Attachment A.pdf

This document is a technical specification section (Section 210) from a state transportation department's standard specifications manual, specifically addressing Flowable Fill materials and construction requirements. The document provides detailed guidelines for the use of flowable fill as an alternative to compacted soil, with applications including beddings, encasements, closures for tanks and pipes, and general backfill for trenches and abutments.

The specification outlines comprehensive requirements for flowable fill materials, including composition (Portland cement, fly ash, fine aggregate, air entraining admixture, and water), mix design submission procedures, and construction methods. Key technical details include mix design review processes, material sourcing requirements (such as using SCDOT-qualified aggregate sources), strength specifications (minimum 35 psi compressive strength at 16 hours), placement techniques, and specific construction guidelines like protecting the fill from freezing, ensuring proper preparation and placement, and prohibiting vibrator use during placement. The document provides flexibility for different project needs by allowing both excavatable and non-excavatable flowable fill proportions and specifying options for Rapid Set (RS) and Normal Set (NS) mixes.