Journal Published Online: 01 July 1982
Volume 4, Issue 1

A Strain Control System for Relaxation Studies of Concrete



This paper describes a system of automatic strain control devised to maintain constant strain in concrete specimens during stress relaxation tests. The system also makes provision for continuous monitoring of strain and stress as the testing proceeds. Evaluation of the system performance from the results of relaxation tests conducted using the system showed that the strain control achieved during these tests was remarkably effective. The maximum variation from initial strain recorded was 0.5 × 10−6 microstrain (0.5 × 10−6 in./in.)

Author Information

Pirtz, D
University of California, Berkeley, CA
Thomas, K
University of California, Berkeley, CA
Pages: 5
Price: $25.00
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Stock #: CCA10223J
ISSN: 0149-6123
DOI: 10.1520/CCA10223J