In food processor bowl with metal blade or blender container, combine strawberries, sugar and limeade concentrate; process until strawberries are chopped and mixture is blended. Slowly add 1/2 to 1 cup of the water, blending well.
Pour into nonmetal freezer container. Add remaining 1/2 to 1 cup water, tequila and 1 1/2 cups of the carbonated beverage; mix well. Cover container; freeze 4 to 5 hours or until icy, stirring 2 or 3 times after 2 hours.
To serve, stir mixture; spoon into 10 glasses. Top each serving with 1/4 cup carbonated beverage.