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(iii) Tianshan cement section which did not employ admixture or
ber.
The
first slab: One crack. Its length was 7 cm, and its width was nearly 1 mm.
The second slab: One crack. Its length was 12 cm, and its width was nearly
1 mm.
The third slab: Three cracks. Their lengths were 5, 9, and 11 cm, respectively,
and their width was nearly 1 mm.
The fourth slab: Three cracks, which were located at the middle and side parts of
the slab. Their lengths were 15, 9, and 9 cm, respectively, and their width was
approximately 1
2mm.
-
The
fifth slab: No crack.
The sixth slab: One crack. Its length was 5 cm, and its width was nearly 2 mm.
The seventh slab: No crack, but 5 sand holes.
The eighth slab: No crack.
The ninth slab: No crack.
Figure
16.10
shows photographs of the fourth slab.
There were 5 cracking slabs in Tianshan cement section which did not employ
admixture or
fiber. The total number of cracks was 9, and the length of which was
82 cm.
On the afternoon of July 7, construction summary meeting on experimental
section built on July 6 was held in headquarters
meeting room. All technicians took
part in the meeting, and the following conclusions were drawn based on experiment
on July 6.
'
(i) On the whole, experiment on night of July 6 was more successful than the
last day. Temperature was nearly the same as previous day, and
field wind
force was always around 1
2 grade; from casting and napping, the situation
was nearly the same as Tianshan cement section previous day.
-
Fig. 16.10 Crack on slab
which did not employ
admixture or
ber
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