Flexural Tensile Strength of Partially Grouted Concrete Masonry
Publication: Journal of Structural Engineering
Volume 118, Issue 12
Abstract
Partially grouted concrete masonry incorporates to some degree the beneficial properties of fully grouted concrete masonry at a reduced cost. It is also an economical and convenient means of improving the limited flexural tensile strength of hollow‐concrete masonry and, hence, a study of flexural tensile strength of partially grouted concrete masonry was considered opportune. Methodology and techniques of one‐third scale direct modeling were used in the study, for which the bond wrench test was used to determine the flexural tensile strength of wall assemblages. A total of 15 model walls were tested to determine the effect of grout spacing on flexural strength for bending normal to bed joints. Formulas were developed, empirically and analytically, for prediction of flexural tensile strength of partially grouted masonry. Test results indicate that flexural tensile strength improves significantly with reduced grout spacing, and that the apparent factor of safety of the ACI‐530/ASCE‐5 code of 1988 varies considerably for different extents of grouting.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Abboud, B. E. (1987). “The use of small scale direct models for concrete block masonry assemblages and slender reinforced walls under out‐of‐plane walls,” PhD thesis, Drexel University, Philadelphia, Pa.
2.
“ASTM C‐90: Standard specification for hollow load‐bearing concrete masonry units.” (1987). Annual Book of Standards, Vol. 4.05. ASTM, Philadelphia, Pa.
3.
“ASTM C‐144: Aggregate for masonry mortar.” (1987). Annual Book of Standards, Vol. 4.05. ASTM, Philadelphia, Pa.
4.
“ASTM C‐270: Standard specification for mortar unit masonry.” (1987). Annual Book of Standards, Vol. 4.05. ASTM, Philadelphia, Pa.
5.
“ASTM C‐476: standard specification for grout for masonry.” (1987). Annual Book of Standards, Vol. 4.05. ASTM, Philadelphia, Pa.
6.
“ASTM C‐1072: Measurement of masonry flexural bond strength.” (1987). Annual Book of Standards, Vol. 4.05. ASTM, Philadelphia, Pa.
7.
“Building code requirements for masonry structures.” (1988). ACI 530‐88 ASCE 5‐88, ASCE, New York, N.Y.
8.
Hamid, A. A., and Abboud, B. E., (1986). “Direct modelling of concrete masonry under shear and in‐plane tension.” J. Test. Eval. 14 (2), 112–121.
9.
Hamid, A. A., Abboud, B. E., Farah, M. W., Hatem, M. K., and Harris, H. G. (1989). “Response of Reinforced block masonry walls to out‐of‐place static loads.” Report No. 3.2(a); U.S.—Japan Coordinated Program for Masonry Building Res., Dept. Civ. and Architectural Engrg., Drexel Univ., Philadelphia, Pa.
10.
Hamid, A. A., Abboud, B. E., and Harris, H. G. (1985). “Direct modeling of concrete block masonry under axial compression,” masonry—research, application, and problems; ASTM STP 871, ASTM, Philadelphia, Pa., 151–166.
11.
Hamid, A. A., Assis, G. F., and Harris, H. G. (1988). “Material models for grouted block masonry.” Report No. 1.2(a)‐2; U.S.—Japan Coordinated Program for Masonry Building Res., Dept. Civ. and Architectural Engrg., Drexel Univ., Philadelphia, Pa.
12.
Hamid, A. A., and Drysdale, R. G. (1988). “Flexural tensile strength of concrete block masonry.” J. Struct. Engrg., 114(1), 50–66.
13.
Harris, H. G., and Becica, I. J. (1977). “Direct small scale modeling of concrete masonry.” Proc., Symp. on Advances in Civ. Engrg. Mech., EMD‐ASCE, (May), 101–104.
14.
Harris, H. G., and Becica, I. J. (1978). “Behavior of concrete masonry structures and joint details using small scale direct models.” Proc., North America Conf., Boulder, Col., (Aug.), 10.1–10.18.
15.
Hendry, A. W., and Murthy, C. K. (1965). “Comparative tests on one‐third and one‐sixth scale model brickwork piers and walls,” Proc., British Ceramic Society, London, England, 21–32.
16.
International conference of building officials, uniform building code, (1991). “Masonry codes and specifications, Chapter 24.” (1991). Whittier, Calif.
17.
Murthy, C. K., and Hendry, A. W. (1966). “Model experiments in load bearing brickwork.” Building Science, Vol. 1, Pergamon Press, London, England, 289–298.
18.
Sabnis, G. M., Harris, H. G., White, R. N., and Mirza, M. S. (1982). Structural modeling and experimental techniques. Prentice Hall, Inc., Englewood Cliffs, N.J.
19.
Sinha, B. P., Maurenbrecher, A. H. P., and Hendry, A. W. (1970). “Model and Full‐scale tests on a five‐story cross‐wall structures under lateral loading,” Proc., 2nd Int. Brick Masonry Conf., Stoke‐on‐Trent, England, 201–208.
20.
Vogt, H. (1956). “Consideration and investigations on the basic principle of model tests in brickwork and masonry structures.” (1956). Library Communications, No. 932, Building Research Station, Carston, Watford, England, 1–30.
Information & Authors
Information
Published In
Copyright
Copyright © 1992 ASCE.
History
Published online: Dec 1, 1992
Published in print: Dec 1992
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.