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Vol. 25 No. 43 (2016)

Papers

Production of building elements based on alkali-activated red clay brick waste

https://doi.org/10.19053/01211129.v25.n43.2016.5294

Published 2016-09-01

  • Rafael Andres Robayo-Salazar
    • ,
  • Ruby Mejía de Gutiérrez
    • ,
  • Alexandra Jimena Mulford-Carvajal

Rafael Andres Robayo-Salazar
Universidad del Valle (Cali – Valle del Cauca, Colombia).

Ruby Mejía de Gutiérrez
Universidad del Valle (Cali – Valle del Cauca, Colombia).

Alexandra Jimena Mulford-Carvajal
Universidad del Valle (Cali – Valle del Cauca, Colombia).

Abstract

This paper analyzes the feasibility of reusing a red clay brick waste (RCBW) in order to produce building elements such as blocks, pavers and tiles, by using the technique of alkaline activation. The production of these building elements was based on the design of a hybrid mortar with 48.61 MPa of compressive strength, at 28 curing days at room temperature (25 °C). The hybrid mortar was synthesized by adding 10% by weight of Portland cement (OPC) to the RCBW, Red Clay Brick Waste. As alkaline activators were used commercial industrial grade sodium hydroxide (NaOH) and sodium silicate (Na2SiO3). Building elements were physically and mechanically characterized, according to Colombian Technical Standards (NTC). This technology process is presented as an alternative for the reuse of RCBW and its contribution to the environmental sustainability.

Keywords

alkaline activation, building elements, geopolymer mortars, Red Clay Brick Waste (RCBW)

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