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Durability of Building Sealants by Andreas T. Wolf

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EFFECTS OF EARLY MOVEMENT ON THE PERFORMANCE OF SEALED JOINTS

A test procedure

T.G.B.JONES, A.R.HUTCHINSON and K.E.ATKINSON

Joining Technology Research Centre, Oxford Brookes University, Oxford, UK

Abstract

The rates and amplitudes of movements from actual building joints were translated to a novel laboratory-based rig. This rig was used to cycle a variety of tensile adhesion joints made with and without backer rod. The key properties of “25% modulus” and “extension at peak load” were used as the mechanical performance indicators, whilst DMTA measurements were undertaken on bulk sealant samples to monitor the development of cure. In general the one-part sealant systems were affected far more by movement during cure than the two-part products. ...

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