Charactetistics of Cement-Fly Ash Paste Containing High Early Strength Admixtures ;;;;;
Fly ash used as a cement replacement material increases the long term strength and also improves the durability of concrete and mortar. However, the use of fly ash is a little in spite of great benefit. In order to increase the consumption of fly ash, it has to be used as a cement replacement materials in the production of mortar and concrete, and the reduction of early strength development due to the use of fly ash also has to be diminished. In this study, many chemical compounds which accelerate the early strength was investigated. The , , Triethanolamine were selected and applied to the production of mortar. It was found that they enhance the early strength development of mortar(1, 3day) and decrease the amount of , and also increase the production of ettringite. According to the results of mercury instruction test, the pores ranged from 0.01 to 5 were decreased and it was also found in the analysis of X ray and SEM that fly ash increases the amount of ettringite at early ages.
fly ash;high early strength admixture;ettringite;porosity;
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증기양생이 플라이애쉬 콘크리트 강도발현에 미치는 영향, 1998.
Cement and Concerte Research, 1998.