1 Utilization of Industrial By-Products and Waste in ECO- Cement

This paper presents a new approach to the production of High Volume Mineral Additive (HVMA) or ECO- cement. ECO- cement technology is based on the intergrinding of portland cement clinker, gypsum, mineral additives, and a special complex admixture, Supersil ica. This new method increases the compressive strength of ordinary cement to 140 MPa and also permits the util ization of a high volume (up to 60%) of indigenous mineral additives in the cement composition. The research results demonstrate that a high volume of natural materials (natural pozzolans, alumosilicates, l imestone, sand) and industrial by-products (granulated blast furnace slag, fly ash) and waste (chemical wastes, broken glass and ceramic) can be used as mineral additives in ECO- cement. The maximum quantity of mineral additives in ECO- cement depends on the type of mineral admixtures and the desired strength/durability level. The optimization of the composition of ECO- cement allows the production of the cement with maximal strength and at minimal cost