Post Installed REBAR

Dear Vivek,

Thanks for your question.

Over the past two decades, extensive investigations have been conducted to evaluate post-installed reinforcing bar connections subjected to a variety of loading conditions. Much of this work has been conducted at leading research institutions in Europe and the U.S. as well at Hilti’s own research laboratories. The tests have consistently shown that post-installed reinforcing bars installed with qualified systems exhibit performance that is at least equivalent to cast-in reinforcing bars under similar conditions, even if the basic load transfer is not identical.

In 2006, the European Organization for Technical Approvals issued the technical report TR023 Assessment of Post-installed Reinforcing Bar Connections [1]. This document provides guidance for verifying that post-installed reinforcing bar connections built with a specific mortar system will exhibit comparable behavior to cast-in-place reinforcing bar connections in terms of load, and displacement behavior under several environmental conditions. Among other tests also sustained loading test (creep tests) are performed consequently the Design method for post-installed rebar connections assessed per TR023 shall be designed as straight cast-in-place rebar according to Eurocode2 using the values of the design bond resistance fad for deformed bars as given in the relevant approval taking account of additional amendments. Consequently, the same long term behavior compared to a cast-in rebar can be at least expected.

[1] EOTA (2006): Assessment of post installed reinforcing bar, Technical Report

Hope the answer to your question.

Regards
Usman