Self consolidating concrete for precast prestressed concrete bridge elements Free sexy sex dating instant browse
This study describes the first experience of using SCC for prestressed concrete bridge girders in North Carolina.
A multiple-span bridge is currently under construction in eastern North Carolina using one hundred thirty AASHTO Type III girders, each 54.8 ft (16.7 m) long (NCDOT Project 8.1170903).
Two of the girders were cast with SCC and one with conventional concrete as the control.
The next phase involved casting four SCC and two conventional concrete precast prestressed bridge girders using locally available materials from Plant-A and Plant-B (three girders per plant).
The girders were Mn/DOT 36M I-girders with a span length of 38 ft, and design concrete compressive strengths of 7.5 ksi at release and 9.0 ksi at 28 days.
The plastic and hardened properties of both the SCC and the conventional concrete were monitored and measured.
The fresh properties of SCC included unit weight, air content, slump flow, Visual Stability Index (VSI), and passing ability as measured by J-ring and L-box.
Some states are allowing the use of SCC bridge girders.