Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6711345 | Construction and Building Materials | 2018 | 12 Pages |
Abstract
This paper explores thermal transfer effects in Soundless Chemical Demolition Agents (SCDA). In a 10â¯Â°C water bath, quadrupling the volume of SCDA in a pipe accelerated peak hydration onset and resulted in a 700% increase in expansive pressure and a 20% increase in volumetric expansion. An equivalent sample in a constant temperature chamber showed an almost 5â¯Â°C greater hydration heat than in the water bath, which resulted in a six-fold expansive pressure difference after 4â¯days of testing and an order of magnitude more pressure in the first 24â¯h, thereby demonstrating limitations of previous SCDA experimental work and providing a temperature-based reason for discrepancies between large-scale testing and manufacturers' predictions. Since most construction projects have scheduling requirements, understanding how to achieve sufficiently high pressures within a single work shift is important for evaluating the field viability of SCDAs on a particular project.
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Authors
Debra F. Laefer, Atteyeh S. Natanzi, S.M. Iman Zolanvari,