Investigation of expansive concrete structures through strain monitoring in field structures

Myint, Su Hlaing; Tanapornraweekit, Ganchai; Tangtermsirikul, Somnuk

doi:10.1007/s42107-020-00332-1

Cited by 5 publications

(1 citation statement)

References 27 publications

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“…This phenomenon can be ascribed to two primary factors: Firstly, due to the superior grade of concrete in the expansive strengthening band, the quantity of heat engendered by hydration is elevated (Wang et al, 2022), which significantly escalates the temperature in this region, leading to a higher degree of thermal expansion. Secondly, the MgO expander induces the concrete in the expansive strengthening band to expand (Tian et al, 2022), which is restrained by the adjacent standard region concrete, resulting in compressive strain (Myint et al, 2021).…”

Section: Principle Of Strain Distributionmentioning

confidence: 99%

Investigation into the seamless construction for hundred-meter scale super-length raft structure based on magnesia expansive agent concrete

Han,

Wang,

Liao

et al. 2024

Front. Mater.

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This research introduces an innovative construction method based on magnesia expansive agent concrete for the seamless construction of hundred-meter scale super-length raft structures, corroborated by the on-site test. The basic principle of this construction method is to use the pre compression stress generated by magnesia expansive agent to offset temperature and shrinkage stress. A temperature-strain monitoring system was employed to gather data, affirming the technique’s applicability and safety. Through the examination of temperature and strain dispersion trends in super-length raft structure, recommendations for the configuration of temperature-strain sensors have been put forth. Through the scrutiny of the temporal evolution pattern of temperature, the specific temporal and spatial coordinates that warrant particular vigilance during the surveillance of the raft’s inner-surface temperature difference were identified. Upon evaluating the correlation between strain dispersion and strain-temperature differential in the raft’s thickness dimension, a novel temperature control index (the bottom-surface temperature difference) was introduced. The threshold for this metric was established at 30°C, derived from empirical test outcomes conducted on-site. Furthermore, the critical regions for monitoring the bottom-surface temperature difference were specified.

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Section: Principle Of Strain Distributionmentioning

confidence: 99%