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Table 7 PAC test plan.

From: Laboratory Investigation into the Flexural Behavior of Embedded Concrete Sleepers in Two-Stage Concrete with Preplaced Ballast Aggregate

w/c

Ballast grade

Sand mix

0.4

Ballast grade 1

Sand mix 1

0.35

0.4

Ballast grade 4

0.35

0.4

Ballast grade 1

Sand mix 2

0.35

0.4

Ballast grade 4

0.35