earticle

영어

In this paper, the results of setting and strength properties of concrete incorporating cement kiln dust, fly ash and blast furnace slag respectively are reported in order to reduce hydration heat of mass concrete and achieve economical advantage.
According to test results, setting time was not affected by CKD contents, whereas The use of FA with 10% and 20% retarded the setting time more than 2 hours. The increase of BS with 20 and 40% delayed setting time more than 1.5 hours. For compressive strength, the increase of CKD reduced the compressive strength. The use of CKD with 10% had little effect on strength gain. The use of FA and BS resulted in a reduction in compressive strength in proportion to the contents at early age.
At 28days, compressive strength with FA and BS exhibited a parabola curve with an increase in FA and BS contents. Higher strength gain was achieved in 10% of FA and 20% of BS at 28days. It can be seen that the use of mineral admixture in mass concreting considering placing layer can reduce hydration heat and economical advantage