Polymer applications to control soil expansion
Mariano Tomás Fernandez1; Mauro Codevilla1; Teresa María Piqué2; Diego Manzanal3
1 INTECIN-UBA-CONICET, FIUBA; 2 ITPN-UBA-CONICET, FIUBA; 3 INTECIN-UBA-CONICET, FIUBA, UNPSJB
Baixar PDF doi:10.20906/CPS/CB-02-0052
Resumo
Polymer applications to control soil expansion FERNÁNDEZ, Mariano Tomás a,d, CODEVILLA, Mauro a,d, PIQUÉ, Teresa María a,b, MANZANAL, Diego ,a,c,d. a Facultad de Ingeniería, Universidad de Buenos Aires (UBA), Argentina. b Inst. de Tecnología en Polímeros y Nanotecnología ITPN -UBA-CONICET, Argentina. c Facultad de Ingeniería, Universidad Nacional de la Patagonia (UNPSJB), Argentina. d Inst. de Tecnología y Ciencias de la Ingeniería INTECIN-UBA-CONICET, Argentina. Abstract. The purpose of this study is to evaluate the efficiency of different soil-polymers mixtures to control soil expansion processes. This work is part of an ongoing research project carried out at the University of Buenos Aires. Several authors have studied the use of additives for the treatment of different types of soils for improving their physical, hydraulic and mechanical properties. Traditional inorganic additives such as lime, cement or fly ash have been used mainly in base materials, roads and highways, embankments and foundations. The use of polymeric organic additives within the infrastructure industry is still in the learning stage, whereas they have been extensively implemented in agriculture in arid and semi-arid areas to control fines migration and improve water retention properties. The soil-polymers mixture were carried out with a high plasticity clay from Comodoro Rivadavia (Argentina) and three type of polymers: lignine, CPAM (cationic polyacrylamide) and starch. To assess the impact of polymer quantity within mixtures, three weight proportions were tested for each polymer type: 1.5, 3.0 and 5.0%. The clay exhibits plastic volumetric behaviour over a wide range of moisture contents. Damages on light buildings caused by soil expansion were reported many times at the site (S. Orlandi et al, 2015). Its physical and mechanical characterization was done on later works (L. Marti et al., 2015). The research was divided in two stages. Firstly, physical and mechanical characterization (Atterberg limits, shrinkage lim
Palavras-chave: Polymers; Soil stabilization; Expansive soils; Suction