Research Article
Experimental Study on the Performance and Microstructure of Cementitious Materials Made with Dune Sand
Table 1
Properties of OPC, GGBS, and dune sand.
| | | Item | | | Cement (OPC) | GGBS | Dune sand |
| | Chemical composition (wt%) | | | | | CaO | 62.25 | 37.04 | 8.76 | | SiO2 | 19.28 | 32.90 | 65.63 | | Al2O3 | 6.77 | 15.36 | 12.63 | | Fe2O3 | 3.47 | 2.46 | 3.42 | | MgO | 2.68 | 10.18 | 4.52 | | Na2O | 1.18 | 1.12 | 1.83 | | K2O | 0.36 | 0.15 | 1.87 | | SO3 | 1.64 | 0.08 | 0.06 | | TiO2 | — | — | 0.58 | | Loss on ignition | — | 0.38 | — |
| | Physical properties | | | | | Specific gravity (g/cm3) | 3.10 | 2.84 | — | | Specific surface (m2/kg) | 385 | 425 | — | | Fineness modulus | — | — | 0.85 | | Initial setting time (min) | 90 | — | — | | Final setting time (min) | 185 | — | — |
| | Mineralogical composition (wt%) | | | | | C3S | 51.69 | — | — | | C2S | 16.35 | — | — | | C3A | 12.07 | — | — | | C4AF | 10.54 | — | — |
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