| 고강도 시멘트 복합체의 강도특성에 미치는 혼합재료의 영향 |
| 최일규, 김정환1, 한기성 |
인하대학교 무기재료공학과
1한일시멘트연구소 |
| An Effect of Blending Materials on the Strength Characteristics of High Strength Cement Composite |
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| ABSTRACT |
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High strength cement composites (W/C=0.1) were prepared by using various blending materials such as SiC whisker and white carbon (hydrated silica: SiO2·nH2O). The effect of various blending materials on the microstructure and strength of the hardened cement paste were investigated in the view of fracture mechanics. The plain specimen showed 101 MPa of flexural strength, 81 GPa of Young's modulus and 1.32 MPam1/2 of fracture toughness. When the blending materials were added to the composites, their values were enhanced to about 110∼138 MPa, 95∼146 GPa and 1.32∼1.87MPam1/2 respectively. The improvement of the mechanical strength for the hardened cement paste may be due to the removal of macropores, the reduction of total porosity, pozzolanic reaction and the increase of various fracture toughening effect. |
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