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ASTM Selected Technical Papers
Masonry: Design and Construction, Problems and Repair
By
JM Melander
JM Melander
1
Portland Cement Association
,
symposium co-chairman and editor
.
Search for other works by this author on:
LR Lauersdorf
LR Lauersdorf
2
State of Wisconsin, symposium co-chairman and editor
.
Search for other works by this author on:
ISBN-10:
0-8031-1492-3
ISBN:
978-0-8031-1492-0
No. of Pages:
443
Publisher:
ASTM International
Publication date:
1993

ASTM Standard Specification for Mortar for Unit Masonry (ASTM C 270) requires mortar to be specified either by proportion specifications or property specifications. For portland cement-lime (PCL) mortars, it has been suggested that a significant difference exists between the properties of mortars mixed according to the proportion specifications and the requirements of the property specifications.

This paper presents data confirming that compressive strengths of PCL mortars according to current proportion limits do vary significantly from present property specification requirements. Alternative proportions that would bring the performance of cement-lime mortars more in line with the property specification requirements can be formulated based on the data.

The paper also investigates the relationship of portland cement content to flexural bond strength development of cement-lime mortars as obtained from tests conforming to UBC Standard 24-30. A mathematical model of the relationship is proposed and compared to additional experimental data.

1.
Hedstrom
,
E. G.
,
Tarhini
,
K. M.
,
Thomas
,
R. D.
,
Dubovoy
,
V. S.
,
Klingner
,
R. E.
,
Cook
,
R. A.
, “
Flexural Bond Strength of Concrete Masonry Prism Using Portland Cement and Hydrated Lime Mortars
,”
The Masonry Society Journal
 0741-1294. Vol
9
, No.
2
, February, 1991, pp. 8–23.
2.
UBC Standard 24-30 (Standard Test Method for Flexural Bond Strength of Mortar Cement)
, International Conference of Building Officials,
Whittier, CA
,
1991
.
3.
Benjamin
,
J. R.
, and
Cornell
,
C. A.
,
Probability Statistics, and Decision for Civil Engineers
,
McGraw-Hill Book Company
,
New York, NY
,
1970
.
4.
Ramberg
,
J. S
, “
Regression Analysis
”, Quality Control Handbook — Third Edition.
Juran
J. M.
, Editor-in-Chief,
McGraw-Hill Book Company
,
New York, NY
,
1979
, pp. 26-1 to 26-29.
5.
Juran
,
J. M.
, “
Appendix II — Tables and Charts
”, Quality Control Handbook — Third Edition,
Juran
J. M.
, Editor-in-Chief,
McGraw-Hill Book Company
,
New York, NY
,
1979
, pp. 1–48.
6.
Unpublished Compressive Strength Survey of Cement Produced in the U.S. Conducted by C01.27
”,
American Society for Testing and Materials
,
Philadelphia, PA
,
1991
.
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