Seyoon Yoon

TL;DR: In this paper, an adiabatic thermal model of the 10 m 2 by 5.7 m Baianus Sinus breakwater from heat evolved through hydration of lime and formation of C-A-S-H suggests maximum temperatures of 85 to 97 °C.

TL;DR: In this paper, the microstructural characteristics of natural pozzolan-based geopolymers activated by a mixture of sodium hydroxide and sodium silicate have been investigated, and it is concluded that the pozzolins have sufficient strength as structural materials and matrices contain C-S-H like crystal as well as zeolites of hydroxysodalite and zeolite Y.

TL;DR: In this paper, the feasibility of using calcined layered double hydroxides (CLDHs) to prevent chloride-induced deterioration in reinforced concrete was investigated and shown that they not only adsorbed chloride ions in aqueous solution with a memory effect but also had a much higher binding capacity than the original layered double hydrides (LDHs) in the cement matrix.

TL;DR: In this article, the authors identified temperature ranges on the phases in actual cementitious systems (portland cement (OPC) pastes, blended pastes of ground granulated blast furnace slag (GGBFS) with OPC, and Ca(OH)2-activated GGBFS), by simultaneously using thermogravimetry (TG) and high-temperature X-ray diffraction (HT-XRD).

TL;DR: In this article, various synchrotron radiation laboratory based techniques used to characterize cement based materials in nanometer scale are reported. But the results of these studies are limited to a few specific applications, such as a study of 2,000 year old concrete using nanotomography, detection of localized and varying silicate chain depolymerization in Alsubstituted tobermorite, quantification of monosulfate distribution in tricalcium aluminate hydration using scanning transmission X-ray microscopy, detection and mapping of hydration products in high volume fly