A Study on Evaluation of High Early Strength Concrete as Pavement Overlay Materials for Early Traffic Opening(2)

신속개방형 콘크리트 도로포장재의 설계를 위한 평가 연구(2)

  • 엄태선 (쌍용양회공업(주) 기술연구소) ;
  • 임채용 (쌍용양회공업(주) 기술연구소) ;
  • 유재상 (쌍용양회공업(주) 기술연구소) ;
  • 이종열 (쌍용양회공업(주) 기술연구소) ;
  • 엄주용 (중앙대학교 토목공학과) ;
  • 조윤호 (도로공사연구소 책임연구원)
  • Published : 2001.11.01

Abstract

In road Pavements, it is known that cement concrete pavement has superior durability, safety compared with asphalt pavement. But in repairing pavement, cement concrete pavement is not usually applied because of the length of time while the road is interrupted when using Ordinary and Rapid-hardening Portland Cement. And Super High Early Strength Cement and Ultra Super High Early Strength Cement are not favorable for ready mixed concrete because of rapid setting time, high slump loss and other restrictions. We aim to develope special cement and concrete developing 1 day strength of over 300 kg/$\textrm{cm}^2$ to open the road within one day and workable time is maintained over 1 hour that can be used as ready mixed concrete. In this study, we produced cement using rapid-hardening cement, Hauyne clinker, anhydride gypsum and accelerator and studied on its properties. The comperssive strength was over 400 kg/$\textrm{cm}^2$ and tensile at 1 day and workable time was maintained for over 1 hour.

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