• 한국지반공학회:학술대회논문집
• /
• 한국지반공학회 1995년도 가을 학술발표회 논문집
• /
• pp.201-210
• /
• 1995

In Resent years, urban tunnels have been more deeply constructed due to the congestion of buried steuctures. In such conditions, the shield method has become one of the popular urban tunnelling method by reason of several characteristics ; safety of construction, mimium environmental damage, and workbility. In tunnelling, the space which is tail-void are created between the ground and the other face of the primary lining. in other to reduce the ground seformation, it is important backfilling in tail-void. In this paper, the result of an experimental investigation undertaken to evaluate the physical and mechanical propeties of grouts composed of various mixtures of backfill materials. And the backfill injection model test was carried out considering the effects of tail-void.

• 한국항만학회지
• /
• 제9권1호
• /
• pp.65-72
• /
• 1995

This study is being done for the purpose to achieve a stable demand and supply of materials for long term. The author investigated condition of suitable mixer design method for concrete, an individual value and a character of dynamics as a supplement material by drying up the natural aggregate, and a possible practicalization plan to reduce defects to the minimum. As a result of this study, it can be acquired a good quality of concrete by the use of the natural sand (Nak Dong river sand) and the crushed sand with suitable mixing ratio. The fineness modulus (F.M) of mixing aggregate is $2.7\pm1$ at this time and this is good for workbility and plasticity of concrete.

• 대한환경공학회지
• /
• 제35권1호
• /
• pp.64-69
• /
• 2013

이 연구논문의 주요 목적은 하수슬러지와 생활폐기물을 혼합소각할 경우, 소각시설의 안정적 운영을 위해 가장 중요한 변수인 하수슬러지의 정량공급 방안에 관한 것이다. 실험결과, 슬럼프테스트와 유동화테스를 통해 함수율을 약 87%로 정량공급할 경우, 하수슬러지의 표면연소를 보완하여 완전연소가 이루어 질 것으로 판단되어 향후 생활폐기물과 하수슬러지 혼합소각시 소각시설의 안정화에 기여할 것으로 판단된다.