Durability Testing of Sealants
نویسنده
چکیده
The paper discusses the work carried out over the past decade within ISO TC59/SC8 and RILEM TC139-DBS committees towards the development of a durability test standard for sealants. In 2001, RILEM TC139-DBS published a RILEM Technical Recommendation (RTR) on a durability test method for curtain wall joint sealants. The paper discusses the development of this test method as well as results obtained in the evaluation of sealants. Results of initial evaluations indicate that the test method is able to differentiate between products with regard to their resistance to accelerated ageing and mechanical cycling. The type of failure and the changes in surface appearance observed during the test regime are similar to those observed in actual service conditions. Sealant degradation resulting from durability cycles without fatigue cycling was slower than had been anticipated for most sealant systems.
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