Quick-bonding pre-stress steel strand, and inducer and preparation method of the inducer

Abstract

The present invention provides a quick-bonding pre-stress steel strand, an inducer and a preparation method of the inducer. The quick-bonding pre-stress steel strand includes a steel strand (1) and a sheath (3) sleeving outside the strand (1); the space between the steel strand (1) and the sheath (3) is filled with a solidifiable liquid binding material layer (2); and an inducer (4) for accelerating the solidification of the binding material layer (2) is arranged outside the steel strand (1). The quick-bonding pre-stress steel strand has the function of fast solidification by external induction, can be used in large span pre-stress concrete beam, municipal highway bridge and railroad bridge in industrial and civil buildings, so as to realize unbonded state in the construction, bonded state usage, no influence of the outside and environmental factors and manual control of bonding rate.

Description

technical field [0001] The invention relates to a fast-bonding prestressed steel strand which can be used in large-span prestressed concrete beams in industrial and civil buildings, municipal highway bridges, and railway bridges, and can be quickly solidified by external induction, and also relates to an inducer , and further relates to a method for preparing an inducer. Background technique [0002] Slow bonded prestressing is a new prestressing technology developed by Japan in the 1980s on the basis of bonded prestress and non-bonded prestress. It was introduced into my country at the beginning of this century and became localized. The core of slow-bonded prestressing is the slow-bonding prestressed steel strand made of prestressed steel strand, retarding adhesive and plastic outer sheath through modern production technology and surface ribbing. The slow-setting adhesive has specific fluidity during the tensioning construction of the slow-bonded prestressed steel strand, ...

AI Technical Summary

Problems solved by technology

[0003] It can be seen from this that the realization of the excellent performance of retarded bonding prestress is mainly guaranteed by the characteristics of the retarded adhesive, so the stability of the retarded adhesive is very important, but in practical applications, the retarded adhesive The curing reaction of the mixture is greatly affected by factors such as the temperature and humidity of the external environment: when the ambient temperature and humidity are too high, it is easy to cause the slow-setting adhesive to solidify during the tensioning construction, resulting in insufficient tensioning or even Unable to stretch; when the temperature and humidity are too low, it is easy to cause the curing reaction of the retarding adhesive to slow down or even stop the reaction, so that the "occlusion effect" with the concrete cannot be formed within the set time, that is, it cannot be achieved Requirements for "bonded state" mechanical properties

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