Recently, high-performance and high-fluidity concrete have been studied and developed because high-rised build is constructed. high-performance and self-consolidating concrete is demanded high strength as low w/cm and fluidity as adding superplasticizer. However, these superplasticizer are changed early-age property such as bleeding, segregation and late setting time etc. This study persents the setting time of fluidity mortars evaluated using the measurement of eletrical resistivity. 7th Samples prepared mortars which were adding polycarboxylate type superplasticizer(Ester) or poly naphthalene sulfonate(PNS) and measured the electrical resisitivity during 24 h. As a results, mortars which added superplasticizers were late rising time which is setting time in measurement of electrical resistivity. However, degree of hardening of PNS mortar were higher than Ester mortar.

Abstract
 1. 서 론
 2. 샘플 제작 및 시험 방법
 3. 해석결과 및 고찰
 4. 결 론
 참고문헌

• 이한주(경북대학교 건설방재공학과) | Hanju, Lee
• 임홍재(경북대학교 건설방재공학과) | Hong Jae, Yim 교신저자