Title:
Path Dependent Biaxial Compressive Testing of an All-Lightweight Aggregate Concrete
Author(s):
Michael A. Taylor, Arun K. Jain, and Melvin R. Ramey
Publication:
Journal Proceedings
Volume:
69
Issue:
12
Appears on pages(s):
758-764
Keywords:
biaxial loads;compression;compressive strength;failure mechanisms;lightweight
aggregate concretes;lightweight aggregates;loads (forces);strains;stresses;test equipment;tests.
DOI:
10.14359/11282
Date:
12/1/1972
Abstract:
Using 2-in. cubical specimens, biaxial compression-compression envelopes were obtained for three strengths of 3/8 in. (10mm) MSA all-lightweight aggregate concrete: 2 ksi, 3.5 ksi, and 5 ksi (140, 245 and 350 kgf/cm^2). The desired stress state and the elimination of fricition were achieved by loading the specimens through wire bristle compression platens in a specially designed two-channel, closed-loop, electro-hydraulic testing facility. In contrast to a previous investigation, the shape of the failure envelo was found to differ from that for regular weight concrete. Furthurmore, an investigation of the influence of loading path showed that two-step sequential loadings result in strengths significantly lower than those obtained by proportional loadings.