| Title |
Engineering Properties of HPFRCC Depending on Various Fiber Mixing Ratio and ERCO Contents |
| Authors |
Jo, Sung-Jun ; Han, Cheon-Goo |
| DOI |
https://doi.org/10.5659/JAIK_SC.2017.33.2.45 |
| Keywords |
HPFRCC ; ERCO ; Fiber mixing ratio ; Autogenous shrinkage |
| Abstract |
Recently, because of increasing terrorisms, and accidents related with explosion, concerns on safety of human in building structures have been increased globally. Keeping up with this global issue, the research on high performance fiber reinforced cementitious composites (HPFRCC) with improved toughness due to the fiber reinforcement has been conducted in order to compensate the drawbacks of currently used concrete materials with low tensile strength and brittle failure mode. From the former research, some problems of severe autogenous shrinkage due to low water-to-binder ratio came up, and to achieve the efficient anti-explosive performance the optimizing proportion between short steel (SS) fiber and long organic (OL) fiber for combined fiber-reinforcement were required. Therefore, in this research, before applying HPFRCC on test-bed in military facility, the influence of various proportions of SS and OL and ERCO dosages on engineering properties of HPFRCC was analyzed. From the experiment, considering appropriate workability, strength, and autogenous shrinkage reducing, 1 to 1.5 of SS to OL and 0.5 % of ERCO addition were evaluated as the most appropriate conditions. |