Special-Uses-Alkali - Expanded Shale & Clay

Table 3. KAOROCK ion penetrability.Sample ID Water to Cement Ion Penetrability(w/c) Ratio (Coulombs)Baseline 0.40 5000Silica Fume 0.40 2000MK235 0.40 500MK349 0.40 500Baseline 0.50 5200Silica Fume 0.50 2800MK235 0.50 1000MK349 0.50 1500Baseline 0.60 6100Silica Fume 0.60 3900MK235 0.60 2000MK349 0.60 3000ASTM C 1260 testing on the baseline and the ASTM C 1567 testing have been summarizedbelow in Table 4. It is important to note here that according to ASTM C 1567, expansions of lessthan 0.10% are indicative of non-deleterious expansion. While only one of the combinationsaccomplished the expansion criteria, the data shows that the use of a natural pozzolan mitigatesthe effects of ASR to a better standard than does the baseline or silica fume tested.Table 4. KAOROCK expansions.Replacement 14-DaySample IDLevel of Cement ExpansionBaseline N/A 0.62%Silica Fume 8% 0.53%Silica Fume 15% 0.39%MK235 8% 0.19%MK235 15% 0.09%MK349 8% 0.22%MK349 15% 0.14%10