Abstract
This experimental study investigates material properties and durability of high-strength concrete (HSC) using ground-granulated blast-furnace slag (BS) and hooked steel fiber. The test results indicated that the compressive and flexural strengths of the BS-blended concretes are higher than those of ordinary Portland cement up to 28-day aging after steam curing. The porosity decreased with the usage of the BS, and thus, the matrix became dense. Therefore, the BS-blended HSC is highly impermeable to water, regardless of whether it undergoes cracking, and some negative effects on the resistance against freezing and thawing actions. In addition, it has low resistance to carbonation despite low amounts of calcium hydroxide. However, it was confirmed that used as structural materials can be resistant to carbonation in long-term durability. Keywords: High-strength Concrete, Ground Granulated Blast Furnace Slag (BS), Strength Characteristic, Water Permeability, Durability
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