A system for forming a concrete structure, comprising: a first concrete element, the first concrete element having a first duct segment positioned therein and extending from an end of the first concrete element; a form positioned adjacent to the end of the first concrete element; a second duct segment positioned within the form; a female duct coupler, the female duct coupler coupled to the first or second duct segment, the female duct coupler including a female duct coupler body having an inner surface having an inner diameter; and a male duct coupler including a male duct coupler body having an outer surface having an outer diameter, the outer diameter being smaller than the inner diameter of the inner surface of the female duct coupler body, wherein the male duct coupler is coupled to the other of the first or second duct segments and characterized in that: the female duct coupler has a bayonet slot; the male duct coupler has a bayonet post extending from an outer surface of the male duct coupler body, and wherein the male duct coupler is also coupled to the female duct coupler, wherein a portion of the male duct coupler body is positioned within the female duct coupler body and the bayonet post is positioned within the bayonet slot, and wherein the second duct segment is rotated relative to the first duct segment to retain the bayonet post in the bayonet slot thereby coupling the first and second duct segments; and the system further comprises concrete in the form and forming a second concrete element having the male and female duct couplers and at least a portion of the second duct section embedded therein. a first concrete element, the first concrete element having a first duct segment positioned therein and extending from an end of the first concrete element; a form positioned adjacent to the end of the first concrete element; a second duct segment positioned within the form; a female duct coupler, the female duct coupler coupled to the first or second duct segment, the female duct coupler including a female duct coupler body having an inner surface having an inner diameter; and a male duct coupler including a male duct coupler body having an outer surface having an outer diameter, the outer diameter being smaller than the inner diameter of the inner surface of the female duct coupler body, wherein the male duct coupler is coupled to the other of the first or second duct segments and characterized in that: the female duct coupler has a bayonet slot; the male duct coupler has a bayonet post extending from an outer surface of the male duct coupler body, and wherein the male duct coupler is also coupled to the female duct coupler, wherein a portion of the male duct coupler body is positioned within the female duct coupler body and the bayonet post is positioned within the bayonet slot, and wherein the second duct segment is rotated relative to the first duct segment to retain the bayonet post in the bayonet slot thereby coupling the first and second duct segments; and the system further comprises concrete in the form and forming a second concrete element having the male and female duct couplers and at least a portion of the second duct section embedded therein. the female duct coupler has a bayonet slot; the male duct coupler has a bayonet post extending from an outer surface of the male duct coupler body, and wherein the male duct coupler is also coupled to the female duct coupler, wherein a portion of the male duct coupler body is positioned within the female duct coupler body and the bayonet post is positioned within the bayonet slot, and wherein the second duct segment is rotated relative to the first duct segment to retain the bayonet post in the bayonet slot thereby coupling the first and second duct segments; and the system further comprises concrete in the form and forming a second concrete element having the male and female duct couplers and at least a portion of the second duct section embedded therein.