Showing papers by "Jin-Keun Kim published in 2004"
TL;DR: In this paper, the effects of cement type, curing temperature, and age on the relationship between dynamic and static elastic moduli or compressive strength were investigated, and new relationship equations were proposed.
84 citations
TL;DR: In this paper, a wedge-splitting test for Mode I was performed on cubical specimens with an initial notch at the edge and the results from the test and analysis indicate that critical crack tip opening displacement decreases and critical stress intensity factor and fracture energy increase with concrete ages from Day 1 to Day 28.
61 citations
TL;DR: In this paper, the authors analyzed the permeability of chloride ions and the corrosion performance in the concrete blended with granulated blast furnace slag exposed to a chloride environment, and the results of the accelerated corrosion tests showed that the concrete with sulfate resisting cement shows good to corrosion resistance, however, the concrete mixed with sulfates resistant cement shows bad to corrosion resilience.
Abstract: This paper represents the permeability of chloride ions and the corrosion performance in the concrete blended with granulate blast furnace slag exposed to chloride environment An ordinary cement (type I ) and sulfate resisting cement(type V) were used for the experiment The two cements were combined with , , , and of the granulated blast furnace slag The accelerated permeability tests of chloride ions were performed in accordance with ASTM C1202, and the accelerated corrosion tests of steel were carried out by using the method of immersion/drying cycles After water curing 28 days, 56 days and 91 days, these tests were conducted until 30 cycles In every cycle, test specimens were wetted in NaCl solution for three days and dried again in air for four days As an experimental results, the diffusion coefficient of chloride ions of the ordinary cement Concrete Combined granulated blast furnace slag was much lower than that of non granulated blast furnace slag concrete Moreover, the diffusion coefficient of chloride ions of sulfate resisting cement concrete was higher than that of ordinary cement concrete On the basis of the results of accelerated corrosion tests, corrosion resistance of the concrete mixed with granulated blast furnace slag shows good to corrosion resistance, however, the concrete with sulfate resisting cement shows bad to corrosion resistance
5 citations