Plastic waste is accumulating with the progression of time, posing significant difficulty around the world. As a result, effective solutions to environmental concerns are required. There is also another issue, which is that projects frequently encounter weak soil, which must be modified. The purpose of this paper is to conduct a comprehensive study of the literature in order to compile information on utilization of waste plastic in geotechnical engineering applications specially in soils stabilizing. This article summarizes the local researches that is done in this topic to determine the use of waste plastic as material for reinforcing soil in Iraq. According to the outcomes of this study, plastic waste can be utilized as an eco-friendly and cost-effective way to improve the strength of the soil. It has been discovered that adding (0.5-4) wt. % plastic waste to a property improves its value. In terms of additive dimensions, it was explored that plastic waste with a greater aspect ratio produced greater test results. Finally, when compared to non-stabilized samples, compaction parameters, shear strength parameter, and CBR (California bearing ratio), of stabilized samples were significantly enhanced.

Sustainable utilization of polyethylene terephthalate in producing local precast flooring concrete slabs

The goal of this study is to assess the opportunity of utilizing waste iron filings in altered fractions as a fine aggregate replacement to produce the reactive powder concrete. Four different fractions of waste iron filing were adopted to reactive powder concrete mixture to measure the difference, which may be achieved in the strengths of the reactive powder concrete. In order to accomplish the aim of the investigation, compressive strength, and direct tensile strength were executed to determine the effect of iron filings on the strength of reactive powder concrete. Consistent with the experimental results, it can be stated that higher fraction of waste iron filings is more effective than the other percentages in both compressive and direct tensile strength because it acquires the maximum strength properties in the shortest duration. The increasing of the compressive strength and the direct tensile strength at 28 days for 30 % of the irons filings was 30.3% and 31.8% correspondingly.

The objective of this paper is to inspect the effect of changing the density of the impressed current and wetting-drying condition on accelerated corrosion of reinforced concrete specimens by a galvanostatic method. Small-scale reinforced concrete columns were prepared and then artificially corroded by different setups of accelerated corrosion under an impressed current and also under different wetting-drying cycles for comparison. The density of the impressed current ranged between 50 and 500 µA/cm2 with different wetting-drying cycles periods. Corrosion current, and cracking were monitored throughout the accelerated corrosion period to determine the level of damage caused by the development of expansive reinforcement steel corrosion products, appearance of the first crack, and pattern of cracking.The results indicated that the galvanostatic method with wetting-drying sequences can be utilized effectively to simulate the normal corrosion of steel reinforcement in the concrete structure. The usage of different intensities of the current has no influence on the crack pattern. Though, increasing the current level leads to a substantial increase in the crack width due to corrosion of the steel reinforcement in a shorter time.

The aim of current experimental research is to examine the performance of the Reactive Powder Concrete modified by Pulverized Local Wastes materials. In this research, Reactive Powder Concrete was adapted by using local wastes (finely crushed ceramic tiles wastes) with Portland cement, silica fume, water, and chemical admixture through partially replacement of fine sand for sustainable practice in construction. This study exploited normal curing process at ambient temperatures as an alternative of higher temperatures steam curing for sustainability of construction works. To assess the behavior of the modified Sustainable Reactive Powder Concrete mixes, splitting and compressive strengths of Reactive Powder Concrete were inspected experimentally, and then associated with traditional Reactive Powder Concrete mix (the control mix). Furthermore, the hardened density of the modified Sustainable Reactive Powder Concrete was checked. The inquiry results directed that substituting the fine sand partially by Pulverized Local Wastes (finely crushed ceramic tiles wastes) is an adequate method for construction applications. Consequently, the compressive strength and spilling strength of modified Sustainable Reactive Powder were maintained by using 10 % of finely crushed ceramic tiles wastes. Results illustrate that Reactive Powder Concrete have an insignificant strength loss with 10 % sand replacement for compressive strength and splitting strength. The reduction percent in the compressive strength and splitting strength at 28 days are 12.37% and 8.55%, respectively, linked with related control mix.

Plastic materials can now be intelligently and creatively utilised in civil engineering applications such as the creation of soil improvement materials to accomplish economic goals while diminishing the environmental impact of plastic waste. In this study, the influence of adding recycled polyethylene terephthalate granules (PET)) to the strength properties of subbase soil was investigated. The adopted fractions of waste plastic granules ranged between 2.5% and 12.5% by volume, and optimum moisture content (OMC) and maximum dry density (MDD) were measured in modified subbase soil with these various waste plastic contents. The California bearing ratio test (CBR) was then implemented for each alternative. The outcomes illustrated that the modified subbase properties were significantly enhanced by the addition of waste plastic granules and that, for best results, the optimal percentage of recycled polyethylene terephthalate granules to be added was 10% by the volume of the subbase material. The increment in the California bearing ratio value for modified subbase as compared with the subbase without waste plastic reached as high as 36%, suggesting that this method can provide a potential practical use for waste plastic as well as achieving enhancement of subbase soil layers for flexible pavement.