Self-compacting concrete, which does not need to be vibrated to become fully compacted, has many advantages on a job site, such as lower overall costs, faster construction times, no need for a concrete vibrator, and thinner concrete sections.  One of the major disadvantages of this type of concrete, however, is that it’s notoriously poor in regards to fire resistance.  Traditional concrete solves the fire resistance problem by adding polypropylene (PP) fiber, which allow the concrete structure to stay intact when it comes in contact with fire.