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Optimising Concrete Properties by Using Waste as Filler

Mix Design Improvement for Concrete Pavers


Construction Industry uses important volumes of raw materials and energy. Sustainability criteria as a method to select materials are a social and economic requirement, which has to be considered. The present development refers to concrete products that represent a competitive alternative where traditional methods are not available. The method proposed consists of designing mixes used for the manufacturing of con- crete pavers based on particle interference theory. Partial replacements of the fine fraction with a waste coming from the crushing aggre- gate activity were assessed compared to an aggregate grading actually used by an Argentinian paver manufacturer as a reference. Physical and mechanical properties of mortars with those aggregate combinations were determined. The process of optimization led to the identifi- cation of mixes with equivalent mechanical behavior, less cement content and the disposal of a percentage of fines originated by crushing aggregates. The three parameters that lead to sustainability are fulfilled in this way. By making use of a waste, an environmental problem is reduced and that implies a social improvement. Besides more economic concrete mixes are obtained.

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CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 12 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

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