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How do paver, steel-wheeled roller and pneumatic tire rollers carry out compaction?

Paver, steel-wheeled roller and pneumatic tire roller compact bituminous material by using the following principles:

(i) The static weight of the paving machines exerts loads on the bituminous material and compresses the material directly beneath the machine. The compacting effort increases with the period of contact
and larger machine weight.

(ii) Compaction is brought about by the generation of shear stress between the compressed bituminous material under the machine and the adjacent uncompressed bitumen.


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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Kanwarjot Singh

Kanwarjot Singh is the founder of Civil Engineering Portal, a leading civil engineering website which has been awarded as the best online publication by CIDC. He did his BE civil from Thapar University, Patiala and has been working on this website with his team of Civil Engineers.

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One comment on "How do paver, steel-wheeled roller and pneumatic tire rollers carry out compaction?"

Harun Chowdhury says:

Question: I understand asphalt thickness per layer should be 3 to 5 times of the aggregate size. For special cases, in case of a small job, if I exceed the laying thickness over 5 times – for example if I lay 80mm AC20 in one layer what are the consequences in terms of quality of work and compaction etc.

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