Various non-destructive test have been developed to predict the setting time of concrete. Through the electrical resistivity method(Wenner’s four electrode method), the effect of chemical admixture(AE admixture and superplasticizer) added for setting time of concrete mixtures is confirmed. As a result, it is observed that AE admixture dose not affect to change of concrete microstructure but delaying on setting time, and superplasticizer is affected not delaying on setting time, but changing in concrete’s microstructure

• 이한주(경북대학교 건설방재공학과, 석사과정) | Lee, Han Ju
• 임홍재(경북대학교, 건설방재공학부, 조교수) | Yim, Hong Jae