In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

Masonry arch bridges use fill material ( typically compacted rubble ) above the arch in order to increase this dead-weight on the bridge .
Masonry arch bridges use a quantity of fill material ( typically compacted rubble ) above the arch in order to increase this dead-weight on the bridge and prevent tension from occurring in the arch ring as loads move across the bridge .