Geotechnical properties of reinforced clayey soil using nylons carry’s bags by products

Abstract

All structures built on soft soil may experience uncontrollable settlement and critical bearing capacity. This may not meet the design requirements for the geotechnical engineer. Soil stabilization is the change of these undesirable properties in order to meet the requirements. Traditional methods of stabilizing or through in-situ ground improvement such as compaction or replacement technique is usually costly. Now a safe and economic disposal of industrial wastes and development of economically feasible ground improvement techniques are the important challenges being faced by the engineering community. This work focuses on improving the soft soil brought from Baghdad by utilizing the local waste material for stabilization of soil, such as by using “Nylon carry bag’s by product” with the different percentage and corresponding to 1 %, 3% and 5% (the portion of stabilizer matters to soil net weight) of dried soil. The results indicated that as Nylon’s fiber content increases, the liquid limit decreases while the plastic limit increases, so the plasticity index decreases. Furthermore, the maximum dry density decreases while, the optimum moisture content increases as the Nylon’s fiber percentage increases. The compression index (decreases as the Nylon’s fiber increases and provides a maximum of 43% reduction by adding 5% nylon waste material. In addition, the results indicated that, the undrained shear strength increases as the nylon fiber increases.

Zeminlerin Doğal ve Sentetik Lifler ile Güçlendirilmesi Üzerine Bir Derleme Çalışması

“…As a consequence of the examination of the effects of fiber addition on the stress-strain behavior of soils classified as CL according to the unified soil classification system (Asadollahi and Dabiri, 2017;Salim et al, 2018;Prabakar and Siridihar, 2002;Al-Adili, 2012;Najjar et al, 2014;Ple and Le, 2012), it was observed that the UCS, cohesion and internal friction angle values of the soil with the addition of glass fiber with 10 mm length and the content of 0,8% by weight are increased approximately 33%, 33% and 24%, respectively. Moreover, with the addition of 6 mm length of 5% nylon fiber by volume, the undrained shear strength of the soil increased approximately 120%, and with the addition of 20 mm length of 0,75% sisal fiber by weight the undrained cohesion and internal friction angle values increased approximately 267% and 11%, respectively.…”

“…They explained that the initial stiffness of the cement-fiber-soil mixture was less than that of the cemented-soil and that the stiffness decreased with the increase of cement content in the cement-soil-fiber mixture. Salim et al (2018) used recycled nylon fibers obtained from waste nylon bags to stabilize a soft clay soil with low bearing capacity and high compressibility. They used fibers of 6 mm length at the content of 1-5%.…”

“…In addition, in geotechnical engineering applications such as slope stability problems and stabilization, swelling and shrinkage effects, bearing capacity of road pavements and embankment, liquefaction, reinforcement of soils with high compressibility and very low shear strength, increasing the durability of soils under freeze-thaw cycles, soil stabilization techniques are frequently used. Soil stabilization methods used in geotechnical engineering applications can be grouped under three separate titles: i) Mechanical stabilization, ii) Chemical stabilization, iii) Combination of mechanical and chemical stabilization (Salim et al, 2018;Estabragh et al, 2012;Soltani et al, 2018). Chemical stabilization is carried out by adding materials such as cement, lime or polymer (resin) into the soil and the real chemical structure of the soil is changed with this method (Al-Rawas, 2002;İsmail et al, 2002;Tremblay et al, 2002;Bahar et al, 2004;Basha et al, 2005).…”

Stabilization of Clay Soil for the Durability of Structures: Case Study of the Soils of the Locality of Zalimé, Commune of Zogbodomey in the Republic of Benin

“…In geotechnics, several techniques are used to improve soils. Stabilization is the method of mixing different soils or adding additives to soil to enhance soil characteristics such as strength, durability, gradation, and plasticity, which makes soils more stable [7]. The main purpose of soil mass reinforcement is to improve its stability to increase its bearing capacity, and to reduce settlements and lateral deformations [8].…”

“…There are different methods of soil reinforcement, such as: stone columns [10], root piles, soil nailing and reinforced earth. Reinforced earth is a composite material consisting of compacted backfill and artificial reinforcing materials such as fibrous materials (geosynthetic and randomly distributed fibers) [7].…”