This document consists of four technical reference charts displaying grain size distribution curves for different concrete mixes. Each page presents a "Percent Coarse by Weight" versus "Percent Finer by Weight" graph, with multiple grain size curves plotted against standardized sieve analysis data. The charts include specifications for different concrete grades (labeled as ELEV-7-1, ELEV-7-4, ELEV-2-25, and ELEV-2-26) and reference materials such as sea-bred aggregate and various sieve sizes. Each graph displays both coarse and fine aggregate distribution patterns, with curves showing the relationship between particle size gradations. The left margins contain numerical scales for PM distribution grain size curves, while the bottom axes show percent finer by weight ranging from 0 to 100 percent, and the top axes indicate percent coarse by weight. These technical charts appear to be standard reference materials used in concrete mix design and quality control to verify that aggregates meet specified grading requirements for construction applications.
