Shotcreting a Bobsleigh/luge Track for the Winter Olympic Games in Nagano
By K.Yamamoto, T.Ishihara, N.Takeda and K.abe
Concrete Journal, Vol.34, No.4, April 1996
- Synopsis
- The bobsleigh/luge track for the Winter Olympic Games in Nagano is the first artificially frozen course of reinforced concrete construction in Japan. Shotcrete was applied to this course, as placing in forms was impracticable within the limitations ofcost and construction period, due to its complicated sectional shapes that change three-dimensionally along the course. The concrete was required to have adequate filling capa-bility into spaces between reinforcing bars and cooling pipes, adhesion to vertical walls,and resistance to freezing and thawing of the track surfaces. A shotcrete with excellentplacability and durability was produced by the use of a viscosity agent and an air-entraining and high-range water-reducing agent, as well as adequate proportioning of thematerials. This paper reports on the materials and mix proportions of the shotcrete applied to the track. The application method is introduced as well.
- Keywords�F
- shotcrete, bobsleigh/luge, filling capability, adhesion, reinforced concrete,Winter Olympic Games in Nagano
