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Crystal index R of portlandite of cement paste samples with different coal-derived carbon additives, commercial GO additive and the neat control sample.
| Control | C1 0.05 wt.% |
C2 0.025 wt.% |
C2 0.07 wt.% |
C3 0.025 wt.% |
GO 0.025 wt.% |
|
|---|---|---|---|---|---|---|
| Orientation Index of CH Crystal, R | 2.30 | 1.84 | 1.81 | 2.18 | 1.89 | 1.74 |
