741360480

Technical summary.

Kansas. Dept. of Transportation

NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures ; NTL-HIGHWAY/ROAD TRANSPORTATION-Materials ;

PDF

The majority of the bridges in Kansas are in rural areas. Many of these are

becoming structurally deficient, and are in need of replacement. Due to the location of

these bridges, cost of transporting prestressed girders to these areas often makes use of

cast-in-place bridges more economical. Use of lightweight aggregate in these bridge

girders would reduce the total weight and could allow multiple girders to be shipped on

one semi-truck. This would reduce transportation costs and allow the more economical

prestressed girders to be used in rural areas. Lightweight prestressed girders could be

put in place using a lower capacity crane due to the lower self-weight of the beam. The

construction process would be quicker without the need of form work associated with

cast-in-place girders. The lighter self-weight would also increase allowable live loads

the bridges would be able to carry.

US Transportation Collection