Title:
Structural Evaluation of Concrete-Backed Stone Masonry
Author(s):
Mohamed A. H. AbdelL-Halim, Munawer R. Basoul, and Riyad A. Abdel-Karim, ACI Structural Journal
Publication:
Structural Journal
Volume:
86
Issue:
5
Appears on pages(s):
608-614
Keywords:
beams (supports); bond (concrete to stone); columns (supports); composite construction (concrete to masonry); concretes; eccentric loads; evaluation; failure mechanisms; infilled frames; masonry; prisms; rocks; tests; Structural Research
DOI:
10.14359/2854
Date:
9/1/1989
Abstract:
Experimental results of 15 test prisms, 6 beams, and 12 columns of concrete-backed stone masonry are reported. Six stone columns were infilled with plain concrete, and the other six stone columns were infilled with reinforced concrete. The prisms and the columns were tested under concentric and eccentric loads, and the beams were tested using two equal loads at the middle third of the beam. The traditional method of building used in some of the Middle East countries has been adopted to simulate the actual working conditions on site. Three kinds of stones were used: the first kind represents the very hard stones; the second represents the hard stones; and the third represents the soft stones. All the specimens were tested under increasing load until failure. Results indicate that the adhesion between the stones and the concrete is the weakest point in the concrete-backed stone masonry. The stresses in the concrete and stones at failure did not compare favorably with the compressive strength of the concrete or the stone units due to this weak bond between the concrete and stones. Transformed section technique can be used to study the behavior of concrete-backed stone masonry members until bond failure.