Breakout Capacity of Headed Anchors with Delayed Installation

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Title: Breakout Capacity of Headed Anchors with Delayed Installation

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Publication: CIA

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Date: 2/28/2011

Abstract:
The objective of this research was to evaluate the impact on concrete breakout capacity of anchors in tension due to delay in the installation using the puddle-in technique. The puddle-in technique is the process of installing an insert (anchor) into fresh concrete once the surface has been finished. The installation was delayed by up to 160 minutes. Another installation method, pre-installation, is the attachment of the insert to the formwork or reinforcement before the concrete has been poured. The results discussed were obtained from research conducted at Curtin University of Technology, Perth as an undergraduate research project. Twenty four anchors were tested in tension. The principal test variables were anchor installation delay (and hence, loss of slump of the concrete) and concrete compressive strength at the time of anchor tension testing. The anchor type and edge distances were kept constant. The anchors all failed due to concrete cone breakout failure mode.


Concrete Institute of Australia, International Partner Access.

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