15 March 2001
12.3. Severity Levels Applicable to Alkali-Silica Reaction (use deduct curves for Durability
12.3.1. L. Alkali-silica reaction is noted on only a small portion of the slab and produces no
FOD (Figure 12.6.).
12.3.2. M. Alkali-silica reaction is noted over the entire slab, but no loose aggregate exists
12.3.3. H. Alkali-silica reaction is causing scaling and producing FOD (Figure 12.7.).
12.4. How to Count. If two or more levels of severity exist on a slab, the slab is counted as one
slab having the maximum level of severity. For example, if both low-severity crazing and medium
scaling exist on one slab, the slab is counted as one slab containing medium scaling. If "D"
cracking is counted, scaling is not counted.
12.5. Options for Repair.
12.5.1. L. Do nothing.
12.5.2. M. Partial-depth patch; slab replacement.
12.5.3. H. Slab replacement.