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UNITED STATES DEPARTMENT OF AGRICULTURE 
BULLETIN No, 532 
Contribution from the Office of Public Roads and Rural Engineering 
LOGAN WALLER PAGE, Director 
Washington, D. C. 
PROFESSIONAL .PAPER 
October 13, 1917 
THE EXPANSION AND CONTRACTION 
OF CONCRETE AND CONCRETE 
ROADS 
By 
A. T. GOLDBECK, Engineer of Tests, and F. H. JACKSON, JR. 
Assistant Testing Engineer 
CONTENTS 
Page 
Laboratory Measurements of Expansion 
and Contraction 
Results of Expansion and Contraction 
Measurements 
Measuring the Contraction and Expansion 
of Concrete Roads 
12 
Page 
Results of Measurements at Chevy Chase, 
Md 15 
Expansion and Contraction of Ohio Post 
Road ............. 20 
Genera! Discussion 27 
Conclusions 30 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1917 
