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ASTM Selected Technical Papers
Durability of Building and Construction Sealants and Adhesives: 2nd Volume
By
AT Wolf
AT Wolf
editor
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ISBN-10:
0-8031-3414-2
ISBN:
978-0-8031-3414-0
No. of Pages:
130
Publisher:
ASTM International
Publication date:
2006

Although construction sealants are used for all kinds of construction joints such as static joints with little movement, dynamic joints with thermal or seismically induced movement, and so on, the general test methods employed in the evaluation of the weatherability of construction joint are based on weathering test without movement. In November of 2000, AIJ (Architectural Institute of Japan) established a subcommittee chartered with developing an accelerated weathering test method, which enables the determination of the durability of waterproofing materials and sealants. In this activity, we evaluated the weatherability of sealants with a new test method using newly developed test specimens, which enable exposing the cured sealants to compression and extension at the same time in a single test specimen. In this paper, we report the interim test results, which cover twelve months of natural weathering and 3500 hours arti.cial weathering with xenon lamp and carbon flame weathering device. In this evaluation, we confirm that the surface degradation of sealants is accelerated by the additional movement cycles, and the differences in the degradation among the sealants are becoming observable.

1.
Tsurata
,
Y.
, “
Outdoor Exposure Test of Membrane and Sealant (part 9)—Deterioration of Sealant Exposed for Seven Years
,”
Architectural Institute of Japan
, Tokyo, Japan,
1990
, pp. 411–412.
2.
Miyauchi
,
H.
, “
Artificial Weathering And Cyclic Movement Test Results Based On Rilem 139-DBS Durability Test Method For Construction
,”
Durability Of Building And Construction Sealants And Adhesives
, ASTM STP 1453,
ASTM International
, Edited By
Wolf
A. T.
,
West Conshohocken, Pennsylvania
,
2004
, pp. 206–212.
3.
Anonymous,
ISO 4628-4 Paints and Varnishes — Evaluation of Degradation of Coatings - Designation of Quantity and Size of Defects, and of Intensity of Uniform Changes in Appearance. Part 4: Assessment of Degree of Cracking
,
International Standardization Organization
,
Geneva, Switzerland
,
2003
.
4.
Anonymous,
JIS (Japan Industry Standard) A 5758 — Sealants for sealing and glazing in buildings
,
Japan Industry Standard Organization
,
Tokyo, Japan
,
2004
.
5.
Anonymous,
ISO 4892 (Plastics-Methods of exposure to laboratory light source)
.
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