Impact of thermal transfer on hydration heat of a Soundless Chemical Demolition Agent
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|Title:||Impact of thermal transfer on hydration heat of a Soundless Chemical Demolition Agent||Authors:||Laefer, Debra F.
Natanzi, Atteyeh S.
Zolanvari, S. M. Iman
|Permanent link:||http://hdl.handle.net/10197/9711||Date:||30-Oct-2018||Online since:||2019-03-27T10:35:43Z||Abstract:||This paper explores thermal transfer effects in Soundless Chemical Demolition Agents (SCDA). In a 10°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 5°C greater hydration heat than in the water bath, which resulted in a six-fold expansive pressure difference after 4 days of testing and an order of magnitude more pressure in the first 24 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.||Funding Details:||Enterprise Ireland
Science Foundation Ireland
|Type of material:||Journal Article||Publisher:||Elsevier||Journal:||Construction and Building Materials||Volume:||187||Start page:||348||End page:||359||Copyright (published version):||2018 Elsevier||Keywords:||Soundless Chemical Demolition Agent; Expansive cement; Ambient temperature; Borehole diameter; Non-expansive demolition agent; Thermal transfer; Bristar; Heat of hydration; Volumetric expansion; Expansive pressure||DOI:||10.1016/j.conbuildmat.2018.07.168||Language:||en||Status of Item:||Peer reviewed|
|Appears in Collections:||Civil Engineering Research Collection|
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