Publications by authors named "Sungchul Yang"

Article Synopsis
  • This study investigates nuclear reactions involving zinc (Zn) and high-energy proton beams, specifically aiming to produce copper (Cu) and other isotopes like gallium (Ga).
  • It addresses the increasing global demand for Cu due to its favorable theranostic properties, and aims to enhance its production through improved nuclear data.
  • The researchers successfully extended the previously limited experimental data on Zn from a maximum of 70 MeV to a new range of 42 MeV to 98 MeV, validating their findings with existing literature and providing novel analytical methods for Cu production.
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The decrease in the quality of recycled aggregate due to an increase in the number of recycling is a primary factor that limits the multi-recycling of concrete. This degradation adversely affects concrete performance; thus, the characteristics of recycled aggregate should be considered during the mix design stage, but little research has taken that into account. This study investigates the effect of the equivalent mortar volume (EMV) mix design on some physical, mechanical and durability properties of concrete made of multiple recycled coarse aggregates at 50% and 100% replacement ratios compared to concrete made by the conventional mix design (CMD).

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In the present study, a recycled concrete aggregate (RCA) coating treatment using a cement paste dissociation agent (CPDA) with different mixing methods was newly incorporated in RCA concrete mixtures. First, a preliminary test program was conducted to determine the proper dosage of the CPDA solution throughout its RCA concrete test results from compressive strength, flexural strength, and elastic modulus. Then, a series of experimental tests were carried out to investigate the effect of RCA coating treatment, different mixing method such as the equivalent mortar volume (EMV) method and conventional method, and different RCA replacement ratios on durability test results of RCA concrete such as drying shrinkage values and rapid chloride penetration test (RCPT) values.

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