Evaluation of the influence of lime and polyethylene tereftalate (PET) fibers in the shear strength of sandy soil

• Grant number: 18/19224-0
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: February 01, 2019
• End date: January 31, 2020
• Field of knowledge: Engineering - Civil Engineering - Geotechnical Engineering
• Principal Investigator: Paulo César Lodi
• Grantee: Murilo Ortega Godoy
• Host Institution: Faculdade de Engenharia (FE). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil

Abstract

This work will evaluate the effects of shear strength of sandy soil by the inclusion of different sizes and percentages of polyethylene fibers and lime. The soil used will be sandy soil typical of the Bauru region (SP). The fibers shall be strips drawn from disposable bottles of lengths of 10, 15, 20 and 30 mm and a width of 1,5 mm. These will be randomly added to the soil in predetermined percentages of 0.75; 1.0; 1.5 and 2.0%, in relation to the dry mass. The lime will be added in percentages of 2, 4, 6, 8 and 10% in relation to the dry mass. Compaction tests (Proctor Normal) will be performed to obtain optimum soil parameters with the addition of lime in different percentages. With these values, specimens will be molded to perform direct shear tests in the limed soil (with and without fibers) in the degree of compaction of 95%. This proposal aims to complement research already in progress (Fapesp Processes numbers: 2016/09677-1, 2016/18625-5, 2018/06336-4 and 2018/06329-85). In this way, it will be possible to verify by means of the comparison of the obtained results, the influence that the dimensions and percentages of the fibers and percentages of lime can cause in the shear strength of the sandy soil.