Abstract
Hardened cement composites constituted of cement, ground granulated blast furnace slag powder and blast slag furnace sand as fine aggregate are excellent sulfuric acid resistance because of forming white colored protective film based on calcium sulfate. Assuming these composites applied for the concrete structures under the severe acid circumstance such as sewerage and acid hot spring, the basic mechanical properties of strengths, modulus of elasticity, fracture energy, a coefficient of thermal expansion were investigated. The flexural strength of reinforced concrete beam was experimentally obtained by the four point bending tests and structural characteristics were discussed. Furthermore, the load test for reinforced concrete beam after soaking in the sulfuric acid were also carried out in order to apply the precast concrete products for practical infrastructures.
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