Author:
Silvani Carina,Souza Júnior Alexandre de,Lima Alisson do Nascimento,Azevedo Vitor Braga de,Varela Gilson Gabriel Teixeira,Santana Júnior Pedro Raimundo,Silva Jucimara Cardoso da
Abstract
The use of Polyethylene Terephthalate (PET) as an additive in the stabilization of swelling soils is a sustainable option considering the increasing environmental pollution caused by improper disposal of plastic waste. Given the limited capacity of recycling programs, incorporating these materials in construction can be a viable solution. In the conducted study, compacted mixtures of soil-lime-PET were prepared at different dry unit weights (14, 15 and 16 kN/m³). Micronized PET was used with percentages of 5% and 10%, while hydrated lime was added at 0%, 2%, 4%, and 6%, both by dry mass. These mixtures were subjected to one-dimensional swelling tests. The results showed that the PET content, lime content, and porosity are significant factors influencing the behavior of compacted mixtures. The index porosity/volumetric lime content adjusted by an exponent (ƞ/(Liv)-0,26) can link the one-dimensional swelling behavior. The combination of both materials creates a sustainable solution for controlling soil swelling.
Publisher
South Florida Publishing LLC
Reference41 articles.
1. ABDELKADER, H. A. M. et al. An experimental study on geotechnical properties and micro-structure of expansive soil stabilized with waste granite dust. Sustainability, v. 14, n. 10, p. 6218, 2022.
2. ALVAREZ, A. et al. Improved mechanical properties of a high plasticity clay soil by adding recycled PET. In: IOP Conference Series: Materials Science and Engineering. IOP Publishing, 2020. p. 012075.
3. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM). C837: Standard test method for methylene blue index of clay, ASTM International, West Conshohocken, PA, 2019.
4. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM). D2487: Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System), ASTM International, West Conshohocken, PA, 2018.
5. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM). D4546: Standard Test Methods for One-Dimensional Swell or Collapse of Soils, ASTM International, West Conshohocken, PA, 2021.