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Computers and Concrete
  Volume 21, Number 4, April 2018 , pages 377-384
DOI: https://doi.org/10.12989/cac.2018.21.4.377
 


Use of e-plastic waste in concrete as a partial replacement of coarse mineral aggregate
Marian Sabau and Johnny R. Vargas

 
Abstract
    The accelerated increase of the population growth rate in the world and the current lifestyle based on consumerism considerably increased the amount of waste generated by the human activity. Specifically, e-plastic waste causes significant damage to the environment because of its difficult degradation process. This paper aims to establish the feasibility of using eplastic waste in concrete as a partial replacement of coarse mineral aggregate. Considering a control mix without e-plastic waste designed for a compressive strength of 21 MPa, tests on concrete mixes with 40, 50 and 60% of e-plastic waste aggregate to determine the fresh and hardened properties were carried out. A reduction in the compressive strength as the percentage of eplastic waste increases was observed, the maximum reduction being 44% with respect to the control mix. In addition, a significant reduction as much as 22% in the density of the concrete mixes with e-plastic waste was recorded, which means that lighter elements can be produced with this type of concrete. Two new equations based on regression analysis of the experimental data from this study were proposed. These equations estimate the reduction in the compressive strength of concrete mixes with e-plastic waste aggregate at 14 and 28 days. A cost analysis and a practical alternative to introduce this waste material into the market are also presented.
 
Key Words
    waste management; recycling; e-plastic waste; aggregates; compressive strength; social housing
 
Address
Marian Sabau and Johnny R. Vargas: Department of Civil and Environmental Engineering, Universidad de la Costa, 080020 Barranquilla, Colombia
 

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