Korea Advanced Institute of Science and Technology · Engineering
Professor Jae Hong Kim's research lab specializes in cementitious materials and concrete technology, with a strong focus on rheology, durability, and sustainable concrete solutions. The lab investigates the flow behavior and formwork pressure of self-consolidating concrete, the role of mineral admixtures in reducing lateral pressure, and the impact of CO₂ curing on strength development and carbonation. Key research directions include optimizing concrete mix designs for improved workability and formwork performance, advancing rheological measurement techniques, and exploring carbon utilization through CO₂ curing to reduce environmental impact. The lab also contributes to the development of predictive models for concrete pumping and the evaluation of lubricating layers in pipeline flow.
Figures are computed from collected data and may differ slightly.
Owing to enhanced filling ability, self-consolidating concrete offers accelerated casting and superior quality control during construction. However, its high fluidity and high placement rate increase the lateral pressure on the formwork, necessitating an extensive supporting system to retain fresh mixtures in a desired shape. Current recommendations of formwork design for self-consolidating concrete adopt the concept of hydrostatic pressure, even though the measured pressure could be less than t
Large scale constructions needs to estimate a possibility for pumping concrete. In this paper, the state of the art on prediction of concrete pumping including analytical and experimental works is presented. The existing methods to measure the rheological properties of slip layer (or called lubricating layer) are first introduced. Second, based on the rheological properties of slip layer and parent concrete, models to predict concrete pumping (flow rate, pumping pressure, and pumpable distance)
Self-consolidating concrete (SCC) is a recently developed, innovative construction material. With use of SCC no additional compacting is necessary due to its high filling ability; as a result, the labor cost of compacting is economical. However, SCC may require stronger formwork that can resist the higher lateral pressure induced as compared to that for ordinary concrete. This study shows the effects of limestone filler or fly ash replacement on the formwork pressure and workability retention of
Various factors influence the rheology of cementitious pastes, with the most important being the mixing protocol, mixture proportions, and mixture composition. This study investigated the influence of ground-granulated blast-furnace slag, on the rheological behavior of cementitious pastes. In tandem with the rheological measurements, fresh state microstructural measurements were conducted using three different techniques: A coupled stroboscope-rheometer, a coupled laser backscattering-rheometer,
Curing by CO<sub>2</sub> is a way to utilize CO<sub>2</sub> to reduce greenhouse gas emissions. Placing early-age cement paste in a CO<sub>2</sub> chamber or pressure vessel accelerates its strength development. Cement carbonation is attributed to the quickened strength development, and CO<sub>2</sub> uptake can be quantitatively evaluated by measuring CO<sub>2</sub> gas pressure loss in the pressure vessel. A decrease in CO<sub>2</sub> gas pressure is observed with all cement pastes and mortar
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