Strength Development of Concrete subjected to Low-Temperature Condition Controled by an In-situ Temperature Monitoring System(ITMS)

When determining the level of curing, time of form removal and bringing in prestress on a concrete curing site, it is recommended that strength test be performed by using test piece that has been cured in the same way as the concrete on the site. However, in actual construction sites, the curing time is mostly decided for structural concrete according to the general rules suggested by concrete standard specification, instead of testing the test piece, for reasons such as easy application and lack of proper test equipment. In some cases, the structural concrete strength is evaluated based on the test piece cured on site next to the structural concrete. In this case, it can show much lower strength than the actual structural concrete, causing a longer construction period and higher costs. Therefore, this study reviewed the strength development properties by temperature tracking curing and compared them in terms of strength development properties of conventional curing methods such as sealing curing. For testing conditions, strength development properties were examined based on water cement ratio (W/C) in low temperature and temperature tracking. As a result, in temperature tracking curing, the strength development properties were significantly different from onsite sealing curing, and lower water cement ratio (W/C) indicated larger difference between onsite sealing curing and temperature tracking method.

온도추종 양생 장치를 이용한 저온환경 콘크리트의 강도발현 성상 검토