| Title |
Influence of Mixing and Curing Conditions on the Strength Development of Ultra-High Strength Polypropylene Fiber Reinforced Cementitious Composites |
| Authors |
So Hyoung-Seok ; Jin Sung-Hoon |
| Keywords |
Ultra-high Strength ; Polypropylene Fiber ; Light-weight ; Constitute Factor ; Curing Condition |
| Abstract |
Fiber Reinforced Ultra-High Cementitious Composite (FR-UHCC) is an ultra high-strength and high ductility composite material which has shown some promises in the civil engineering community by its advanced mechanical properties. However, due to the use of very fine sand instead of ordinary aggregate, the cement factor of the FR-UHCC is as high as 900~1000 kg/m3. And its density is as high as 3.0 g/cm3 by pressing fresh FR-UHCC samples in order to improve the strength. High density and high cement content may be a weakness for practicality and economic feasibility. This study is an elementary experiment to develop the FR-UHCC considered the practicality and economical efficiency, for that the various FR-UHCC was made using the constitute factors and curing conditions. And the influence of the parameters on the strength development of FR-UHCC was investigated. The result has shown that it is possible to produce ultra-high strength FR-UHCC with a density as low as 1.82 g/cm3 by the autoclave curing condition (160℃) and increasing of the silica fume/cement ratio (SF/C=80%). And an economical high strength FR-UHCC with the cement contents less than 600kg/m3 (which contains high-volume of the blast furnace slag) is produced in this study, and its compressive strength is 144 MPa and the density is 2.17 g/cm3. |