| Title |
Studies on the Durable Characteristics of Self-Healing Concrete with High Water-Tightness for Artificial Ground |
| Authors |
Song, Tae-Hyeob ; Park, Ji-Sun ; Kim, Byung-Yun |
| DOI |
https://doi.org/10.5659/JAIK_SC.2019.35.9.199 |
| Keywords |
Artificial Ground; High Watertightness; Self-healing; Durability |
| Abstract |
Experimental study on the durability characteristics to examine the feasibility of concrete with high water-tightness and self-healing
performance to minimize maintenance of concrete for artificial ground is as follows. 1) When blending agent, swelling agents, and curing
accelerator were added on the ternary system cement with blast-furnace slag fine particles and fly ash to give a self-healing property, higher
blending strengths by 82% at design standard strength of 24MPa and by 74% at design strength of 30MPa, respectively could be obtained.
2) The permeability test for the specimens having high water-tightness and no shrinkage showed that the permeability was reduced at
maximum of 98%. However, the permeability was decreased as the design strength was increased, showing the reduction rate of 87% at the
design strength of 50MPa. 3) The depth of carbonation of blast-furnace slag and fly ash was increased in all the specimens compared with
those of OPC only. However, as the material age was increased, carbonation penetration depth was decreased compared with the reference
blend. 4) Compared with the reference blending using only OPC, the freeze-thaw resistance was higher in the case of blending with 40% of
blast-furnace slag and 10% of fly ash at the design standard strength of 50MPa. In addition, the freeze-thaw resistance in general was
superior in the design standard strength of 50MPa with the lower water-binder ratio (W/B) as compared with the design standard strength of
24MPa and 30MPa with the high water-binder ratios. |