Amendment 0004_1988_71 gsds.pdf

This document is a technical specification sheet containing five grain size distribution curves used for quality control and acceptance testing of aggregates. Each page presents a separate gradation curve with corresponding sieve analysis data plotted on a semi-logarithmic grid.

The charts display percent coarse by weight on the vertical axis and percent finer by weight on the horizontal axis. Each curve represents a specific aggregate specification with defined upper and lower control limits. The specifications shown include Standard Sea Bight, Area Sea Bight, Bone No. 7 Range 88-77, Eureka 6, and Eureka-22/25 designations, each with corresponding effective dates. The curves illustrate acceptable particle size distributions for concrete aggregates, allowing contractors to verify that material samples comply with contractual requirements through sieve analysis results. This type of specification document would typically be referenced in construction contracts, particularly those involving concrete work for federal projects, to ensure consistent material quality and performance.