Lightweight Shotcrete Canoe: Use of Viscosity Modifying Admixture and Acetone as Artificial Paste

摘要

This paper presents some of the most interesting steps followed by the Canadian team from Laval University in developing a high tensile strength, lightweight concrete for the construction of their canoe. This mixture was used in 2004 by the Laval University Concrete Canoe Team, which, year after year, participates in an engineering challenge. The objective is to develop a concrete mixture that can be pumped and shot on a male mold using a custom shotcrete technique. The 2004 mix contains acetone to enhance its fluidity and Welan gum to increase its viscosity, thus preventing segregation.