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The influence of graphene oxide (GO) on the properties of sulfoaluminate cement-based grouting materials was investigated. The macroscopic performance tests reveal that with the increase of GO dosage, the fluidity of the slurry decreases, but the mechanical properties of sulfoaluminate cement-based grouting materials are significantly improved. When the GO dosage is 0.01%, 0.03%, 0.05% and 0.07%, compared with the control group, the 7-day compressive strengths are increased by 4.7%, 14.1%, 13.3% and 11.7% respectively. The mechanical strength enhancement effect of the material is the most significant when the GO dosage is 0.03%, indicating that GO has a remarkable promoting effect on the hydration reaction of sulfoaluminate cement-based grouting materials, and 0.03% is the optimal dosage. XRD and SEM analyses reveal that GO optimizes the microstructure through a bridging effect. Although no new products are formed, the stability of sulfoaluminate cement-based grouting materials and their durability in underground environments are significantly enhanced. The study indicates that GO can improve the early strength and long-term durability of sulfoaluminate cement-based materials, which is of great value for engineering applications.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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