###### Abstract  
Since between 1.5 and 8 kg (400 kg/patient/year) of biomedical polymeric waste (BPW) is usually discarded by landfilling or combusting after each dialysis treatment, this study provides evidence for safe and environment-friendly utilisation of BPW, sourced from dialysis treatment and donated by the health and industrial partners, by incorporating it in high-strength concrete. Moreover, the paper aims to provide engineers, designers, and the construction industry with information regarding the mechanical performance of high-strength concrete containing BPW, and the susceptibility of the current international codes and standards on the prediction of the mechanical performance. A new concrete mix design incorporating BPW was proposed and verified by several trial mixes. Three Soft, Hard, and Hybrid BPW were added to the conventional high-strength concrete in different percentages ranging from 1.5% to 9% by weight of cement. Afterwards, the fresh and hardened concrete properties, namely slump, density, compressive strength, tensile strength, modulus of elasticity, and Scanning Electron Microscopy (SEM), were investigated, and existing prediction models were employed to verify their suitability for the new concrete. Generally, adding Hybrid BPW resulted in better mechanical performance than soft or hard BPW addition, while eliminating the waste separation phase. The results also showed that the mechanical performance of BPW-containing concrete is predictable by current codes, addressing possible engineering design limitations. New higher accuracy regression-based models were also proposed to reach better engineering interpretations. g 2021 21 February 2021 2  
methods like autoclaving and microwaving are considered more environmentally friendly than incineration, the waste does not change in volume after treatment. It should be retreated by incineration that increases the disposal cost and makes the disinfection process redundant [12, 13]. Combusting by-products are also highly carcinogenic, leading to human reproductive diseases and damage to the excretory and reproductive systems [14, 15]. On the other hand, considering the literature in the case of BPW-containing concrete, it is necessary to study the incorporation of BPW in structural high-strength concrete as most of the previous studies investigated using polymeric waste in normal strength concrete, and there is a need for more strength (AS 3600 [16], ACI 318-11 [17]) regarding the structures exposed to severe environments. Besides, separating the BPW based on their softness (polypropylene, low-density polyethylene, nylon, and silicon), hardness (polyvinyl chloride, high-density polyethylene) [10], and combinations (hybrid) can be of high importance when studying the new concrete properties. The waste separation process can be eliminated if the Hybrid BPW-containing concrete can be proven to have a better performance. There is also a scarcity of information regarding evaluating and comparing the properties of BPW-containing high-strength concrete with standard codes for engineering design purposes. Concerning the concrete's workability containing polymeric waste, almost all previous works confirm a decrease in the slump [18, 19, 20, 21, 22, 23, 24, 25, 26]. However, [PERSON] and [PERSON] [27], who have investigated concrete containing three shredded fine range, coarse range, and heat-treated pellet shapes, have reported an increase in the slump by employing heat-treated pellet shape plastics and a decrease in the slump by using fine and coarse shredded types. Moreover, regarding different hardened properties of concrete containing polymeric waste, [PERSON] et al. [28] utilised the BPW ash as filler in concrete. It resulted in higher compressive and tensile strength due to its pozzolanic property. Some other studies also employed the BPW as ash in mortars and concrete and recommended it as a pozzolanic material and filler. However, there are still several environmental concerns for that purpose [29, 30, 31]. [PERSON] et al.