과제정보
본 연구는 한국연구재단(과제번호: NRF-2019R1I1A3A01062396)의 일환으로 수행된 연구임을 밝히며 이에 감사를 드립니다.
The purpose of this study is to explore the possibility of estimating optimum surface finish time of the fresh concrete placed at the job site by applying a surface hardness test meter(Durometer). Tests are carried out by measuring and comparing the Penetration resistance test and hardness test by Durometer. Penetration resistance tester and improved Durometer are similar, but the higher the temperature, the higher the setting time, and the higher the correlation was shown. When the hardness value of the improved Durometer is about 50 HD, it is found that the initial and 80 HD represent the end. It is expected that this will be useful in determining the finish time of the surface at the actual site.
본 연구는 한국연구재단(과제번호: NRF-2019R1I1A3A01062396)의 일환으로 수행된 연구임을 밝히며 이에 감사를 드립니다.