Assessment of glass fiber-reinforced polyester pipe powder in soil improvement

Abstract

This study investigates the use of glass fiber-reinforced polyester (GRP) pipe powder (PP) for improving the bearing capacity of sandy soils. After a series of direct share tests, the optimum PP addition for improving the bearing capacity of soils was found to be 12%. Then, using the optimum PP addition, the bearing capacity of the soil was estimated through a series of loading tests on a shallow foundation model placed in a test box. The bearing capacity of sandy soil was improved by up to 30.7%. The ratio of the depth of the PP-reinforced soil to the diameter of the foundation model (H/D) of 1.25 could sufficiently strengthen sandy soil when the optimum PP ratio was used. Microstructural analyses showed that the increase in the bearing capacity can be attributed to the chopped fibers in the PP and their multiaxial distribution in the soil. Besides improving the engineering properties of soils, using PP as an additive in soils would reduce the accumulation of the industrial waste, thus providing a twofold benefit.

Strength and Microstructure of a Clayey Soil Stabilized with Natural Stone Industry Waste and Lime or Cement

“…Fly ash has also been studied for soil stabilization with good results, reporting a decrease in plasticity and an increase in soil strength [4][5][6]. Other industrial by-products, such as waste glass, are also being investigated for soil improvement [7,8]. These sustainable materials can be used as a partial replacement for traditional binders, especially inert by-products.…”

Effects of glass fiber reinforced polymer pipe waste powder usage on concrete properties

“…Therefore, various levels of waste material arise during the production process of FRP composites and when they complete their service life in sectors such as construction, aviation, and automobile. Many researches have been done on the recycling of FRP waste materials and their disposal by using them in different materials (Asokan et al, 2010(Asokan et al, , 2009Bağriaçik et al, 2021;Bağrıaçık et al, 2020;Beycioğlu et al, 2020;Cestari et al, 2018;Clark et al, 2020;Dehghan et al, 2017;Farinha, de Brito, & Veiga, 2019;Osmani & Pappu, 2010;Özüyaǧli et al, 2016;Ribeiro et al, 2013;Saikia & De Brito, 2012). For example, in the review study on the use of plastic waste materials in concrete, it was stated that plastic affects the workability depending on the geometry of the aggregate, and the compressive strength value of the concrete decreases as the amount of plastic increases (Saikia & De Brito, 2012).…”