OBERLIN, OHNatural Stone Institute is pleased to announce that accelerated weathering testing is now available through the testing lab’s recently acquired environmental simulation chamber. This test method is used to determine the level of strength and fabric degradation caused to a natural dimension stone by exposure to repeated cycles of freezing and thawing in a near saturated condition. Accelerated Weathering tests are often required by project design and engineering teams in regions that experience high numbers of freeze/thaw cycles.

The test method is applicable to any natural dimension stone intended to be used in construction or landscape applications in areas where the material will be subjected to subfreezing temperatures. Test specimens are placed in a chamber that alternates between cooling and heating to produce freeze/thaw cycling. Sonic modulus of elasticity tests are performed at prescribed intervals to establish a correlation between the number of cycles experienced and the rate of progression of degradation of the specimen. Destructive flexural strength testing is performed on control samples prior to the test and on samples after the test to determine strength loss.

The Accelerated Weathering test is one of nine tests available through the Natural Stone Institute. All testing is completed in the Natural Stone Institute’s state of the art testing lab in Oberlin, Ohio. Accelerated Weathering testing can be completed in one to three months and is available in cycles of 100, 150, 200 and 300.

The Natural Stone Institute testing lab is dedicated to providing outstanding personalized service, which includes assisting customers in identifying only the data they need. To learn more about the Accelerated Weathering test and other testing lab capabilities, visit www.naturalstoneinstitute.org/lab.