Research Letter
Effect of Incorporating Nanoporous Metal Phosphate Materials on the Compressive Strength of Portland Cement
Table 1
Material specifications and composition.
| Material | Specifications | Specified field composition | Mass-normalized field specified composition | Material specifications used in revised laboratory mix comparison | Mass-normalized laboratory composition |
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| Cement | Portland Type I or Type I/II
sulfate-resistant cement | 381 kg/m3 | 0.27 | Portland Type I and II | 0.27 |
| Fly Ash | Class F fly ash; nominal 15%
of cement by volume | 54 kg/m3 | 0.04 | Class F fly ash; nominal 20%
of cement by volume | 0.04 |
| Coarse aggregate | no. 676 or equivalent (3/4”
nominal size) | 55% by volume | 0.04 | — | — |
| Fine Aggregate | Sand | 45% by volume | 0.51 | <2 mm sand | 0.51 |
| Water | Nominal water:cement ratio:
0.4 | 399 kg/m3 | 0.10 | Water-to-cement ratio: 0.5 | 0.13 |
| Steel Fiber | Deformed Type I, nominal length 2.5–3.8 cm
(1–1.5”) | 59 kg/m3 | 0.04 | Iron Particles, −200 mesh | 0.04 |
| Air Content | — | % | — | — | % |
| Polyheed 997 | — | — | — | Water-entraining agent | 0.007 |
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