Lightweight Concrete for High Strength - Expanded Shale & Clay

Figure 5.6 Use of Taut Wire for Deflection Measurement at Midspan
The force in each prestressing strand was measured using load cells on each strand at the
anchor.
5.4 Girder Construction
The six girders were constructed at Tindall Corporation precast plant in Jonesboro, Georgia
using plant personnel and standard precast plant procedures. The authors together with Georgia Tech
students installed and measured all instrumentation and fabricated all material test specimens. The
girders were constructed in three identical sequences. During each sequence, two girders were
constructed. During the first sequence, girders G1A and G1B were constructed. During the second
sequence, girders G2A and G2B were constructed. During the third and final sequence, girders G1C
and G2C were constructed.
Prestressing strands 0.6-in diameter were stressed; non-prestressed reinforcement was placed
(Figure 5.7), forms were erected, and the HPLC was batched and then placed using Tuckerbilt transit
trucks. The mixes used are shown in Table 5.2.
5-8