f.n. where l.sub.f.n.je length pouzitu00fdch wire.the corkscrew (7, 8, 9) are gradually introduced magnetic probe and by its continuous extension to odecu00edtu00e1 magnetic field strength along the depth of the drill hole (7, 8, 9). from the recorded values of the magnetic field is dru00e1tkobetonu in such places as homogeneity, so comparing with the kalibracnu00ed table, the concentration of wire vyju00e1drenu00e1 kg / m.sup.3.n.or in a volume percentage of ztuzenu00ed fibres in the ztvrdlu00e9m dru00e1tkobetonu in finished dru00e1tkobetonovu00e9 construction.