Abstract
The use of biomass to generate energy has grown significantly in recent years in response to social awareness and renewable-based sustainability policies geared to conserving the environment and eradicating coal as a raw material in electric power production. The bioenergy industry also gives rise to by-products or waste, however, most of which are presently deposited in landfills. This study aims to characterise three types of biomass waste from Spanish bioenergy plants with a view to their valorisation as additions in the design of new eco-efficient cements with a lower clinker content. The focus is on the pozzolanicity of this waste and the hydration products formed in the biomass waste/Ca(OH)2 system. The findings show that irrespective of their nature, all three types of waste are apt for use in the cement industry or in concrete as supplementary cementitious materials.
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