Summary Report of Experimental Study on Dehydration Crack Appearing in the Construction of Turpan Civil Airport Cement Concrete Pavement - The Issues and Discussion of Modern Concrete Science - page 223

Fig. 16.8 Crack on slab which employed admixture and ber

(ii) Tianshan cement section which employed admixture.

The first slab: No crack.

The second slab: One crack. The length was 13 cm, and the width was nearly
1 mm.
The third slab: One crack. The length was 5 cm, and the 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, 11, and 9 cm, respectively, and their width was
approximately 1

2mm.

-

The fifth slab: No crack.

The sixth slab: No crack.
The seventh slab: No crack, but 5 sand holes.
The eighth slab: One crack. Its length was 5 cm, and its width was nearly 1 mm.
The ninth slab: No crack.

Figure 16.9 shows photographs of the fourth and eighth slabs.
There were 4 cracking slabs in Tianshan cement section which employed
admixture. The total number of cracks was 6, and the overall length of which was
58 cm.

Fig. 16.9 Crack on slab which employed admixture