Gamma ray measurement of pavement density and bridge research program (AASHO road test)
By: Presented at the thirty-seventh annual meeting, January 6-10, 1958
Series: Its Special report -- 38; National Research Council (U.S.). Publication -- 627; Publication (National Research Council (U.S.)) -- 627.; Special report (National Research Council (U.S.). Highway Research Board) -- 38.
Published: 1958
Place of publication: Washington
Language: eng
Number of pages: 43
Subjects: Pavements; Density; Gamma rays; Industrial applications; Bridges; Testing; Nuclear density gages
Description: Paper 1. The AASHO road test system of nuclear density determination is described, with emphasis on the source of error that has been isolated and in some cases eliminated. Some of the important considerations in the design of nuclear surface gages are discussed, as well as calibration techniques, licensing, health precautions, and cost. Paper 2. The AASHO road test includes 16 single-lane, single-span highway test bridges located in the regular traffic lanes of loops C and D, the heaviest traffic loops. With steel I-beam bridges, four designed to the yield point stress of the steel and four to 27,000 psi, are included, along with four conventional and four prestressed concrete bridges. This report summarizes the construction of the bridges, completed in 1957.
Notes: Includes bibliographical references (pages 12-15, 43).
Table of contents: title: Some refinements in measurement of surface density by gamma ray absorption / W.N. Carey, Jr., and John F. Reynolds; title: Bridge research at the AASHO road test / Ivan M. Viest.