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The shape of joint sealant affects its ability to stretch with movement. For instance, for rectangular joint sealant if the depth exceeds the width it tends to resist stretching of sealant in thermal movement. Moreover, block shape, when compared with concave shape, appears to be more resistant to stretching.
This question is taken from book named – A Self Learning Manual – Mastering Different Fields of Civil Engineering Works (VC-Q-A-Method) by Vincent T. H. CHU.
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