Abstract

SILVA, Yimmy; ROBAYO, Rafael; MATTEY, Pedro  and  DELVASTO, Silvio. Obtaining self-compacting concrete using demolition waste. Rev. LatinAm. Metal. Mater. [online]. 2015, vol.35, n.1, pp.86-94. ISSN 0255-6952.

One of the main environmental problems is the disposal or recycling of big volumes of waste materials from construction and / or demolition. One of the most common materials in these residues are waste clay bricks bonded with cement mortar (masonry waste-MW). Only a city as Bogotá, Colombia, produces approximately 15 million cubic meters each year of debris from construction. Therefore the aim of this investigation was the use of grinding masonry waste in the production of self-compacting concrete (SCC) as a replacement of cement at different percentages, ranging from 10% to 50% by weight. The Properties in fresh state of CAC were assessed using the slump flow cone Abrams, L-box and V- funnel. In order to maintain an adequate flow in the CAC was required increasing dosis of superplasticizer when the replacement of portland cement was greater. There was also an evaluation of mechanical properties such as compression strength and indirect tensile. The best results were obtained with substitution of cement in percentages of 10% and 20%; with higher rates of substitution as 30% and 50% there were achieved significant resistances, although they were slightly minors. Based on these experimental evidences, it can be said that the use of masonry waste is promising in the manufacture of self-compacting concrete, especially in the diminishing of costs of production and in the impact on environmental aspects.

Keywords : Self-compacting concrete; Construction debris; masory wastes; clay brisks.

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