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소형석(So Hyoung-Seok),문경주(Mun Gyoung-Ju),소양섭(Soh Yang-Seob) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.2
Waste lime is place of business general waste that is happened by product fertilizer and chemical factory etc. This paper is to investigate the properties of cement composites containing high volume waste lime and fly ash to grope the practical use way of waste lime as the construction material. Therefore, consider CaO and CaCl₂ that much amounts were contained to waste lime in this research by main factor that influence in pozzolan reaction of fly ash and controlled mix. Experiment factors of this research was the ratio of waste lime and fly ash, the addition amount of cement and aggregate-binder ratio, water-binder ratio, curing temperature. In the results of test, the compressive strength of cement hardness is decreased according as increased the addition amount of waste lime, but the addition amount of waste lime appeared comparatively high by 200kgf/㎠(age 3day) and 343kgf/㎠(age 90day) to that is 40%. Much included Ca<SUP>2+</SUP> in waste lime are contributing in pozzolan reaction of fly ash. Also, It is found that pozzolan reaction of fly ash activated by much included CaCl₂ in waste lime.
포졸란재 함유 콘크리트의 투수 및 투기성과 염화물이온 투과성
소형석(So Hyoung-Seok),소양섭(Soh Yang-Seob) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.11
This study was carried out to evaluate the influence of addition of a pozzolanic admixtures(fly ash and silica fume, a blast furnace slag) on the concrete permeability. The main experimental variables were the water-cementitious material ratios, the types and amount of admixtures, and the curing time. And tests have been carried out on concrete containing pozzolanic admixtures to measure their permeability coefficient using water and oxygen, chloride ion, and compressive strength, and the porosity and pore size distributions by mercury intrusion porosimetry(MIP). The results show that the concrete containing pozzolanic admixtures exhibited lower permeability coefficient than the plain concrete. The significant reduction in permeability(water and oxygen, chloride ion) of concrete with pozzolans due to formation of a discontinuous macro-pore system which inhibits flow. It is shown that there is higher relationship between permeability and parameters of pore structure(such as porosity and pore size distribution), and permeability and compressive strength, and water or oxygen permeability and chloride ion permeability(charge passed) based on electrical conductance.