To check the serviceability of K-UHPC structures, we need the guideline for the allowed crack width in various environment. To setup the guideline, direct tensile test of reinforced K-UHPC tensile members was implemented. The test results show very small crack width, and the allowed values for the ordinary concrete can be used for K-UHPC structures.

• 곽임종(한국건설기술연구원 수석연구원, 공학박사) | Kwahk, Im Jong
• 조창빈(한국건설기술연구원 연구위원, 공학박사) | Joh, Chang Bin