11 - Properties of SCC with supplementary cementing materials

Abstract

The use of cementitious/pozzolanic materials in the production of self-compacting concrete (SCC) as partial replacement of cement is necessary for several reasons: (1) it reduces the production cost since cementing materials are usually cheaper than portland cement, (2) it contributes to concrete sustainability by reducing the amount of cement production, thus less CO2 emission in the atmosphere, and (3) it helps preserve natural resources by reducing the amount of industrial-by-product dumped in the landfill. The hydration process, as well as the hydration products of such materials however, is different than those of portland cement and their use in the production of concrete, in general, might adversely affect the structural performance of reinforced concrete structures. This chapter presents the properties of SCC made with supplementary cementing materials as partial replacement of cement as well as the effect of such materials on its rheological and mechanical properties. It also provides important recommendations on the advantages/disadvantages of using each material as well as the optimum/recommended percentage in replacing portland cement.