Abstract

FUENTES MOLINA, Natalia; FRAGOZO TARIFA, Oscar Iván  and  VIZCAINO MENDOZA, Lissette. AGRO-INDUSTRIAL WASTE AS ADDITIONS IN DEVELOPMENT OF CONCRETE BLOCKS NO STRUCTURAL. Cienc. Ing. Neogranad. [online]. 2015, vol.25, n.2, pp.99-116. ISSN 0124-8170.  https://doi.org/10.15665/re.v13i1.348.

The introduction of industrial waste as a substitute for cement in organic building blocks makes it possible a broad environmental, social and economic development. In this research ecological blocks were made with commercial dimensions at industrial level, in which a percentage of the cement content was replaced with rice husk, rice husk ashes and fly ash (characterized by tests of particle size, unit weight and moisture ) in 10, 15 and 20 %; keeping the amount of mixing water and sand block constant. The obtained organic blocks were mechanically analyzed, and the compressive strength was determined, obtaining average results of 0.585 MPa, 0.743 MPa and 0.956 MPa for rice husk, rice husk ash and fly ash respectively at 7, 28 and 45 days of curing. Those resistances were compared with the reference100 % cement block, resulting in 0.802 MPa, in order to observe cementitious characteristics of the additions, which greatly affect the eco-block resistance. Through the results obtained, it was concluded that the optimum addition rate is 15 % of ashes from thermal power plants at 28 days of curing, as a partial replacement of cement in concrete blocks. Although there is a decrease in resistance compression and tension in some cases, it is feasible using additions in the making of concrete blocks as an effective proposal for reusing those wastes and lead towards the development of technical, economic and environmentally competitive materials.

Keywords : Industrial Ashes; Agricultural Waste; Residual Additive; Eco-blocks.

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