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http://dx.doi.org/10.5389/KSAE.2020.62.2.031

Evaluation of Early-age Properties of Controlled Low Strength Material Using Non-destructive Testing  

Kim, Dong-Ju (School of Agricultural Civil & Bio-Industrial Engineering, Kyungpook National University)
Kim, Sang-Cheol (School of Agricultural Civil & Bio-Industrial Engineering, Kyungpook National University)
Han, WooJin (School of Civil, Environmental and Architectural Engineering, Korea University)
Lee, Jong-Sub (School of Civil, Environmental and Architectural Engineering, Korea University)
Byun, Yong-Hoon (School of Agricultural Civil & Bio-Industrial Engineering, Kyungpook National University)
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.62, no.2, 2020 , pp. 31-38 More about this Journal
Abstract
Controlled Low Strength Material (CLSM) has high fluidity and self-compaction characteristics. CLSM is mainly used for backfilling the excavated road. Early-age properties of CLSM should be characterized for fast restoration of the road. In this study, shear wave monitoring and Vicat needle test are performed to investigate the early-age properties of CLSM depending on the setting time. CLSM consists of CSA cement, fly ash, silt and sand, accelerator, and water. Five fly ashes with different chemical properties are used for CLSM samples. The penetration of CLSM along setting time is obtained through the Vicat needle test. A pair of bender elements are placed in a mold for shear wave measurement, and the change in shear waves with the setting time is monitored. The experimental results show that, regardless of the type of fly ash, the penetration depth decreases and the shear wave velocity increases with the setting time. Depending on the type of fly ash, initial and final times and shear wave velocity change. After testing, the correlation between penetration and shear wave velocity is obtained with high coefficient of determination. The shear wave measurement technique using the bender element can be used to identify early-age properties.
Keywords
CLSM; early-age property; penetration; shear wave;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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