Recycling of Steel Slag for Energy Saving and its Application in High Performance Concrete

The recycling of steel slag will inevitably become an important measure for the environment protection and therefore will be of great significance. The manufacturing of Portland cement is a highly energy-intensive process, recycling utilization of many industrial by-products are available in large quantities that can be used to replace Portland cement in concrete, called as supplementary cementitious materials or mineral additives. Workability, mechanical properties and durability of concrete can be greatly improved with the advanced mineral admixtures. The workability and mechanical properties of steel slag concrete with different types of steel slag and different dosage of admixtures are studied. The experimental results showed the effect of steel slag powder on concrete performance. When compound mineral admixtures with steel slag powder and blast-furnace slag powder are mixed into concrete, the performance of concrete can be improved further due to the synergistic effect and mutual activation.