A constructed creature's quick and rebuild rules are the same.

Rebuild Rules: Type change type to construct, but do not change HD, base attack bonus, saves, or skills; Immune gains construct traits; Abilities null Constitution; SQ gains a construction bonus equal to the base creature's Con modifier. Construction (Ex): This construct uses its construction bonus in place of its Con modifier for all purposes. It does not gain the bonus hit points a creature of its size would otherwise gain for having construct traits.