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Çѱ¹°ÇÃà½Ã°øÇÐȸ / v.11, no.4, 2011³â, pp.345-352
¾ËÄ®¸® Ȱ¼º °í·Î½½·¡±× ¹ÌºÐ¸» ¸ð¸£ÅÍÀÇ ¾ËÄ®¸®-½Ç¸®Ä« ¹ÝÀÀ¿¡ °üÇÑ ½ÇÇèÀû ¿¬±¸
( An Experimental Study on Alkali-Silica Reaction of Alkali-Activated Ground Granulated Blast Furnace Slag Mortars )
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The purpose of this study was to investigate the expansion of alkali-activated mortar based on ground granulated blast furnace slag containing reactive aggregate due to alkali-silica reaction. In addition, this study was particularly concerned with the behavior of these alkaline materials in the presence of reactive aggregates. The experimental program included expansion measurement of the mortar bar specimens, as well as the determination of the morphology and composition of the alkali-silica reaction products by using scanning electron microscopy(SEM), and energy dispersive x-ray(EDX). The experiment showed that while alkali-activated ground granulated blast furnace slag mortars showed expansion due to the alkali-silica reaction, the expansion was 0.1% at Curing Day 14, showing that it is safe. After the accelerated test, SEM and BEM analysis showed the presence of alkali-silica gel and rim around the aggregate and cement paste. According to the EDX, the reaction products decreased markedly as alkali-activated ground granulated blast furnace slag was used. In addition, for the substitutive materials of mineral admixture, a further study on improving the quality of alkali-activated ground granulated blast furnace slag is needed to assure of the durability properties of concrete.
 
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¾ËÄ®¸®-½Ç¸®Ä« ¹ÝÀÀ;¹ÝÀÀ¼º °ñÀç;alkali-silica reaction;reactive aggregate;electron microscope;energy-dispersive X-ray spectroscopy;
 
Çѱ¹°ÇÃà½Ã°øÇÐȸÁö / v.11, no.4, 2011³â, pp.345-352
Çѱ¹°ÇÃà½Ã°øÇÐȸ
ISSN : 1598-2033
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201125153145896)
¾ð¾î : Çѱ¹¾î
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