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What are the potential advantages in using lightweight aggregates in bridges?

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The advantages in using in using lightweight aggregates in bridges:

(i) Owing to reduced dead load by using lightweight aggregates, there are savings in structural material such as the cost of foundation and falsework.

(ii) It brings about environmental benefits when industrial waste products are used to manufacture lightweight aggregates.

(iii) It enhances higher durability by having lower coefficient of thermal expansion which reduces the thermal movement. Moreover, it has lower permeability and higher resistance to freeze-thaw cycles when compared with normal aggregates.

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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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