Abstract
A series of nano-ZrO2 reinforced cementitious composites were prepared through mixing prepared nano-ZrO2 suspension with Class G oil well cement in rotary mixer. The rheological properties of cement slurry, the mechanical properties and microstructure of cementitious composites were studied. The results indicated that the addition of nano-ZrO2 below 1 wt% meet the requirements of cementing construction. The early compressive strength of cement stone for 1 day was about 35.6 MPa∼41.8 MPa when the amount of nano-ZrO2 was 0.05 wt%∼1 wt%. The elastic modulus of nano-ZrO2 cement stone was 8.14 GPa under uniaxial stress state. Microstructure analysis revealed that nano-ZrO2 could enhance the toughness of cement paste.
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