Attachment A.pdf

This document is a technical specification section (Section 210) from a state transportation department's construction standards manual, specifically addressing Flowable Fill materials and construction requirements. The section provides detailed guidelines for using 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 technical specifications outline 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. The document specifies two types of flowable fill (excavatable and non-excavatable), mandates mix design review by the SME (Subject Matter Expert) at least 12 days before use, and provides strict guidelines for placement, including minimum cover depths, temperature restrictions, and placement techniques. The specifications also include requirements for compressive strength, with a minimum of 35 psi required at 16 hours for different set types, and detailed instructions for equipment, site preparation, and placement to ensure proper installation and performance.