Effect of Assembly Unit of Expansive Agents on the Mechanical Performance and Durability of Cement-Based Materials

This paper studies the influence of assembly unit expansive agents (CaO and calcium sulphoaluminate) on limited free compressive strengths, expansion rate, carbonation resistance, chloride ion penetration resistance corrosion reinforcement concrete. The dosages agent were 0%, 3%, 6%, 9%, 12% by total amount cementitious materials. Two kinds mineral admixture (blast furnace slag fly ash) applied in this study. Results show that suitable dosage (lower than or equal to 9%) double with a large admixtures can improve strengths. However, when is higher addition leads reduction variation limit rate reaches maximum value curing age 14 days. increasing lower water-binder ratio demonstrate positive effect rate. Concrete 60% (fly ash ground granulated blast slag) shows strength concrete 50% admixtures. Finally, incorporation carbonation, anti-corrosion steel bars mechanical strengths (the strengths).