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ASTM Selected Technical Papers
Masonry
By
Brian E. Trimble
Brian E. Trimble
1
Brick Industry Association Symposium
,
Co-chairman and STP editor
Search for other works by this author on:
Joseph H. Brisch
Joseph H. Brisch
2
Rockwell Lime Company
,
Symposium Co-chairman and STP editor
Search for other works by this author on:
ISBN-10:
0-8031-3492-4
ISBN:
978-0-8031-3492-8
No. of Pages:
168
Publisher:
ASTM International
Publication date:
2008

A number of water repellents are added to masonry mixes and masonry units. To be classified as a water-repellent mortar admixture, ASTM C 1384 Specification for Admixtures for Masonry Mortars, requires that the 24-h rate of water absorption needs to be reduced by at least 50 % when compared to a control mortar without the admixture. While testing two well-known water-repellent admixtures, a substantial difference in activity was noted with the mortar that was being tested. Testing was expanded to include other water-repellent admixtures and several additional mortar formulae. This paper discusses the findings of that study.

1.
ASTM C 1384, “
Standard Specification for Admixtures for Masonry Mortar
,”
ASTM International
. For referenced ASTM standards, visit the ASTM website, www.astm.org. For Annual Book of ASTM Standards volume information, refer to the Standard's Document Summary page on the ASTM website.
2.
Thompson
,
M.
, “
Can Lime Be Replaced? Saying It Replaces Lime Doesn't Make it Lime
,”
Masonry Construction
, ISSN 0898-6088, Vol.
13
, No.
3
,
2000
, pp. 29–32.
3.
Meadowcroft
,
C. D.
, “
Can Lime be Replaced? Lime Alternates Are Not And Do Not Want To Be Lime!
,”
Masonry Construction
, ISSN 0898-6088, Vol.
13
, No.
3
,
2000
, pp. 29–33.
4.
Nordmeyer
,
D. H.
, “
High Pozzolan Mortars and Stuccos
,”
Masonry: Opportunities for the 21st Century
, ASTM STP 1432,
Throop
D.
and
Klingner
R. E.
, Eds.,
ASTM International
,
West Conshohocken, PA
,
2003
.
5.
Helmuth
,
R.
,
Fly Ash in Cement and Concrete
,
Portland Cement Association
,
1987
, pp. 117–120.
6.
Ramachandran
,
V. S.
, Ed.,
Concrete Admixtures Handbook, Properties, Science, and Technology
, Second Edition,
Noyes Publications
,
Mill Road, Park Ridge, NJ
,
1995
, pp. 985–994.
7.
ASTM C 270, “
Standard Specification for Mortar for Unit Masonry
,” Annual Book of ASTM Standards,
ASTM International
, West Conshohocken, PA.
8.
ASTM C 788, “
Standard Specification for Standard Sand
,” Annual Book of ASTM Standards,
ASTM International
, West Conshohocken, PA.
9.
ASTM C 91, “
Standard Specification for Masonry Cement
,” Annual Book of ASTM Standards,
ASTM International
, West Conshohocken, PA.
10.
ASTM C 144, “
Standard Specification for Aggregate for Masonry Mortar
,” Annual Book of ASTM Standards,
ASTM International
, West Conshohocken, PA.
11.
ASTM C 1403, “
Standard Test Method for Rate of Water Absorption of Masonry Mortars
,” Annual Book of ASTM Standards,
ASTM International
, West Conshohocken, PA.
12.
Lea
,
F. M.
,
The Chemistry of Cement and Concrete
,
Chemical Publishing Company, Inc.
, 3rd ed.,
1971
, pp. 391–392.
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