Red River Waterway Thermal Studies. Report 1. Concrete Mixture Selection and Characterization.

摘要

This report includes the selection and characterization of the concrete materials in support of thermal- and incremental-construction analyses. The primary objective was to develop and evaluate materials and construction methods which would yield safe, serviceable structures with lower life-cycle costs. Materials (Type II portland cement, Class C fly ash, and aggregates) were selected based upon materials likely to be used to develop 15 trial concrete mixtures. Ratios of Class C fly ash to total cementitious materials from 0.25 to 0.60 were studied. Water cement ratios were varied from 0.45 to 0.65. These mixtures were evaluated based upon strength requirements, economy, and thermal considerations. From the 15 mixtures, 4 candidate mixtures were selected for complete thermal and mechanical properties characterization. Tests included thermal properties, adiabatic temperature rise, creep, elastic modulus, shrinkage, and compressive strength. Keywords: Concrete mixtures; Dams/locks waterways; Construction materials; Construction/cement; Strength mechanics; Stress strain mechanics; Thermal stresses/properties; Fly ash. (mm)